[1] TECHNICAL SPECIFICATIONS FOR 0.2S ACCURACY CLASS AC STATIC TRIVECTOR ENERGY METERS, SUITABLE FOR AVAILABILITY BASED TARIFF (ABT)APPLICATION in Bulk, Inter Utility power flows(Wind farm HTServices) .

1.0 SCOPE: 1.1 This specification is of class 0.2S accuracy static HT tri vector

availability based tariff meters along with other associated equipments as per requirement given in this specification. The meters shall be used for commercial/tariff metering for bulk, inter utility power flows (WFHTSC) as well for ABT application.

1.2 The meter shall be installed on various EHV/HT services as a self

contained device for measurement of average frequency and active energy (Mwh) for each successive 15 minute blocks. The meter shall be capable and configurable to other tariff applications like Time of Day (TOD) metering.

1.3 The meter should be 3 phase 4 wire type suitable for connection to 3

phase 4 wire as well as 3 phase 3 wire system. The meter should be capable to record and display Active, Reactive and apparent energy and maximum demand for 3 phase 4 wire as well as 3 phase 3 wire AC balanced/ unbalanced loads without effecting the accuracy for a power factor range of zero (lagging), unity and zero (leading) for export and import as per the requirement given in this specification. The meter shall be capable to measure in all the four quadrants.

1.4 It is not the intent to specify completely herein all the details of the

design and construction of material. The material shall, however, confirm in all respects to high standards of engineering, design and workmanship and shall be capable of performing for continuous commercial operation in a manner acceptable to the purchaser, who shall interpret the meaning of drawings and specification and shall have the power to reject any work or material which in his judgment is not in accordance therewith. The offered materials shall be complete with all accessories, hardware, software and components necessary for their effective and trouble free operation, Such components shall be deemed to be within the scope of bidder’s supply irrespective of whether those are specifically brought out in this specification.

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2.0 STANDARDS APPLICABLE:

All meters covered under this specification shall conform to latest issues / amendments of the standards given below : (1) Indian Standard No. IS 14697 – 1999 AC Static Transformer Operated

Watt-hour and VAR-Hour Meters, class 0.5 S. (2) IEC –60687 – 1992- AC Static Watt-hour Meters for Active Energy, Class -

0.5S. IEC 6 20 52 -1 1 : Electrict y meter ing equipments (AC) - General requirement s & test conditions Part 11

IEC 62053-22 : Electricity metering Equipments(AC)-Static meter-cl-.0.5S (3) CBIP Specification 88, 93&111 (Revised latest). (4) IEC 61000-4-5:2001-04-immunity test (5) IS.12063 – Degree of protection for enclosures. (6) IS.12346 –Testing equipments. (7) IEC 62053-11, 21&61-test, requirement & power consumption. (8) IEC-61000-4, 5 & 6- EMI/EMC Withstand (9) IS 11000- Fire hazard testing (10) IS-9000 – BET procedures. (11) IEC.15707, 2006- Testing & maintenance of AC meters, code of practice. (12) ICS-BIS-ETD 13-6211 (13) Guidelines on “Data Exchange for Electricity Meter Reading, Tariff and Load Control – Companion Specification” (This shall be as per ICS-BIS-ETD 13 -6211 Apr 2010.)

In case of any conflict or discrepancy between the provisions of these standards and the provisions of this specification, the provisions contained in this specification shall prevail.

Meters matching with requirements of other national or international standard which ensure equal or better performance than the standards mentioned above shall also be considered. When the equipment offered by the bidder conforms to standards other than those specified above, salient points of difference between standards adopted and the standards specified in this specification shall be clearly brought out in the relevant schedule and copy of such standards along with their English translation shall invariably be furnished along with the offer. Further, CMRI (Common Meter Reading Instrument) shall confirm to CBIP Technical report no.88 & 111 with latest amendments.

[3] 3.0 CLIMATIC CONDITIONS

The meters to be supplied against this specification shall be suitable for satisfactory continuous operation under the following tropical conditions: a) Maximum ambient air temperature in shade : 50 deg.C. b) Minimum temperature of air in shade : (-) 5 deg.C c) Maximum relative humidity : 95% d) Minimum relative humidity : 10% e) Height above mean sea level : Up to 1000 meters f) Dust storms likely to occur : March to July g) Average No. of thunderstorm days p.a. : 40 h) Average No. of tropical monsoon : 4 months (conditions) per annum. i) Average rain fall : 10 cms to 100 cms The temperature range and relative humidity for performance of meters shall be as per the relevant standards.

4.0 TECHNICAL PARAMETERS 4.1 The energy meter shall be indoor type connected with the secondary side of outdoor current and voltage transformers.

Supply system: Rated Voltage : 3x110/3 V Phase to Neutral (3P4W) Rated current : 1 Amps or 5 Amps as per requirement

System frequency : 50 Hz +/- 5% Earthing system : Solidly grounded Accuracy : Class 0.2S or better accuracy. Multiplying factor to arrive at actual primary values wherever applicable shall be calculated from the CT and PT ratio of the installed CTs and PTs.

[4] 4.2 POWER SUPPLY VARIATION: The extreme power supply variation, which an operating meter should withstand without damage and without degradation of its meteorological characteristics when it is subsequently operated under its operating conditions, as per IS and CBIP Standards. VOLTAGE Vref +20% to -40% POWERFACTOR RANGE

Zero lag – Unity – Zero lead

FREQUENCY 50 Hz + or – 5% The limits of error for +20 to -40% V ref variations shall be as per standards.

5.0 GENERAL TECHNICAL REQUIREMENTS : 5.1) Meter Case The meter Case shall be made up of unbreakable high grade flame retardant poly carbonate with minimum thickness of 2 mm and of good di-electric & mechanical strength. Meter case and external terminal cover should be injection moulded in UV stabilized poly carbonate. Wherever poly carbonate is specified it shall confirm to IS:11731(FH1-Category)

The moulded meter case should not change in colour, shape, size, dimension when subjected to 200HRS on UV Test as per ASTMD 53. It should with stand 650Deg C glow wire test and heat deflection test as per ISO 75. Bal presure test as per IEC-60695-10-2 and Flammability Test As per UL 94 or As per IS: 11731 (Part-2) 1986. The External Terminal Block Cover shall be kept fully transparent. The window portion should be fully transparent, unbreakable UV stabilized poly carbonate for easy reading of all the display values/ parameters and should not fade in course of time and become opaque causing inconvenient in course of time. It should be compact and of reliable design to make it immune to vibrations and shocks in normal transportation and should be capable of withstanding several stresses likely to occur in actual service. The latest state of art technology of surface mounting of components etc. may be used for the purpose. The soldering if any used shall be protected against dry solders. The construction of the meter shall be such as to permit sealing of the meter cover, the terminal cover etc. independently. It should be ensured that the internal parts are not accessible for tampering etc., without breaking the meter cover and meter seals. The meter cover should be ultrasonic welded/glued with the meter base and there shall not be any

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fastening arrangements for the same. The ultrasonic welding/gluing should be continuous in nature such that no part of the periphery shall be left without bonding. This is to ensure that in case of any attempt to open the cover from the base, there should be visible evidence of opening/tampering.

The material of the meter case shall have the following properties:-

1. Physical water absorption (%) - max-0.35 2. Electrical dielectric strength at 90 ˚C in oil(KV/mm)-min-16 3. Thermal HDT(˚C)-min-125 4. Flammability a. Rating-FV2 b. Glow wire test 650-passes IEC-60695-2-1-12&IS:11000-2-1 5. Mechanical a. Tensile strength(Mpa)-min-50 b. Flexural strength(Mpa)-min-90 c. Izod impact strength notched 23˚C(KJ/sq.m)-min-8 b) TERMINAL ARRANGEMENTS: The general and construction requirements of the terminals, terminal blocks and terminal covers should be as per clause 4.2.2.3 to 4.2.2.4.2 of CBIP Report 88.

The connection diagram of the meter shall be clearly shown for 3 phase 4 wire system as well as 3 phase 3 wire system, on inside portion of the terminal cover and shall be of permanent nature. The meter terminals shall also be marked and this marking should appear in the above diagram. In case of any special precautions need to be taken at the time of testing the meter, the same may be indicated along with the circuit diagram.

TERMINAL BLOCK: The terminal block shall be molded type made of non-hygroscopic, flame-retardant material having good dielectric & mechanical strength. The meter terminal block shall have Nickel/tin-plated brass terminal inserts. The terminal screws shall have flat bottom so as not to pierce the external conductor. The terminals and the screws shall be suitable to carry up to 150% of Imax safely. Two screws shall be provided in each incoming and outgoing terminal for effectively clamping the external leads. Each screw shall engage at least 3 threads in the terminal.

[6] The internal diameters of the terminal holes shall accommodate a conductor having a cross section at least equivalent to the main current conductors and should not be less than 5 mm and shall be capable of carrying continuous current up to 150% of Imax. The manner of fixing of incoming and outgoing leads into the terminals shall be through thimbles/lugs/reducer type terminals and the supplier shall supply the same along with each meter without any extra cost. All terminals for CT and VT connections shall be arranged at the lower

side of the meters. Terminal shall have a suitable construction with barriers and cover to provide a safe and secure connection of CT & VT wires.

The terminal block should satisfy all the conditions specified in IS and IEC .The material of the terminal block should fulfill the requirement of following tests: a. The flame retardant rating of VO as per UL 94 rating. b. The glow wire test for temperature of 960 ˚C as per IS:11000(part-

2/sec.1) or IEC 60695-2-1 c. Heat deflection temperature(HDT) test of 135 deg. C as per ISO 75

or ASTM D-648. d. Ball pressure test at 125˚C as per IEC-60335-1 The terminal cover shall be extended and transparent such that when it is placed in position it is not possible to approach the connections or connecting wires. The extended terminal cover shall be of transparent one and should have a minimum length of 50 mm from terminal base end. The terminal shall have a suitable construction with barriers and covers to provide secure and safe connections. The terminal cover should have two nos. security sealing provisions. The seal wire hole should be suitable for wire size of 18SWG.Provision for seal should be made in front side of the meter terminal cover. The terminal cover shall be engraved/embossed with the logo of Vendor.(Stickers will not be accepted) C) FIXING ARRANGEMENT OF METER The meter shall have minimum three fixing holes, one at the top for mounting and two at the bottom, inside the terminal cover. The top hole shall be key-hole type on the back of the meter base so that hanging screw is not accessible after fixing meter and it shall be not possible to remove the meter from the hanging screw without removing the terminal cover and screws behind the

[7] terminal block cover. The lower fixing holes shall be provided under ETBC.All the fixing holes shall be such designed that once meter is mounted; the screw heads shall not be accessible. The vendor shall provide the appropriate fixing screws along with the meters.

5.2 CT ARRANGEMENT The meter shall operate on CT. The current circuit shall be appropriately insulated and designed to withstand the temperature rise of 50˚C over the ambient at maximum current. Specific confirmation to be submitted by the vendor that the accuracy of measurement will not suffer due to utilization of shunt on account of thermal variation and temperature coefficient up to an operational temperature of 80˚C.The CTs shall have proper magnetic shield and shall be mounted firmly without any movement. 5.3 The micro processor based 3 phase 4 wire/metering system shall conform to class 0.2s as per IEC 62053-22:2003. The meter shall compute the active energy and load import; active energy and load export from the substation bus bars during each successive 15 minute integration period block and store it in its non volatile memory. 5.4 The active energy measurement (Wh) shall be carried out on 3 phase 4 wire principle with accuracy as per class 0.2S of IEC 62053-22:2003. The meter shall compute the active energy import and export and average frequency during each successive 15 minute block and store in its memory along with its sign. It shall also display on demand the active import and active export during the previous 15 minutes block. The values may be displayed directly in secondary quantities. 5.5. Further the meter shall continuously integrate and display on demand the cumulative active energy import and export from the substation up to date and time of meter reading. The cumulative active energy import and export & cumulative reactive energy import and export reading at each midnight shall be stored in the meter memory for last forty five (45)days and shall be reported at Base Computer Software (BCS) end. Separate registers shall be maintained for active energy import and export. 5.6. The meter shall count the number of cycles in VT output during each successive 15-minutes block, and divide the same by 900 to arrive at the average frequency. This shall be stored in the meter’s memory as a 2-digit code that shall be arrived at by subtracting 49 from the average frequency, multiplying by 50 and neglecting all decimals. For example, 49.89 Hz shall be recorded as 44. In case the average frequency is less than 49.0 Hz, it shall be recorded as 00. In case it is 51.0 Hz or higher, it shall be recorded as 99.

[8] 5.7. The average frequency (Hz) of previous 15 minute block shall be displayed on demand in the metering system. 5.8. The meter shall continuously compute the average of the RMS values (fundamental only) of the 3 lines to neutral PT secondary voltage as the percentage of 63.51 V and then display the same on demand. 5.9. The meter shall compute the reactive power (VAR) on 3 phase 4 wire principle with accuracy as per IEC 60253-23:2003 and integrate the reactive energy algebraically in two separate registers, one for the period for which RMS voltage is higher than 103%(Reactive High), and the other for the period for which the RMS voltage is below 97%.(Reactive Low). When lagging reactive power is being sent out from the substation bus bars, reactive registers shall move forward. When reactive power flow is in the reverse direction, reactive registers shall move backwards. The Nett KVARH for voltage high (103%) & Nett KVARH for low voltage (97%) both shall be displayed. 5.10. Provision for measuring the THD in % & available in the display and for

the system for current harmonics only ( Minimum up to 21st order) shall be made available in the memory and shall viewed through BCS software.

5.11 POWER CONSUMPTION: VOLTAGE CIRCUIT: The active and apparent power consumption in each voltage circuit including the supply of meter at reference voltage, reference temperature and reference frequency shall not increase 1.0 watt per phase and 4 VA per phase. The voltage circuit shall be appropriately encapsulated.

CURRENT CIRCUIT:

The apparent power taken by each current circuit at basic current, reference frequency and reference temperature shall not exceed 1 VA 5.12 Starting Current:

The meter should start registering the energy at 0.1% lb at unity power factor.

Maximum Current: The rated maximum current of meter shall be 120% of basic current

(Ib).

[9] 6.0 BATTERY The meter shall have a primary internal battery or a super capacitor with sufficient capacity to enable the meter reader to take reading under power off condition with following provisions: a. Suitable rechargeable super capacitor back up for continuous display for 48 hours from instant of power failure. The display should be powered up through push button only when power failure occurs. This arrangement shall be robust such that down loading of meter data during power off condition is not affected and minimum three down loads are guaranteed for a outage. There shall be a suitable backup provision for display in case of super capacitor failure. The performance of the super capacitor shall be verified by removing all the batteries from the circuit in any meter during sample testing or inspection. The charging time of super capacitor shall not be more than 6 hours OR b. Primary battery activated through push button during power failure with guaranteed life period of 10 years. No power shall be consumed from this circuit when mains are available and also when push button is not activated. If the battery fails within meter warranty period the meter will be replaced . The life period of primary battery provided should be at least minimum 10 years and the guarantee card of the battery . Alternatively the vendors can produce certificate from the primary battery manufacturer to the effect that it can guarantee 50,000 display operations for two minutes display duration. The primary battery shall be of only industrial type, commercial type will not be accepted, if any supplier found using commercial type battery their offer will be summarily rejected also if found later during effecting supplies the vendor will be black listed. In any case, RTC battery power shall not be used for display under power off condition. Battery used for the meter display during power off condition shall be separate from the battery used for the real time clock. 6.1 REAL TIME CLOCK AND BATTERY: The MD integration cycle shall be on the function of RTC of the meter. The maximum drift in real time clock of the meter shall not exceed plus or minus 3 minutes per year and crystal should be temperature compensated for temperature range of 0 to 50˚C when powered by internal battery or supply. This shall be verified during sample testing and inspection. A non-chargeable lithium

[10] battery of adequate storage energy with 10 year guarantee period only should be provided. Necessary document to this effect has to be submitted. If the battery fails within meter warranty period the meter should be replaced by the supplier. The Synchronization of Meter RTC Time/day shall be possible through password / key code enabled command from the Remote Server. In case of meter connected to AMR system through GSM/GPRS/PLCC modem, the meter should be able to synchronize its clock with the system time. Battery used for the meter display during power off condition shall be separate from the battery used for the real time clock. Facility for correcting the drift in Real Time clock through CMRI has to be provided with proper security. Whenever RTC is corrected, all the registers and other parameters shall be updated. The date and time should be user programmable. The meter should be capable of storing in the memory the readings of a specified date and time in a month / two months for the purpose of retrieving the same at a later date without change in the specified timing while correcting the drift. The RTC shall be preprogrammed to for forthcoming 30 Years for Day / date without any necessity for correction.

The data stored in the memory shall not be lost or updated when the meter is in power off condition, so that same are retrievable even after lapse of several months. (This is to enable utility to defend their cases legally in case of disputed meters/billing revision.)

7. NON VOLATILE MEMORY: The meter should have non volatile memory, so that the registered parameters will not be affected by loss of power. The non volatile memory should have a minimum retention time of 12 years. It is the responsibility of the meter manufacturer to retrieve the data from this memory, in the event of display failure and other defects except for completely burnt meter as and when requested by the purchaser with in a period of 30 days from the date of intimation. The transportation cost for the same should be borne by the supplier. If the data could not be retrieved for any reasons the same shall be communicated to the respective circle MRT with the reason for non retrieval.

8 DISPLAY: The meter shall have a minimum, 7 digit bright liquid crystal display (LCD) which shall be of STN(super twisted pneumatic)/FSTN type, construction suitable for temperature withstand of 80 degree centigrade(storage) and 65 degree for operation, with high contrast . The minimum character shall be 10 mm height and 5mm width (for alphabets it shall be 5 x 3 mm). The LCD display should have wide viewing angle of 45 degree to 60 degree cone up to 1m distance. The display size shall be to accommodate 5+2 digit of specified size with

[11] inter digit gap of 1mm and side gap of 2mm on all four sides Provision shall be made to read consumption in whole units with two decimal digit to read up to one hundredth of KWHr .The decimal digit shall be clearly distinguished from integral. The accuracy of display parameters on LCD display for all parameters shall be matching with the accuracy class of meters as per IS. For a clear visibility of the display of the meter reading at a distance large viewing area with large display icons is preferred. The display should not be affected by electrical & mechanical disturbances.

When the meter is placed in a enclosure at a constant temperature of 65 degree ‘C’ for a period of 30 minutes the character of LCD should not deform and also when kept at a constant temp of 80 degree for a period of 30 minutes, the LCD should work satisfactorily when restored at normal temperature. The LCD shall have a minimum life period of 100K hours with operating temperature range of 30-80˚C.

The register shall be able to record and display starting from zero, for a minimum of 1500 hours, the energy corresponding to rated maximum current at reference voltage and unity power factor. The register should not roll over in between this duration.

The LCD display of the meter should be backlit. The backlit should not glow during power off condition and should glow even with one phase supply.

Dot-Matrix type LCD display is not acceptable.

DISPLAY RESOLUTION:

1. Voltage = 0.01V

2. Current = 0.01A

3. P.F. = 0.01

4. Active Energy = 0.01 Kwh

5. Apparent Energy = 0.01 Kvah

6. Reactive Energy = 0.01 Kvarh

7. Demand = 0.001 KVA / KW

The display for Kwh, Kvah and Kvarh should have facility for high resolution display with minimum 6 decimal digits to facilitate testing with desired accuracy with 30/15 minutes integration period.

[12] 9 LED Indications LEDs shall be provided for following indications a) LED for Test output pulse (Separate for Kwh & Kvarh) – Red b) LED for current reversal – Yellow (respective phase shall start

blinking) However, except for the test output pulse LED, the other indication can be alternatively provided as Icon on backlit LCD display. LED shall be low power consumption and distinctly visible from distance. Location of calibration of LED (Preferably at the centre should be such that) the calibration pulses can be sensed easily through the sensor. The above LED shall have minimum intensity of 10 milli-candelas, accessible from the front. The clearance of calibration LED from any of the sides of window portion shall be approximately 20 mm. The relation between test output and the indication on display shall comply with the marking on the name plate(impulse /Kwhr & Kvarhr). The bidder shall state the necessary number of pulse counts to ensure measurement accuracy of at least 1/10th of class of the meter at different test points. 10. CONNECTION DIAGRAM: Every meter shall be indelibly marked with connection diagram showing the phase sequence for which it is intended and shall be attached to the inner side of the extended terminal block cover. In case of any special precautions need to be taken at the time of testing the meter, the same may be indicated, along with the circuit diagram. 10.1 MARKING OF METERS: Every meter shall have name plate beneath the meter cover window portion such that name plate cannot be accessed without opening the cover.

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In addition to the details furnished in clause 4.2.2.12.1 of CBIP Report the following details should be incorporated in the meter. a. Year of manufacture with month: b. Guarantee period : c. Ultrasonic welded or Glued: d. Firmware version of meter e. Meter Type f. Internal CT&PT ratio g. Manufacturer name h. Meter serial number. The name plate should not get damaged due to atmospheric conditions and the marking shall be indelible, distinct and readable from outside the meter. The nameplate marking should not fade or otherwise be adversely affected by UV exposure with lapse of time. Also the connection diagram of the meter as per clause 4.2.2.12.2 of CBIP shall be furnished. The pulse rate of kwh and Kvarh ( meter constant ) should be indelibly provided on the name plate. 10.2 All the material and electronic power components used in the manufacture of the meter shall be of highest quality and reputed make to ensure higher reliability, longer life and sustained accuracy. The meters shall be designed with application specific integrated circuit and shall be manufactured using SMT (Surface Mount Technology) components. Power supply and voltage divider circuits may be of PTH technology. All insulating material used in the construction of meters shall be non-hygroscopic, non-ageing and of tested quality. All parts that are likely to develop corrosion shall be effectively protected against corrosion by providing suitable protective coating. The meter shall conform to the degree of protection IP 51 of IS:12063/IEC:529 for protection against ingress of dust, moisture and vermin. 11. TOD TIMINGS The meter offered shall contain provisions for multiple tariff metering (time of day metering / demand) and details of the same may be indicated in the tender separately. The meter offered should have a real time clock based on a quartz crystal with a battery totally independent of power supply.

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The meter shall be capable of being set in to minimum of 8 time zones (optionally more time zones can be offered) in 24 hours cycle to cover morning and evening on and off peak periods separately TOD register shall be provided for active energy, reactive energy- lag & lead and demand data.

The number and timings of these TOD time Zones shall be programmed as follows:

TOD TIME SLOTS (8)

DURATION (Hrs.) Total Hrs. DISPLAY PARAMETERS

1 06.00 - 09.00 3 Hrs. KWh, MD (KW) 2 18.00 - 21.00 3 Hrs. KWh, MD (KW) 3 21.00 - 22.00 1 Hr. KWh, MD (KW) 4 05.00 - 06.00

09.00 - 18.00 ( Summed )

10 Hrs. KWh, MD (KW)

5 22.00 - 05.00 7 Hrs. KWh, MD (KW) 6 00.00 - 24.00 24 Hrs. KWh, KVARh, KVAh, MD

(KW) It should be possible to change the time period for the TOD recording through the portable device or a programmable block installed in the meter itself or manually with proper security. Facility to change the MD from KW to KVA whenever required shall be made available. Necessary software for the same shall be supplied. 12. MAXIMUM DEMAND INTEGRATION PERIOD (DIP): DIP shall be set at 15 minutes duration. DIP shall commence at the fixed time intervals of real time. MD recording shall be based on sliding window method with five minutes slab for each window, lesser period shall be preferred. Sliding window integrating demand shall follow the same measurement principle as block interval however the intervals are not independent of each other, but are established through a series of sub-intervals. Demand is to be calculated by averaging the load recorded over continuous sub-intervals which combine in time to equal the demand interval. Successive intervals are shifted in time by the length of the sub-intervals. Necessary software is to be provided for changing DIP to 30 minutes. The rising value of current demand with rising time should be held in the memory in the event of interruption (or) switching off power supply and it should not fall to zero on such instances.

[15] 13. MD. AND POWER FACTOR RESET : Meter shall continuously monitor and calculate the average maximum demand for each demand integration period of 15 minutes and the maximum of these shall be stored along with date and time, when it occurred. The meter should have reprogrammable automatic/ manual resetting facilities of M.D. and A.P.F. If it is automatic reset, MD and Reset should reset on every 16that 00.00 hrs of every calendar month and the reset date can be reprogrammable by TANTRANSCO. Necessary CMRI software is to be supplied by the meter manufacturers. There should be feasibility to reset the meter only through CMRI by authorized person and thro RS 232 port using laptop at site and remotely from central server with meter configuration software. During reset main energy registers should not get affected, the billing parameter should be stored in the memory. INSTANTANEOUS PARAMETER & DISPLAY PARAMETERS This shall be as per ICS-BIS-ETD 13 -6211 Apr 2010. It is essential to provide the push button display mode with up and down scroll. The display time of each parameter in auto should be 10 seconds. On push button mode if no operation is made for more than 5 Mins, the meter display should switch to auto scroll mode. There shall be no blank display at any time of power availability. In push button mode also auto scroll parameters should be made available. Required display list is enclosed in the Annexture. However it will be in line with companion standard Table ref for display of parameters and the assigned OBIS code of the electrical and non- electrical parameters as applicable Parameter value with relevant OBIS code should be made available on display and logged in memory. HIGH RESOLUTION MODE : 1) All import energies in high precision display. 2) All export energies in high precision display.

a. Further, the reactive energy shall also be available as four different energy registers for viewing at BCS and on meter display:

a) Reactive energy lag while active energy import (Q1) b) Reactive energy lead while active energy import (Q2) c) Reactive energy lag while active energy export (Q3) d) Reactive energy lead while active energy export (Q4)

[16] 13.1 Each metering module shall have a built in calendar and clock, having

an accuracy of 3 minutes per year or better. The calendar and clock shall be correctly set at the manufacturer’s works. Current date (day-month-year) and time (hour-minute-seconds) shall be displayed on the front display section on demand. Clock adjustment shall be possible at site using the common meter reading instrument (CMRI) with proper security it shall be possible to synchronize the clock with BCS clock/GPS Clock.

13.2 The meters shall safely withstand the usual fluctuation arising during

faults in particular, VT secondary voltage 115% of rated applied continuously and 190% of rated for 3 seconds and CT secondary current 120% of rated applied continuously and 20 times of maximum current applied for 0.5 seconds, shall not cause any damage to or the mal-operation of the meters.

14.0 GENERAL AND CONSTRUCTIONAL REQUIREMENTS Meters shall be designed and constructed in such a way so as to avoid

causing any danger during use and under normal conditions. However, the following shall be ensured:

a) Personnel safety against electric shock b) Personnel safety against effects of excessive temperature c) Protection against heat & spread of fire d) Protection against penetration of solid objects, dust and water

14.1 The metering system shall conform to the degree of protection IP 51 in

the normal working condition of IS12063/1EC529 for protection against ingress of dust, moisture and vermin.

15.0 COMMUNICATION CAPABILITY : 15.1 The meter shall be provided with a galvanically isolated optical communication port. (Such as IEC, PACT, ANSI etc) with removable cover and with locking arrangement so that it can be easily connected to a MRI / laptop for data transfer.

The communication port shall have proper sealing arrangements. The

meter reading software should be capable of data transferring in respect of all the stored data.

15.2 Any future upgrades (license copy) of software/protocol be furnished to the purchaser at free of cost without any linkage to the guarantee period of the meters. All the parameters available in the registers of the meter shall be user selectable through CMRI.

[17] 15.3. The meter shall also be provided with a galvanic ally isolated RS-232 communication port for data transfer or subsequently hooked to remote metering device i.e. to enable for future adoption to any mode of technology for Remote Meter Reading through various communication means like PSTN/ OPTICAL FIBRE/ GSM/ GPRS/ CDMA/ PLCC/RF coupled with appropriate modem based on communication backbone chosen. It has to be designed as read and write, and locking should be provided for writing mode. 15.4.. The RS-232 port provided in the Meter shall be accessible using a USB to Serial converter in case if PC/Laptop communicating to Meter is having only USB Ports instead of RS-232 Ports. The RS-232 port should be provided under the terminal cover so that it cannot be accessed without opening the terminal cover. RS232 should be in form of RJ-11/D/hard wire connector. 15.5. It shall be responsibility of the meter manufacturer to provide required software and all the facilities free of cost to enable the use of optical as well as RS232 port for reading and retrieving the data from the meter through CMRI and AMR and to download the data to PC Necessary upgrades of software shall be supplied free of cost for downloading simultaneously the existing parameters and any parameters added in future specifications of meters.

The meter shall comply as per the Indian standard - Data Exchange for Electricity Meter Reading, Tariff and Load Control – Companion Specification” The meter supplier shall provide meter reading protocol of open category ie, DLMS(Device Language Message Specification) / COSEM(IEC62056)

The supplier should provide meter reading protocols at free of cost, the I/O mapping or suitable software with documentation at free of cost, which will help a third party agency / service provider to read any make of meter remotely.

15.6. All important data such as measured energies, tamper and load survey should be stored in NVM and same should not be possible to change/tamper these data through any standard serial communication. This will be verified by removing the NVM of the meter and check the working of the meter during testing. 15.7. Data Security: The meter manufacturers are responsible for ensuring that the data extracted from the meters using manufacturer specific algorithms in the software up to down loading to the base computer station remains secure during the process. 16.0 SOFTWARE:

Meter manufacturers shall provide the BCS software which should be compatible with Windows / LINUX platform and suitable software compatible to CMRI for reading the data from the meters.

[18] The computer software shall be user friendly. The data transfer shall be highly reliable and fraud proof (No editing shall be possible on base computer by any means).The software shall have capability to convert all the data into ASCII format All the options available in BCS are to be displayed in the window screen.

The software to be installed in the CMRI/PC for the purpose of reading

and programming the specific make(s) of static meters shall be made available by each meter manufacturer whose meters are to interface with CMRI/PC.

The Software should have polling feature with optional selection of

parameters to be downloaded for AMR applications. The Software should have programmable facility to restrict the access to the information recorded at different security levels.

If the software supplied is of latest version than the earlier one supplied,

then the same shall be such that it is compatible for the meters already supplied and also the meter data already read and available at BCS to the extent possible. Confirmation to this effect shall be furnished along with the offer. The meter manufacturer should provide software for CMRI, BCS as detailed

below:

16.1 The CMRI software should have the following provisions

a. Collection of data (All Data including dumped) b. Download to BCS. c. Billing d. Load Survey e. Tamper f. Setting g. Name plate (Meter Sr.No, Meter type, Rating, Meter constant and

Manufacturing date.) h. Upload from BCS i. Clear CMRI (through CMRI&BCS) j. Instant parameters k. Accuracy Test l. Memory Check (to view available data capacity in terms of No. of

meters & balance space)

[19] 16.1.1 Programming parameters (through CMRI)

a. Demand Integration period(15/30miutes) b. MD type (KW/KVA) c. MD Reset e. Display Parameter Re Organisation f. TOD PROGRAMMING g. Real Time Clock, Date & Time h. Profile Capture period (24hrs-minimum, 90days-maximum) i. Reset date and time Items a,d,f,g,& h shall be programmable from the host (AMR).

The meter reading software should be capable of transferring data including load survey & the entire meter data from meter to CMRI within (10Mins) shortest time. The time taken to complete the process of data collection from the meter thro CMRI and upload to BCS should be within 20 Mins. The data transfer (from meter to CMRI /AMR equipment) rate should be minimum 9600/1200 bps. 16.1.2 The software shall have provision to indicate no. of Meters data available

in CMRI. Provisions must be there to limit the load survey data in terms of days when data is being collected by CMRI from the meter ie.,it shall not be a dumped data for 90 days. The Software shall have time stamp provision whenever downloading of data from Meter. The Name Plate details shall be made available whenever downloading is made from the meter i.e., Meter Sr.No, Meter type, Rating, Meter constant and Manufacturing date. At any instant of time during communication with CMRI the display should not get disturbed and a suitable indication shall be made available in the Meter display/CMRI that communication has been established with CMRI. 16.1.3. The calibration software (CMRI) should have minimum testing time of 15

minutes and the parameters Kwhr, &Kvahr calibrated simultaneously. The start and stop command for calibration shall be instantaneous without any time delay.

The consumption energy between start and stop should be displayed in Common Meter Reading Instruments along with duration of calibration period.

[20]

The CMRI software should be compatible to display the instant parameters phase wise voltage, current (With icon for Direction), signed KW & signed PF & signed KVAr to conduct power check. During the calibration period it should not be possible for the CMRI to go to power saver/ switch off mode. Facility for converting the data in the CMRI to ASCII format or any other format specified by the purchaser is to be provided by the manufacturer within 30 days from the date of intimation. 16.2 The BCS software should have the following provisions 16.2.1 Collection of data from CMRI and Meter a. Dump Data (All Data) b. Billing data c. Load Survey d. Tamper e. Setting f. Name plate (Meter Sr.No, Meter type, Rating, Meter constant and

Manufacturing date.) g. Clear CMRI h. Instant parameters i. Accuracy Test (on BCS/Laptop) j. Uploaded File size display (bytes capacity). 16.2.2 Programming parameters 1. Demand Integration period(15/30minutes) 2. MD type (KW/KVA) 3. Lead Kvahr (lock and unlock) 4. MD Reset 5. Display parameter-reorganisation. 6. TOD Programming 7. Real Time Clock, Date & Time 8. Profile Capture period (24hrs-minimum, 90days-maximum) 10. Reset date and time. 11. MD reset type Auto/Manual 12. MD type (Block method / Sliding window method)

[21] 16.2.3 The BCS software should be capable of transferring data including load

survey & the entire meter data from meter/CMRI within 10Mins for optical port.

16.2.4 The BCS software shall have GUI(Graphical User Interface) facility and

shall be compatible with Windows / LINUX Operating Systems. 16.2.5 The BCS software shall have search facility to access / view Data as per CMRI Id (alpha numeric), Meter Serial no. Uploaded data based on weekly and monthly collection Section wise meters (with assigned code) Data of a specific meter related to a specific period by entering from and to dates. It should be possible to upload the MRI data to any PC having MRI software. A consumer based data uploading facility is required so that MRI will upload data only in that PC which has the concerned consumers` data. The consumer code + meter No. Should be the key for creating consumers` files or overwriting consumers` files in PC. The software system files and data files should be stored in different directories. The “record number field should be 10 digits Alphanumeric.(3digit for circle,3 for Area & 4 for consumer No.) Before accepting the data for “Record Number” the system should wait for pressing of “Enter” key. Two separate fields should be provided for consumer name and address – one name field of one line , and other Address field for two lines. In the collected data, one of the meter data is to be transferred to some other file if necessary such provision shall be made available. In the downloaded data, distribution transformer details are to be provided as optional. 16.2.6 The BCS software shall have the facility to display multiple graphs for

meter reading uploaded for different period for comparison/ analysis while displaying the load survey graph, the exact value for the particular period shall be displayed with respect to the co-ordinates selected. X & Y axis is to be clearly defined and scaled for easy viewing.

16.2.7 The facility to have Backup data for future reference in a separate storing device, the data in BCS shall be compressed in suitable form for transfer and shall be extracted to view/use the same in future as and when required. This provision shall be made available in the software and demonstrated during inspection/installation. (Similar to zip file format)

16..2.9 The software shall have data export facility to spread sheet format like

MS-Excel /Open office without distortion stored of data.

[22] 16.2.10 The software shall have facility to analyze data acquired from at

least two meters database simultaneously. The software shall be capable of opening at least two sessions

simultaneously so that one session shall access one meter / CMRI and another session shall analyze data uploaded from another meter.

The data already available in the BCS should not be overwritten by new data whenever the same is uploaded. 16.2.10 As and when the vendor releases new or latest or advanced versions of Meter Hardware/Firmware / Software, the same should be made available to TANTRANSCO immediately by default on the release date free of cost. The latest versions should support all existing hardware/meters in the field supplied in this tender and earlier supplies if feasible. The above software shall be given with security arrangements and compatible for CMRI, BCS. The successful tenderer should supply necessary software suitable to Common Meter Reading Instrument and BCS for testing along with samples. All the data including load survey to be provided with print along with selection option and print setting option The date and time in BCS is in the form of DD/MM/YY & Time: HH/MM. 16.3 Data Security : The meter manufacturer are responsible for ensuring that the data extracted from the meters using algorithms in the software/firmware of the meters up to down loading to the BCS/AMR Software remains secure during the process. Any repairs and recalibration to the meters should be done only at the factory of the meter manufacturers.

17.0. TAMPER AND FRAUD PROTECTION/MONITORING: 17.1. The meter should have tamper and fraud protection features so as to continue to register active and apparent energy accurately under the following conditions:- a) Phase sequence Reversal: The meter should record actual consumption correctly irrespective of the phase sequence and phase reversal.

b) Missing potential: Correct energy registration even on non

availability of single or two phases. Meter should remain functional even when

[23] either of any phases or any one phase along with neutral is available to the meter and record correct energy.

c) The meter shall continue to record energy as per prevailing condition even if the neutral is accidentally or incidentally disconnected.(For 3Phase 4 Wire meter)

d) The Meter recording should be insensitive to passage of DC voltage or should log as an event in the memory as neutral disturbance. The meter should record energy as per voltage measured between incoming phase and neutral when DC signal/voltage is injected on the neutral through a diode/device. A conformity test on this condition will be carried out at Vref applied between incoming phase and diode terminal.

e) Indication to show whether meter records consumption in all the

three phases should be available in the display. Non recording consumption in any one of the phase should be indicated.

A B C

The above display shall appear even for 50% of rated voltage

availability and blinking for the presence of Load current in concern phase.

h) The meter shall be immune of any abnormal frequency signal or

meter shall log and display as tamper in the event abnormal frequency signal i.e., less than 47.5 Hz or more than 52.5 Hz is supplied to the meter.

i) Meter shall record energy accurately under the effect of signals

emitted by mobile phone or any other such devices. In conformity of this, the meter shall be checked under such influence (10 minutes) as per standards.

j) The meters shall be immune to tampering through application of

external magnetic fields at least up to 0.5 Tesla (DC) and 0.27(AC) as per error limit of CBIP-88 with latest amendment. The magnetic test should be conducted on all three phases.

The meter is expected to be immune to such interference and this

clause is applicable when interference level is beyond immunity

[24]

offered by the meter. The vendor has to state the level under which meter records energy as stated above.

k) The accuracy of the meter should not be affected with the

application of abnormal voltage/frequency generating device such as spark discharge of approximately of 35KV.The meter shall be tested by feeding the output after exposing it to the following conditions for 10 minutes:

- On any one of the phase or neutral terminals - On any connecting wires of the meter - Voltage discharge with 0-10mm spark gap - at any place in load circuit - at proximity of the meter(within 5 cm )

Note 1 : The disturbances to be considered are

(1) Harmonics. (2) Voltage dips and short interruptions. (3) Conducted transients. (4) D.C. and A.C. magnetic fields. (5) Electro Magnetic fields. (6) Electro static discharge. (7) Radio frequency interference suppression.

Note 2 : Especially , special care should have been taken such that DC &

AC magnetic field in proximity of the meter do not damage or influence the meter performance. Besides, an internal magnetic shield has to be provided in the meters in this regard.

17.2. TAMPER. Tamper and fraud monitoring should be generally as per CBIP Specification 88 July 1996 & its latest amendments and also in line with ICS-BIS-ETD 13 -6211 Apr 2010. The tamper indications should be selected and stored in the order of occurrence in three blocks. In the first block, the voltage missing, voltage unbalance and its date of occurrence and restorations, with date and time should be recorded and stored in respective compartments.

In the second block the tamper indications for other features like current circuit short etc., should be recorded.

In the third block other tampers are to be stored.

[25] 17.2.1. Generally the meter shall have the following special features to monitor/

detect tamper and fraud against meter: a. Meter Cover: In the event the meter is forcibly opened, even by 2 to

4 mm variation of the meter cover, same should be recorded as tamper event with date & time stamping and the meter should continuously display that the cover has been tampered and continue to update the parameters internally. It is suggested that the manufacturer should develop their software such that there will be some time delay for activation of this tamper feature and during that period only the meter cover should be fitted. The delay in activation of software shall be for one instance only. After the meter cover is fitted, it shall get activated immediately without any delay on LCD display in blinking mode so that it is easily noticed by the meter reader. The above tamper shall detectable even in power off condition.

b. Unbalance/Missing Potential : The meter shall be capable of

recording occurrences of missing potential phase wise which can happen either owing to a fuse blowing or due to internal disconnection of a potential lead and its restoration with date and time along with total number of such occurrences during the above period. Further if the voltage falls below 68% of the rated voltage the same shall be recorded.

c. Current Unbalance: The meters shall indicate load unbalance over

and above 30% between the phases when loads in all three phases are above 20% of In.The meter shall be capable of detecting and recording occurrence and restoration with date and time and time of first such occurrences and last restoration along with total number of such occurrences during the above period phase wise.

d. CT shorting/bypassing: The meter must have capability to record

shorting/bypassing of one or any phases of the meter with the time and duration.

Bidders may indicate logic for the above tamper detection and logging scheme.

e. Magnetic Tamper: The meter should record energy with in

specified limit as per CBIP-88 latest amendments in presence of stray magnetic field and record the influence of abnormal magnetic field with date and time in the memory.

[26] f. Neutral Disturbance: The meter shall continue to record accurately even if the neutral from both incoming and outgoing side of supply is accidentally or incidentally disconnect. Meter shall also record correctly in case AC/DC high frequency signal is injected in the neutral circuit of the meter. g. Over Current – When load condition at any phase i.e. Line current at any phase goes more than defined limit i.e 120% of In , this will be detected as Over current condition. h. Over Voltage – When voltage of any phase goes more than defined limit i.e.,120% of Vref, this will be detected as over voltage condition. i. Under voltage - When voltage of any phase goes less than defined limit i.e.,68% of Vref, this will be detected as under voltage condition.

In BCS the snap shot feature is to be provided for every meter tamper data with cumulative Kwh, Kvah, V, I & Date & time at the time of the tamper occurrence & tamper restoration. A summary report on tamper events along with its total duration for each type of the events occurred from the date of manufacturing or installation is to be made available as detailed in Annexure-

17.2.2 It shall not be possible to change the basic meter software by

any means in the field. Moreover critical events like time set, MD reset type, and tariff change shall be logged by the meter. Such events shall be logged in roll over mode for up to twenty numbers.

17.3 The No. of tamper information / events for each type of tamper to be

recorded in three blocks under each category is as follows: Block I: 1. Voltage missing (30) 2. Voltage unbalances (30) Block II: 3. Current unbalance (40) 4. Current circuit short (10) 5. Current reversal (10) Block III: 5. Software (settings and parameters) change – (20) events with date and

time along with parameter changed. 6. Neutral Disturbance (19).

7. Cover opening (1).

8. Magnetic influence events (10)

9. Power failure (30)

[27]

200 tamper information (FIFO basis) shall be available in the memory for retrieval from the meter at any time. The above tamper in EACH BLOCK information is of First In First Out basis but the first tamper occurrence with date should appear till the tamper persist. The above shall be selectable and will be in line with GUIDELINE DOCUMENT: Data Exchange for Electricity Meter Reading, Tariff and Load Control –Companion Specification. 18.0. SELF DIAGNOSTIC FEATURE:

The meter shall have indications for unsatisfactory / non functioning of the following:

(i) Time and Calendar. (ii) Real Time Clock (RTC) Battery status while downloading at BCS end. (iii) All display segments. (iv) Non volatile Memory status while downloading at BCS end (v) Internal Backup battery/super capacitor Status

19.0. RESPONSIBILITY: The meter software suitable to Common Meter Reading Instruments shall be provided with ordered meters to Common M.R.I. manufacturer approved by Board as detailed in CBIP technical Report 111, May 1997 and as detailed elsewhere in the specification.

Besides, they should supply meter optical sensor terminating into a 9 pin ‘D’ type male connector with a cable of minimum 1000 mm +/- 10 mm length as per C.B.I.P. Report 111 May 1997 at free of cost .

The meter shall be completely factory sealed except the terminal block cover. The provision shall be made on the Meter for only two seals to be put by utility user. The Terminal cover should be transparent with sealing arrangement.

As such meter manufacture have to depute Hardware Engineers and Software Engineers on call basis, who should have thorough knowledge of meter hardware/software used for downloading and converting so as to discuss the problems if any or new development in the hardware/software with MRT Engineers(Dist) without any additional charge. The list of Engineers available for the above service shall be furnished along with the bid.

[28] 20.0 GUARANTEE: The meter shall have a design life of at least 5 years and supplier shall be made responsible to replace free of cost if it’s fail. 21.0 Display Sequence:

The following parameters shall be displayed on suitable selection through push button:

As per ANNUXURE 21.1 Load survey capability and billing point requirements:

The meter shall be capable of recording 15 minutes average of the following parameters for at least last 45 days.

1. Imp WH 2. Exp WH 3. Imp Var lag Q1 4. Imp Var Lead Q2 5. Exp Var Lag Q3 6. Exp Var Lead Q4 7. Imp MD KW 8. Exp MD KW 9. AVG Volt Ph A 10. AVG Volt Ph B 11. AVG Volt Ph C 12. AVG Current Ph A 13. AVG Current Ph B 14. AVG Current Ph C 15. Total Energy Imp VAR High 16. Total Energy Imp VAR Low 17. Total Energy Exp VAR High 18. Total Energy Exp VAR Low 19. AVG Frequency 20. Frequency Code

15-minute average of the above parameters shall be available for last forty five (45) days. It shall be possible to select either demand or energy view at the BCS end. The load survey data shall be made available in the form of bar charts as well as in spread sheets at the BCS end. The BCS shall have the facility to give the complete load survey data both in numeric and graphic form. All the 96 blocks shall be recorded for data indication on block day and no supply period also shall be recorded as zero.

[29] 21.2 Billing Parameters:

All billing parameters shall be transferred to billing registers; the parameter shall be

Active energy import Active energy export Reactive energy import Reactive energy Export Apparent energy / maximum demand while active import . Apparent energy / maximum demand while active export. Cumulative Reactive energy for the voltage high condition. Cumulative Reactive energy for the voltage low condition.

Provision of Billing parameters and the details of the BCS (Base Computer Software) shall be detailed by the meter manufacturer. 7.12 DAILY MIDNIGHT PARAMETERS: The meter shall store following end day parameters for last forty five (45) days.

1. Mid night Cum Imp WH (T) 2. Mid night Cum Exp WH (T) 3. Mid night Cum Var High 4. Mid night Cum Var Low 5. Mid night Cum Imp VAR Lag Q1 6. Mid night Cum Imp VAR Lead Q2 7. Mid night Cum Exp VAR Lag Q3 8. Mid night Cum Exp VAR Lead Q4 9. Mid night Cum Imp WH TOD1 10. Mid night Cum Imp WH TOD2 11. Mid night Cum Imp WH TOD3 12. Mid night Cum Imp WH TOD4 13. Mid night Cum Imp WH TOD5 14. Mid night Cum Exp WH TOD1 15. Mid night Cum Exp WH TOD2 16. Mid night Cum Exp WH TOD3 17. Mid night Cum Exp WH TOD4 18. Mid night Cum Exp WH TOD5

Above billing data, load survey data, anomaly information and instantaneous parameters data shall be retrievable through the meter's communication port through a common meter reading instrument (CMRI) and shall be transferred (down loaded) to a PC with windows based software to get complete details for view and print. It should be possible to export the data so collected into MS-EXCEL. The supplier will provide necessary facilities for the same in the base computer resident software. The necessary base computer software (BCS) for this purpose shall be provided with complete details.

&&&&&

[30]

ANNUXURE I LIST OF PARAMETERS REQUIRED FOR INTER FACE METERS FOR BULK METERING SUITABLE FOR ABT 3PH 4WH,3X63.5V,-/1A 0.2s ACCURACY CLASS MODE A 1. Display Test

2. Serial Number

3. Date & Time

4. Cum Imp KWH (+)

5. TOD1 Imp KWH

6. TOD2 Imp KWH

7. TOD3 Imp KWH

8. TOD4 Imp KWH

9. TOD5 Imp KWH

10. Cum Exp KWH (-)

11. TOD1 Exp KWH

12. TOD2 Exp KWH

13. TOD3 Exp KWH

14. TOD4 Exp KWH

15. TOD5 Exp KWH

16. Cum Imp KVARH

17. Cum Exp KVARH

18. Cum Imp KVARH (+)

19. Cum Exp KVARH (-)

20. Imp MD KW

21. Exp MD KW

22. Net KVARH High

23. Net KVARH Low

24. Last 15Min block AVG of Imp KWH

25. Last 15Min block AVG of Exp KWH

26. Last 15Min block AVG Freq

27. Volt Ph A B C

Current Ph A B C

28.Frequency ( Inst)

[31] 29.Power Factor ( Inst)

30.Imp AVG PF

31.Exp AVG PF

32.Total KW (Inst)

33.Total KVAR (Inst)

34.Total KVA (Inst)

35.Cum Reset Count

36.Present CT/PT Status

37.Date & Time of first occurrence of anomaly

38.Date & Time of last restoration of anomaly

39.Total tamper / anomaly count

MODE B

1. Prev. Imp KWH (+)

2. Prev. TOD1 Imp KWH

3. Prev. TOD2 Imp KWH

4. Prev. TOD3 Imp KWH

5. Prev. TOD4 Imp KWH

6. Prev. TOD5 Imp KWH

7. Prev. Exp KWH (-)

8. Prev. TOD1 Emp KWH

9. Prev. TOD2 Emp KWH

10. Prev. TOD3 Emp KWH

11. Prev. TOD4 Emp KWH

12. Prev. TOD5 Emp KWH

13. Prev Imp KVARH

14. Prev Exp KVARH

15. Prev Imp KVAH (+)

16. Prev Exp KVAH (-)

17. Cum MD Imp KW

18. Cum MD Exp KW

[32]

MODE C 1. Cum Imp KWH (+)

2. Cum Exp KWH (-)

3. Cum Imp KVARH

4. Cum Exp KVARH

5. Cum Imp KVAH

6. Cum Exp KVAH

ANNUXURE II LIST OF PARAMETERS REQUIRED FOR INTER FACE METERS FOR WIND MILL HT SERVICES SUITABLE FOR ABT 3PH 4WH,3X63.5V,-/5A 0.2s ACCURACY CLASS MODE A 1. Display Test

2. Serial Number

3. Date & Time

4. Cum Imp KWH (+)

5. TOD1 Imp KWH

6. TOD2 Imp KWH

7. TOD3 Imp KWH

8. TOD4 Imp KWH

9. TOD5 Imp KWH

10. Cum Exp KWH (-)

11. TOD1 Exp KWH

12. TOD2 Exp KWH

13. TOD3 Exp KWH

14. TOD4 Exp KWH

15. TOD5 Exp KWH

16. Cum Imp KVARH

17. Cum Exp KVARH

18. Cum Imp KVARH (+)

19. Cum Exp KVARH (-)

20. Imp MD KW

[33] 21. Exp MD KW

22. Net KVARH High

23. Net KVARH Low

24. Last 15Min block AVG of Imp KWH

25. Last 15Min block AVG of Exp KWH

26. Last 15Min block AVG Freq

27. Volt Ph A B C

Current Ph A B C

28. Frequency ( Inst)

29. Power Factor ( Inst)

30. Imp AVG PF

31. Exp AVG PF

32. Total KW (Inst)

33. Total KVAR (Inst)

34. Total KVA (Inst)

35. Cum Reset Count

36. Present CT/PT Status

37. Date & Time of first occurrence of anomaly

38. Date & Time of last restoration of anomaly

39. Total tamper / anomaly count

MODE B

1. Prev. Imp KWH (+)

2. Prev. TOD1 Imp KWH

3. Prev. TOD2 Imp KWH

4. Prev. TOD3 Imp KWH

5. Prev. TOD4 Imp KWH

6. Prev. TOD5 Imp KWH

7. Prev. Exp KWH (-)

8. Prev. TOD1 Emp KWH

9. Prev. TOD2 Emp KWH

10. Prev. TOD3 Emp KWH

11. Prev. TOD4 Emp KWH

12. Prev. TOD5 Emp KWH

[34]

13. Prev Imp KVARH

14. Prev Exp KVARH

15. Prev Imp KVAH (+)

16. Prev Exp KVAH (-)

17. Cum MD Imp KW

18. Cum MD Exp KW

MODE C 19. Cum Imp KWH (+)

20. Cum Exp KWH (-)

21. Cum Imp KVARH

22. Cum Exp KVARH

23. Cum Imp KVAH

24. Cum Exp KVAH