Contents · ... Busbar Conductor ACSR 435/55 mm² 44 ... Maximum no-load current % In 0.2 Painting Admiralty ... Maximum current carrying capacity of bushings:

Republic of Kenya Lot 3A Substation Technical Schedules –Substations Kenya Electricity Transmission Company

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Kenya Power Transmission System Improvement Project PROJECT NO: P- KE-FA0-004-5083020 | March 2012

Contents DEFINITIONS AND ABBREVIATIONS 2 Table 1: 132/33 kV 23 MVA Power Transformers and On-Load Tap Changer 4 Table 2: 132/33 kV 10 MVA Power Transformer – On load Tap changer 11 Table 3: 132/33 kV 15 MVA Power Transformer and On load Tap changer 16 Table 5: 132 kV Circuit Breaker 21 Table 6: 132 kV Isolators with Earthing Switches 25 Table 8: 33kV Outdoor Circuit Breaker 27 Table 9: 33 kV Isolators with Earthing Switches 30 Table 10: 132 kV Voltage Transformer 33 Table 11: 132kV Current Transformer 35 Table 12: 132kV Surge Arresters 38 Table 14:33kV Surge Arresters 42 Table 15:Busbar Conductor ACSR 435/55 mm² 44 Table 16: Busbar Shield Wire 46 Table 17: 33kV Current Transformer 47 Table 18: 33kV Surge Arresters 49 Table 19: 132kV Dead-End and Suspension Insulators - Discs 51 Table 20: 132kV Post-Type Insulators 52 Table 21: 33/0.4kV Auxiliary Transformer 53 Table 22: Low Voltage AC Distribution Panel for Auxiliary Services 55 Table 23: Battery Bank 110 V DC, 300 Ah 57 Table 24: Battery Charger 58 Table 25: Protection Relays 61 Table 26: Telecommunication System 79 Table 27: Control and Monitoring System 81 Table 28: Under Ground Cable 85 Table 29: 132 kV Isolators without Earthing Switches 91 Table 30: 33 kV Isolators without Earthing Switches 93


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DEFINITIONS AND ABBREVIATIONS

The following terms may be met in these Technical Schedules and shall be interpreted as follows:

Hz shall mean hertz

kW shall mean kilowatt

MW shall mean megawatt

VA (kVA, MVA) shall mean volt-ampere (kilo-, mega-)

A (kA) shall mean ampere (kilo-)

V (kV) shall mean volt (kilo-)

W/m shall mean watt per metre

AC shall mean alternating current

DC shall mean direct current

IN shall mean rated (nominal) current

UN shall mean rated (nominal) voltage

Ah shall mean ampere-hours

lm shall mean lumen

lm/w shall mean lumen per watt

min shall mean minute

min. shall mean minimum

(prefix) shall mean micro

rms shall mean root mean square

p.u. shall mean per unit

p/p shall mean peak to peak

T shall mean Tesla

kg shall mean kilogram

N shall mean Newton

l shall mean litre

s or sec. shall mean second

No. shall mean number

dB shall mean decibel

Amp shall mean amperes

F shall mean Farad

oC shall mean centigrade

K shall mean degree Kelvin

m2 shall mean square metre (mm2 for millimetre, etc)

m3 shall mean cubic metre (mm3 for millimetre, etc)

m3/s shall mean cubic metres per second

m shall mean metre

cm shall mean centimetre

mm shall mean millimetre

joules shall mean joules per hour

tonne shall mean metric tonne


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% shall mean percentage

Pascal 1 N/m2

cst shall mean centistoke


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Table 1: 132/33 kV 23 MVA Power Transformers and On-Load Tap Changer

Minimum Requirements Data offered by Bidder

Description Unit Data

Manufacturer to be

specified

Type 3-phase, oil-

immersed,

with on-load

tap changer

Installation outdoor

Rated maximum voltage (Primary / Secondary) kV 145 / 36

Rated service voltage

Primary side (high voltage) kV 132

Secondary side (low voltage) kV 33

Rated no-load voltage at rated frequency on:

HV, principal tapping kV to be

specified

HV, extreme plus tapping kV to be

specified

HV, extreme minus tapping kV to be

specified

LV kV to be

specified

Rated power ONAN

[Performance Guarantee]

MVA 23


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Rated frequency Hz 50

Rated current

Primary side (high voltage) A to be

specified

Secondary side (low voltage) A to be

specified

Vector group Dyn1

Impedance voltage of:

ONAN centre tap % 9.8

Insulation uniform

Type of cooling ONAN

Tapping range ± 1.67%

in ± 8 steps

No-load losses at rated frequency and 100% voltage -

maximum value [Performance Guarantee]

kW to be

specified

Load losses at rated frequency and 100% voltage (75°C)

- maximum value: [Performance Guarantee]

ONAN kW to be

specified

ONAF kW to be

specified

Material of winding copper

Temperature rise at rated power over 40°C maximum

ambient [Performance Guarantee]

oil (upper level) °C 55


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winding °C 60

Rated power frequency withstand voltage HV/LV kV 275/70

Rated lightning impulse withstand voltage:

HV windings kV peak 650

LV windings kV peak 170

Short circuit impedance referred to the first winding in

the following pairs: [Performance Guarantee]

At principal tap: high voltage - low voltage / phase to be

specified

At extreme plus tap: high voltage - low

voltage

/ phase to be

specified

At extreme minus tap: high voltage - low

voltage

/ phase to be

specified

Maximum noise level (Lp) [Performance Guarantee] dB (A) 70

Maximum no-load current % In 0.2

Painting

Admiralty

Grey shade

No. 632 as

per BS 381C

Dimensions

length mm to be

specified

width mm to be

specified


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height mm to be

specified

distance between wheels' centres mm to be

specified

Total weight kg to be

specified

Oil weight kg to be

specified

Applicable standard(s) IEC 60076

IEC 60354

Transformer Bushings

Maximum current carrying capacity of bushings:

HV A 120% of IN

LV A 120% of IN

Rated service voltage of bushings:

HV kV 132

LV kV 33

HV, neutral kV To be

specified

LV, neutral kV to be

specified


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1 minute, 50 Hz dry withstand voltage:

HV bushing kV to be

specified

LV bushing kV to be

specified

TV bushing kV to be

specified

HV, LV neutral bushings kV to be

specified

1 minute, 50 Hz wet withstand voltage:

HV bushing kV to be

specified

LV bushing kV to be

specified

TV bushing kV to be

specified


specified

Impulse withstand voltage:

HV bushing kV to be

specified

LV bushing kV to be

specified


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On-Load Tap Changer

Manufacturer to be

specified

Type to be

specified

Rated current A 175

Rated short-time current

1 second (maximum) kA 31.5

3 seconds kA to be

specified

Step voltage V to be

specified

Number of steps 17

On-load tap changer ±8 x 1.67%

Minimum number of operations operations 200,000

Motor drive

Type to be

specified

Supply voltage V 400/230

Insulation level voltage to earth kV rms to be

specified

Insulation level

Voltage to earth kV rms to be

specified

Impulse test voltage kV peak to be


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specified

One-minute power frequency test voltage

(50 Hz)

kV rms to be

specified

Internal insulation levels / one-minute power frequency

test voltage:

between selected and pre-selected tap kV peak to be

specified

kV rms to be

specified

across fine tap winding kV peak to be

specified

kV rms to be

specified

between phases of fine tap winding kV peak to be

specified

kV rms to be

specified


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Table 2: 132/33 kV 10 MVA Power Transformer – On load Tap changer

Minimum Requirements Data offered by

Bidder Description Unit Data

Manufacturer 2 to be

specified

Type 3-phase, oil-

immersed,

with on-load

tap changer








specified


specified


specified

LV kV to be

specified

Rated power ONAN


MVA 10


Rated current


specified


specified

Vector group Dyn11


ONAN centre tap % 9.8

Insulation uniform




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in ± 8 steps

No-load losses at rated frequency and 100% volt-

age - maximum value [Performance Guarantee]

kW to be

specified

Load losses at rated frequency and 100% voltage

(75°C) - maximum value: [Performance Guarantee]

ONAN kW to be

specified

ONAF kW to be

specified


Temperature rise at rated power over 40°C maxi-

mum ambient [Performance Guarantee]


winding °C 60





Short circuit impedance referred to the first winding

in the following pairs: [Performance Guarantee]


specified

At extreme plus tap: high voltage - low voltage / phase to be

specified

At extreme minus tap: high voltage - low voltage / phase to be

specified



Painting

Admiralty

Grey shade

No. 632 as

per BS 381C

Dimensions

length mm to be

specified

width mm to be

specified

height mm to be


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specified


specified


specified

Oil weight kg to be

specified


IEC 60354



HV A 120% of IN

LV A 120% of IN


HV kV 132

LV kV 33

HV, neutral kV to be

specified


specified


HV bushing kV to be

specified

LV bushing kV to be

specified

TV bushing kV to be

specified


specified


HV bushing kV to be

specified

LV bushing kV to be

specified

TV bushing kV to be


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specified


specified


HV bushing kV to be

specified

LV bushing kV to be

specified

On-Load Tap Changer

Manufacturer to be

specified

Type to be

specified

Rated current A 175



3 seconds kA to be

specified


specified

Number of steps 17



Motor drive

Type to be

specified



specified

Insulation level


specified


specified

One-minute power frequency test voltage (50

Hz)

kV rms to be

specified

Internal insulation levels / one-minute power fre-


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quency test voltage:


specified

kV rms to be

specified


specified

kV rms to be

specified


specified

kV rms to be

specified


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Table 3: 132/33 kV 15 MVA Power Transformer and On load Tap changer



Manufacturer to be

specified

Type 3-phase, oil-

immersed,

with on-load

tap changer








specified


specified


specified

LV kV to be

specified

Rated power ONAN


MVA 15


Rated current


specified


specified

Vector group Dyn11


ONAN centre tap

% 9.8

Insulation uniform



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in ± 8 steps

No-load losses at rated frequency and 100% volt-

age - maximum value [Performance Guarantee]

kW to be

specified

Load losses at rated frequency and 100% voltage

(75°C) - maximum value: [Performance Guarantee]

ONAN kW to be

specified

ONAF kW to be

specified


Temperature rise at rated power over 40°C maxi-

mum ambient [Performance Guarantee]


winding °C 60





Short circuit impedance referred to the first winding

in the following pairs: [Performance Guarantee]


specified

At extreme plus tap: high voltage - low voltage / phase to be

specified

At extreme minus tap: high voltage - low voltage / phase to be

specified



Painting

Admiralty

Grey shade

No. 632 as

per BS 381C

Dimensions

length mm to be

specified

width mm to be

specified


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height mm to be

specified


specified


specified

Oil weight kg to be

specified


IEC 60354



HV A 120% of IN

LV A 120% of IN


HV kV 132

LV kV 33

HV, neutral kV to be

specified


specified


HV bushing kV to be

specified

LV bushing kV to be

specified

TV bushing kV to be

specified


specified


HV bushing kV to be

specified

LV bushing kV to be

specified


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TV bushing kV to be

specified


specified


HV bushing kV to be

specified

LV bushing kV to be

specified

On-Load Tap Changer

Manufacturer to be

specified

Type to be

specified

Rated current A 33



3 seconds kA to be

specified


specified

Number of steps 17



Motor drive

Type to be

specified



specified

Insulation level


specified


specified

One-minute power frequency test voltage (50

Hz)

kV rms to be

specified


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Internal insulation levels / one-minute power fre-

quency test voltage:


specified

kV rms to be

specified


specified

kV rms to be

specified


specified

kV rms to be

specified


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Table 5: 132 kV Circuit Breaker



Manufacturer to be specified

Type of circuit breaker outdoor type

Type of arc quenching medium SF6

Model to be specified

Rated maximum voltage kV 145

Rated service voltage kV 132

Rated lightning impulse (BIL)

(at altitude less than 1000 M)

kV peak 650

Power frequency withstand voltage


kV rms 275


Number of phases 3

Rated current A 1600

Short circuit breaking current kA 31.5

Short time withstand sec. 1

DC component time constant ms 45

Maximum breaking time ms 50

Maximum closing time ms 100

Related short circuit making current kA peak 100

Number of tripping coils 2


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Number of closing coils 1

Rated power of trip coils w

Rated power of closing coil w

Operating sequence - O – 0.3 s – CO –

3 min – CO

Annual rate of gas leakage at normal pressure % ≤ 1%

Minimum creepage distance mm/kV 31

Rated TRV for faults at terminals

TRV crest value to be specified

TRV rate of rise kV 218

Initial TRV kV/s 2

Time to crest of initial TRV kV 1.4

micro s 0.4

First pole to clear factor 1.5

Maximum over voltage factors for any switching duty P.U 2.3

Maximum over voltage factors when interrupting rated

line/cable/capacitor banks charging currents

P.U 2.3

Maximum over voltage factors when switching small

inductive and reactive current

P.U 2.3

Maximum time interval between closure of first and

last phase of three phase circuit breaker

ms 3

Minimum time from extinction of main arc to contact

make during autoreclsoe time

Operating mechanism


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Type to be specified

Motor voltage V DC 110

Rated power of motor W

Type of device (Motor charged)

-For closing

For opening

Spring or

hydraulic

Closing and opening coil voltage V DC 110


Spring charging time s to be specified

Manual spring release yes

Hand operating facilty yes

Mechanical Interlocking facility with isolators yes

Emergency trip facility yes

Mechanical On and OFF indicators yes

Number of opening coils 2

Number of auxiliary contacts available 5 No., 5 NC

Main dimensions:

Depth mm to be specified

Height mm to be specified

Weight kg to be specified

Accessories in the motor mech. enclosure

Operation counter yes


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Local manual control yes

Test switches (dc) yes

Heater yes

Weatherproof, corrosion resistance enclosure IP65

Accessories in the central control panel

Anti-pumping relay yes

Local/distance command selector switch yes

Local operation push buttons yes

Minimum pressure lock-out and alarm relay yes

Lighting, heating and service plug yes

Terminal blocks yes

Test switches (DC) yes

Phase discrepancy timer relay yes

Mounting brackets and hardware yes

With all necessary accessories for installation to be specified

Applicable standard(s) IEC 62271-100


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Table 6: 132 kV Isolators with Earthing Switches








Rated lightning impulse (BIL)(at altitude less than 1000 M) kV peak 650

Power frequency withstand voltage (at altitude less than 1000 M) kV rms 275

Rated short-time current kA 31.5


Number of poles 3



Operation motorized

Opening time sec. ≤ 30

Closing time sec. ≤ 30

Rated peak withstand current kA 100

Minimum clearance in air:

Between poles mm 1600

To earth mm 1300

For isolating distance mm to be specified

Type of operating mechanism:

For disconnector motor

For earthing switch manual

Rated supply voltage for operating mechanism V DC 110

Current required at rated supply voltage to operate isolator: A to be specified

Hand operating facility yes

Locking arrangement in Off and On yes

Automatic isolation of control supplies when lock off yes

Rated power of operating coil W

Rated Motor power W

Facing of terminals and contacts to be specified

Shape of terminals of the main circuit to be specified

Number and type of auxiliary switches:

Tin plated for Isolator Yes

For the disconnector 5 NO , 5 NC

For the earth switch to be specified

Auxiliary contact rating A > 10

Wind load Pa to be specified


Page | 26




(N/mm²)

Mechanical terminals load:

Straight load N 500

Cross load N 170

Weight of complete disconnector:

With earthing switch kg to be specified

Without earthing switch kg to be specified

Approximate dimensions in open position mm to be specified

Approximate dimensions in close position mm to be specified

With all accessories for installation to be specified

Applicable Standard(s) IEC 62271-102


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Table 8: 33kV Outdoor Circuit Breaker




Type of circuit breaker outdoor type

Type of arc quenching medium Vacuum




Rated lightning impulse (BIL)


kV peak 170



kV rms 70


Number of phases 3

Rated current

Incomers and feeders

Bus coupler

A

800

1200

Short circuit breaking current kA 25

6.0 Short time withstand sec. 1

7.0 DC component time constant ms 45

Maximum breaking time ms 50

Maximum closing time ms 120

Related short circuit making current kA peak 62.5


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Number of tripping coils 2


Operating sequence - O - 0.3 s - CO - 3

min - CO

Annual rate of gas leakage at normal pressure % ≤ 1%


Operating mechanism

8.0 Type to be specified

9.0 Motor voltage V DC 110

10.0 Motor power rating KW to be specified

11.0 Closing and opening coil voltage V DC 110

12.0 Number of closing coils 1

13.0 Number of opening coils 2

14.0 Spring charge time

s to be specified

15.0 Manual release spring yes

16.0 Hand operating facility yes

17.0 Emergency trip facility yes

18.0 Mechanical Off and On indicators yes

19.0 Number of auxiliary contacts available 5 No., 5 NC

Main dimensions:

20.0 Depth mm to be specified

21.0 Height mm to be specified



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Accessories in the motor mech. enclosure

22.0 Operation counter yes

23.0 Local manual control yes

24.0 Test switches (dc) yes

25.0 Heater yes

Weatherproof, corrosion resistance enclosure IP65

Accessories in the central control panel

26.0 Anti-pumping relay yes

27.0 Local/distance command selector switch yes

28.0 Local operation push buttons yes

29.0 Minimum pressure lock-out and alarm

relay

yes

30.0 Lighting, heating and service plug yes

31.0 Terminal blocks yes

32.0 Test switches (DC) yes

33.0 Phase discrepancy timer relay yes

34.0 Mounting brackets and hardware yes

With all necessary accessories for installation to be specified



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Table 9: 33 kV Isolators with Earthing Switches









Power frequency withstand voltage (at altitude less than 1000 M) kV rms

70

Rated short-time current kA 25


Number of poles 3

Rated current A 800



yes

Automatic isolation of control supplies when lockoff yes

yes


Rated Motor power W


Operation motorized



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6.0 Between poles mm 500

7.0 To earth mm 435

8.0 For isolating distance mm to be specified


9.0 For disconnector Motorised

10.0 For earthing switch manual






11.0 For the disconnector 5 NO , 5 NC

12.0 For the earth switch to be specified


Wind load Pa

(N/mm²)

to be specified


13.0 Straight load N 500

14.0 Cross load N 170



Page | 32




15.0 With earthing switch kg to be specified

16.0 Without earthing switch kg to be specified






Page | 33


Table 10: 132 kV Voltage Transformer



Manufacturer's name to be indicated




Execution


Rated primary voltage kV 132/√3

Rated secondary voltage (second winding) kV 0.1/√3

Rated secondary voltage (third winding) kV 0.1/√3


Impulse withstand voltage 1.2/50 micro s wave


kV peak 650



kV rms 275

Power frequency withstand voltage secondary

winding

kV rms 2

Rated output (second winding/ third winding): VA 100/100

Accuracy class

6.0 For metering 0.2

7.0 For measuring 0.5

8.0 For protection 3P

Voltage factor at rated voltage:

9.0 Continuous 1.2

10.0 30 second 1.5

Thermal limit burden VA to be specified

Normal temperature rise: 28

11.0 Winding °C 50

12.0 Oil °C 45

Maximum temperature rise under short circuit con-

ditions:

13.0 Winding °C to be specified

14.0 Oil °C to be specified

Total height mm to be specified

Minimum creepage distance: mm/kv 31

Size and section of terminals bolts mm to be specified

Weight of oil per pole kg to be specified

Weight total per pole kg to be specified


Page | 34




Type of oil and reference specification to be specified

Permissible secondary short circuit current A to be specified


60044-5


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Table 11: 132kV Current Transformer









Rated lightning impulse (BIL) (at altitude less than 1000 M) kV 650

Power frequency withstand voltage (at altitude less than 1000 M) kV 275


Rated primary current

6.0 for line feeder A 800 - 400 - 200

7.0 for transformer feeder A 800 - 400 - 200

Rated secondary currents A 1 - 1 - 1

Number of cores:

8.0 for measuring purposes 1

9.0 for metering purposes 1

10.0 for protection purposes 2

11.0 for busbar purposes 1

Rated burden for measuring core VA 15

Accuracy class 0.5 M 5

Rated burden for metering core VA 30


Page | 36




Accuracy class 0.2

Rated burden for protection cores VA 30

Accuracy class 5 P 20

Rating for Diferential, Busbarandd Restricted earth fault cores VA 30

Accuracy i) Class

ii)Vk

iii)Im at

Vk

to be specified

Short-time current ratings:

12.0 Thermal (Ith) kA 31.5

13.0 Dynamic (Idyn) kA 80

The minimum guaranteed instrument security factor, for metering

current transformer

to be specified

Impulse wave to be specified

Mechanical load of primary terminal:

14.0 Dynamic load N to be specified

15.0 Static load N to be specified

Minimum clearance mm to be specified


Size and section of terminal bolts to be specified

Weight per pole kg to be specified




Page | 37




Dimensions mm to be specified




Page | 38


Table 12: 132kV Surge Arresters






Nominal system voltage kV 132

Rated operating voltage (Ur) kV 108

Rated continuous operating voltage (Uc) kV 84


Nominal discharge current kA 10

Residual voltage for:

6.0 Lightning current 8/20 impulse kV to be specified

7.0 Step current 1/20 impulse of 10 kA kV to be specified

Switching current 30/60 impulse of 500 A/1000 A kV to be specified

High current 4/10 impulse withstand value kA 100

Low current, long duration current impulse withstand

(upper value)

A 1000

Line discharge class 3

Absorption capability in kJ/kV of arrester rating at

thermal stability

kJ/kV 8

Pressure relief class class A

Suitability for fault current kA 40

Power frequency 1 min. withstand voltage, wet (at kV 275


Page | 39




altitude less than 1000 M)

Maximum RIV at 1000 kHz measured at 1.05 time the

system highest voltage

micro V 500

Impulse withstand voltage of arrester insulation

external assembly (at altitude less than 1000 M)

kV crest 650

Maximum short circuit rating kA 31.5

Overall height of arrester mm to be specified

Creepage distance mm/kV 31

Weight of arrester kg to be specified

Arrester classification heavy duty, station-

type gapless metal

oxide or equivalent

Accessories: 132 kV surge arrester discharge counter

8.0 Type outdoor

9.0 Counter indication digital

10.0 Protection class IP 54

11.0 Number per 3 arresters 1

Applicable Standard(s) IEC 60099-1, 1A, 2,

4


Page | 40


Table 13: 33kV Voltage Transformer







Execution


Rated primary voltage kV 33/√3

Rated secondary voltage (second winding) kV 0.1/√3

Rated secondary voltage (third winding) kV 0.1/√3


Impulse withstand voltage 1.2/50 micro s wave


kV peak 170



kV rms 70

Power frequency withstand voltage secondary

winding

kV rms 2

Rated output (second winding/ third winding): VA 100/100

Accuracy class

6.0 For metering 0.2

7.0 For measuring 0.5

8.0 For protection 3P

Voltage factor at rated voltage:

9.0 Continuous 1.2

10.0 30 second 1.5

Thermal limit burden VA to be specified

Normal temperature rise: 28

11.0 Winding °C 50

12.0 Oil °C 45

Maximum temperature rise under short circuit con-

ditions:

13.0 Winding °C to be specified

14.0 Oil °C to be specified

Total height mm to be specified

Minimum creepage distance: mm/kv 31

Size and section of terminals bolts mm to be specified


Weight total per pole kg to be specified



Page | 41




Permissible secondary short circuit current A to be specified

Applicable standard(s) IEC 60044-2,

60044-5


Page | 42


Table 14:33kV Surge Arresters
















Low current, long duration current impulse withstand

(upper value)

A 1000



thermal stability

kJ/kV 8



Power frequency 1 min. withstand voltage, wet kV 70


Page | 43




Maximum RIV at 1000 kHz measured at 1.05 time the

system highest voltage

micro V 500


external assembly

kV crest 170

Maximum short circuit rating kA 25




Arrester classification heavy duty, station-

type gapless metal

oxide or equivalent

Accessories: 132 kV surge arrester discharge counter

8.0 Type outdoor




Applicable Standard(s) IEC 60099-1, 1A, 2,

4


Page | 44


Table 15:Busbar Conductor ACSR 435/55 mm²




Type Aluminium

conductor steel-

reinforced

(ACSR)

Nominal cross-section mm² 435/55

Cross-section ratio Al/St approx. 7.7

Steel

Construction mm 7 x 32

Diameter mm 9.6

Cross-section mm² 56.3

Aluminium

Construction mm 54.32

Cross-section mm² 434.3

Total cross-section mm² 490.6

Conductor diameter approx. mm 28.8

Conductor weight

Steel kg/km 44.1

Aluminium kg/km 1.199

Without grease total approx. kg/km 1.640

With grease total approx. kg/km 1.646

Calculated conductor breaking load N 136.450


Page | 45




Calculated conductor resistance at 20 °C ohm/km 0.067

Standard length per reel approx. m to be specified

Dispatch reel nominal size m to be specified

Current carrying capacity A 2000

Applicable Standard(s) IEC 60209

DIN 48 204


Page | 46


Table 16: Busbar Shield Wire




Material steel galvanized

Cross-section

Nominal cross section mm² 50

Actual cross section mm² 49.48

Number of wires number 7

Wire diameter mm 3.00

Conductor diameter mm 9

Weight: kg/km 391

Calculated conductor braking load kN 61.58 (St III)

Weight of zinc coating g/mm² 5.188

Applicable Standard(s) IEC 60076

IEC 60289


Page | 47


Table 17: 33kV Current Transformer









Rated lightning impulse (BIL) (at altitude less than 1000 M) kV 170

Power frequency withstand voltage (at altitude less than

1000 M)

kV 70


Rated primary current

6.0 for line feeder A 400 - 200 - 100

7.0 for transformer feeder A 800 - 400 - 200

Rated secondary currents A 1 - 1 - 1

Number of cones:

8.0 for measuring purposes 1

9.0 for metering purposes 1

10.0 for protection purposes 2

Rated burden for measuring core VA 30

Accuracy class 0.5 M 5

Rated burden for metering core VA 30


Page | 48




Accuracy class 0.2

Rated burden for protection cores VA 30

Accuracy class 5 P 20

Short-time current ratings:

11.0 Thermal (Ith) kA 25

12.0 Dynamic (Idyn) kA 60

The minimum guaranteed instrument security factor,

for metering current transformer

to be specified

Impulse wave to be specified

Mechanical load of primary terminal:

13.0 Dynamic load N to be specified

14.0 Static load N to be specified


Size and section of terminal bolts to be specified

Weight per pole kg to be specified



Dimensions mm to be specified




Page | 49


Table 18: 33kV Surge Arresters
















Low current, long duration current impulse with-

stand (upper value)

A 1000



thermal stability

kJ/kV 8



Power frequency 1 min. withstand voltage, wet kV 70

Maximum RIV at 1000 kHz measured at 1.05 time

the system highest voltage

micro V 500


external assembly

kV crest 170

Maximum short circuit rating kA 25




Arrester classification heavy duty,

station-type

gapless metal

oxide or

equivalent

Accessories: 132 kV surge arrester discharge

counter

8.0 Type outdoor


Page | 50







Applicable Standard(s) IEC 60099-1, 1A,

2, 4


Page | 51


Table 19: 132kV Dead-End and Suspension Insulators - Discs




Material

porcelain, glass

disc, composite

polymer

Rated maximum voltage (String) kV 145

Service voltage (String) kV 132

Individual Disc Data

Disc diameter (minimum) mm 254

Spacing mm 146

Flashover values:

Power frequency voltage kV rms 132

Power frequency

6.0 Dry kV 95

7.0 Wet kV 55

Lightning impulse:

8.0 Positive kV 125

9.0 Negative kV 130

Radio interference voltage (RIV):

10.0 Test voltage to ground kV 10

11.0 Max. RIV at 1000 kHz micro V 50

Nominal creepage distance mm 432

Dry arcing distance mm 203.2

Weight: kg to be indicated

Accessories: to be indicated

12.0 Clevis

13.0 Tongue fittings

ANSI class 52.6

Applicable Standard(s) IEC 60016,

IEC 60305,

IEC 60433,

IEC 60076,

IEC 60289


Page | 52


Table 20: 132kV Post-Type Insulators




Material porcelain or

polymer ,

composite

polymer




Lightning impulse withstand voltage (at altitude less

than 1000 M)

kV peak 650

Power frequency 1 min. withstand voltage (at

altitude less than 1000 M)

kV 275

Maximum RIV at 1000 kHz micro V 500

Nominal creepage distance mm/kV 31

Mechanical values:

6.0 Cantilever kg 800

7.0 Tensional strength kgm 400

Weight: kg to be specified

Accessories: to be specified

8.0 Connectors

9.0 Joints

10.0 Clamps

Applicable Standard(s) IEC 60016,

IEC 60168,

IEC 60865,

IEC 60273

DIN 48 013


Page | 53


Table 21: 33/0.4kV Auxiliary Transformer




Type 3-phase, oil-

immersed

Installation indoor

Maximum Opering Voltage kV 36 / 0.430

Rated service voltage:

6.0 Primary side (high voltage) kV 33

7.0 Secondary side (low voltage) kV 0.4

Rated power kVA 100


Rated current:

8.0 Primary side (high voltage) A 2

9.0 Secondary side (low voltage) A 5

Vector group Dyn11

Impedance voltage % 4


Off-load tap changer regulation ± 2 x 2.5%

Losses:

10.0 No-load losses W to be specified

11.0 Load losses W to be specified

Rated power frequency withstand voltage kV 70

Rated lightning impulse withstand voltage kV peak 170


Page | 54




Sound power level dB (A) 68

Painting

Admiralty Grey

shade No. 632 as

per BS 381C

Dimensions:

12.0 Length mm to be specified

13.0 Width mm to be specified

14.0 Height mm to be specified

15.0 Distance between the wheel's centres mm to be specified

Total weight kg to be specified

Oil weight kg to be specified



Page | 55


Table 22: Low Voltage AC Distribution Panel for Auxiliary Services



General

Manufacturer's name to be specified

Type metal clad, in-

door, air insu-

lated

Installation indoor

Rated Voltage V 400/230


Busbar

Rated currents A to be specified

Material copper

Short-circuit current (1 s.) kA 10

Number of 3-phase outgoings to be specified

Number of 1-phase outgoings to be specified

Protection IP 4X

Equipment

16.0 Main 3-phase 4-poles moulded case

circuit breakerfor incoming feeder

to be specified

17.0 3 current transformer to be specified

18.0 3-phaseactive energy meter to be specified

19.0 1 AC current meter to be specified

20.0 1 current switch, 3 positions to be specified

21.0 1 AC volt meter to be specified

22.0 1 rotary voltage switch, 7 positions to be specified


Page | 56




23.0 3-phase 4-pole moulded case circuit

breaker for outgoing feeders

to be specified

24.0 1-phase 2-pole moulded case

circuitbreaker for outgoing feeders

to be specified

25.0 1 outlet socket 220 V, 50 Hz, 10 A to be specified

Dimensions

26.0 length mm to be specified

27.0 height mm to be specified

28.0 depth mm to be specified



IEC 60439

VDE 0100


Page | 57


Table 23: Battery Bank 110 V DC, 300 Ah




Type sealed OPzV, lead-

acid, tubular plate,

electrolyte in gel

form


Installation indoor, vertically on

racks

Electrolyte sulphuric acid, fixed

as gel

Container lid styrene acrylonitrile

(SAN) plastic

Positive electrodes tubular plate, lead

calcium alloy

Connector technique bolted connectors,

completely insulated

Number of cells to be specified

Nominal voltage V DC 110

Nominal capacity at 10 hour discharge rate Ah 300

Float voltage per cell V to be specified

Float charging current A to be specified

Boost charging voltage per cell V to be specified

Boost charging current A to be specified

Battery voltage at end of duty cycle V to be specified

Short circuit current A to be specified

Internal resistance to be specified

Life expectancy years ≥ 20

Cycling capacity cycles > 1,200

Weights and dimensions:

6.0 total weight of battery (incl. electrolyte) kg to be specified

7.0 weight per cell (incl. electrolyte) kg to be specified

8.0 width x depth x height per cell mm to be specified


IEC 61056


Page | 58


Table 24: Battery Charger




Type 2 full capacity redun-

dant


Design fully electronic stan-

dard design

Characteristics I/U characteristic

with high tempera-

ture stability

Circuit configuration 3-phase full wave

bridge circuit

Installation indoor, in metal-clad

cubicles with front

door; all equipment

accessible from the

front side

Protection class IP41

AC supply:

29.0 Rated service voltage V 400/230

30.0 Frequency Hz 50

31.0 Rated current A to be specified

DC output:

32.0 Rated service voltage V 110

33.0 Voltage setting range % ±5

34.0 Float charging voltage V 125 (at 2.23 V/cell)

35.0 Boost charging voltage V 2.4 per cell

36.0 Regulation error of output voltage:

- at load variation 0-100% % ± 1

- at frequency variations 50 Hz % ± 5

- at input voltage variation % ± 10

37.0 Output voltage regulation with current

limiting range

±2% within voltage

range of 80-100%

38.0 Regulation characteristic I/U as per DIN

41773 or equivalent

39.0 Ripple content % < 10 (pp) without

battery

40.0 Permissible humidity acc. to IEC

41.0 Radio interference "A" according to EN


Page | 59




55011

42.0 Derating factor (thyristors) 2.3 as per VDE

0160

43.0 Cooling natural circulation

44.0 Fuse switch disconnector (charger output) to be specified

45.0 Control unit with integrated mains filter,

phase failure supervision, soft start facility,

pulse blocking, cut-in delay

to be specified

Monitoring devices:

46.0 Detailed fault alarm including collective

fault alarm and additional visual signalling at

front door

to be specified

47.0 Three-phase overvoltage and

undervoltage supervision

to be specified

48.0 Current-controlled DC undervoltage

supervision

to be specified

49.0 DC overvoltage supervision with

delayed/undelayed cut-off

to be specified

50.0 Integrated supervision of thyristor fuses to be specified

51.0 Fuse supervision of auxiliary and control

circuits

to be specified

52.0 Ripple monitoring to be specified

53.0 Time to recharge battery to 80% capacity

from fully discharged state

hour 10

Measuring:

54.0 Volt meter and ammeter (charger output) to be specified

55.0 Battery tension, consumer tension to be specified

56.0 Charger current, consumer current to be specified

Disturbance reports:

57.0 Main failure, rectifier tensions too low to be specified

58.0 Battery circle too low, rectifier tension too

high, battery deeply unloaded

to be specified

59.0 Battery circle disturbed, ground fault

plus/minus

to be specified

60.0 Capacity test negative, short circuit to be specified

Efficiency % 80


Width x depth x height mm to be specified


IEC 60364


Page | 60




IEC 60439

IEC 60947


Page | 61


Table 25: Protection Relays


Bidder Description- Protection and indication system Unit Data

LINE DIFFERENTIAL PROTECTION AND BACK

UP DISTANCE (87l/21)


Type reference

Relay design (microprocessor based, numerical) Numerical

Auxialliary Voltage range (Vn= 110 V dc Vdc 77-150

Input frequency range (50Hz Nominal) Hz 47.5-52.5

Differential protection requirements

Phase segregated protection Yes

Ratio and Vector correction for CTs Yes

Adjustable biased differential protection

characteristics

yes

Sensitivity

- For phase faults

- For earth faults

- Operating time

ms <30

Distance protection requirements

3 zone ph-ph&ph-E yes

Phase fault & Earth fault characteristic shapes

(Mho, Quad)

yes

Operating time ms <30

SOTF Yes

Power swing Blocking ( depending on relaying

point in the power system

yes

Voltage transformer supervison yes

time delay for all zones yes

Zone enable/disable for all zones yes

Other requirements

Thermal overload, 49 no

Circuit breaker failure 50BF (dependent on

application)

yes

Event recording function yes

Disturbance recording function yes

Fault locator function yes

Intergral operator interface for local interrogation yes

Programmable scheme logic yes


Page | 62




User friendly HMI, Window based software for

relay setting, relay configuration and event,

disturbance and fault record management .

yes

carry continuous current 1A yes

Make 6A max. for 0.2s yes

Break dc 50W resistive

25W inductive (L/R 40ms)

yes

Self checking facility yes

Intergralintertrip send and receive, with external

input interface

yes

Communications

Protection

Direct optical fibre 1300nm single mode

yes

Control

Communication ports ( Front/rear etc)

(Note: Two Rear ports for NCC and RCC)

Physsical links (R485/Fibre optic)

Protocol supported

- IEC 60870-5-101

- IEC 61850

yes

Type tests

Atmospheric

Operation -25C and 55C for 96hrs, IEC 60068-2-1

Transport/storage – 25 and 70C for 96 hrs, IEC

60068-2-

yes

Relative Humidity

Operation at 93%

Tested to IEC 60068-2-3 with severity class 56

days

yes

Enclosure

IEC 60529 IP50

yes

Mechanical Environment

Vibration IEC 60255-21-1

Shock and bump IEC 60255-21-2

Seismic IEC 60255-21-3

Yes Yes yes

Insulation

Rated Insulation

1000V high impedance protection CT inputs

250V for other circuits

1000V open contact withstand Dielectric tests

IEC 60255-5-Series C of table 1

Yes

Yes


Page | 63




Impulse voltage

IEC 60255-5 test voltage 5kv

yes

Electromagnetic compatibility

1Mhz Burst disturbance test,

IEC 60255-22-1 severity class II

Electrostatic discharge

IEC 60255-22-2 severity class III

Radiated Electromagnetic field Disturbance


Test method A, 27Mhz through 500Mhz

Electromagnetic Emissions

IEC 60255-25

Fast transient disturbance

IEC 60255-22-4 severity level Iv

Type test certificates to be provided

Yes

Yes

Yes

Yes

Yes



DISTANCE PROTECTION (21)


Type reference




Distance protection requirements

3 zone ph-ph&ph-E yes

Phase fault & Earth fault characteristic shapes

(Mho, Quad)

yes

Operating time ms <30

SOTF Yes

Power swing Blocking ( depending on relaying

point in the power system

yes

Voltage transformer supervision yes

Time delay for all zones yes

Teleprotection modes PUR/POR/Block yes

DEF plain and Blocking modes yes

Z1 min and max operating time (mid Zone)

Zone enable/disable for all zones yes

Other requirements

Thermal overload, 49 no

Circuit breaker failure 50BF- (dependent on yes


Page | 64




application)



Fault locator function yes

Integral operator interface for local interrogation yes





yes





yes


Integral inter-trip send and receive, with external

input interface

yes

Communications

Protection


yes

Control



Physical links (R485/Fibre optic)

Protocol supported

- IEC 60870-5-101

- IEC 61850

yes

Type tests

Atmospheric



60068-2-

yes

Relative Humidity

Operation at 93%


days

yes

Enclosure

IEC 60529 IP50

yes





Yes Yes yes


Page | 65




Insulation

Rated Insulation





Impulse voltage


Yes

Yes

yes










IEC 60255-25




Yes

Yes

Yes

Yes

Yes



LOW IMPEDANCE BUSBAR PROTECTION

INCLUDING BREAK FAILURE PROTECTION


Type reference


Auxiliary Voltage range (Vn= 110 V dc Vdc 77-150


State principle of operation i.e. low impedance

Integral check zone feature (state principle of

operation)

Yes

Distributed bay modules and central Unit (Y/N) Yes

Maximum number of bays yes

- Isolator replica ms <30

CT saturation detector and stabilisation

Integral CT Supervision yes

CT matching Functions yes

Phase segregated protection ms <30


Page | 66




Two stage breaker failure

Phase faults

Earth fault

Facility to initiate the scheme by auxialiary contacts

I,eBucholz operation

2 out 4 check of current detectors Independently

settable delay times for operation with and without

current

Input trip contact

Yes

Yes

Yes

Yes

Other requirements




yes





yes



input interface

yes

Communications

Protection


yes

Control



Physical links (R485/Fibre optic)

Protocol supported

- IEC 60870-5-101

- IEC 61850

yes

Type tests

Atmospheric



60068-2-

yes

Relative Humidity

Operation at 93%


days

yes

Enclosure yes


Page | 67




IEC 60529 IP50





Yes Yes yes

Insulation

Rated Insulation





Impulse voltage


Yes

Yes

yes










IEC 60255-25




Yes

Yes

Yes

Yes

Yes



Multifunction Overcurrent & Earth fault

protection (50/51/50N/51N


Type reference




Number of phase CT inputs

Number of earth fault CT inputs

Standard, Very and Extreme inverse and definite

time characteristics curves conforming to

IEC60255

Yes

Number of inverse overcurrent functions per phase


Page | 68




Number of high set overcurrent functions per phase

Number of low set overcurrent functions per phase

Number of inverse earth fault functions

Number of high set earth fault functions

Number of low set earth fault functions

Number of group setting

Earth fault element suitable of high impedance

REF (with external resistor)

Yes

operating time at 5X setting when configured for

REF

ms 30

Suitable for Blocked overcurrent busbar protection

scheme

yes

Other requirements

Thermal overload, 49 (Y/N)

Directional O/C and E/F (Y/N)

Number of output relays

Rated for tripping

Rated for control and alarm

Integral metering functions yes

Opto-isolator inputs yes








yes





yes



input interface

yes

Communications

Protection


yes

Control



yes


Page | 69




Physical links (RS485/Fibre optic)

Protocol supported

- IEC 60870-5-101

- IEC 61850

Type tests

Atmospheric



60068-2-

yes

Relative Humidity

Operation at 93%


days

yes

Enclosure

IEC 60529 IP50

yes





Yes Yes yes

Insulation

Rated Insulation





Impulse voltage


Yes

Yes

yes










IEC 60255-25




Yes

Yes

Yes

Yes

Yes



Page | 70


Description- Protection and indication system Unit Data Bidder

Multifunction Directional Overcurrent & Earth

fault protection (50/51/50N/51N


Type reference




Number of phase CT inputs

Number of earth fault CT inputs

Three phase VT input

Method of determining zero sequence voltage

Broken delta VT input (Y/N)

Derived mathematically (Y/N)

Standard, Very and Extreme inverse and definite

time characteristics curves conforming to

IEC60255

Yes

Number of inverse DOC functions per phase

Number of high set DOC functions per phase

Number of low set DOC functions per phase

Number of inverse DEF functions

Number of high set DEF functions

Number of low set DEF functions

Number of group setting

Other functions provided

Non directional O/C 50/51 (Y/N)

Non directional E/F 50N/51N (Y/N)

Thermal Overload 49 (Y/N)

Suitable for Blocked overcurrent busbar

protection scheme

Earth fault element suitable of high

impedance REF (with external resistor)

Number of output relays

Rated for tripping

Rated for control and alarm

Yes

Other requirements

Integral metering functions yes

Opto-isolator inputs yes






Page | 71







yes





yes



input interface

yes

Communications

Protection


yes

Control




Protocol supported

- IEC 60870-5-101

- IEC 61850

yes

Type tests

Atmospheric



60068-2-

yes

Relative Humidity

Operation at 93%


days

yes

Enclosure

IEC 60529 IP50

yes





Yes Yes yes

Insulation

Rated Insulation





Yes

Yes


Page | 72




Impulse voltage


yes










IEC 60255-25




Yes

Yes

Yes

Yes

Yes



TRANSFORMER DIFFERENTIAL PROTECTION


Type reference






Ratio and Vector correction for CTs Yes

Adjustable biased differential protection

characteristics

yes

Sensitivity

- For phase faults

- For earth faults

- Operating time

ms <30

5th

Harmonic restraint yes

Other requirements

High set element yes

Magnetising current inrush restraint yes

Measurement and indication on MMI of phase HV

and LV differential and bias current

yes

Separate function that performs overfluxing Yes


Page | 73




protection with trip and alarm functions

Overcurent and earth fault yes



Latching output contact yes






yes





yes



input interface

yes

Communications

Protection


yes

Control




Protocol supported

- IEC 60870-5-101

- IEC 61850

yes

Type tests

Atmospheric



60068-2-

yes

Relative Humidity

Operation at 93%


days

yes

Enclosure

IEC 60529 IP50

yes




Yes


Page | 74




Seismic IEC 60255-21-3 Yes yes

Insulation

Rated Insulation





Impulse voltage


Yes

Yes

yes










IEC 60255-25




Yes

Yes

Yes

Yes

Yes



TRANSFORMER RESTRICTED EARTH FAULT

PROTECTION


Type reference






Principal of operation – high impedance yes

Ratio correction for CTs Yes

Stabilising resistor and voltage dependent resistor

included

yes

Sensitivity

- For earth faults

ms <25


Page | 75




- Operating time at 5X

reject harmonics produced by CT saturation yes

Other requirements



Latching output contact yes






yes





yes



input interface

yes

Communications

Protection


yes

Control




Protocol supported

- IEC 60870-5-101

- IEC 61850

yes

Type tests

Atmospheric



60068-2-

yes

Relative Humidity

Operation at 93%


days

yes

Enclosure

IEC 60529 IP50

yes




Page | 76






Yes Yes yes

Insulation

Rated Insulation





Impulse voltage


Yes

Yes

yes










IEC 60255-25




Yes

Yes

Yes

Yes

Yes



TRIP CIRCUIT SUPERVISION


Type reference

Relay design(Electro-mech, static, numerical)


Operating time ms

Supervision of the whole trip circuit with CB open

and closed

Relay operated indicator

Type tests

Atmospheric



60068-2-

yes

Relative Humidity yes


Page | 77




Operation at 93%


days

Enclosure

IEC 60529 IP50

yes





Yes Yes yes

Insulation

Rated Insulation





Impulse voltage


Yes

Yes

yes










IEC 60255-25




Yes

Yes

Yes

Yes

Yes



MULTI CONTACT TRIPPING RELAYS


Type reference


Is relay mechanically latched or self resetting

Method used to reset latched relay (Hand or

electrical0

Minimum voltage at which reliable operation occurs Yes


Page | 78








yes

Relay operated indicator type yes

Type tests

Atmospheric



60068-2-

yes

Relative Humidity

Operation at 93%


days

yes

Enclosure

IEC 60529 IP50

yes





Yes Yes yes

Insulation

Rated Insulation





Impulse voltage


Yes

Yes

yes


1Mhz Burs disturbance test,








IEC 60255-25




Yes

Yes

Yes

Yes

Yes


Page | 79


Table 26: Telecommunication System



Applicable standards for insulation / EMC / ESD

tests:

6.0 Protection IEC 60265-4, -

5, -6 (22-1, -2, -

3, -4) class III

IEC 6081-1, -2,

-3, -4

IEC 60834-1

7.0 Telecontrol IEC 60255-4, -

5, -6, class II/III

IEC 60801-1, -

2, -3, -4

IEC 60870-1, -

2, -3, -4

OLTE transceiver characteristics:

8.0 Optical wave length nm 1550 or 1310

9.0 Optical source laser

10.0 Optical source life span better than 15

years

11.0 Optical fibre type single mode

12.0 Optical connectors Type FC-PC

13.0 Jitter performance: ITU-T recom-

mendation

G.823

14.0 Power supply V 48 V DC

15.0 Capacity Mbps 8

Digital multiplexers:

16.0 spare channel capacity after

commissioning on each transmission section

(both main and backup)

≥ 30%

Optical fibre salient characteristics:

17.0 Number of fibres 48 minimum

18.0 Core diameter m 8.3 or 9 with a

± 3% tolerance

19.0 Cladding design m either matched

or depressed

20.0 Clad diameter m 125.0 ± 2

21.0 Core-clad concentricity less than 2%

22.0 Coating diameter m 250 ± 15

23.0 Coating concentricity ≥ 0.7


Page | 80




24.0 Attenuation:

1310 nm dB/km ≤ 0.40

1550 nm dB/km ≤ 0.22

25.0 Bending attenuation:

1310 nm (75 mm) dB ≤ 0.05 (100

turns)

1550 nm (75 mm) dB ≤ 0.10 (100

turns)

26.0 Temperature dependence dB/km ≤ 0.05 (-20 to

+85°C)

27.0 Cut-off wave length nm ≤ = 1250

Chromatic dispersion:

28.0 Zero dispersion at: nm 1310 ± 12

29.0 Zero dispersion slope (max.) ps/nm²/km 0.092

30.0 Zero dispersion at nm 1550 ± 15

31.0 Zero dispersion slope (max.) ps/nm²/km 0.085

32.0 Mode field diameter:

1300 nm mm 9.30 ± 0.50

1550 nm mm 10.50 ± 1.00

33.0 IL proof test level g/m² 35 x 106

34.0 Splice attenuation dB/splice 0.02

35.0 Connector loss dB/connector ≤ 0.5

Construction requirements:

36.0 Transmission parameters:

Bit error rate (path including terminals at n x 2

Mbit/s

< 1 x 10-10

Jitter performance n x 2 Mbit/s acc. to G.823

Teleprotection interface (test voltages according to

IEC 60255-4):

37.0 Isolation (0.5 J, 1 min.) kV/DC 2

38.0 Pulse 1.2/50 µs kV 1

Telephone system:

39.0 Number of subscriber lines 1

40.0 Number of trunk lines 1

41.0 Equipped spare capacity after

commissioning

% 30

42.0 Capacity for additional lines % 50 (min.)


Page | 81


Table 27: Control and Monitoring System



Panels:

6.0 Pre-wired yes

7.0 Floor-mounted yes

8.0 Steel sheet thickness mm ≥ 2


10.0 Maximum height m 2.25

11.0 Door material glass

Bay units:

12.0 Spare units for additional bays Pcs.

1 spare for

each type of

Bay unit

provided

yes

13.0 Power supply from station battery V DC 110

Central Processing Units (PCU):

14.0 Microprocessor bus architecture bit 32/64

15.0 Memory for system software type PROM

16.0 Application software in battery-buffered

RAM or EPROM / Flash-PROM

yes

17.0 Automatic time synchronization at all

nodes of the network

yes

18.0 Fault indication LEDs on modules and

alarm messages on monitors

yes

19.0 Basic functions: logic, sequence control,

data processing, including code conversion,

text and alarm signal editing, and function

units for binary processes

yes

20.0 Cycle times, selectable (for each control

module)

ms 10, 20, 40, 50,

100, 200, 250,

500, 1000,

2000s

21.0 Programming language: Elements for

logic, control loops, arithmetic

yes

22.0 Minimum number of I/0 channels per

computer (analogue in / digital in / digital

out)

(see rel.

chapter)

23.0 Spare % 25

Video display and control system:

24.0 Power supply from station batteries V DC 110

25.0 Number of monitors for each control Pcs. 3


Page | 82




system

26.0 Number of function keyboards:

liquid-proof keyboard Pcs. 1

exchangeable extended keyboard Pcs. 1

27.0 Hardcopy printer Pcs. 1

28.0 Event and record printer Pcs. 2

29.0 Bus data channels Pcs. 1

30.0 Event list events min. 400

31.0 Alarm list alarms min. 100

32.0 Resolution:

within computer ms 1

between computers ms 5

33.0 External alarm outputs Pcs. 6

34.0 Diagramme change speed sec. 5

35.0 Diagramme updating:

event-driven sec. 1

cyclic, adjustable sec. 3 to 10

36.0 Transfer of manual command inputs sec. 1

Communication links:

37.0 Data transmission rate Mbit/sec. 10

38.0 Data transmission mode as serial bus to

IEEE 802.3 and CSMA / CD (Ethernet type)

yes

39.0 Conductor as duplex fibre optic cable yes

40.0 Data transmission rate Mbit/sec. 10

41.0 Number of buses per processing unit no. 2

42.0 Nodes per buses Pcs. max. 45

43.0 Transmission range (with fibre optic cable) m 1000

Programming and services unit (personal computer

or programming unit):

notebook or

personal com-

puter

44.0 Main processor type (or better) Pentium 166xx

45.0 Main memory Mbyte min. 512

46.0 Hard disc Gbyte min. 100

47.0 Floppy disc drive 3.5" Mbyte 1.44

48.0 Monitor type active LCD

49.0 Interfaces serial and par-

allel

50.0 Operating system OS, MS-DOS or

UNIX, Win-

dows, latest


Page | 83




version

51.0 Weight kg < 10

52.0 Ambient temperature:

Operation °C 15 - 50

Storage °C 0 - 60

Transport °C -30 - +60

Electromagnetic interference tests:

53.0 Insulation test, voltage test, individual test:

Applicable standards IEC 60255-5,

IEC 60950

Test voltage AC kV/Hz 2/50

or DC (1 minute) kV 2.85

external circuits against internal circuits

external circuits against earth and against earth

other

internal circuits against earth

54.0 Impulse voltage test, type test:

Applicable standards IEC 60255-5

Test level level III

Test voltage kV 5

External circuits against internal circuits µs pulse: 1.2/50

External circuits against earth

HF interference test, type test:

55.0 Applicable standard IEC 60255-22-1

56.0 Test level III

57.0 Test voltage (1 MHz attenuated, repeat

rate 400/sec.):

Common mode voltage kV 2.5

Differential voltage kV 1.0

Transient disturbance values / burst, type test

58.0 Applicable standard IEC 60801-2

59.0 Test voltage kV/ns 4, 5/50

60.0 Burst duration ms 15

61.0 Repetition time ms 300

Electromagnetic fields, type test

62.0 Applicable standards IEC 60801-3

IEC 60255-22-3

Electromagnetic discharges, type test

63.0 Applicable standard IEC 60801-2

64.0 Test conditions front door


Page | 84




closed, closed

panel (covered)

65.0 Sharpness 3

66.0 Test voltage kV 8

Electric meter

67.0 Basic current lb A 3 x 5

68.0 Load capacity in % of lb:

Metering 400

Thermal 500

Short circuit peak value of

50 lmax and >25

lmax during 1 µs

69.0 Rated voltage (Un) V 3 x 230 / 400

70.0 Rated frequency Hz 50

71.0 Accuracy class 0.2

72.0 No creep on voltage variation V 0.8 ÷ 1.15 Un

73.0 Starting load max. A 0.05% lb


Page | 85


Table 28: Under Ground Cable




Location of manufacturing site to be specified

Manufacture quality certification ISO 9001

Circuit rating required MVA 90

1.0 General description of cable

Number of cores 1

System voltage kV 132

Conductor size mm2

Insulation type XLPE

Metal sheath type Lead

Oversheath type HDPE

2.0 Insulation Cordination

Highest system Voltage (Um) (Insulation class) kV 145

Nominal Voltage between conductors kV 132


Nominal Voltage between conductor and sheath (Uo) kV 76.2

Rated Withstand impulse Voltage( altitude < 1000 M) kV 650

Rated short duration power frequency withstand voltage

(altitude < 1000 M)

kV 275

3.0 Rating 1

maximum continuous direct- buried current rating

assuming

Ground temperature of 30o C, Max. Soil Thermal

resistivity of 2.7Km/W, Flat formation configuration and

special bonding of metal sheath

Guaranteed current rating Single Trench

Calculation Method

A

To be specified

IEC

60840,60287

Maximum continuous in air current , assuming

Air Temperature (in shade) of 40oC, Flat formation

configuration spacing of 250mm, Thermally independent

of other circuits and special bonding of metal sheath

Calculation Method

A

To be specified

IEC 60840,

60287

maximum permissible core temperature for continuous

operation

oC 90

Sort circuit capacity for 1 sec kA To be specified


Page | 86




Permissible Max. sheath Temperature

Permissible Max. Conductor Temperature

oC

oC

Permissible emergency Overload

Applied on 100% continuous load

Emergency current rating

Max. Emergency temperature

Allowable duration/ operation

Allowable total duration/ operation

Max. average duration/average on total life of cable

A oC

Hours

Hours

Hours

to be specified







A oC

Hours

Hours

Hours

to be specified







A oC

Hours

Hours

Hours

to be specified

4.0 Construction features

Conductor

Material

Nominal cross section

Shape and type of conductor

Overall diameter

Water blocking method

Semi conductor blinder tape

mm2

mm

Aluminum

tape/yarn

yes

Conductor Screen

Material

Nominal Thickness

Minimum Thickness

Nominal overall diameter

Compound identification reference

mm

mm

mm

Fully bonded

Semicon. XLPE

yes

Insulation

Material

Nominal Thickness

mm

XLPE


Page | 87




Minimum Thickness


Max. Continuos operating temperature


Maximum stress at nominal voltage

At conductor screen

At insulator screen

Maximum stress at impulse voltage

At conductor screen

At insulator screen

mm

mm oC

kV/mm

kV/mm

kV/mm

kV/mm

90

yes

Insulation screen

Material

Nominal Thickness



Indelible ink marking on screen

mm

mm

Fully bonded

Semicon. XLPE

yes

XLPE manufacturing methods

Extrusion line type e,g CCv,MDCV,VCV

Single pass/triple exclusion

Curing method

Cooling method

Degassing period

days

VCV

yes

dry

dry

Bedding for moisture absorption

Type of Material

Nominal Thickness

Mimimum thickness


mm

mm

mm

Metallic screen

Type and Material

Nominal Thickness

Mimimum thickness

Nominal diameter over screen

Cross sectional area of he screen

Short time current density(1sec)

mm

mm

mm

mm2

kA/mm2

Copper wire

Bedding/Binder tape

Type and Material

Nominal Thickness


Page | 88




Mimimum thickness

Nominal overall diameter over bedding

mm

mm

mm

Metallic screen

Type and Material

Nominal Thickness

Mimimum thickness

Nominal diameter over screen

Cross sectional area of he screen

Short time current density(1sec)

mm

mm

mm

mm2

kA/mm2

lead-alloy ½ C

Protective anti corrosion external sheath covering

Bitumen undercoat

Type and material

Colour

Nominal thickness

Minimum thickness

Termite resistant

Type of anti termite protection

Thermal resistivity

Type of fire protection for closing section

mm

mm

Km/w

HDPE

Black

Yes

Specify max. 6.0

Type of conductive outer layer Graphite/or

semicon.

polymer

Weight of completed cable

Copper

Insulation

Lead alloy

Gross weight

Kg/m

Kg/m

Kg/m

Kg/m

to be specified

5.0 losses

Maximum dielectric loss per meter/ phase when operating

at nominal voltage frequency and at maximum conductor

temperature

W/m to be specified

Maximum sheath loss per meter/ phase when operating

at nominal voltage frequency and at current stipulated in

item 3 with sheath bonded and earthed as recommended

(sectionalising Cross bonding)

W/m to be specified

Maximum conductor loss per meter/ phase when

operating at nominal voltage frequency and at current

stipulated in item 3

W/m to be specified


Page | 89




Total loss of cable per metre/ phase of three phase circuit W/m to be specified

35.0 Electrical values

Maximum dc resistance of conductor at 20o C µΩ/m to be specified

Maximum ac resistance of conductor at operating

temperature C

µΩ/m to be specified

Equivalent reactance of three phase circuit µΩ/m to be specified

Electrostatic capacitance per conductor of cable at

nominal voltage and operating temperature

pF/m to be specified

Max. charging current per conductor at nominal voltage mA/m to be specified

Charging capacity of three phase system (at Uo) Var/m to be specified

Max. dielectric loss factor of cable at nominal voltage and

frequency at a conductor temperature of;

20 oC

90 o

C

to be specified

Positive and negative impedance Ω/m to be specified

Zero sequence impedance (as installed conditions)

Resistance

Reactance

Capacitance

Ω/m

Ω/m

pF/m

to be specified

Surge impedance Ω/m to be specified

36.0 Bonding and earthing

Type of special bonding

Max. sheath potential of completed cable with conductor

at max. earth fault current of 31.5 kA with sheath bonded

and earthed as recommended

V/m to be specified

Max. sheath potential of completed cable with conductor

at rated current with sheath bonded and earthed as

recommended

V/m to be specified

8.0 Testing

Routine tests

As per IEC 60840

Additional tests specified in Ketraco spec.

yes

Sample tests

5Uo for 1 hr ( as per Ketraco spec)

IEC 60840

Type tests

Test regime

Location of test

date of test

yes

Commissioning tests

AC voltage withstand

1.7Uo for 1 hour

< 10pC


Page | 90




Partial discharge monitoring

Oversheath DC voltage test

kV 12kV for 15

minutes


Page | 91


Table 29: 132 kV Isolators without Earthing Switches









Power frequency withstand voltage (at altitude less than 1000 M) kV rms 275

Rated short-time current kA 31.5


Number of poles 3



Operation motorized





Between poles mm 1600

To earth mm 1300

For isolating distance mm to be specified


For disconnector motor





Automatic isolation of control supplies when lock off yes

Rated power of operating coil W to be specified

Rated Motor power W to be specified




Tin plated for Isolator Yes

For the disconnector 5 NO , 5 NC


Wind load Pa

(N/mm²)

to be specified



Page | 92




Straight load N 500

Cross load N 170


With earthing switch kg to be specified

Without earthing switch kg to be specified






Page | 93


Table 30: 33 kV Isolators without Earthing Switches









Power frequency withstand voltage (at altitude less than 1000 M) kV rms

70

Rated short-time current kA 25


Number of poles 3

Rated current A 800



yes

Automatic isolation of control supplies when lockoff yes

yes


Rated Motor power W


Operation motorized



Page | 94







6.0 Between poles mm 500

7.0 To earth mm 435

8.0 For isolating distance mm to be specified


9.0 For disconnector Motorised






10.0 For the disconnector 5 NO , 5 NC


Wind load Pa

(N/mm²)

to be specified


11.0 Straight load N 500

12.0 Cross load N 170


13.0 With earthing switch kg to be specified

14.0 Without earthing switch kg to be specified


Page | 95








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