Final Schedule import - Nerldc.in

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METERING MANUAL

As on

31.10.2021

NORTH EASRTERN REGIONAL

LOAD DESPATCH CENTRE

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Table of Contents

FOREWORD……................................................................................………....................................... 4

Section-1: Special Energy Meter, DCD and Technical Specifications

1.1 Special Energy Meter (SEM)............................................................................................... 6-8

1.1.1 Abou SEM.......................................................................................................................... 6

1.1.2 General Description of SEM............................................................................................. 6-7

1.1.3 Data Recording Format ................................................................................................... 7

1.1.4 Measurement Principle .................................................................................................. 7

1.1.5 Operating Section of the Meter...................................................................................... 8 1.1.6 Display Parameters.......................................................................................................... 8 1.1.7 Meter parts and overall dimension of the meter......................................................... 8

1.2 Data Collecting Device (DCD)............................................................................................... 9

1.2.1 About DCD...................................................................................................................... 9 Section-2: Regulatory Provisions and Standards

2.1 Metering Philosopy of CEA............................................................................................... 11-12 2.1.1 Types of Meters................................................................................................................ 11

2.1.2 Meter Standards.............................................................................................................. 11

2.1.3 Accuracy Class of Meters…............................................................................................ 11

2.1.4 Testing of Meters............................................................................................................... 12

2.1.5 Location of Meters............................................................................................................ 12

2.2 Philosophy for Installation of SEMs in NER............................................................. 13

2.3 Utility wise Meters in NER............................................................................................... 14-15

2.3.1 Breakup of meters in Powergrid sub-stations in NER............................................. 15

2.4 Constituent wise Metering Arrangement........................................................................ 16-36 2.4.1 Arunachal Pradesh............................................................................................................ 16-17

2.4.2 Assam................................................................................................................................. 18-20

2.4.3 Manipur............................................................................................................................. 20-21

2.4.4 Meghalaya......................................................................................................................... 22-23

2.4.5 Mizoram.......................................................................................................................... 23

2.4.6 Nagaland........................................................................................................................... 24-25

2.4.7 Tripura............................................................................................................................... 25-26

2.4.8 ER-NER............................................................................................................................. 26-27

2.4.9 Doyang.............................................................................................................................. 27-28

2.4.10 Khandong & Kopili-2...................................................................................................... 28-29

2.4.11 Kopili................................................................................................................................. 29-30

2.4.12 Kathalguri......................................................................................................................... 30-31

2.4.13 Loktak................................................................................................................................ 31-32

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Table of Contents

2.4.14 AGTCCPP...................................................................................................................... 32

2.4.15 Ranganadi...................................................................................................................... 33

2.4.16 Palatana........................................................................................................................... 34

2.4.17 BGTPP.............................................................................................................................. 35

2.4.18 Pare.................................................................................................................................... 36

2.4.19 Kameng........................................................................................................................... 37

2.5 Master Database of SEMs in NER...................................................................................... 38-51

Section-3: Processing and Computation of data

3.1 Data collection from Meters................................................................................................. 53-68 3.1.1 Data collection from SEM through DCD....................................................................... 53

3.1.1.1 Data tapping from Meter to DCD............................................................................. 54-55

3.1.1.2 Data dumping from DCD to PC by Vincom software for L&T Meters............... 55-58

3.1.1.3 Data dumping from DCD to PC by Vinplus software for L&T Meters............... 58-65

3.1.1.4 Data dumping from DCD to PC by Smartgrid software for SML Meters.......... 65-68

3.1.1.5 Sending data from metering location to RLDC........................................................... 68

3.2 Data collection from SEM hrough RS-485 Scheme......................................................... 68-70

3.2.1 Data collection through RS-485....................................................................................... 69-70

3.3 Automating Meter data collection/ Transmission....................................................... 71

3.3.1 Automatic Data collection.................................................................................................. 71

3.3.2 Automatic Data transmission.............................................................................................. 71

3.4 Receipt of SEM data at RLDC............................................................................................. 72 3.5 Softwares for data viewing/ conversion to TEXT file................................................... 72-91 3.6 Structure of NPC file.......................................................................................................... 92-93

Annexure-1…..................................................................................................................... 94-99

Annexure-2.......................................................................................................................... 100-101

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Foreword Special Energy Meter (SEM) with Data Collection device (DCD) was conceptualized and designed by POWERGRID in the beginning of 1990s to take care of metering requirements of bulk power tariff structure (post rationalization) in India in line with ECC recommendations which paved way for ABT (Availability Based Tariff) implementation in India. SEM/DCD was, therefore, a special metering package, aimed at fulfilling metering needs of ABT era. North-Eastern Region has the distinction of being the first region in the country to get SEMs installed during 1994-95, followed by Southern and Eastern Regions in the same year. As per IEGC provisions, CTU (POWERGRID) is responsible for installation as well as maintenance/testing of SEMs in ISTS. RLDCs validate and process the meter readings received from various locations for computation of REA. In case of any discrepancy/problem related to meter/accessories, RLDCs take up with respective RTS for rectification. In nutshell, metering activities are very streamlined and carried out in a specific time frame.

(a) Meter/DCD Commissioning, Maintenance, Testing – CTU (b) Weekly Data Collection / Transmittal to RLDC – Metering Locations (CTU, State, SLDC, ISGS) (c) Data Processing, Validation, Computation, Accounting, Metering Philosophy, Identification of Metering Locations – RLDC

The manual unfolds with detailed description of SEM/DCD in Section-1 followed by the regulatory requirements with details of meter location in the region in Section-2. Section-3 covers in great length, data collection from meters and transmittal to RLDC with special emphasis on future road map to automate the system. Finally, data checking, data validation, computation, and data archival, which are exclusive functions of RLDC, have been detailed in Section-4. Data Processing, Validation, Computation, Accounting, Metering Philosophy, Identification of Metering Locations have not been included to restrict the volume of the present manual.

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SECTION 1:

SPECIAL ENERGY METER, DCD AND

TECHNICAL SPECIFICAIONS

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1.1.1 About SEM

SEM is an application specific Microprocessor base solid-state energy meter. This together with a data collecting device (DCD) and a local Computer forms a powerful system of metering and data logging. This type of metering and data logging gives a unique method for measurement of all relevant electrical quantities. Taking help of the support software on a PC enables the user to process metered data and the data can also be viewed in a tabular format.

1.1.2 General Description of SEM

• Static Meter

• Accuracy class of 0.2S as per IEC 62053 standard

• Working voltage of 63.5V

• Secondary current rating of 1A (A-type) and 5A(B-type)

• Working range (-5 to 60 C)

• Real time clock (RTC) accuracy 30 sec/month

1.1 Special Energy Meter (SEM)

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• Extended temperature LCD for display

• Rechargeable Ni-Cd battery with a push button on front panel to operate during power failure

• Offline data collection possible for 6-7 hrs during power off condition

• Surface mounted, light in weight (<2.5kg)

• Mounting can be done on a flat surface, one hole on top and two holes at the bottom 1.1.3 Data Recording Format

Data recorded by the meters are normally not Windows readable. Therefore, data downloaded from the meters must be first converted to Windows readable form, usually a text file, for computation and analysis. This is explained in details in Section-4. Conversion software is required for this purpose which is proprietary to the meter supplier. All data of last 10 full days plus the most recent complete 15 min block data up to the time of collection is available. Last ten (10) full day’s data remain in non-volatile memory of meter and is available on collection of data.

1.1.4 Measurement Principle

a) Wh Measurement

The active energy (Wh) measurements are carried out on 3-phase, 4-wire principle with an accuracy as per class 0.2S of IEC-687/IEC-62053-22. The meter computes the net active energy (Wh) in each successive 15-minutes block and stores it in its non-volatile memory along with plus/ minus sign. The 15-minute Wh shall have a +ve sign when there is a net Wh export and a –ve sign when there is a net Wh import. Cumulative Wh reading at each midnight shall be stored in the meter’s memory along with plus/ minus sign. The meter shall store all data in its memories for a period of ten (10) days. The data older than ten (10) days shall get erased automatically.

b) VARh Measurement The meter shall also compute the reactive power (VAR) on a 3-phase 4-wire principle with an accuracy as per class 0.2S of IEC-687/IEC-62053-23. There shall be two reactive energy registers, one for the period when average RMS voltage is above 103% and the other for the period the voltage is below 97%. The registers will move forward when there is VARh export and will move backward when there is VARh import.

c) Average Frequency The meter shall count the number of cycles in VT output during each successive 15-minute block and divide the same by 900 (15*60=900) to arrive at the average frequency. The average frequency is stored in meter’s memory in 2-digit code neglecting decimals. In case the average frequency is less than 49.5 Hz, it is recorded as 00 and in case it is 50.5 Hz or higher it is recorded as 99. The actual frequency corresponding to two consecutive codes differ by 0.01Hz.

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1.1.5 Operating Section of the Meter a) Analog Section: High precision Current transformer and voltage transformer step down

input currents and voltages which are fed to an Analog to Digital converter. b) Digital Section: A powerful microprocessor controls the Analog and Digital sections.

Analog to Digital converters are fed from high precision instrument transformers. The Digital samples from Analog to Digital converter are used to process the metering data. The sampling rate is 3000 samples per second which gives the meter an exceptional accuracy and results.

c) Power supply Section: A switch mode power supply (SMPs) unit supplies power to the

meter’s internal circuit.

1.1.6 Display Parameters Special Energy Meters have the facility to display the following parameters: Display Parameter: Indication Display format 1. Meter identification code A NP1234A 2. Date (day, date, month, year) d dd-mm-yy 3. Time (hour, min, sec) t hh:mm:ss 4. Cumulative Wh reading c xxxx.x Wh 5. Reactive Power Pr xxx:x VAr 6. Average freq. of previous block F xx:xx 7. Net Wh transmittal-previous block E xx:xx 8. Average % voltage U xx:xx 9. Voltage high VArh register reading H xxxx:x VArh 10. Voltage low VArh register reading L xxxx:x VArh 11. Real time indication rtC Fit 12. Low battery indication Low Bat

1.1.7 Meter parts and overall dimension of the meter

CUTOUT

154 mm

150 mm

6 mm

25 mm

15 mm

262 mm

Mounting Holes

187+/- 2 mm

325+/- 2 mm77 mm

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1.2.1 About DCD

DCD is a small handheld terminal having 2MB FLASH RAM memory, capable of communicating with SEM as well as Computer. Both communications require suitable software to be present at either end. DCD is normally battery operated (9-volt), comprising of a keypad, LCD display and a communication slot. It is used for tapping data stored in a meter’s memory and transferring it to a computer. Each DCD is supplied with two sets of communication cables.

i) Data Cable: RJ-11 (telephone jack) or round 9-pin male connector (D-cable) at one

end for connecting with DCD and 9-pin female connector at other end for connecting either with optical cable or PC.

ii) Optical Cable: A cable with optical head at one end for coupling with SEM optical

port and 9-pin male connector at other end for connection with data cable.

LCD Display

9-Pin

Connector

Power

ON / OFF

switch

Status LEDs

RJ-11 Port

45 key

membrane

keypad

Battery Charging Socket

Data Cable D-Cable

Port

1.2 Data Collecting Device (DCD)

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SECTION-2:

REGULATORY PROVISIONS &

STANDARDS

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2.1.1 Types of Meters a) Interface Meter: Interface Meter means a Meter, connected at the point of interconnection with inter-State Transmission system (ISTS) for the purpose of electricity accounting and billing. Meter shall be owned by CTU.

b) Consumer meter: Consumer Meter means a Meter used for accounting and billing of electricity supplied to the consumer. Meter shall be owned by licensee.

c) Energy accounting meter: Energy Accounting and Audit Meter means Meter used for accounting of electricity to various segments of electrical system. Meter shall be owned by Generating Company or licensee

All interface meters, consumer meters and energy accounting and audit meter shall be of static type.

Note: Our focus is on SEMs which are interface meters. 2.1.2 Meter Standards

All interface meter, consumer meters, energy accounting and audit meters shall:

Comply with the relevant standards of Bureau of Indian Standards (BIS). If BIS Standards are not available for an equipment or material, the relevant British Standards (BS), International Electro-technical Commission (IEC) Standards, or any other equivalent Standards shall be followed.

Provided that whenever an International Standard or IEC Standard is followed, necessary corrections of modifications shall be made for nominal system frequency, nominal system voltage, ambient temperature, humidity, and other conditions prevailing in India before actual adaption of the said Standard.

2.1.3 Accuracy Class of Meters

Every meter shall meet the following requirements of accuracy class as specified in the standards.

Interface Meter …………………………………….…. 0.2S Consumer meters

Upto 650 Volts ……………………….….…. 1.0S Above 650 Volts & upto 33kV ……………. 0.5S Above 33kV …………………………….….. 0.2S

2.1 Metering Philosophy of CEA (vide notification dated 17.03.06 and amendments thereof)

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Energy accounting and audit meters ……………….... 0.2S Accuracy of meters in Generation and Transmission system will be of 0.2S class. 2.1.4 Testing of Meters

Meters shall be tested at site at least once in five years or whenever the accuracy is suspected, or the readings are inconsistent with the readings of the other meters. The testing must be carried out through National Accreditation Board for Testing and Calibration Laboratories (NABL) or any accredited test laboratory and recalibrated if required at manufacture’s works. The test must be carried out without removing the CTs and VTs connection

2.1.5 Location of Meters

Location Main Meter Check Meter Standby Meter

Generating Station

On all outgoing feeders including bus sectionalizer or tie line between two stages of generating stations having different tariffs or different ownership or both

On all outgoing feeders including bus sectionalizer or tie line between two stages of generating stations having different tariffs or different ownership or both

i. High Voltage side of Generator Transformers ii. High Voltage side of all Station Auxiliary Transformers

Transmission & Distribution System

i. At one end of the line between the stations of the same licensee ii. at both ends of the line between substations of two different licensees: Provided that meters at both ends shall be considered as Main meters for respective licensees

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i. There shall be no separate standby meter ii. Meter installed at other end of the line in case of two different licensees shall work as standby meter

Inter-Connecting Transformer (ICT)

High Voltage (HV) side of ICT

- Low Voltage (LV) side of ICT

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(A) Main meters

a) On all outgoing EHV feeders emanating from an ISGS b) On all identified inlet points of a state connected by EHV feeders.

(B) Check meters

a) On all outgoing EHV feeders emanating from an ISGS

(C) Stand-by meters

a) On EHV side of all GTs and STs at an ISGS. b) On one side of each CTU line connected between two CTU S/Ss c) On one side of each ICT connected between two EHV buses in CTU S/Ss. d) At CTU end of all EHV lines connected to State inlet points. e) On HV side of ICT f) Meter to be placed in 400 kV lines to record auxiliary consumption.

Philosophy adopted in NER before issue of CEA Metering Regulation, however,

fulfils CEA metering philosophy.

2.2 Philosophy for Installation of SEMs in NER

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2.3 Utility wise Meters in NER

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The metering arrangements for the constituents of NER are shown below: 2.4.1 ARUNACHAL PRADESH

Interconnection of Ar. Pradesh with the Grid

2.4 Constituent wise Metering Arrangement

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Following main and back up meters are used for calculating Ar. Pradesh state drawal. Location ID of AP SEM is denoted as AR-XX (where XX is ID no. of meters).

MAIN METER LOC ID

FEEDER NAME BACK UP METER LOC ID

KT-14 220 KV KATHALGURI - DEOMALI AR-07

PA-01 132 KV PARE - LEKHI AR-05

PA-05 132 KV PARE - CHIMPU AR-08

AR-06 132 KV ZIRO - RANGANADI RN-11

AR-09 132 KV CHIMPU - RANGANADI RN-20

AS-55 132 KV BALIPARA – TENGA/ KHUPI -

AR-03 132 KV NIRJULI -LEKHI AR-10

AR-19 132 KV ITANAGAR – BNC I AM-55

AR-20 132 KV ITANAGAR – BNC II AM-56

AR-01 NIRJULI TRANSFORMER INCOMER-I AR-21

AR-02 NIRJULI TRANSFORMER INCOMER-II AR-22

Fictitious meters are physically non-existent and are introduced for convenience of computation. For Net Drawal of Ar. Pradesh, one fictitious meter AR-51 is used.

(AR-51) = +(KT-14) +(PA-01) +(PA-05) -(AR-06) -(AR-09) +(AS-55) +(AR-03) +(AR-19) +(AR-20) +(AR-01) +(AR-02)

In fictitious meter, (-) is used if SEM is installed at inlet/injection point end. (+) is used if SEM is installed at the other end.

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2.4.2 ASSAM

Interconnection of Assam with the Grid

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Following main and back up meters are used for calculating Assam state drawal. Location ID of Assam meters is denoted as AS-XX (where XX is ID no. of meters).

MAIN METER LOC ID

FEEDER NAME BACK UP

METER LOC ID

AS-01 132 kV KAHELIPARA – UMTRU -1 ME-03

AS-02 132 kV KAHELIPARA – UMTRU -2 ME-04

AS-03 220 kV OLD MARIANI- KATHALGURI KT-01

AS-04 220 KV OLD MARIANI - MISA AS-37

AS-06 132 KV PANCHGRAM - LUMSHNONG ME-01

AS-07 132 kV PANCHGRAM - BADARPUR AS-22

AS-08 132 kV D’CHERA - DHARMANAGAR TR-06

AS-09 132 kV SARUSAJAI – UMTRU -1 ME-07

AS-11 132 kV HAFLONG CONSUMPTION AM-57

AS-13 132 KV GOHPUR - NIRJULI AR-04

AM-04 132 kV UMRANGSHOO - KHANDONG KK-32

AM-05 132 kV UMRANGSHOO – HAFLONG PG AS-69

AS-17 220 kV SAMAGURI – MISA - 1 AS-38

AS-18 220 kV SAMAGURI – MISA - 2 AS-39

AS-19 220 kV SONABIL - BALIPARA AS-42

AS-30 220 kV SALAKATI – BTPS -1 AS-15

AS-31 220 kV SALAKATI – BTPS -2 AS-16

AS-50 132 kV SARUSAJAI – UMTRU -2 ME-05

AS-73 132 kV RANGIA - MOTANGA ER-08

AS-77 132 kV SRIKONA – SILCHAR - 1 AS-75

AS-78 132 kV SRIKONA – SILCHAR - 2 AS-76

AS-79 132 kV HAILAKANDI – SILCHAR - 1 AS-82

AS-80 132 kV HAILAKANDI – SILCHAR - 2 AS-81

AS-86 132 kV AGIA – MENDIPATHAR ME-16

AS-93 400 kV AZARA - SILCHAR AS-89

KT-15 220 kV AGBPP – TINSUKIA - 1 AS-53

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KT-16 220 kV AGBPP – TINSUKIA - 2 AS-74

MN-06 132 kV JIRIBAM - PAILAPOOL AS-10

NG-08 132 kV DIMAPUR - BOKAJAN AS-63

AM-01 400 kV AZARA - BONGAIGAON AM-02

AM-10 132 kV BNC – PAVOI - 1 AM-12

AM-11 132 kV BNC – PAVOI - 2 AM-13

AM-53 132 kV KARINGANJ - BADARPUR ZZ-35

AM-54 132 kV KARIMGANJ - KUMARGHAT TR-10

For Net Drawal of Assam fictitious meter AS-51 is used.

(AS-51) = - (AS-01) - (AS-02) - (AS-03) - (AS-04) - (AS-06) - (AS-07) - (AS-08) - (AS-09) + (AS-11) + (AS-12) - (AS-13) - (AS-17) - (AS-18) + (AS-30) + (AS-31) + (AS-42) - (AS-47)*1.0309 - (AS-50) + (AS-56) + (AS-57) - (AS-77) - (AS-78) + (NG-08) + (MN-06) + (KT-15) + (KT-16) -(AS-80) -(AS-79) - (AS-73) - (AS-86) - (AS-93) - (AM-01) + (KK-32) + (AS-69) -(AM-12) -(AM-13) - (NT-14) -(NT-22) In fictitious meter, (-) is used if SEM is installed at inlet/injection point end. (+) is used if SEM is installed at the other end.

2.4.3 MANIPUR

Interconnection of Manipur with the Grid

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Following main and back up meters are used for calculating Manipur state drawal. Location ID of Manipur meters is denoted as MN-XX (where XX is ID no. of meters).

MAIN METER LOC ID


MN-03 132 kV KARONG-KOHIMA NG-02

LO-01 132 kV LOKTAK – RENGPANG MN-11

LO-04 132 kV LOKTAK – NINGTHOUKONG MN-02

MN-24 400 KV IMPHAL – THOUBAL-1 MN-28

MN-25 400 KV IMPHAL – THOUBAL-2 MN-29

MN-10 132 kV IMPHAL(PG) – NINGTHOUKONG MN-17

MN-12 132 kV JIRIBAM (PG) – JIRIBAM (MN) MN-19

ZZ-01 132 kV IMPHAL(S) – IMPHAL(PG)-1 MN-05

MN-23 132 kV IMPHAL(S) – IMPHAL(PG)-2 MN-16

MN-22 132 KV IMPHAL(PG) –IMPHAL(S)-3 MN-01

MN-04 132/33 kV TRF AT JIRIBAM -

MN-13 IMPHAL(PG) END TRF-1 -

MN-14 IMPHAL(PG) END TRF-2 -

For Net Drawal of Manipur, one fictitious meter MN-51 is used.

(MN-51) = -(MN-03) +(LO-01) +(LO-04) +(MN-24) +(MN-25) +(MN-10) +(MN-12)

- (ZZ-01) -(MN-23) +(MN-22) +(MN-04) +(MN-13) +(MN-14)


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2.4.4 MEGHALAYA

Interconnection of Meghalaya with the Grid

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Following main and back up meters are used for calculating Meghalaya state drawal. Location ID of Meghalaya meters is denoted as ME-XX (where XX is ID no. of meters).

MAIN METER

LOC ID FEEDER NAME

BACK UP

METER LOC ID

ME-03 132 kV UMTRU – KAHELIPARA-1 AS-01

ME-04 132 kV UMTRU – KAHELIPARA-2 AS-02

AS-50 132 kV SARUSAJAI - UMTRU -2 ME-05

AS-09 132 kV SARUSAJAI - UMTRU -1 ME-07

ME-01 132 kV LUMSHNONG – PANCHGRAM AS-06

ME-16 132 kV MENDIPATHAR- AGIA AS-86

ME-02 132 kV KHLRT (S) – KHLRT(PG)-1 ME-06

ME-08 132 kV KHLRT (S) – KHLRT(PG)-2 ME-09

AS-70 220 kV MISA-BYRNIHAT(KILLING)-1 ME-12

AS-72 220 kV MISA-BYRNIHAT(KILLING)-2 ME-13

ME-14 400 kV BYRNIHAT(KILLING)-B’GAON AS-85

ME-15 400 kV BYRNIHAT(KILLING)-SILCHAR-2 AM-03

For Net Drawal of Meghalaya, one fictitious meter ME-51 is used. (ME-51) = -(ME-03) -(ME-04) +(AS-50) +(AS-09) -(ME-01) -(ME-16) -(ME-02) -(ME-08)

+(AS-70) +(AS-72) -(ME-14) -(ME-15)


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2.4.5 MIZORAM

Interconnection of Mizoram with the Grid

Following main and back up meters are used for calculating Mizoram state drawal. Location ID of Mizoram meters is denoted as MZ-XX (where XX is ID no. of meters).

MAIN METER LOC ID

FEEDER NAME BACK UP

METER LOC ID

MZ-11 132kV KOLASIB - BADARPUR(PG) AS-23

MZ-12 132kV KOLASIB - AIZAWL(PG) MZ-08

MZ-14 132kV MELRIAT(PG) - ZUANGTUI *

MZ-02 132kV AIZAWL(PG) - LUANGMUAL *

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For Net Drawal of of Mizoram, one fictitious meter MZ-51 is used. (MZ-51) = - (MZ-11) - (MZ-12) + (MZ-14) + (MZ-02) In fictitious meter, (-) is used if SEM is installed at inlet/injection point end. (+) is used if SEM is installed at the other end.

2.4.6 NAGALAND

Interconnection of Nagaland with the Grid

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Following main and back up meters are used for calculating Nagaland state drawal. Location ID of Nagaland meters is denoted as NG-XX (where XX is ID no. of meters).

MAIN METER LOC ID

FEEDER NAME BACK UP

METER LOC ID

NG-02 132 kV KOHIMA - KARONG MN-03

NG-01 132 kV DIMAPUR (PG) - DIMAPUR (S) -1 NG-11

NG-17 132 kV DIMAPUR (PG) - DIMAPUR(S) -2 NG-18

NG-16 132kV DIMAPUR(PG) - KOHIMA(S) NG-19

NG-20 132kV MOKOCHANG (S) - MOKOK(PG) -1 *

NG-21 132kV MOKOCHANG (S) - MOKOK(PG) -2 *

DY-03 132 kV DHEP - SANIS NG-22

DY-04 132 kV DHEP - MOKOKCHUNG NG-05

For Net Drawal of Nagaland, one fictitious meter NG-51 is used.

(NG-51) = + (MN-03) + (NG-01) + (NG-17) -(NG-19) - (NG-20) - (NG-21) - (DY-03)

+ (DY-04)


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2.4.7 TRIPURA

Interconnection of Tripura with the Grid

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Following main and back up meters are used for calculating Tripura state drawal. Location ID of Tripura meters is denoted as TR-XX (where XX is ID no. of meters).

MAIN METER LOC ID

FEEDER NAME BACK UP

METER LOC ID

TR-06 132 kV D’NAGAR - DULLAV AS-08

TR-04 132 kV K’GHAT(PG) - P.K.BARI TR-03

TR-24 132 KV PK BARI-P BARI (S) TR-23

TR-25 132 KV PKBARI-AMBASSA TR-26

TR-29 132V SM NAGAR-SM NAGAR (S) TR-30

TR-28 132 KV SM NAGAR – B’NAGAR TR-27

TR-01 132 kV AGARTALA - AGTPP - 1 AG-01

TR-02 132 kV AGARTALA - AGTPP - 2 AG-02

TR-21 132 KV PK BARI- RC NAGAR-1 AG-16

TR-22 132 KV PK BARI –RC NAGAR-2 AG-17

PL-04 132 kV PALATANA - SM NAGAR TR-13

PL-03 132 kV PALATANA - UDAIPUR TR-14

For Net drawal of Tripura, one fictitious meter TR-51 is used. (TR-51) = - (TR-06) + (TR-04) +(TR-24) +(TR-25) +(TR-29) +(TR-28) - (TR-01) - (TR-02) +(TR-21) + (TR-22) - (TR-13) + (PL-03) In fictitious meter, (-) is used if SEM is installed at inlet/injection point end. (+) is used if SEM is installed at the other end.

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2.4.8 ER-NER

ER-NER Interconnection with the Grid

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Following main and back up meters are used for calculating Eastern Regional drawal. Location ID of Eastern Region meters is denoted as ER-XX (where XX is ID no. of meters).

MAIN METER LOC ID

FEEDER NAME BACK UP

METER LOC ID

AS-25 400 kV BONGAIGAON- BINAGURI -1 ER-01

AS-26 400 kV BONGAIGAON- BINAGURI -2 ER-02

AS-96 400 kV BONGAIGAON- ALIPURDUAR -1 ER-09

AS-97 400 kV BONGAIGAON- ALIPURDUAR -2 ER-10

AS-32 220 kV SALAKATI- ALIPURDUAR -1 ER-05

AS-33 220 kV SALAKATI- ALIPURDUAR -2 ER-03

AS-34 132 kV SALAKATI - GELEPHU_BHU ER-04

AS-73 132kV RANGIA – MOTANGA_BHU ER-08

For Net Drawal of Eastern Region, one fictitious meter ER-51 is used. (ER-51) = - (AS-25) - (AS-26) - (AS-96) - (AS-97) + (ER-05) - (AS-33) - (AS-34) + (ER-08)

2.4.9 DOYANG

Interconnection of Doyang with the Grid

31

Following main and back up meters are used for calculating Doyang injection. Location ID of Doyang meters is denoted as DY-XX (where XX is ID no. of meters).

MAIN METER LOC ID

CHECK METER LOC ID


DY-01 DY-10 132kV DHEP - DIMAPUR(PG) - 1 NG-14

DY-02 DY-11 132kV DHEP - DIMAPUR(PG) -2 NG-15

DY-03 DY-09 132kV DHEP - WOKHA / SANIS NG-04

DY-04 DY-12 132kV DHEP - MOKOKCHUNG NG-05

For Net injection of Doyang, one fictitious meter DY-71 is used. DY-71 = + (DY-01) + (DY-02) + (DY-03) + (DY-04) In fictitious meter, (-) is used if SEM is installed at inlet/injection point end. (+) is used if SEM is installed at the other end.

32

2.4.10 KHANDONG & KOPILI-II

Interconnection of Khandong & Kopili-II with the Grid

33

Following main and back up meters are used for calculating Khandong and Kopili-II injection. Location ID of Khandong and Kopili-II meters is denoted as KD-XX (where XX is ID no. of meters).

MAIN METER LOC ID

CHECK METER LOC ID

FEEDER NAME STAND-

BY METER LOC ID

KK-01 KK-32 132kV KHANDONG - UMRANGSHU

KK-02 KK-31 132kV KHANDONG - KHLRT - 1 ME-10

KK-03 KK-30 132kV KHANDONG - KHLRT - 2 ME-11

KK-04 KK-33 132kV KHANDONG - KOPILI -1 KK-08

KK-22 KK-29 132kV KHANDONG - KOPILI-2 KK-21

KK-17 KK-34 KOPILI GT OF STG-2

KK-19 KK-35 KOPILI STG-2 33 kV STN TRF

For Net injection of Khandong, one fictitious meter KD-71 is used. (KD-71) = + (KK-29) + (KK-30) + (KK-31) + (KK-32) + (KK-33) Net injection of Kopili-II is the summation of (KK-34) & (KK-35). Kopili-2 injection = + (KK-34) - (KK-35) In fictitious meter, (-) is used if SEM is installed at inlet/injection point end. (+) is used if SEM is installed at the other end.

34

2.4.11 KOPILI

Interconnection of Kopili with the Grid

Following main and back up meters are used for calculating Kopili injection. Location ID of Kopili meters is denoted as KK-XX (where XX is ID no. of meters).

MAIN

METER

LOC ID

CHECK

METER

LOC ID

FEEDER NAME

BACK UP

METER

LOC ID

KK-05 KK-24 220 kV KOPILI-MISA-1 AS-66



KK-08 KK-27 220 kV KOPILI-KHANDONG-1 KK-04

35

KK-21 KK-28 220 kV KOPILI-KHANDONG-2 KK-22

For Net injection of Kopili, one fictitious meter KP-71 is used. (KP-71) = + (KK-05) + (KK-06) + (KK-07) + (KK-08) + (KK-21) In fictitious meter, (-) is used if SEM is installed at inlet/injection point end. (+) is used if SEM is installed at the other end.

2.4.12 AGBPP (KATHALGURI)

Interconnection of AGBPP (Kathalguri) with the Grid

36

Following main and back up meters are used for calculating Kathalguri injection. Location ID of Kathalguri meters is denoted as KT-XX (where XX is ID no. of meters).

MAIN METER LOC ID

CHECK METER LOC ID

FEEDER NAME STAND-BY

METER LOC ID

KT-01 KT-19 220 kV AGBPP – MARIANI AS-03

KT-02 KT-20 220 kV AGBPP – MARIANI PG AS-94

KT-14 KT-21 132 kV AGBPP - DEOMALI AR-07

KT-15 KT-17 220 kV AGBPP- TINSUKIA-1 AS-53

KT-16 KT-18 220 kV AGBPP- TINSUKIA-2 AS-74

For Net injection of Kathalguri, one fictitious meter KT-71 is used. (KT-71) = + (KT-01) + (KT-02) + (KT-14) + (KT-15) + (KT-16) In fictitious meter, (-) is used if SEM is installed at inlet/injection point end. (+) is used if SEM is installed at the other end.

2.4.13 LOKTAK

Interconnection of Loktak with the Grid

37

Following main and back up meters are used for calculating Loktak injection. Location ID of Loktak meters is denoted as LO-XX (where XX is ID no. of meters).

MAIN METER LOC ID

CHECK METER LOC ID


LO-01 LO-09 132 kV LOKTAK - RENGPANG - 1 MN-11

LO-02 LO-10 132 kV LOKTAK - JIRIBAM - 2 MN-09

LO-03 LO-11 132 kV LOKTAK - IMPHAL (PG) MN-15

LO-04 LO-12 132 kV LOKTAK - NINGTHOUKHONG MN-02

For Net injection of Loktak, one fictitious meter LO-71 is used. (LO-71) = + (LO-01) + (LO-02) + (LO-03) + (LO-04) In fictitious meter, (-) is used if SEM is installed at inlet/injection point end. (+) is used if SEM is installed at the other end.

38

2.4.14 AGTCCPP

Interconnection of AGTCCPP with the Grid

Following main and back up meters are used for calculating R C Nagar injection. Location ID of R C Nagar meters is denoted as AG-XX (where XX is ID no. of meters).

MAIN METER LOC ID

CHECK METER LOC ID


METER LOC ID

AG-01 AG-13 132 kV AGTPP - AGARTALA - 1 TR-01

AG-02 AG-14 132 kV AGTPP - AGARTALA - 2 TR-02

AG-03 AG-15 132 kV AGTPP - KUMARGHAT TR-11

AG-16 AG-18 132 kV AGTCCPP- PK BARI-1 TR-21

AG-17 AG-19 132 kV AGTCCPP- PK BARI-2 TR-22

39

For Net injection of AGTPP, one fictitious meter AG-71 is used. (AG-71) = + (AG-01) + (AG-02) + (AG-03) +(AG-16) +(AG-17) In fictitious meter, (-) is used if SEM is installed at inlet/injection point end. (+) is used if SEM is installed at the other end.

2.4.15 RANGANADI

Interconnection of Ranganadi with the Grid

40

Following main and back up meters are used for calculating Ranganadi injection. Location ID of Ranganadi meters is denoted as RN-XX (where XX is ID no. of meters).

MAIN METER LOC ID

CHECK METER LOC ID


METER LOC ID

RN-01 RN-15 132 kV RANGANADI – PARE I PA-03

RN-18 RN-19 132 kV RANGANADI – PARE II PA-07

RN-02 RN-13 400 kV RANGANADI - BNC 1 AM-20

RN-03 RN-14 400 kV RANGANADI - BNC 2 AM-16

RN-11 RN-16 132 kV RANGANADI - ZIRO AR-06

RN-20 RN-21 132 kV RANGANADI - CHIMPU AR-09

For Net injection of Ranganadi, one fictitious meter RN-71 is used.

(RN-71) = + (RN-01) +(RN-18) + (RN-02) + (RN-03) + (RN-11) + (RN-20) In fictitious meter, (-) is used if SEM is installed at inlet/injection point end. (+) is used if SEM is installed at the other end.

2.4.16 PALATANA

Interconnection of Palatana (OTPC) with the Grid

41

Following main and back up meters are used for calculating Palatana (OTPC) injection. Location ID of Palatana (OTPC) meters is denoted as PL-XX (where XX is ID no. of meters).

MAIN METER LOC ID

CHECK METER LOC ID


METER LOC ID

PL-01 PL-16 400 kV PALATANA - SILCHAR -1 AS-83

PL-02 PL-17 400 kV PALATANA - SILCHAR -2 AS-84

PL-03 PL-18 132 kV PALATANA - UDAIPUR TR-14

PL-04 PL-19 132 kV PALATANA - SM NAGAR TR-13

PL-20 PL-22 400 kV PALATANA – SM NGR_ST TR-31

For Net injection of Palatana (OTPC), one fictitious meter PL-71 is used. (PL-71) = + (PL-16) + (PL-17) + (PL-18) + (PL-19) +(PL-20) In fictitious meter, (-) is used if SEM is installed at inlet/injection point end. (+) is used if SEM is installed at the other end.

42

2.4.17 BGTPP

Interconnection of BgTPP (NTPC) with the Grid

Following main and back up meters are used for calculating NTPC BgTP injection. Location ID of NTPC BgTP meters is denoted as NT-XX (where XX is ID no. of meters).

MAIN METER LOC ID

CHECK METER LOC ID


NT-01 NT-11 400 kV BgTPP - BONGAIGAON -1 AS-98

NT-02 NT-12 400 kV BgTPP - BONGAIGAON -2 AS-99

NT-22 NT-19 400 /220 kV BgTPP ICT-1 AM-42

NT-14 NT-17 400 /220 kV BgTPP ICT-2 AM-28

43

For Net injection of NTPC BgTP, one fictitious meter NT-71 is used. (NT-71) = + (NT-01) + (NT-02) + (NT-14) -(NT-22) In fictitious meter, (-) is used if SEM is installed at inlet/injection point end. (+) is used if SEM is installed at the other end.

2.4.18 PARE

Interconnection of Pare with the Grid

44

Following main and stand-by meters are used for calculating Pare injection. Location ID of Pare meters is denoted as PA-XX (where XX is ID no. of meters).

MAIN METER LOC ID

CHECK METER LOC ID

FEEDER NAME STAND-

BY METER LOC ID

PA-01 PA-02 132 kV PARE - LEKHI AR-05

PA-05 PA-06 132 kV PARE - CHIMPHU AR-08

PA-03 PA-04 132 kV PARE – RANGANADI-1 RN-01

PA-07 PA-08 132 kV PARE – RANGANADI-2 RN-18

For Net injection of Pare, one fictitious meter PA-71 is used. (PA-71) = + (PA-01) + (PA-03) + (PA-05) + (PA-07) In fictitious meter, (-) is used if SEM is installed at inlet/injection point end. (+) is used if SEM is installed at the other end.

2.4.19 KAMENG

Interconnection of Kameng with the Grid

45

Following main and back up meters are used for calculating KAMENG injection. Location ID of KAMENG meters is denoted as KA-XX (where XX is ID no. of meters).

MAIN METER LOC ID

CHECK METER LOC ID


KA-01 KA-02 400 kV KAMENG- BALIPARA (PG) - 1 AS-37

KA-03 KA-04 400 kV KAMENG- BALIPARA (PG) -2 AS-38

KA-05 KA-06 132kV KAMENG- KHUPI -

For Net injection of Kameng, one fictitious meter KM-71 is used.

(KM-71) = +(KA-01)+(KA-03)+(KA-05) In fictitious meter, (-) is used if SEM is installed at inlet/injection point end. (+) is used if SEM is installed at the other end.

46

2.5.1 List of SEMs installed in North-Eastern Region: LOCATION.ID

METER. NO

C.T. RATIO

P.T. RATIO

PLACE OF INSTALLATION OF SEM

AG-01 NP-9081-A 800 1200.0000 AGTPP END OF AGARTALA-1 FDR

AG-02 NP-9093-A 800 1200.0000 AGTPP END OF AGARTALA-2 FDR

AG-03 NP-9080-A 600 1200.0000 AGTPP END OF K'GHAT FDR

AG-04 NP-9479-A 250 1200.0000 AGTPP GTG-1

AG-05 NP-9605-A 250 1200.0000 AGTPP GTG-2

AG-06 NP-9604-A 250 1200.0000 AGTPP GTG-3

AG-07 NP-9517-A 250 1200.0000 AGTPP GTG-4

AG-08 NP-9480-A 50 1200.0000 AGTPP STN TRF-1

AG-09 NP-9482-A 50 1200.0000 AGTPP STN TRF-2

AG-10 NP-8802-A 150 60.0000 AGTPP STG-2 STUPPOW

AG-11 NP-9082-A 250 1200.0000 AGTPP STG-2

AG-12 NP-9079-A 250 1200.0000 AGTPP STG-1

AG-13 NP-9513-A 800 1200.0000 AGTPP END OF AGARTALA-1 FDR CHK METER

AG-14 NP-9514-A 800 1200.0000 AGTPP END OF AGARTALA-2 FDR CHK METER

AG-15 NP-9515-A 600 1200.0000 AGTPP END OF KUMARGHAT FDR CHK METER

AG-16 NP-9940-A 800 1200.0000 132 kV AGTPP END OF PK BARI (TSECL)- 1 MAIN METER

AG-17 NP-9941-A 800 1200.0000 132 kV AGTPP END OF PK BARI (TSECL)- 2 MAIN METER

AG-18 NP-9457-A 800 1200.0000 132 kV AGTPP END OF PK BARI (TSECL)- 1 CHECK METER

AG-19 NP-9456-A 800 1200.0000 132 kV AGTPP END OF PK BARI (TSECL)- 2 CHECK METER

AR-01 NP-9661-A 300 1200.0000 NIRJULI TRF INCOMER-1

AR-02 NP-9662-A 300 1200.0000 NIRJULI TRF INCOMER-2

AR-03 NP-9664-A 600 1200.0000 NRJ(PG) END OF 132kV LEKHI FDR

AR-04 NP-9663-A 300 1200.0000 NRJ(PG) END OF 132kV GOHPUR FDR

AR-05 NP-9652-A 600 1200.0000 LEKHI END OF 132KV PARE FDR

AR-06 NP-9704-A 150 1200.0000 ZIRO END OF 132KV RANGANADI FDR

AR-07 NP-9659-A 400 2000.0000 DEOMALI END OF 220KV KATHALGURI FDR

AR-08 NP-9586-A 400 1200.0000 CHIMPU END OF PARE FDR

AR-09 NP-9587-A 400 1200.0000 CHIMPU END OF 132KV RANGANADI FDR

AR-10 NP-9665-A 600 1200.0000 LEKHI END OF 132KV NIRJULI FDR

AR-11 NP-9526-A 300 300.0000 NAMSAI END OF TEZU

AR-12 NP-9524-A 300 300.0000 HV SIDE OF NAMSAI ICT-1

AR-13 NP-9525-A 300 300.0000 HV SIDE OF NAMSAI ICT-2

AR-14 NP-8372-A 300 1200.0000 TFR BAY AT NAHARLAGUN

AR-15 NP-7585-A ROING END OF TEZU

AR-16 NP-7586-A ROING END OF PASIGHAT

AR-17 NP-9696-A 600 TENGA END OF BALIPARA

AR-18 NP-9698-A 600 TENGA END OF BALIPARA CHECK

AR-19 NP-9935-A 800 1200.0000 132 kV ITANAGAR END OF BNC FDR 1

2.5 Master Database of SEMs in NER

47

LOCATION.ID

METER. NO

C.T. RATIO

P.T. RATIO


AR-20 NP-9939-A 800 1200.0000 132 kV ITANAGAR END OF BNC FDR 2

AS-01 NP-8490-A 400 1200.0000 KAHELIPARA END OF UMTRU-1 FDR

AS-02 NP-8488-A 400 1200.0000 KAHELIPARA END OF UMTRU-2 FDR

AS-03 NP-6888-A 800 2000.0000 MARIANI(AS) END OF KATHALGURI FDR

AS-04 NP-9700-A 800 2000.0000 MARIANI(AS) END OF MISA FDR

AS-05 NP-6887-A 400 1200.0000 MARIANI END OF GOLAGHAT FDR

AS-06 NP-7595-A 400 1200.0000 PANCHGRAM END OF LUMSHONG FEEDER

AS-07 NP-6872-A 600 1200.0000 PANCHGRAM END OF BDP(PG)FDR

AS-08 NP-9904-A 400 1200.0000 DULLAVCHERRA END OF D'NGAR FDR

AS-09 NP-9921-A 400 1200.0000 S'SAJAI END OF 132kV UMTRU FDR-1

AS-10 NP-8498-A 400 1200.0000 PAILAPOOL END OF JIRIBAM FDR

AS-11 NP-8494-A 150 1200.0000 HAFLONG CONSUMPTION (HAFLONG PF END OF HAFLONG AS)

AS-12 NP-8482-A 300 600.0000 BOKAJAN END OF 66 kV DIMAPUR FEEDER

AS-13 NP-9688-A 300 1200.0000 GOHPUR END OF 132KV NIRJULI FDR

AS-14 NP-5781-A 200 300.0000 UMRANGSOO CONSUMPTION

AS-15 NP-9070-A 800 2000.0000 BTPS END OF SALAKATI FDR-2

AS-16 NP-8476-A 800 2000.0000 BTPS END OF SALAKATI FDR-1

AS-17 NP-9583-A 500 2000.0000 SAMAGURI END OF MISA-1 FDR

AS-18 NP-9713-A 500 2000.0000 SAMAGURI END OF MISA-2 FDR

AS-19 NP-5795-A 400 2000.0000 SONABIL END OF 220kv BALIPARA-1 FDR

AS-21 NP-6870-A 600 1200.0000 BDP(PG)END OF JIRIBAM FEEDER

AS-22 NP-6871-A 600 1200.0000 BDP(PG) END OF PANCHGRAM FEEDER

AS-23 NP-6873-A 600 1200.0000 BDP(PG) END OF KOLASIB FDR

AS-24 NP-6874-A 300 1200.0000 BADARPUR(PG)END OF KHLRT FEEDER

AS-25 NP-8468-A 1000 3636.3636 BONG END OF BINAGURI-1 FEEDER

AS-26 NP-8469-A 1000 3636.3636 BONG END OF BINAGURI-2 FEEDER

AS-27 NP-9692-A 1000 3636.3636 BONG 400/220kV ICT (HV SIDE)

AS-28 NP-9474-A 1000 3636.3636 BONG END OF BLP-1 FEEDER

AS-29 NP-9626-A 1000 3636.3636 BONG END OF BLP-2 FEEDER

AS-30 NP-9434-A 800 2000.0000 SALAKATI END OF BTPS-1 FDR

AS-31 NP-9435-A 800 2000.0000 SALAKATI END OF BTPS-2 FDR

AS-32 NP-8800-A 600 1200.0000 SALAKATI END OF GELEPHU FEEDER

AS-33 NP-7581-A 800 2000.0000 SALAKATI END OF BIRPARA-1 FDR

AS-34 NP-5303-A 800 2000.0000 SALAKATI END OF BIRPARA-2 FDR

AS-35 NP-5299-A 1000 3636.3636 MISA END OF BALIPARA-1 FDR

AS-36 NP-5291-A 1000 3636.3636 MISA END OF BALIPARA-2 FDR

AS-37 NP-8605-A 800 2000.0000 MISA END OF MARIANI FDR

AS-38 NP-9501-A 500 2000.0000 MISA END OF SMG-1 FDR

AS-39 NP-9502-A 500 2000.0000 MISA END OF SMG-2 FDR

AS-40 NE-0004-A 1200 2000.0000 MISA 400/220KV ICT 1(LV SIDE) (EARLIER NP-8599-A)

AS-41 NP-5309-A 1000 3636.3636 BALIPARA 400/220KV ICT(HV)

AS-42 NP-9487-A 800 2000.0000 BALIPARA END OF 220kv SONABIL

AS-43 NP-9527-A 40 100.0000 ROWTA END OF BHUTAN (DAIFAM) FDR

AS-44 NP-9485-A 1000 3636.3636 BALIPARA END OF BNC FDR-1

AS-45 NP-9483-A 1000 3636.3636 BALIPARA END OF BNC FDR-2

AS-46 NP-4139-A 200 300.0000 GORGAON END OF 33KV NAGINIMORA FDR---REMOVED

48

LOCATION.ID

METER. NO

C.T. RATIO

P.T. RATIO


AS-47 NP-6893-B 40 300.0000 MARIANI END OF 33KV CHANKI FDR---REMOVED

AS-48 NP-0335-A 100 300.0000 RUPAI END OF 33KV NAMSAI FDR---REMOVED

AS-49 NP-0639-B 10 300.0000 LEKHAPANI END OF 33KV JAIRAMPUR FDR----REMOVED

AS-50 NP-9922-A 400 1200.0000 S'SAJAI END OF 132kV UMTRU FDR-2

AS-53 NP-9654-A 400 2000.0000 TINSUKIA END OF 220KV KTG FDR-I

AS-54 NP-6891-A 300 1200.0000 BALIPARA-KHUPI 220/132KV(LV) ICT

AS-55 NP-9606-A 300 1200.0000 BALIPARA END OF 132kV KHUPI FDR

AS-56 NP-6149-A 400 1200.0000 BALIPARA END OF 132KV DEPOTA FDR

AS-57 NP-6150-A 400 1200.0000 BALIPARA END OF 132KV SONABIL FDR

AS-58 NP-6890-A 250 1200.0000 BALIPARA-ASEB 220/132KV(LV) ICT

AS-59 NP-6147-A 400 1200.0000 SONABIL END OF 132KV BALIPARA FDR

AS-60 NP-6151-A 500 2000.0000 BALIPARA-ASEB 220/132KV(HV) ICT

AS-62 NP-6868-A 200 2000.0000 BALIPARA-KHUPI 220/132KV(HV) ICT

AS-63 NP-7587-A 400 1200.0000 BOKAJAN END OF 132KV DIMAPUR(PG) FDR

AS-64 NP-6877-A 400 1200.0000 GOLAGHAT END OF 132KV BOKAJAN FDR

AS-65 NP-8608-A 800 2000.0000 MISA END OF 220 kV NEW MARIANI FDR

AS-66 NP-8641-A 500 2000.0000 MISA END OF KOPILI-1 FDR



AS-69 NP-8502-A 400 1200.0000 HAFLONG END OF KHD FDR

AS-70 NP-9092-A 800 2000.0000 MISA END OF 220KV BYRNIHAT-I

AS-72 NP-9091-A 800 2000.0000 MISA END OF 220KV BYRNIHAT-II

AS-73 NP-9669-A 300 1200.0000 RANGIA END OF MOTONGA (DEOTHANG)

AS-74 NP-9658-A 800 2000.0000 TINSUKIA END OF KATHALGURI-II

AS-75 NP-9895-A 500 1200.0000 SILCHAR END OF SRIKONA-I

AS-76 NP-9897-A 500 1200.0000 SILCHAR END OF SRIKONA-II

AS-77 NP-9712-A 300 1200.0000 SRIKONA END OF SILCHAR-I

AS-78 NP-9711-A 300 1200.0000 SRIKONA END OF SILCHAR-II

AS-79 NP-5301-A 300 1200.0000 HAILAKANDI END OF SILCHAR-I

AS-80 NP-9478-A 300 1200.0000 HAILAKANDI END OF SILCHAR-II

AS-81 NP-9898-A 500 1200.0000 SILCHAR END OF HAILAKANDI-II

AS-82 NP-9900-A 500 1200.0000 SILCHAR END OF HAILAKANDI-I

AS-83 NE-0030-A 1000 3636.3636 SILCHAR END OF PALATANA-I (EARLIER NP-8659-A)

AS-84 NE-0042-A 1000 3636.3636 SILCHAR END OF PALATANA-II (NP-8660-A)

AS-85 NP-9398-A 1000 3636.3636 SILCHAR END OF BYRNIHAT-II

AS-86 NP-9455-A 400 1200.0000 AGIA END OF NANGALBIBRA

AS-87 NP-8643-A 500 1200.0000 MISA END OF DIMAPUR-I

AS-88 NP-8640-A 500 1200.0000 MISA END OF DIMAPUR-II

AS-89 NP-9499-A 1000 3636.3636 SILCHAR END OF 400 KV AZARA

AS-90 NP-9956-A 600 1200.0000 HAFLONG END OF JIRIBAM (OLD:NP-8656-A)

AS-91 NP-8493-A 600 1200.0000 BADARPUR END OF SILCHAR-1

AS-92 NP-8495-A 600 1200.0000 BADARPUR END OF SILCHAR-2

AS-93 NP-9981-A 2000 3636.3636 AZARA END OF 400 KV SILCHAR

AS-94 NP-8596-A 800 2000.0000 MARIANI (PG) END OF 220 KV Kathalguri

AS-95 NP-8591-A 800 2000.0000 MARIANI (PG) END OF 220 KV Misa

AS-96 NP-9072-A 2000 3636.3636 BONGAIGAON (PG) END OF 400 KV

49

LOCATION.ID

METER. NO

C.T. RATIO

P.T. RATIO


ALIPURDUAR 1

AS-97 NP-9069-A 2000 3636.3636 BONGAIGAON (PG) END OF 400 KV ALIPURDUAR 2

AS-98 NP-9476-A 1000 3636.3636 BONGAIGAON (PG) END OF 400 KV NTPC_BgTPP-1

AS-99 NP-9477-A 1000 3636.3636 BONGAIGAON (PG) END OF 400 KV NTPC_BgTPP-2

AM-01 NP-9983-A 2000 3636.3636 AZARA END OF 400 KV BONGAIGAON

AM-02 NP-9473-A 1000 3636.3636 BONGAIGAON END OF 400 KV AZARA

AM-03 NP-9437-A 1000 3636.3636 BONGAIGAON END OF 400 KV BYRNIHAT

AM-04 NP-5290-A 400 1200.0000 UMRANGSOO END OF 132 KV KHANDONG

AM-05 NE-0019-A 400 1200.0000 UMRANGSOO END OF 132 KV HAFLONG

AM-06 NP-9059-A 2000 3636.3636 BNC END OF 400 KV BALIPARA-1

AM-07 NP-9060-A 2000 3636.3636 BNC END OF 400 KV BALIPARA-2

AM-08 NP-9061-A 4000 3636.3636 AC SIDE CONV. TRF POLE-1 OF BNC

AM-09 NP-9089-A 600 3636.3636 BNC END 400/132 KV ICT-II HV SIDE

AM-10 NP-9678-A 400 1200.0000 BNC END OF PAVOI-II

AM-11 NP-9677-A 400 1200.0000 BNC END OF PAVOI-I

AM-12 NP-9680-A 300 1200.0000 PAVOI END OF BNC-I

AM-13 NP-8801-A 300 1200.0000 PAVOI END OF BNC-II

AM-14 NP-9679-A 200 300.0000 33 KV BNC-1

AM-15 NP-9062-A 2000 3636.3636 BNC END OF BLP-I LILO

AM-16 NP-9088-A 2000 3636.3636 BNC END OF RANGANADI-I LILO

AM-17 NP-9085-A 4000 3636.3636 BNC END BUS SECTION-I

AM-18 NP-9084-A 4000 3636.3636 BNC END BUS SECTION-II

AM-19 NP-9063-A 2000 3636.3636 BNC END OF BLP-II LILO

AM-20 NP-9086-A 2000 3636.3636 BNC END OF RANGANADI-II LILO

AM-21 NP-9087-A 600 3636.3636 BNC END 400/132 KV ICT-I HV SIDE

AM-22 NP-7601-A 4000 3636.3636 BNC END TIE-BAY OF CONV. TRF. POLE-1

AM-23 NP-9676-A 200 300.0000 33 KV BNC-2

AM-24 NP-6854-A 4000 3636.3636 BNC END TIE-BAY OF CONV. TRF. POLE-2

AM-25 NP-5798-A 4000 3636.3636 BNC END MAIN-BAY OF CONV. TRF. POLE-2

AM-26 NP-5800-A 1000 3636.3636 BALIPARA ICT-2 HV-SIDE

AM-27 NP-5811-A 800 2000.0000 BALIPARA ICT-2 LV-SIDE

AM-28 NP-5318-A 800 2000.0000 BTPS-ASSAM END OF NTPC 220 KV LINE

AM-29 NP-8661-A 600 1200.0000 SILCHAR END OF 132 MELRIAT-1

AM-30 NP-8561-A 600 1200.0000 SILCHAR END OF 132KV MELRIAT-2

AM-31 NP-5774-A 1600 2000.0000 LV SIDE OF 400/220KV BONG ICT-1

AM-32 NP-5773-A 1600 2000.0000 LV SIDE OF 400/220KV BONG ICT-2

AM-33 NP-5809-A 1600 2000.0000 BONG END OF 220KV SKL-1 FDR

AM-34 NP-5780-A 1600 2000.0000 BONG END OF 220KV SKL-2 FDR

AM-35 NP-9433-A 800 2000.0000 SKL END OF 220KV BONG-1 FDR

AM-36 NP-5783-A 800 2000.0000 SKL END OF 220KV BONG-2 FDR

AM-37 NP-9611-A 2000 3636.3636 BLP END OF 400KV KAMENG-1 FDR

AM-38 NP-9612-A 2000 3636.3636 BLP END OF 400KV KAMENG-2 FDR

AM-39 NP-9694-A 600 3636.3636 HV SIDE OF BONG ICT-2

AM-40 NP-9401-A 1000 3636.3636 HV SIDE OF MISA ICT-3

AM-41 NP-9402-A 800 2000.0000 LV SIDE OF MISA ICT-3

AM-42 NP-9647-A 1200 2000.0000 AEGCL END OF ICT I OF NTPC

50

LOCATION.ID

METER. NO

C.T. RATIO

P.T. RATIO


AM-43 NP-9959-A 1600 2000.0000 400/220 NEW MARIANI ICT-II LV SIDE

AM-44 NP-9950-A 3000 3636.3636 400/220 NEW MARIANI ICT-II HV SIDE

AM-45 NP-9928-A 3000 3636.3636 400 kV MISA-SILCHAR 1

AM-46 NP-9929-A 3000 3636.3636 400 kV MISA-SILCHAR 2

AM-47 NP-9892-A 2000 3636.3636 400 kV MISA-NEW MARIANI I

AM-48 NP-9894-A 2000 3636.3636 400 kV MISA-NEW MARIANI II

AM-49 NP-9958-A 1600 2000.0000 NEW MARIANI 400/220 kV ICT-I LV SIDE

AM-50 NP-9974-A 3000 3636.3636 400 kV NEW MARIANI- NEW KOHIMA (KMTL)-1

AM-51 NP-9980-A 3000 3636.3636 400 kV NEW MARIANI- NEW KOHIMA (KMTL)-2

AM-52 NP-9951-A 3000 3636.3636 NEW MARIANI 400/220 kV ICT-I HV SIDE

AM-53 NP-9690-A 600 1200.0000 132 kV KARIMGANJ END OF BADARPUR

AM-54 NP-9937-A 600 1200.0000 132 kV KARIMGANJ END OF KUMARGHAT

AM-55 NP-9961-A 800 1200.0000 132 kV BNC END OF ITANAGAR BNC FDR 1

AM-56 NP-9962-A 800 1200.0000 132 kV BNC END OF ITANAGAR BNC FDR 2

AM-57 NE-0026-A 600 1200.0000 132 kV HAFLONG (S) END OF HAFLONG PG

DY-01 NP-9066-A 300 1200.0000 DOYANG END OF 132KV DIMAPUR-1 FDR

DY-02 NP-9050-A 300 1200.0000 DOYANG END OF 132KV DIMAPUR-2 FDR

DY-03 NP-8799-A 300 1200.0000 DOYANG END OF 132KV WOKHA FDR

DY-04 NP-9053-A 300 1200.0000 DOYANG END OF 132KV MOKOK FDR

DY-05 NP-9052-A 25 1200.0000 DOYANG STN TRF

DY-06 NP-5283-A 125 1200.0000 DOYANG GT-1

DY-07 NP-5770-A 125 1200.0000 DOYANG GT-2

DY-08 NP-6034-A 125 1200.0000 DOYANG GT-3

DY-09 NP-9585-A 300 1200.0000 DOYANG END OF 132KV WOKHA FDR CHK

DY-10 NP-9584-A 300 1200.0000 DOYANG END OF 132KV DIMAPUR-1 FDR CHK

DY-11 NP-9481-A 300 1200.0000 DOYANG END OF 132KV DIMAPUR-2 FDR CHK

DY-12 NP-9516-A 300 1200.0000 DOYANG END OF 132KV MOKOK FDR CHK

ER-01 ER-1125-A 1000 3636.3636 BINAGURI END OF BONG FDR-1

ER-02 ER-1128-A 1000 3636.3636 BINAGURI END OF BONG FDR-2

ER-03 ER-1005-A 800 2000.0000 ALIPURDUAR END OF SALAKATI-1

ER-04 ER-1006-A 800 2000.0000 ALIPURDUAR END OF SALAKATI-2

ER-05 LT-0245-A 600 1200.0000 GELEPHU END OF SALAKATI FDR

ER-06 ER-1640-A 500 3636.3636 DURGAPUR FREQ BACKUP METER-1

ER-07 NP-8803-A 500 3636.3636 DURGAPUR FREQ BACKUP METER-2

ER-08 NP-9670-A 300 1200.0000 MOTANGA END OF 132 KV RANGIA

ER-09 NR-1492-A 3000 3636.3636 ALIPURDUAR end of 400 kV BONGAIGAON-1

ER-10 NR-1494-A 3000 3636.3636 ALIPURDUAR end of 400 kV BONGAIGAON-2

ER-11 LT-0332-A 150 1200.0000 SILICON VALLEY BHUTAN END

KA-01 NP-9588-A 2000 3636.3636 KAMENG END OF BALIPARA FDR-1

KA-02 NP-9589-A 2000 3636.3636 KAMENG END OF BALIPARA FDR-1 (CHECK METER)

KA-03 NP-9590-A 2000 3636.3636 KAMENG END OF BALIPARA FDR-2

KA-04 NP-9591-A 2000 3636.3636 KAMENG END OF BALIPARA FDR-2 (CHECK METER)

KA-05 NP-9608-A 300 1200.0000 KAMENG END OF KHUPI FDR-1

KA-06 NP-9630-A 300 1200.0000 KAMENG END OF KHUPI FDR-1 (CHECK METER)

KA-07 NP-9592-A 300 1200.0000 HV SIDE OF 132/33KV KAMENG SST

KA-08 NP-9686-A 200 300.0000 LV SIDE OF 132/33KV KAMENG SST ON

51

LOCATION.ID

METER. NO

C.T. RATIO

P.T. RATIO


KA-09 NP-9609-A 500 3636.3636 KAMENG GT-1

KA-10 NP-9632-A 500 3636.3636 KAMENG GT-2

KA-11 NP-9631-A 500 3636.3636 KAMENG GT-3

KA-12 NP-9629-A 500 3636.3636 KAMENG GT-4

KA-13 NP-9701-A 500 3636.3636 HV SIDE OF 400/132KV KAMENG ICT-1

KK-01 NP-9574-A 600 1200.0000 KHANDONG END OF HAFLONG FDR

KK-02 NP-9562-A 600 1200.0000 KHANDONG END OF KHLRT FDR-1

KK-03 NP-9714-A 600 1200.0000 KHANDONG END OF KHLRT FDR-2

KK-04 NP-9578-A 600 1200.0000 KHANDONG END OF KOPILI FDR-1

KK-05 NP-9488-A 500 2000.0000 KOPILI END OF MISA-1 FDR



KK-08 NP-9490-A 600 1200.0000 KOPILI END OF KHANDONG FDR-1

KK-09 NP-9580-A 25 300.0000 KHANDONG 33KV STN TRF

KK-10 NP-5775-A 50 1200.0000 KHANDONG 132/33KV ICT

KK-11 NP-9465-A 150 1200.0000 KHANDONG GT-1

KK-12 NP-9466-A 150 1200.0000 KHANDONG GT-2

KK-13 NP-9552-A 200 2000.0000 KOPILI GT-1

KK-14 NP-9551-A 200 2000.0000 KOPILI GT-2

KK-15 NP-9548-A 200 2000.0000 KOPILI GT-3

KK-16 NP-9550-A 200 2000.0000 KOPILI GT-4

KK-17 NP-9464-A 200 1200.0000 KOPILI GT-2 OF STG-2

KK-18 NP-6155-A 200 300.0000 LV SIDE OF 132/33KV TRF

KK-19 NP-9715-A 25 300.0000 KOPILI STG-2 33KV STN TRF

KK-20 NP-6154-A 200 300.0000 33KV DAMSITE FDR(NEEPCO)

KK-21 NP-9491-A 600 1200.0000 KOPILI END OF KHANDONG FDR-2

KK-22 NP-9576-A 600 1200.0000 KHANDONG END OF KOPILI FDR-2

KK-23 NP-9549-A 50 1200.0000 KOPILI 5 MVA STN TRF

KK-24 NP-9458-A 500 2000.0000 KOPILI END OF MISA-1 FDR (CHECK METER)



KK-27 NP-9461-A 500 2000.0000 KOPILI END OF KHANDONG FDR-1 (CHECK METER)

KK-28 NP-9462-A 500 2000.0000 KOPILI END OF KHANDONG FDR-2 (CHECK METER)

KK-29 NP-9573-A 600 1200.0000 KHANDONG END OF KOPILI 2-MAIN

KK-30 NP-9575-A 600 1200.0000 KHANDONG END OF KHLRT FDR-2-MAIN

KK-31 NP-9577-A 600 1200.0000 KHANDONG END OF KHLRT FDR-1-MAIN

KK-32 NP-9581-A 600 1200.0000 KHANDONG END OF HAFLONG FDR-MAIN

KK-33 NP-9579-A 600 1200.0000 KHANDONG END OF KOPILI FDR-1-MAIN

KK-34 NP-9467-A 200 1200.0000 KOPILI GT-2 OF STG-2

KK-35 NP-9463-A 25 300.0000 KOPILI STG-2 33KV STN TRF

KT-01 NP-9625-A 800 2000.0000 KATHALGURI END OF MARIANI FDR

KT-02 NP-9582-A 800 2000.0000 KATHALGURI END OF NEW MARIANI FDR

KT-03 NP-9597-A 150 2000.0000 KATHALGURI GT-1




52

LOCATION.ID

METER. NO

C.T. RATIO

P.T. RATIO







KT-12 NP-9594-A 50 2000.0000 KATHALGURI STN TRF-1

KT-13 NP-9593-A 50 2000.0000 KATHALGURI STN TRF-2

KT-14 NP-9566-A 400 2000.0000 KTG END OF 220kV DEOMALI FDR

KT-15 NP-9650-A 800 2000.0000 KTG END OF 220kV TINSUKIA -I

KT-16 NP-9443-A 800 2000.0000 KTG END OF 220kV TINSUKIA -II

KT-17 NP-9445-A 800 2000.0000 KTG END OF 220kV TINSUKIA -I (CHK METER)

KT-18 NP-9447-A 800 2000.0000 KTG END OF 220kV TINSUKIA -II (CHK METER)

KT-19 NP-9446-A 800 2000.0000 KATHALGURI END OF MARIANI FDR (CHK METER)

KT-20 NP-9567-A 800 2000.0000 KATHALGURI END OF NEW MARIANI FDR (CHK METER)

KT-21 NP-9444-A 400 2000.0000 KTG END OF 220kV DEOMALI FDR (CHK METER)

LO-01 NP-9065-A 400 1200.0000 LOKTAK END OF RENGPANG FDR

LO-02 NP-9064-A 400 1200.0000 LOKTAK END OF JIRIBAM-2 FDR

LO-03 NP-9044-A 400 1200.0000 LOKTAK END OF IMPHAL PG FDR

LO-04 NP-9045-A 400 1200.0000 LOKTAK END OF NINGTHOUKHONG FDR

LO-05 NP-9048-A 2500 100.0000 LOKTAK GT-1

LO-06 NP-9047-A 2500 100.0000 LOKTAK GT-2

LO-07 NP-9046-A 2500 100.0000 LOKTAK GT-3

LO-08 NP-9067-A 50 1200.0000 LOKTAK STN TRF

LO-09 NP-9511-A 400 1200.0000 LOKTAK END OF RENGPANG FDR-1 CHECK

LO-10 NP-9510-A 400 1200.0000 LOKTAK END OF JIRIBAM FDR-2 CHECK

LO-11 NP-9508-A 400 1200.0000 LOKTAK END OF IMPHAL FDR check

LO-12 NP-9509-A 400 1200.0000 LOKTAK END OF NINGTHOUKHONG FDR CHECK

ME-01 NP-8384-A 400 1200.0000 LUMSHNONG END OF PANCHGRAM FDR

ME-02 NP-6865-A 600 1200.0000 KHLRT(MeSEB) END OF KHLRT(PG) FDR-1

ME-03 NP-8474-A 400 1200.0000 UMTRU END OF KAHELIPARA-1

ME-04 NP-8475-A 400 1200.0000 UMTRU END OF KAHELIPARA-2

ME-05 NP-8491-A 400 1200.0000 UMTRU END OF S'SUJAI FDR-2

ME-06 NP-6881-A 300 1200.0000 KHLRT(PG) END OF KHLRT(MeSEB) FDR-1

ME-07 NP-8473-A 400 1200.0000 UMTRU END OF S'SUJAI FDR-1

ME-08 NP-6866-A 400 1200.0000 KHLRT(MeSEB) END OF KHLRT(PG) FDR-2

ME-09 NP-6880-A 600 1200.0000 KHLRT(PG) END OF KHLRT(MeSEB) FDR-2

ME-10 NP-6883-A 300 1200.0000 KHLRT (PG) END OF KHANDONG-1 FDR

ME-11 NP-6884-A 600 1200.0000 KHLRT (PG) END OF KHANDONG-2 FDR

ME-12 NP-6856-A 800 2000.0000 BYRNIHAT END OF 220KV MISA-I

ME-13 NP-5302-A 800 2000.0000 BYRNIHAT END OF 220KV MISA-II

ME-14 NP-8370-A 1000 3636.3636 BYRNIHAT END 400KV BONGAIGAON

ME-15 NP-8371-A 1000 3636.3636 BYRNIHAT END OF 400KV SILCHAR FDR II

ME-16 NP-9071-A 400 1200.0000 MENDIPATHAR END OF 132KV AGIA FDR

MN-01 NP-9706-A 400 1200.0000 IMPHAL(S) END OF IMPH PG FDR-III

MN-02 NP-9651-A 600 1200.0000 NINGTHOUKHONG END OF LOKTAK FDR

53

LOCATION.ID

METER. NO

C.T. RATIO

P.T. RATIO


MN-03 NP-9667-A 400 1200.0000 KARONG END OF KOHIMA FDR

MN-04 NE-0027-A 200 1200.0000 JIRIBAM (132/33KV TRF) CONSUMPTION-GIS

MN-05 NP-8378-A 800 1200.0000 IMPHAL PG END OF IMPHAL FDR-I

MN-06 NE-0039-A 800 1200.0000 132 kV JIRIBAM GIS END OF PLP FDR

MN-07 NE-0037-A 800 1200.0000 JIRIBAM GIS PG END OF TIPAIMUKH FDR (EARLIER AIZAWL)

MN-08 NP-9936-A 800 1200.0000 132 kV JIRIBAM GIS END OF HAFLONG FDR

MN-09 NE-0038-A 800 1200.0000 JIRIBAM END OF LOKTAK-2 FDR

MN-10 NP-9518-A 300 1200.0000 IMPHAL PG END OF NINTHONGKHONG

MN-11 NP-9512-A 400 1200.0000 RENGPANG END OF LOKTAK FDR

MN-12 NP-9523-A 200 1200.0000 132 kV JIRIBAM (PG) GIS END OF

MN-13 NP-9520-A 300 1200.0000 IMPHAL(PG) END ICT-1

MN-14 NP-9522-A 300 1200.0000 IMPHAL(PG) END ICT-2

MN-15 NP-9949-A 300 1200.0000 IMPHAL (PG) END OF LOKTAK-2

MN-16 NP-9519-A 300 1200.0000 IMPHAL (PG) END OF IMPHAL-II

MN-17 NP-9946-A 400 1200.0000 NINGTHOUKHONG END OF IMPHAL (PG)

MN-18 NP-9903-A 800 1200.0000 132 kV JIRIBAM(PG) GIS END OF BADARPUR

MN-19 NP-9902-A 200 1200.0000 JIRIBAM(MAN) END OF JIRIBAM(PG)FDR

MN-20 NP-8615-A TIPAIMUKH END OF AIZAWL

MN-21 NP-8618-A TIPAIMUKH END OF JIRIBAM

MN-22 NP-9689-A 600 1200.0000 IMPHAL(PG) END OF IMPHAL(MAN) -III

MN-23 NP-9546-A 600 1200.0000 IMPHAL(MAN) END OF IMPHAL(PG) -II

MN-24 NP-9547-A 2000 3636.3636 IMPHAL(PG) END OF THOUBAL-I

MN-25 NP-9543-A 2000 3636.3636 IMPHAL(PG) END OF THOUBAL-II

MN-26 NP-9982-A 3000 3636.3636 400 KV IMPHAL END OF NEW KOHIMA_1

MN-27 NP-9985-A 3000 3636.3636 400 KV IMPHAL END OF NEW KOHIMA_2

MN-28 NP-9668-A 1000 3636.3636 400 kV THOUBAL END OF IMPHAL(PG)-1

MN-29 NP-9603-A 1000 3636.3636 400 kV THOUBAL END OF IMPHAL(PG)-2

MZ-01 NP-8485-A 300 1200.0000 AIZAWL END OF MELRIAT FDR

MZ-02 NP-8504-A 300 1200.0000 AIZAWL END OF LUNGMUAL FDR

MZ-03 NP-2505-A 150 1200.0000 BAIRABI END OF 132kV KOLASIB FDR--REMOVED

MZ-04 NP-2501-A 75 1200.0000 HV SIDE OF 11/132kV TRF-1---REMOVED

MZ-05 NP-4134-A 75 1200.0000 HV SIDE OF 11/132kV TRF-2---REMOVED

MZ-06 NP-4133-A 25 1200.0000 HV SIDE OF 132/11kV TRF(BAIRABI)---REMOVED

MZ-07 NP-0445-A 75 600.0000 BWK END OF 132/66KV KOLASIB FDR---REMOVED

MZ-08 NP-8486-A 600 1200.0000 AIZAWL(PG) END OF KOLASIB FDR

MZ-09 NP-8503-A 300 1200.0000 AIZAWL(PG) END OF KUMARGHAT FDR

MZ-10 NP-8505-A 400 1200.0000 AIZAWL(PG) END OF TIPAIMUKH FDR (EARLIER JIRIBAM)

MZ-11 NP-8497-A 300 1200.0000 KOLASIB END OF BADARPUR(PG) FDR

MZ-12 NP-8496-A 600 1200.0000 KOLASIB END OF AIZAWL(PG) FDR

MZ-13 NP-9564-A 300 1200.0000 MELRIAT END OF AIZAWL(PG) FDR

MZ-14 NP-9563-A 300 1200.0000 MELRIAT END OF ZUANGTUI FDR

MZ-15 NP-9565-A 300 1200.0000 MELRIAT END OF SHIMUI I FDR

MZ-16 NP-9497-A 300 1200.0000 MELRIAT END OF SHIMUI II FDR

MZ-17 NP-9493-A 300 1200.0000 SHIMUI END OF MELRIAT I FDR

54

LOCATION.ID

METER. NO

C.T. RATIO

P.T. RATIO


MZ-18 NP-9496-A 300 1200.0000 SHIMUI END OF MELRIAT II FDR

MZ-19 NP-9557-A 600 1200.0000 MELRIAT END OF 132 KV SILCHAR-I FDR

MZ-20 NP-9494-A 600 1200.0000 MELRIAT END OF 132 KV SILCHAR-II FDR

NG-01 NP-9602-A 300 1200.0000 DIMAPUR(PG) END OF DIMAPUR(S) I FDR

NG-02 NP-9947-A 250 1200.0000 KOHIMA END OF KARONG FDR

NG-03 NP-6032-A 100 600.0000 DIMAPUR END OF 66 KV BOKAJAN FDR

NG-05 NP-9671-A 100 1200.0000 MOKOKCHUNG END OF DOYANG FDR

NG-06 NP-9673-A 250 2000.0000 DIMAPUR END OF MISA-1 FDR

NG-07 NP-9452-A 250 2000.0000 DIMAPUR END OF MISA-2 FDR

NG-08 NP-9675-A 300 1200.0000 DIMAPUR END OF 132kV BOKAJAN FDR

NG-09 NP-8802-A 600 1200.0000 DIMAPUR (LV SIDE) 220/132kV ICT-1

NG-10 NP-9598-A 300 1200.0000 DIMAPUR END OF IMPHAL FEEDER

NG-11 NP-5777-A 600 1200.0000 DIMAPUR(S)END OF DIMAPUR(PG) I LINE

NG-13 NP-6889-A 600 1200.0000 DIMAPUR (LV SIDE) 220/132kV ICT-2

NG-14 NP-9674-A 300 1200.0000 DIMAPUR END OF DOYANG-1 FDR

NG-15 NP-9469-A 300 1200.0000 DIMAPUR END OF DOYANG-2 FDR

NG-16 NP-8472-A 300 1200.0000 DIMAPUR (PG) END OF KOHIMA FDR

NG-17 NP-9649-A 600 1200.0000 DIMAPUR(PG) END OF DIMAPUR(S) II FDR

NG-18 NP-9687-A 600 1200.0000 DIMAPUR(S) END OF DIMAPUR(PG) II FDR

NG-19 NP-9699-A 400 1200.0000 KOHIMA END OF DIMAPUR(PG) FDR

NG-20 NP-9653-A 300 1200.0000 MOKOCHANG(STATE) END OF MOKOK(PG) FDR-1

NG-21 NP-9655-A 300 1200.0000 MOKOCHANG(STATE) END OF MOKOK(PG) FDR-2

NG-22 NP-6148-A 300 1200.0000 WOKHA (SANIS) END OF DOYANG FDR

NG-25 NP-9972-A 2000 3636.3636 400 kV NEW KOHIMA END OF NEW MARIANI FDR I

NG-26 NP-9973-A 2000 3636.3636 400 kV NEW KOHIMA END OF NEW MARIANI FDR II

NG-27 NP-9986-A 2000 3636.3636 400 kV ICT I KOHIMA SS

NG-28 NP-9988-A 1600 3636.3636 220 kV ICT I KOHIMA SS

NG-29 NP-9987-A 2000 3636.3636 400 kV ICT II KOHIMA SS

NG-30 NP-9989-A 1600 3636.3636 220 kV ICT II KOHIMA SS

NG-31 NP-9970-A 2000 3636.3636 400 kV NEW KOHIMA END OF IMPHAL FDR I

NG-32 NP-9971-A 2000 3636.3636 400 kV NEW KOHIMA END OF IMPHAL FDR II

NR-01 NP-8130-A 4000 3636.3636 800KV HVDC-POLE-I(BNC) AT AGRA-PG MAIN (NP-8134-A REP ON 201120)

NR-02 NP-8136-A 4000 3636.3636 800KV HVDC-POLE-I(BNC) AT AGRA-PG CHECK

NR-03 NP-8108-A 4000 3636.3636 800KV HVDC-POLE-II(BNC) AT AGRA-PG MAIN

NR-04 NP-8109-A 4000 3636.3636 800KV HVDC-POLE-II(BNC) AT AGRA-PG CHECK

NT-01 NP-9683-A 2000 3636.3636 NTPC END OF 400 KV NTPC(B'GAON)-B'GAON(PG)-1

NT-02 NP-9682-A 2000 3636.3636 NTPC END OF 400 KV NTPC(B'GAON)-B'GAON(PG)-2

NT-03 NP-9057-A 500 3636.3636 NTPC GTG-1

NT-04 NP-9056-A 500 3636.3636 NTPC TIE-TRF-1

NT-05 NP-9054-A 500 3636.3636 NTPC TIE-TRF-2

NT-06 NP-9055-A 500 3636.3636 NTPC ICT-2 HV SIDE

NT-07 NP-9073-A 300 100.0000 NTPC 11 KV SEC-A CONST. POWER

55

LOCATION.ID

METER. NO

C.T. RATIO

P.T. RATIO


NT-08 NP-9058-A 300 100.0000 NTPC 11 KV SEC-B CONST. POWER

NT-09 NP-5279-A 2000 60.0000 NTPC 6.6 KV E7 START-UP POWER

NT-10 NP-5826-A 2000 60.0000 NTPC 6.6 KV E8 START-UP POWER

NT-11 NP-9684-A 2000 3636.3636 NTPC END OF 400 KV NTPC(B'GAON)-B'GAON(PG)-1 LNT

NT-12 NP-9666-A 2000 3636.3636 NTPC END OF 400 KV NTPC(B'GAON)-B'GAON(PG)-2 LNT

NT-13 NP-5794-A 500 3636.3636 NTPC GTG-2

NT-14 NP-9681-A 1600 2000.0000 NTPC ICT-2 LV SIDE

NT-15 NP-9623-A 2000 60.0000 NTPC 3 UA

NT-16 NP-9627-A 2000 60.0000 NTPC 3 UB

NT-17 NP-9685-A 1600 2000.0000 NTPC ICT-2 LV SIDE CHECK

NT-18 NP-9695-A 500 3636.3636 NTPC U-3 GT

NT-19 NP-9645-A 500 3636.3636 NTPC ICT-1 HV SIDE MAIN

NT-20 NP-9646-A 500 3636.3636 NTPC ICT-1 HV SIDE CHECK

NT-21 NP-9643-A 1600 2000.0000 NTPC ICT-1 LV SIDE MAIN

NT-22 NP-9644-A 1600 2000.0000 NTPC ICT-1 LV SIDE CHECK

PA-01 NP-9607-A 400 1200.0000 132KV PARE-NIRJULI(LEKHI)

PA-02 NP-9542-A 400 1200.0000 132KV PARE-NIRJULI CHECK

PA-03 NP-9409-A 400 1200.0000 132KV PARE-RHEP CKT1

PA-04 NP-9410-A 400 1200.0000 132KV PARE-RHEP CKT1 CHECK

PA-05 NP-9411-A 400 1200.0000 132KV PARE-ITANAGAR

PA-06 NP-9412-A 400 1200.0000 132KV PARE-ITANAGAR CKT1 CHECK

PA-07 NP-9538-A 400 1200.0000 132KV PARE-RHEP CKT II

PA-08 NP-9539-A 400 1200.0000 132KV PARE-RHEP CKT II CHECK

PA-09 NP-9540-A 100 1200.0000 132KV PARE- ST

PA-10 NP-9554-A 400 1200.0000 132KV PARE- UNIT I

PA-11 NP-9541-A 400 1200.0000 132KV PARE- UNIT II

PL-01 NP-7583-A 1000 3636.3636 PALATANA END OF SLCHAR I FDR

PL-02 NP-6855-A 1000 3636.3636 PALATANA END OF SLCHAR II FDR

PL-03 NP-9470-A 800 1200.0000 PALATANA END OF UDAIPUR I FDR

PL-04 NP-8381-A 1600 1200.0000 PALATANA END OF SM NAGAR FDR

PL-05 NP-5799-A 500 3636.3636 PALATANA GTG I

PL-06 NP-9471-A 500 3636.3636 PALATANA GTG II

PL-07 NP-7600-A 500 3636.3636 PALATANA STG I

PL-08 NP-9472-A 500 3636.3636 PALATANA STG II

PL-09 NP-8382-A 500 3636.3636 PALATANA ICT (HV Side)

PL-10 NP-7602-A 125 1200.0000 PALATANA ST I

PL-11 NP-7584-A 125 1200.0000 PALATANA ST II

PL-12 NP-8577-A 600 60.0000 PALATANA BLOCK II AUX (GB COMPRESSOR)

PL-13 NP-8579-A 1250 60.0000 PALATANA BLOCK II AUX (2CA)

PL-14 NP-8583-A 1250 60.0000 PALATANA BLOCK II AUX (2CB)

PL-15 NP-8573-A 500 3636.3636 PALATANA ICT-2 HV SIDE

PL-16 NP-9558-A 1000 3636.3636 PALATANA END OF SLCHAR I FDR (CHECK METER)

PL-17 NP-9560-A 1000 3636.3636 PALATANA END OF SLCHAR II FDR (CHECK METER)

PL-18 NP-9559-A 800 1200.0000 PALATANA END OF UDAIPUR I FDR (CHECK METER)

56

LOCATION.ID

METER. NO

C.T. RATIO

P.T. RATIO


PL-19 NP-9561-A 1600 1200.0000 PALATANA END OF SM NAGAR FDR (CHECK METER)

PL-20 NP-9944-A 1000 3636.3636 PALATANA END OF 400 kV SM NAGAR (STERLITE)-1

PL-21 NP-9977-A 1000 3636.3636 PALATANA END OF 400 kV SM NAGAR (STERLITE)-2

PL-22 NE-0013-A 1000 3636.3636 PALATANA END OF 400 kV SM NAGAR (STERLITE)-1 CHECK

PL-23 NE-0014-A 1000 3636.3636 PALATANA END OF 400 kV SM NAGAR (STERLITE)-2 CHECK

RN-01 NP-5792-A 500 1200.0000 RANGANADI END OF 132kV PARE MAIN FDR-1

RN-02 NP-6033-A 1000 3636.3636 RANGANADI END OF 400KV BNC-1

RN-03 NP-5817-A 1000 3636.3636 RANGANADI END OF 400KV BNC-2

RN-04 NP-5277-A 1000 1200.0000 RANGANADI GT-1



RN-07 NP-5276-A 250 1200.0000 RANGANADI STN.TFR-1

RN-08 NP-5815-A 250 1200.0000 RANGANADI STN.TFR-2

RN-09 NP-9555-A 1000 1200.0000 RANGANADI 400/132KV AUTO TFR-1(removed)

RN-10 NP-5275-A 1000 1200.0000 RANGANADI 400/132KV AUTO TFR-2

RN-11 NP-5278-A 500 1200.0000 RANGANADI END OF 132KV ZIRO FDR

RN-12 NP-5816-A 100 300.0000 RANGANADI END OF 33KV PARE-2

RN-13 NP-9429-A 1000 3636.3636 RANGANADI END OF 400KV BNC-1 CHECK

RN-14 NP-9430-A 1000 3636.3636 RANGANADI END OF 400KV BNC-2 CHECK

RN-15 NP-9428-A 500 1200.0000 RANGANADI END OF 132 KV PARE-1 CHECK

RN-16 NP-9556-A 500 1200.0000 RANGANADI END OF 132 KV ZIRO CHECK

RN-17 NP-9432-A 100 300.0000 RANGANADI END OF 33KV PARE-2 CHECK

RN-18 NP-9439-A 1000 1200.0000 RANGANADI END OF 132 KV PARE-2

RN-19 NP-9440-A 1000 1200.0000 RANGANADI END OF 132KV PARE-2 CHECK

RN-20 NP-9441-A 1000 1200.0000 RANGANADI END OF 132 KV CHIMPU

RN-21 NP-9442-A 1000 1200.0000 RANGANADI END OF 132KV CHIMPU CHECK

TR-01 NP-6850-A 800 1200.0000 AGARTALA END OF AGTPP-1 FDR

TR-02 NP-6851-A 800 1200.0000 AGARTALA END OF AGTPP-2 FDR

TR-03 NP-6875-A 800 1200.0000 P'KANCHANBARI END OF K'GHAT(PG) FDR

TR-04 NP-6860-A 600 1200.0000 K'GHAT(PG) END OF P'KANCHANBARI FDR

TR-05 NP-0369-A 25 1200.0000 K'GHAT 5MVA ICT----REMOVED

TR-06 NP-6892-B 400 1200.0000 DHARMANAGAR END OF DULLAV FDR

TR-07 NP-4137-A 75 1200.0000 ROKHIA GT-5---REMOVED

TR-08 NP-4136-A 75 1200.0000 ROKHIA GT-6---REMOVED

TR-09 NP-6861-A 300 1200.0000 K'GHAT END OF AZL FEEDER

TR-10 NP-6862-A 400 1200.0000 K'GHAT (PG)END OF KARINGANJ FEEDER

TR-11 NP-6863-A 600 1200.0000 K'GHAT END OF AGTPP FDR

TR-12 NP-4138-A 300 600.0000 BARAMURA GT-4---REMOVED

TR-13 NP-8471-A 1000 1200.0000 SM NAGAR END OF PALATANA

TR-14 NP-8470-A 400 1200.0000 UDAIPUR END OF PALATANA

TR-15 NP-9709-A 300 1200.0000 PK'BARI END OF 132 KV SILCHAR-1

TR-16 NP-9710-A 300 1200.0000 PK'BARI END OF 132 KV SILCHAR-2

TR-17 NP-9076-A 1000 1200.0000 SJM'NAGAR END OF 132 KV COMILLA-1

TR-18 NP-9078-A 1000 1200.0000 SJM'NAGAR END OF 132 KV COMILLA-2

57

LOCATION.ID

METER. NO

C.T. RATIO

P.T. RATIO


TR-19 NP-9077-A 800 1200.0000 COMILLA END OF 132 KV SJM'NAGAR-1

TR-20 NP-9083-A 800 1200.0000 COMILLA END OF 132 KV SJM'NAGAR-2

TR-21 NP-9933-A 800 1200.0000 132 KV PK BARI (TSECL) END OF AGTPP-1

TR-22 NP-9932-A 800 1200.0000 132 KV PK BARI (TSECL) END OF AGTPP-2

TR-23 NP-9919-A 800 1200.0000 132 KV PK BARI (TSECL) END OF PK BARI (STERLITE)

TR-24 NP-9931-A 800 1200.0000 132 KV PK BARI (STERLITE) END OF PK BARI (TSECL)

TR-25 NP-9930-A 800 1200.0000 132 KV PK BARI (STERLITE) END OF AMBASSA(TSECL)

TR-26 NP-9990-B 400 1200.0000 132 KV AMBASSA(TSECL) END OF PK BARI (STERLITE)

TR-27 NP-9943-A 600 1200.0000 132 kV BUDHJUNGNAGAR (TSECL) END OF SM NAGAR (STERLITE)

TR-28 NP-9893-A 800 1200.0000 132 kV SM NAGAR (STERLITE) END OF BUDHJUNGNAGAR (TSECL)

TR-29 NP-9890-A 800 1200.0000 132 kV SM NAGAR (STERLITE) END OF SM NAGAR (TSECL)

TR-30 NP-9942-A 600 1200.0000 132 kV SM NAGAR (TSECL) END OF SM NAGAR (STERLITE)

TR-31 NP-9975-A 2000 3636.3636 400 kV SM NAGAR (STERLITE) END OF PALATANA 1

TR-32 NP-9976-A 2000 3636.3636 400 kV SM NAGAR (STERLITE) END OF PALATANA 2

TR-33 NP-9969-A 50 300.0000 33 kV SM NAGAR (STERLITE) TERTIARY ICT LV SIDE

TR-34 NP-9909-A 50 300.0000 33 kV PK BARI (STERLITE) TERTIARY ICT LV SIDE

WR-01 NP-2657-A 1000 3636.3636 KORBA END OF KORBA-VINDYACHAL

WR-02 NP-2174-A 1000 3636.3636 KORBA END OF KORBA-VINDYACHAL - II

ZZ-01 NP-9544-A 400 1200.0000 IMPHAL(S) END OF IMP(PG)-I FDR

ZZ-02 NP-9948-A 400 1200.0000 YUREMBAM END OF NINGTHOUKHONG FDR

ZZ-03 NP-5300-A 1000 3636.3636 MISA 400/220KV ICT-1(HV SIDE)

ZZ-04 NP-9448-A 800 2000.0000 DIMAPUR (HV SIDE) 220/132kV ICT1

ZZ-05 NP-5282-A 1200 2000.0000 BALIPARA 400/220KV(LV) ICT

ZZ-06 NP-8594-A 1000 3636.3636 BALIPARA END OF MISA FDR-1 (PREVIOUS-5790)

ZZ-07 NP-5285-A 1000 3636.3636 BALIPARA END OF MISA FDR-2

ZZ-08 NP-5774-A 1200 2000.0000 BONG 400/220KV(LV) ICT-1

ZZ-09 NP-8477-A 600 1200.0000 KHLRT(PG) END OF BADARPUR(PG) FDR

ZZ-10 NP-8662-A 500 1200.0000 SILCHAR END OF BADARPUR(PG)-I

ZZ-11 NP-8663-A 500 1200.0000 SILCHAR END OF BADARPUR(PG)-II

ZZ-12 NE-0008-A 1200 2000.0000 MISA 400/220KV ICT-2(LV SIDE) (EARLIER NP-8638-A)

ZZ-13 NP-9498-A 300 1200.0000 IMPHAL (PG) END OF DIMAPUR

ZZ-14 NP-9672-A 800 1200.0000 DIMAPUR (HV SIDE) 220/132kV ICT2

ZZ-15 NP-9475-A 2000 3636.3636 BONGAIGAON END OF 400 KV BALIPARA-3

ZZ-16 NP-8655-A 1000 3636.3636 BALIPARA END OF 400 KV BONGAIGAON-1




ZZ-20 NE-0007-A 2000 3636.3636 SILCHAR END OF 400 KV IMPHAL-1 (EARLIER NP-8571-A)

58

LOCATION.ID

METER. NO

C.T. RATIO

P.T. RATIO


ZZ-21 NE-0040-A 2000 3636.3636 SILCHAR END OF 400 KV IMPHAL-2 (EARLIER NP-8570-A)

ZZ-22 NP-4519-A 300 1200.0000 IMPHAL (PG) END OF 132 KV SILCHAR-1

ZZ-23 NP-4504-A 300 1200.0000 IMPHAL (PG) END OF 132 KV SILCHAR-2 REMOVED

ZZ-24 NP-9399-A 500 1200.0000 SILCHAR END OF 132 KV PK'BARI-1

ZZ-25 NP-8563-A 500 1200.0000 SILCHAR END OF 132 KV PK'BARI-2

ZZ-28 NP-4524-A 800 2000.0000 MARIANI(PG) END OF 220 KV MOKOK-1

ZZ-29 NP-4509-A 800 2000.0000 MARIANI(PG) END OF 220 KV MOKOK-2

ZZ-30 NP-4510-A 800 2000.0000 MOKOKCHANG END OF 220 KV MARIANI(NEW)-1

ZZ-31 NP-4516-A 800 2000.0000 MOKOKCHANG END OF 220 KV MARIANI(NEW)-2

ZZ-32 NP-9923-A 150 1200.0000 220/132KV 30 MVA ICT-1 AT MOKOKCHANG LV-SIDE

ZZ-33 NP-9938-A 300 1200.0000 220/132KV 30 MVA ICT-2 AT MOKOKCHANG LV-SIDE

ZZ-34 NP-9454-A 2000 3636.3636 BONGAIGAON END OF 400 KV BALIPARA-4

ZZ-35 NP-7799-A 600 1200.0000 BADARPUR END OF 132 KV KARIMGANJ

ZZ-36 NP-9486-A 1000 3636.3636 BALIPARA END OF 400 KV BNC CKT 3

ZZ-37 NP-9484-A 1000 3636.3636 BALIPARA END OF 400 KV BNC CKT 4

ZZ-38 NP-9634-A 2000 3636.3636 400 KV IMPHAL-SILCHAR II

ZZ-39 NP-9636-A 2000 3636.3636 400/132 KV 315 MVA IMPHAL H.V SIDE ICT-I

ZZ-40 NP-9635-A 1600 1200.0000 400/132 KV 315 MVA IMPHAL L.V SIDE ICT-I

ZZ-41 NP-9637-A 2000 3636.3636 400 KV IMPHAL-SILCHAR I

ZZ-42 NP-9633-A 2000 3636.3636 400/132 KV 315 MVA IMPHAL H.V SIDE ICT-II

ZZ-43 NP-9545-A 1600 1200.0000 400/132 KV 315 MVA IMPHAL L.V SIDE ICT-II

ZZ-44 NP-6946-A 600 3636.3636 HV SIDE OF SIL ICT-3

ZZ-45 NP-9917-A 2000 3636.3636 PK BARI (STERLITE) END OF 400 kV SM NAGAR (STERLITE) I

ZZ-46 NP-9918-A 2000 3636.3636 PK BARI (STERLITE) END OF 400 kV SM NAGAR (STERLITE) II

ZZ-47 NP-9978-A 2000 3636.3636 SM NAGAR (STERLITE) END OF 400 kV PK BARI (TERLITE) I

ZZ-48 NP-9979-A 2000 3636.3636 SM NAGAR (STERLITE) END OF 400 kV PK BARI (TERLITE) II

ZZ-49 NP-9905-A 2000 3636.3636 400/132 kV PK BARI(STERLITE) ICT-1 HV SIDE

ZZ-50 NP-9906-A 1600 1200.0000 400/132 kV PK BARI(STERLITE) ICT-1 LV SIDE

ZZ-51 NP-9907-A 2000 3636.3636 400/132 kV PK BARI(STERLITE) ICT-2 HV SIDE

ZZ-52 NP-9908-A 1600 1200.0000 400/132 kV PK BARI(STERLITE) ICT-2 LV SIDE

ZZ-53 NP-9965-A 2000 3636.3636 400/132 kV SM NAGAR (STERLITE) ICT-1 HV SIDE

ZZ-54 NP-9966-A 1600 1200.0000 400/132 kV SM NAGAR (STERLITE) ICT-1 LV SIDE

ZZ-55 NP-9967-A 2000 3636.3636 400/132 kV SM NAGAR (STERLITE) ICT-2 HV SIDE

ZZ-56 NP-9968-A 1600 1200.0000 400/132 kV SM NAGAR (STERLITE) ICT-2 LV SIDE

ZZ-57 NP-9925-A 3000 3636.3636 400/132 SILCHAR-MISA FEEDER-1

ZZ-58 NP-9896-A 3000 3636.3636 400/132 SILCHAR-MISA FEEDER-II

ZZ-59 NP-7799-A 600 1200.0000 132 kV BADARPUR END OF KAMRIMGANJ

ZZ-60 NP-6862-A 400 1200.0000 132 kV KUMARGHAT END OF KAMRIMGANJ

ZZ-61 NP-9916-A 2000 3636.3636 PK BARI (STERLITE) END OF 400 kV SILCHAR I

59

LOCATION.ID

METER. NO

C.T. RATIO

P.T. RATIO


ZZ-62 NP-9901-A 2000 3636.3636 SILCHAR END OF 400 PK BARI (STERLITE)I

ZZ-63 NP-9899-A 2000 3636.3636 SILCHAR END OF 400 PK BARI (STERLITE) II

ZZ-64 NP-9915-A 2000 3636.3636 PK BARI (STERLITE) END OF 400 kV SILCHAR II

ZZ-65 NP-9952-A 3000 3636.3636 NEW MARIANI END OF 400 KV MISA CKT-1

ZZ-66 NP-9954-A 3000 3636.3636 NEW MARIANI END OF 400 KV MISA CKT-2

ZZ-67 NP-9914-A 1600 2000.0000 220KV NEW MARIANI BAY 1

ZZ-68 NP-9953-A 1600 2000.0000 220KV NEW MARIANI BAY 2

FICTMETERS

Sl. No. Fict-Meter Meter Formula Total

Meters

1

(AR-51) +(AR-01) +(AR-02) -(AR-06) +(AS-55) +(KT-14) +(RN-12) +(PA-01) +(AR-03) +(PA-05) -(AR-09) -(AR-19) -(AR-20)

12

2 (AS-51)

-(AS-01) -(AS-02) -(AS-03) -(AS-04) -(AS-06) -(AS-07) -(AS-08)-(AS-09) +(AS-11) +(AS-12)-(AS-13) -(AS-17) -(AS-18) +(AS-30) +(AS-31) +(AS-42) -(AS-47)*1.0309 -(AS-50) +(AS-56) +(AS-57) -(AS-77) -(AS-78) -(AS-63) +(MN-06) +(KT-15) +(KT-16) -(AS-80) -(AS-79) -(AS-73) -(AS-86) -(AS-93) -(AM-01) +(KK-32) +(AS-69) -(AM-12) -(AM-13) -(NT-14) -(NT-22) -(AM-53) -(AM-54)

40

3 (MN-51) - (MN-23) - (MN-03) + (MN-04) + (MN-12) + (LO-01) + (LO-04) + (MN-10) - (ZZ-01) + (MN-13) + (MN-14) +(MN-22)

11

4 (ME-51) -(ME-01) -(ME-03) -(ME-04) -(ME-15) -(ME-02) -(ME-08) -(ME-14) -(ME-16) +(AS-70) +(AS-72) +(AS-50) +(AS-09)

12

5 (MZ-51) + (MZ-14) + (MZ-02) - (MZ-11) - (MZ-12) 4

6 (NG-51) -(NG-11) -(AS-12) +(MN-03) +(DY-04) +(AS-47) -(NG-19) +(NG-17) -(NG-20) -(NG-21) -(DY-03)

10

7 (TR-51) -(TR-01) -(TR-02) +(TR-04) -(TR-06) +(PL-18) -(TR-13) -(TR-21) -(TR-22) +(TR-24) +(TR-25) +(TR-28) +(TR-29)

12

8 (BN-51) +(AM-14) +(AM-23) 2

9 (TO-51) + (AR-51) + (AS-51) + (MN-51) + (ME-51) + (MZ-51) +(NG-51) + (TR-51) + (BN-51)

8

10 (LO-71) + (LO-01) + (LO-02) + (LO-03) + (LO-04) 4

11 (KD-71) + (KK-29) + (KK-30) + (KK-31) + (KK-32) + (KK-33) 5

12 (KP-71) + (KK-05) + (KK-06) + (KK-07) +(KK-08) + (KK-21) 5

13 (KT-71) + (KT-01) + (KT-02) + (KT-14) + (KT-15) + (KT-16) 5

14 (AG-71) +(AG-01) +(AG-02) +(AG-03) +(AG-16) +(AG-17) 5

15 (DY-71) + (DY-01) + (DY-02) - (DY-03) + (DY-04) 4

60

Sl. No. Fict-Meter Meter Formula Total

Meters

16 (RN-71) + (RN-01) + (RN-02) + (RN-03) + (RN-11) + (RN-18) + (RN-20) 6

17 (PL-71) +(PL-16) +(PL-17) +(PL-18) +(PL-19) +(PL-20) 5

18 (PA-71) +(PA-01) +(PA-03) +(PA-05) +(PA-07) 4

19 (NT-71) +(NT-01) +(NT-02) -(NT-14) -(NT-22) 4

20 (KM-71) +(KA-01) +(KA-03) +(KA-05) 3

21 (TO-71) + (LO-71) + (KD-71) + (KP-71) + (KT-71) + (AG-71) + (DY-71) + (RN-71) + (PL-71) + (PA-71) + (NT-71) +(KM-71)

11

22 (NR-51) - (AM-08) - (AM-22) - (AM-24) - (AM-25) 4

23 (ER-51) -(AS-25) -(AS-26) +(ER-05) -(AS-33) -(AS-34) +(ER-08) -(AS-96) -(AS-97)

8

61

SECTION-3:

PROCESSING AND COMPUTATION OF

DATA

62

The figure below shows a typical arrangement for collecting data from Special Energy Meters (SEM) using Data Collecting Device (DCD). The DCD is connected to the SEM through two interconnected cables: 1. Data cable 2. Optical cable

3.1.1 Data Collection from SEM through DCD

DCD (Data Collecting Device) is used for collection of data from Special Energy Meters. Optical port of meter is the interface between SEM and DCD for data tapping from meter memory. Optical cord is used for coupling DCD to the optical port of SEM which is circular for L&T meters and rectangular in case of Secure make SEMs. Suitable software is provided with DCD to enable data collection from SEMs and dumping the same to PC.

Optical port of SEM and DCD with connecting cords is shown in figure below.

Special

Energy Meter

Optical

Cable Data

Cable

Data Collecting

Device (DCD)

3.1 Data Collection from Meters

63

Optical Port in SEM DCD with connecting cords There are two models of DCD:

1. The model with only numeric keys and control keys (17 keys) known as POS296

model (PSION) – This model is already outdated and is not being discussed. 2. The model with full alphanumeric keys and control keys (45 keys) known as XP

model (Analogic). All DCD related procedures discussed in this manual pertains to analogic DCD. For downloading data from SEM to DCD and subsequently dumping the same

from DCD to PC following procedure is carried out: 3.1.1.1 Data tapping from Meter to DCD

Step 1: Connect the AC to DC Adapter (9 Volt) to DCD / MRI (Meter Reading Instrument)

Step 2: Connect the Data cable with DCD/MRI

Data cables are of two types:

1. D-Type Cable:

Having 9-pin connectors at both ends. (The round shaped male end being connected to DCD).

2. RJ-11 Cable: Having 9-pin female connector at one end and RJ-11 (Telephone jack) at other end (connected to DCD).

Step 3: Connect 9-pin female connector of the data cable with 9-pin male connector of the

optical cord.

Step 4: Place the other end of Optical cord to the optical sensor/port of the SEM.

Step 5: DCD is switched ON by Pressing “POWER RESUME” key for few seconds.

64

Step 6: DCD will be powered up & following menu will appear in the DCD screen

Step 7: Press “D” for collecting data from SEM. DCD will display the following message

• While making connection with DCD

• While collecting data

• After successful completion of data collection

Step 8: To come back to main menu of DCD, press “Enter”.

Step 9: Decouple the optical cord from the SEM optical port and disconnect optical cord

from the data cable. Then DCD will be with data cable only for dumping of data from DCD to PC.

3.1.1.2 Data dumping from DCD to PC by “Vincom” software for L&T meters:

Step 1: To connect DCD with local PC, plug in 9-pin female connector of the data cable to 9-pin serial port of the local PC.

Step 2: The operations should be started from Computer.

Step 3: Open “Vincom” with appropriate login ID and password.

Step 4: Select “Collect Data” option in “MRI” and following screen will appear.

Wait

Data Collected

***** Bytes Received

Press Enter

D : Collect Selected Data

U : PC Communication

P : Programming Mode

O : Memory Status Check

R : Accuracy Test

Receiving ……

Preselected data

***** Bytes

65

Step 5: Click on “Collect Data” option and following window will appear.

Step 6: Press “U” key in DCD for PC communication and following screen will appear in DCD display.

• While communicating PC with DCD

Step 7: Enter Collector Name and click on “Collect” button. Following screen will appear in “Vincom” software.

Waiting for

Data Request

66

The data file will be saved in a sub-folder named “Data” in “Vincom” folder of the particular directory where the software (Vincom) is installed. Data will be saved in a file with the following naming format:

yyyyMMddhhmmss.dat

where, yyyy = Year, MM = Month, dd = Date, hh = Hour,

mm = Minutes and ss = seconds

For Example, if data is downloaded on 04/06/08 at 15:30:15Hrs, it will be stored as 20080604153015.dat Note: Automatic naming of data file while downloading without asking for user defined file name is creating operational/processing problems. Matter is being taken up with L&T for rectification.

While downloading data from DCD to PC following screen will appear in DCD display

Step 8: After completion of Dumping, DCD will display

and “Vincom” will show the following screen:

Data Dumped

***** Bytes

Clearing DCD

67

Step 9: Press “Enter” key in DCD to go to the main menu and click on “OK” button in

“Vincom” Step 10: Click on Close button to exit from “Vincom” and click on “Yes” option at the

confirmation prompt.

Step 11: To switch off the DCD press “POWER RESUME” key for few seconds until the barline on the DCD screen is completely erased. Otherwise, DCD goes to safe mode and battery is also drained progressively.

68

3.1.1.3 Data dumping from DCD to PC by “Vinplus” software for L&T meters:



Step 3: Open “Vinplus” with appropriate login ID and password.

Step 4: Select “MRI Config” option under “Configuration” menu and following screen

will appear. For first time downloading this configuration setting is necessary.

69

Step 5: Click on “Select the file for editing” option and select the *.XML file from the directory “C:\Program Files\LnT\Vinplus\MRI Configuration.XML” and following window will appear.

Step 6: Click on “Data File Path” and “Result File Path” option and select the folder from the directory “C:\Program Files\LnT\Vinplus\Convert\Done” and following window will appear.

Step 7: Select “Delete data after reading” and click on “Save” option.

70

Step 8: Click on “Close” option.

Step 9: Click on “Read MRI” option under “Read Data” and separate window will appear.

Step 09: Select “Read API-II” from dropdown menu under “API Type” option.

71

Step 10: Select the same configuration file from “Select Config File” from dropdown menu under “API Type” option. Then click on “Clear Grid” option.

Step 11: Then click on “Commands” option.

72

Step 12: Then separate window will appear and following meter data will transfer from DCD to PC.

73

Step 13: Click on “Send” option and following window will appear.

Step 14: After completion of data sending, click on “Close” option.

74

Step 15: Raw data *.MDT file will save in “C:\Program Files\LnT\Vinplus\Convert \Done” directory.

3.1.1.4 Data dumping from DCD to PC by “Smartgrid” software for SML meters



Step 3: Open “Smartgrid” with appropriate login id and password.

Step 4: Select “MRI Communication” option in “MRI” and following screen will appear

75

Step 5: Click on “MRI Communication” option in “Smartgrid” and following window will appear on the screen.

Step 6: Press “U” key in DCD for PC communication and following screen will appear in

DCD display:

• While communicating PC with DCD

Step 7: Click on “Read MRI” option and following window will appear on the screen:

Waiting for

Data Request

76

Now click on “Yes” option for data dumping.

The data file will be saved in a sub-folder named “Data” in “Smartgrid” folder of the particular directory where the software (Smartgrid) is installed. Data will be saved in a file with the following naming format:

ddmmyyno.MRI

where, dd = Date, mm = month, yy = Year and

no = Two digit numeric code.

For example, the first and third readings dumped to PC on 01/05/08 will be stored as 01050801.MRI and 01050803.MRI respectively. Note: Automatic naming of data file while downloading without asking for user defined file name is creating operational/processing problems. Earlier, in case of PSION type DCD, there used to be a prompt asking for user defined file name. While downloading data from DCD to PC following screen will appear in DCD display

Step 8: After completion of Dumping, DCD will display

Step 9: Press “Enter” key in DCD to go the main menu.

Step 10: Click on Close button to exit from “Smartgrid”.

Data Dumped

***** Bytes

Clearing DCD

77

Step 11: To switch off the DCD press “POWER RESUME” key for few seconds until the barline on the DCD screen is completely erased. Otherwise, DCD goes to safe mode and battery is also drained progressively.

.

78

3.1.1.5 Sending Data from Metering Locations to RLDC

Step 1: Attach the appropriate *.MRI or *.dat or *.MDT file from sub-folder “Data” of “Smartgrid” or “Vincom” or “Vinplus” folder in an e-mail message.

Step 2: e-mail the message to [email protected] or [email protected].

mailto:[email protected]

79

RS-485 scheme facilitates automatic data downloading from all the meters in a location to a local PC. RS-485 standard is a balanced data transmission scheme with two wire connectivity (having ground). L&T make SEMs are RS-485 compatible having DATA (+), DATA (-) & GROUND terminals in its RS-485 terminal block. However, as RS-232 (serial binary data communication) is used in Computer serial ports, RS-485 to RS-232 converter is required for communication between a meter and PC. RS-232/9 pin serial port of PC is connected with RS-232 port of converter and RS-485 port of converter is connected with the RS-485 terminals of SEM. The following connection diagram shows four meters connected in parallel to a PC using RS-485 scheme of data communication. A write up on RS-485 / RS-232 is enclosed as Annexure-I

Terminal block of L&T make SEM showing CT, PT, RS-485 connectivity.

R Phase

PT lead

B Phase CT leadY Phase CT lead

R Phase

CT lead

Y Phase

PT lead

B Phase PT

lead

Neutral lead

RS485-Ground

RS485-DATA(-)

RS485-

DATA(+)

RS 232

D +

D -

RS 232 to RS 485

Converter

Substation PC

Special Energy Meter

3.2 Data Collection from SEM through RS-485 Scheme

80

3.2.1 Data Collection through RS-485

Ensure the connection arrangement of meters, converter and PC as shown in above figure. Step 1: Open the “Vincom” software with appropriate login ID and password. Step 2: Select “Remote Meter” and click on “Scheduler”. Scheduler is a template to collect metered data in a predefined manner. Normally, a scheduler contains all the meters connected to the local PC through converter. Scheduler is configured beforehand by allocating unique Slave IDs to each meters and collection time.

Step 3: After clicking on “Scheduler”, a separate window will appear. Select appropriate scheduler templates & click on “Start Scheduler” option to initiate the data collection from meters.

81

Metered data will be collected in a sequence as defined in the scheduler. While collecting data from a meter, all fields against that particular meter will be displayed in blue colour on the scheduler screen. On successful data collection, the fields will turn green. Otherwise, the fields will turn from blue to red. Scheduler will temporarily skip the said meter and proceed with data collection from other meters in the list. Thereafter, scheduler will make repeated (pre-defined) attempts to collect data from the meters skipped earlier. However, if Scheduler fails to collect data of any meter even after repeated attempts, it will stop. Generally it can happen if a particular meter is powered off; in such a case external 63.5V single phase supply is to be provided to the meter before running scheduler for data collection. The resultant *.DAT file will contain data of all the meters which could successfully communicate with the Scheduler.

Step 4: All metered data will create a single *.DAT file and save in “Vincom” folder of

local PC by default.

Step 5: Close the window and exit from “Vincom” by Logging out.

Step 6: Attach *.DAT file and e-mail it to [email protected] or [email protected].

82

Special Energy Meters were installed in NER during 1995-96. For past 12 years, data collection from meters through DCD as well as data transmission to RLDC from metering locations through internet is being carried out manually. Automating both the activities, i.e., data collection from the meter and data transmittal to RLDC would help in total elimination of manual intervention in the entire chain of activity. 3.3.1 Automatic Data collection Implementation of RS-485 scheme would enable automatic data collection from all meters in a location to the local PC. In NER, RS-485 is in place in 400/220KV Misa substation of POWERGRID. By end of 2008, the scheme will be implemented in all NER metering locations having more than two SEMs.

3.3.2 Automatic Data Transmission Meter data stored in PC at the metering locations can be automatically transmitted to RLDC using dedicated communication system like VSAT, OFC etc. A schematic of automatic data transmission system being implemented by ASEB is as below:

Automatic Meter Data Transmission Schematic in Assam System of NER

In NER, the possibility of automatic data transmission utilising wideband communication network of ULDC or GSM network is being explored. As all POWERGRID substations are getting connected through WAN shortly, automatic data transmission from all POWERGRID locations could also be possible through WAN.

Metering architecture of ASEB for Intra-State ABT

Meter

Data

Concentrator

Data

ConcentratorMeter Meter

Ethernet Switch

Local PCLocal Online

Monitoring

Meter

Wideband

communicationSLDC

3.3 Automating Meter data Collection / Transmission

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In this section all activities have been discussed in details, sequentially, starting with receipt of SEM data at NERLDC till sending processed meter data to NERPC for computation and issuance of weekly Unscheduled Interchange (UI) Account as well as Reactive Energy Account.

Further, in the concluding part of this section, a brief on post processing activities and data archival has also been covered.

Meter data (*.mri, *.RM3*.dat and *.MDT files) downloaded at various locations of NER are electronically sent to NERLDC through e-mail. First activity pertaining to meter data begins after receipt of these data at NERLDC preferably by Tuesday of every week. The data are viewed and checked to ensure that data of every meter under the jurisdiction of a particular location have been collected as per stipulated time frame. Initially, received meter data in binary format (*.mri in case of Secure Meters and *.dat or *.MDT in case of L&T Meters) is temporarily stored in a directory for viewing / checking. Following naming format is used in case of binary files:

ddmmXXX.mri ddmmXXX.dat ddmmXXX.mdt ddmmXXX.RM3

where, ddmm is date and month of collecting data

XXX is three letter code for the location

For example, data collected at Jiribam on 05-05-2008 (Monday) is named as 0505JBM.mri. As data is to be collected on every MONDAY, ddmm naming corresponding to Monday is done even if data is collected on Tuesday for some reason. All locations are naming the files accordingly before sending. In case of aberration, proper naming is given at NERLDC on receipt.

3.4 Receipt of SEM Data at RLDC

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Softwares for viewing of meter data and converting Binary files to text (NPC) files are supplied by Meter manufacturers.

For L&T Meter: VINCOM and VINPLUS For Elster Meter: PEARL REPORTING

3.5.1 L&T Meters

Binary files of L&T meters are in ddmmXXX.dat format and are stored in the location D:\ddmmyy. Here, VINCOM is used for conversion to NPC format.

3.5.1.1 VINCOM Software

Step-1: Click on the Vincom icon on the desktop This will open the Login window as shown below.

Step-2: Login using appropriate Name and Password This will open the menu driven Vincom user interface as shown below.

Step-3: Click on Import from Data in main menu to open a small window within

Vincom.

3.5 Softwares for Data Viewing / Conversion to TEXT File

85

Step-4: Use Browse button to select the desired dat file and click on Open button. Unlike

Smartgrid here only one file can be selected at a time.

86

Step-5: Now click on Import button.

Step-6: On successful import a message will appear. Thereupon one can repeat Steps 4 to 5 to import additional dat files. One can also close the import data window by clicking on Close button.

87

Step-7: Click on Conversion To Text option of main menu to convert the imported file to text file. This will open a small window named Convert To Text within the main window.

Step-8: Select the desired file based on the date and time of import of the concerned file which appears in the drop-down list of the Select Date/Time entry field. This is often very tricky as one must keep track of the particular file according to the date and time of import. To work around this issue a file is imported and converted to text file before proceeding with import of next file.

88

Step-9: Then Click on the browse folder button to open the folder/file navigation window. Select the location where the converted text file, i.e., npc file will be saved. The file name usually ddmmXXX.npc has to be keyed in the field provided for file name. Then click on open. By default, the file is saved in Vincom folder. Moreover, the program does not allow over writing a pre-existing npc file. To work around this issue, it is ensured that npc file of same ddmm file does not exist.

Step-10: Now click on the Convert button to start the conversion process.

89

Step-11: On successful conversion acknowledge the message by clicking OK button.

Step-12: Next click on the Close button to exit the Conversion to Text window and go to the main menu.

90

Step-13: To close Vincom click on the close button of the main menu, this will ask for a confirmation to quit the application.

Step-14: Click on Yes to exit.

91

3.5.2.2 VINPLUS Software

Step-1: Click on the Vinplus icon on the desktop. This will open the Login window as shown below.

Step-2: Login using appropriate Name and Password This will open the menu driven Vinplus user interface as shown below. Step-3: Click on “Ascii Convert” from “ASCII” in main menu to open a small window

within Vinplus.

92

Step-4 : Click on “Source Path” to select the source folder where all raw data (*.mdt) files will be available.

Step-5 : Click on “Destination Path” to select the result folder where all text data (*.npc) files will be stored.

It is to be noted that Source file and destination file should not be same folder.

Step-6 : Click on “Convert to Ascii” in that separate window.

93

Step-7 : After Ascii conversion following window will appear and click on “Ok” option which will appear in a small separate window.

Step-8 : Click on “Exit” option.

94

Step-9 : Close the application simply click on “Close” button.

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3.5.2 Elster Meters: 3.5.2.1 PEARL Metering Information Management Software

Step-1: Click on the Pearl NPC Conversion Icon on the desktop . This will open the Login window as shown below.

Step-2: Click on Reports → ABT Export → M+/M++ [Midnight] to open a small window within Pearl.

96

Step-3: Click on Select Directory button and browse the desired .RM3 file and click on

Open button. All the .RM3 files present in the folder will appear on the small window.

Step-4: Tick the check boxes to select each of the files to be converted.

97

Step-5: Click on Generate Report.

Step-6: Click on Save As button and browse the location where the converted file is to be saved. Click on Save button after naming the converted file.

Step-7: Click on Close button to exit the application.

3.5.2.2 PEARL NPC Conversion Software

Step-1: Click on the PEARL NPC Conversion icon on the desktop .

This will open the Login window as shown below.

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Step-2: Click on Reports → NPC (M+/ M++) to open a small window within Pearl.

Step-3: Click on “Select File” to select the source folder where all raw data (*.RM3) files will be available.

99

Step-4: Click on “Select NPC Path” to select the result folder where all text data (*.npc) files will be stored.

Step-5: Click on Generate NPC button. A small pop-up will appear. Click OK button.

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Converted file will be saved automatically under the same name as the source file.

Step-6: click on NPC Data button to view the converted data.

Step-7: Click on Close button to close the Application.

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Now that *.NPC files for both Secure and L&T meters have been prepared, let us discuss the structure and contents of the .NPC file for better understanding of the basics before subsequent data processing. Each .mri/.dat/.mdt file has its corresponding .NPC file. The general structure and organization of a typical .NPC file is reproduced below.

The line WEEK FROM 0000 HRS OF 07-04-08 TO 1238 HRS OF 16-04-08 implies that file contains data from 0000 Hrs of 7th Apr’08 to 1230 Hrs of 16th Apr’08, i.e., the last 15 min block data of 16th Apr’08 at the time of data collection which is 1238 Hrs of 16th Apr’08. The next line NP-0302-A 67124.5 44891.9 97902.9 07-04-08 contains following information – 1. Meter Serial No (NP-0302-A) – wherein NP stands for National Power Transmission Corporation the former name of Powergrid Corporation of India Limited followed by a 4-digit meter serial number and finally an alpha code (A or B) to indicate secondary CT current (A for 1 ampere and B for 5 ampere).

2. MidNight Net Wh (67124.5) - This is a cumulative register reading which indicates the initial Net active energy in Wh at the beginning of the day. This cumulative register records Net active energy in Wh on daily basis.

3. Reactive High Energy (44891.9) 4. Reactive Low Energy (97902.9)

3.6 Structure of NPC File

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There are two cumulative registers which record the reactive energy (VARh) exchange on daily basis under high and low voltage conditions, i.e., when RMS voltage is >=103%Vn and when RMS volage is <97%Vn but >70%Vn

Cumulative net Wh, net VARh for voltage high and voltage low condition at each midnight is recorded in 5 main digits and 1 decimal digit. These figures are always positive and cycles from 0 to 99999.9 in forward or backward direction depending on energy export or import. 5. Date (07-04-08) – This indicates that the 6 Rows X 16 Columns arrangement of data pertains to this date.

Next is the blockwise data arranged as 16 block data in each row and total 6 rows for complete 24 hours (96 time blocks of 15 min each) data with the following format:

StartingHour AvgFreq StatusIndication NetEnergy AvgFreq StatusIndication NetEnergy....

StartingHour indicates the time in hour at the beginning of each of the 6 rows.

AvgFreq (average frequency) is recorded for every 15 min block as a 2-digit code ( 0 to 99) and is computed based on the no. of voltage cycles in one 15 min block divided by (15*60=900). Computation of average frequency is done only for the period during which the VT supply was available in the 15 min block under consideration. The frequency data is available for each successive 15 min block in encoded form as (Average frequency – 49.5)*100 and neglecting decimals. When frequency is <=49.5 it is recorded as 0 and when the frequency is >=50.5 it is recorded as 99. The actual frequency corresponding to two consecutive codes differ by 0.01Hz.

StatusIndication may be either ‘*’ to indicate supply down or supply failure which might be momentary or might have lasted for several blocks Or ‘rr’ to indicate time retardation undergone Or ‘aa’ to indicate time advance undergone. Finally sum of net energies (96 blocks) is given at the end of last row of the day having complete 24 hours data.

Advance/Retard RTC command : Using these commands, 6 consecutive 15 min time blocks are contracted/elongated by 10 seconds each (with the first 15 min block being the closest 15 min block from the time of keying in the RTC command). Moreover once advance/retard RTC command is given, a lock-out of seven days sets in which implies that the next RTC command can be given only after seven days of the earlier RTC command. This implies that only 1 min time correction can be executed over a week. There is ‘aa’ or ‘rr’ indication stamped against the corresponding 15 min time blocks for which advance or retard RTC was executed. A ‘*’ indication implies power failure in the corresponding 15 min block or RMS voltage in any or all phases was <70%Vn for at least 3 secs. NetEnergy (active energy) is recorded by the meters in Wh for every 15 min based on the average active energy exchange for the time block considered. Net Wh data is available for each successive 15 min time block up to second decimal with plus/minus sign corresponding to energy export/import.

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Annexure-1

Write-up on RS-232 and RS-485 Standards

RS-232 STANDARD

• RS-232 - serial binary data communication between a DTE (Data terminal equipment) and a DCE (Data Circuit-terminating Equipment).

• Used extensively in computer serial ports.

• ITU-T standard is V.24.

Voltage levels

• The standard specifies a maximum open-circuit voltage of 25 V, however signal levels of ±5 V,±10 V,±12 V, and ±15 V are all commonly seen.

• Logic one is defined as a negative voltage.

• Logic zero is positive voltage.

Slew Rate

The slew rate, or how fast the signal changes between levels, is a vital specification which tends to limit the communication rate.

104

3-wire and 5-wire RS-232 A minimal 3-wire RS-232 connection consist only of transmit data, receive data and ground when the full facilities of RS-232 are not required. When only flow control is required, the RTS and CTS lines are added in a 5-wire version.

LIMITATION OF RS-232

• Single-ended signaling referred to a common signal ground limits the noise immunity and transmission distance.

• Multi-drop (connection between more than two devices) operation of an RS-232 compatible interface is not defined; while multi-drop "work-arounds" have been devised, they have limitations in speed and compatibility.

RS-485 STANDARD

• The RS-485 standard is a balanced data-transmission scheme. ANSI TIA/EIA-485.

• Communication over long distances and noisy environments.

• OSI model physical layer electrical specification: *2-wire+Ground, *Half-duplex, *Multipoint Serial Connection.

Half-Duplex Full-Duplex

Time

V

O

L

T

A

G

E

105

• The standard specifies a differential form of signaling.

Waveform example RS-485 itself does not specify formatting of bytes, format of RS-232 is normally used.

106

Noise in straight and twisted pair cables

RS-232 RS-485

Differential no yes

Max number of drivers Max number of receivers

1 1

32 32

Modes of operation half or full

duplex half duplex

Network topology point-to-point multipoint

Max distance (acc. standard)

15 m 1200 m

Max speed at 12 m Max speed at 1200 m

20 kbs (1 kbs)

35 Mbs 100 kbs

Max slew rate 30 V/μs n/a

Receiver input resistance 3.7 kΩ ≧ 12 kΩ

Driver load impedance 3.7 kΩ 54 Ω

Receiver input sensitivity ±3 V ±200 mV

Receiver input range ±15 V –7.12 V

Max driver output voltage

±25 V –7.12 V

Min driver output voltage (with load)

±5 V ±1.5 V

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L&T Meter connected in Misa Control Room Panel showing

• Meter Serial Number : NP-5301-A

• phase 4 wire PT connection

• phase CT connection

• RS-485 wiring

Lead wires with Temporary Power supply

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RS-485 TO RS-232 Converter

Screen shot of a Scheduler presently used in Misa S/s

**********

63.5 V supply leads

from temporary Power

supply arrangement

RS-485

TB

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Annexure-2

OPERATING INSTRUCTIONS FOR SEMs AND DCDs

1) SEMs Data Collection: Every Monday morning data is to be collected using a Data Collecting Device (DCD), a small hand-held unit though an Optical Coupler Cable. The same is used to dump the SEM data into a PC using a Serial Port Communication Cable with the help of a manufacturer supplied software. The text form of the data is to be created through this software and is to be checked for proper format and syntactic correctness. Voltage failure flags (*) are to be correlated with PT supply failures due to feeder shutdowns / Blown fuse, Switching operations etc. Time Correction flags (aa/rr) are to be correlated with the Time Advance/Retard commands given through DCD. After all the above checks, the binary coded file (*.MRI in case of SML meters or *.DCD and *.DAT in case of L&T meters as the case may be) is to be transmitted to NERLDC through email. The reasons for Voltage Failure flags shall be intimated to NERLDC for incorporating necessary adjustments for under recording. Time correction flags shall also be intimated so that the same can be analysed further. The data along with above information and site observations shall be e-mailed to [email protected], [email protected], [email protected] 2) Data collection in case of feeder outage In case the feeder is in ‘out of service’ condition the meter will not communicate with DCD as the power supply to the meter will not be available. In such cases for enabling data collection a single phase supply of 63.5V may be extended between any of the phase and neutral points of the voltage terminal of the meter through a means like ‘Variac’ or any such transformer which gives the required output. While doing this, permission may be obtained from local operational staff and due care may be taken to effect necessary isolations like removal of PT fuse or corresponding PT input wiring to the meter etc. In case of L&T meters a battery backup button is provided for data collection during the feeder outage conditions. The same may be kept pressed and data shall be collected. This button is to be sparingly used to conserve the battery back-up and is to be kept pressed while data collection is going on. 3) Periodical Checks: SEMs • Special energy meter may be periodically checked for any low voltage LED indication. If the LED becomes steady, it indicates the average voltage falling below 70%. PT inputs may be checked for any blown fuse etc. • The push button display on the front panel may be made use of, for periodical checking of various parameters measured by the meter • Time Drift checking




110

Since the data recorded by SEM is time stamped (15 min. block data), it is very important to maintain the time of the meter, as it is prone to drift due to inherent variation of parameters like temperature, humidity etc. The time of the meter (Real Time Clock) as shown on the display panel of the SEM may be periodically checked for its correctness with respect to GPS/AIR time. When the time drift is more than 1 minute, necessary correction through the DCD may be carried out. It may be noted that time correction through DCD can be done by only 1 minute in a week and if the drift is more than 2 minutes, correction may be carried out in successive weeks. Due care may be taken regarding the type of correction i.e. ADVANCE or RETARD depending on whether the meter is SLOW or FAST. All the sites have to send weekly reports on the time drift of the SEMs and also the details of Time corrections carried out. DCDs • Manual for DCD shall be thoroughly studied to ensure proper operation of DCD. • DCD may be carefully handled and preserved in a suitable cover, when not in use. • Healthiness of Data Collecting Device (DCD) and associated cables, accessories like charger, battery etc. shall be maintained to avoid last minute emergencies. • It is preferred to use a fully charged battery with the DCD before data collection. • In case of Analogic DCDs, the DCD may be kept in charged condition for at least 24 hours before data collection. 4) Special precautions SEMs i) Never keep the SEM in De-energised condition for long durations, to avoid drain on the internal battery. In case of spare meters, the SEM may be kept in charged condition by extending the supply to the voltage terminals. ii) Never leave the optical window uncovered. Otherwise entry of dust particles on the window glass may result in problems in data collection because of improper communication of DCD with the meter. iii) Never remove the optical cable from the meter while data collection is in progress. Doing so may result in hanging of the internal processor because the same would be in handshaking mode with the DCD till the data collection process is completed. iv) Never subject the meter to extreme climatic conditions. It may be suitably guarded in a safe panel free from dust and water ingression. DCDs i) Never use a non-chargeable/disposable Battery cell in the DCD as it is prone to improper drain characteristics. ii) Never fold the optical cable used for data collection or data dumping cable as this may result in cutting of the internal strands or opening of the soldered joints. iii) Never leave the Analogic DCDs (supplied with L&T and SML new meters) in uncharged condition for a long time as it may result in corruption of the internal software.

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Documents

Final Schedule import - Nerldc.in