DEFINITIONS AND ABBREVIATIONS - Kenya · Web viewDCshall mean direct current INshall mean...

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

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

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


DEFINITIONS AND ABBREVIATIONSThe following terms may be met in these Technical Schedules and shall be interpreted as follows:

Hz shall mean hertzkW shall mean kilowattMW shall mean megawattVA (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 metreAC shall mean alternating currentDC shall mean direct currentIN shall mean rated (nominal) currentUN shall mean rated (nominal) voltageAh shall mean ampere-hourslm shall mean lumenlm/w shall mean lumen per wattmin shall mean minutemin. shall mean minimum(prefix) shall mean microrms shall mean root mean squarep.u. shall mean per unitp/p shall mean peak to peakT shall mean Teslakg shall mean kilogramN shall mean Newtonl shall mean litres or sec. shall mean secondNo. shall mean numberdB shall mean decibelAmp shall mean amperesF shall mean FaradoC shall mean centigradeK shall mean degree Kelvinm2 shall mean square metre (mm2 for millimetre, etc)m3 shall mean cubic metre (mm3 for millimetre, etc)m3/s shall mean cubic metres per secondm shall mean metrecm shall mean centimetremm shall mean millimetrejoules shall mean joules per hourtonne shall mean metric tonne

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% shall mean percentagePascal 1 N/m2cst shall mean centistoke

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Table 1: 132/33 kV 23 MVA Power Transformers and On-Load Tap ChangerMinimum 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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Minimum Requirements Data offered by Bidder


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:



TV bushing kV to be specified

HV, LV neutral bushings kV to be specified

Impulse withstand voltage:



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On-Load Tap ChangerManufacturer 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


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


across fine tap winding kV peak to be specified


between phases of fine tap winding kV peak 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 BidderDescription Unit Data

Manufacturer 2 to be specified



Installation outdoorRated maximum voltage (Primary / Secondary) kV 145 / 36Rated service voltage

Primary side (high voltage) kV 132Secondary side (low voltage) kV 33






Rated power ONAN[Performance Guarantee]

MVA 10

Rated frequency Hz 50Rated current



Vector group Dyn11Impedance voltage of:

ONAN centre tap % 9.8Insulation uniformType of cooling ONANTapping range ± 1.67%

in ± 8 steps

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No-load losses at rated frequency and 100% volt-age - maximum value [Performance Guarantee]

kW to be specified




Material of winding copperTemperature rise at rated power over 40°C maxi-mum ambient [Performance Guarantee]

oil (upper level) °C 55winding °C 60

Rated power frequency withstand voltage HV/LV kV 275/70Rated lightning impulse withstand voltage:

HV windings kV peak 650LV windings kV peak 170



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 no-load current % In 0.2Painting Admiralty

Grey shade No. 632 as

per BS 381CDimensions




distance between wheels' centres mm to be

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specifiedTotal weight kg to be

specifiedOil weight kg to be

specifiedApplicable standard(s) IEC 60076

IEC 60354


Maximum current carrying capacity of bushings:HV A 120% of INLV A 120% of IN

Rated service voltage of bushings:HV kV 132LV kV 33HV, neutral kV to be

specifiedLV, neutral kV to be

specified

1 minute, 50 Hz dry withstand voltage:HV bushing kV to be

specifiedLV bushing kV to be

specifiedTV bushing kV to be

specifiedHV, LV neutral bushings kV to be

specified

1 minute, 50 Hz wet withstand voltage:HV bushing kV to be




specified

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Impulse withstand voltage:HV bushing kV to be


specified


specifiedType to be

specifiedRated current A 175Rated short-time current

1 second (maximum) kA 31.53 seconds kA to be

specifiedStep voltage V to be

specifiedNumber of steps 17On-load tap changer ±8 x 1.67%Minimum number of operations operations 200,000Motor drive


Supply voltage V 400/230Insulation level voltage to earth kV rms to be

specifiedInsulation level


Impulse test voltage kV peak to be specified



Internal insulation levels / one-minute power fre-quency test voltage:


kV rms to be

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specifiedacross fine tap winding kV peak to be

specifiedkV rms to be

specifiedbetween phases of fine tap winding kV peak to be

specifiedkV rms to be

specified

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





Installation outdoorRated maximum voltage (Primary / Secondary) kV 145 / 36Rated service voltage

Primary side (high voltage) kV 132Secondary side (low voltage) kV 33






Rated power ONAN[Performance Guarantee]

MVA 15

Rated frequency Hz 50Rated current



Vector group Dyn11Impedance voltage of:

ONAN centre tap % 9.8

Insulation uniformType of cooling ONANTapping range ± 1.67%

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in ± 8 stepsNo-load losses at rated frequency and 100% volt-age - maximum value [Performance Guarantee]

kW to be specified




Material of winding copperTemperature rise at rated power over 40°C maxi-mum ambient [Performance Guarantee]

oil (upper level) °C 55winding °C 60

Rated power frequency withstand voltage HV/LV kV 275/70Rated lightning impulse withstand voltage:

HV windings kV peak 650LV windings kV peak 170



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 no-load current % In 0.2Painting Admiralty

Grey shade No. 632 as

per BS 381CDimensions




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distance between wheels' centres mm to be specified



Applicable standard(s) IEC 60076 IEC 60354


Maximum current carrying capacity of bushings:HV A 120% of INLV A 120% of IN

Rated service voltage of bushings:HV kV 132LV kV 33HV, neutral kV to be

specifiedLV, neutral kV to be

specified

1 minute, 50 Hz dry withstand voltage:HV bushing kV to be




specified

1 minute, 50 Hz wet withstand voltage:HV bushing kV to be




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specified

Impulse withstand voltage:HV bushing kV to be


specified


specifiedType to be

specifiedRated current A 33Rated short-time current

1 second (maximum) kA 31.53 seconds kA to be

specifiedStep voltage V to be

specifiedNumber of steps 17On-load tap changer ±8 x 1.67%Minimum number of operations operations 200,000Motor drive


Supply voltage V 400/230Insulation level voltage to earth kV rms to be

specifiedInsulation level


Impulse test voltage kV peak to be specified



Internal insulation levels / one-minute power fre-quency test voltage:


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across fine tap winding kV peak to be specified


between phases of fine tap winding kV peak to be specified


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Table 5: 132 kV Circuit Breaker




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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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


Manufacturer to be specifiedType to be specifiedInstallation outdoorRated maximum voltage kV 145Rated service voltage kV 132Rated lightning impulse (BIL)(at altitude less than 1000 M) kV peak 650Power frequency withstand voltage (at altitude less than 1000 M) kV rms 275Rated short-time current kA 31.5Rated frequency Hz 50Number of poles 3Rated current A 1600Minimum creepage distance mm/kV 31Operation motorizedOpening time sec. ≤ 30Closing time sec. ≤ 30Rated peak withstand current kA 100Minimum 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 110Current required at rated supply voltage to operate isolator: A to be specifiedHand operating facility yesLocking arrangement in Off and On yesAutomatic isolation of control supplies when lock off yesRated power of operating coil WRated Motor power WFacing of terminals and contacts to be specifiedShape of terminals of the main circuit to be specifiedNumber 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 > 10Wind load Pa

(N/mm²)to be specified

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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 specifiedApproximate dimensions in close position mm to be specifiedWith all accessories for installation to be specifiedApplicable Standard(s) IEC 62271-102

Table 8: 33kV Outdoor Circuit Breaker

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Type of circuit breaker outdoor type

Type of arc quenching medium Vacuum




Rated lightning impulse (BIL)


kV peak 170

Power frequency withstand voltage


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

Number of tripping coils 2

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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

10.0Motor power rating KW to be specified

11.0Closing and opening coil voltage V DC 110

12.0Number of closing coils 1

13.0Number of opening coils 2

14.0Spring charge time s to be specified

15.0Manual release spring yes

16.0Hand operating facility yes

17.0Emergency trip facility yes

18.0Mechanical Off and On indicators yes

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

Main dimensions:

20.0Depth mm to be specified

21.0Height mm to be specified


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Accessories in the motor mech. enclosure

22.0Operation counter yes

23.0Local manual control yes

24.0Test switches (dc) yes

25.0Heater yes

Weatherproof, corrosion resistance enclosure IP65

Accessories in the central control panel

26.0Anti-pumping relay yes

27.0Local/distance command selector switch yes

28.0Local operation push buttons yes

29.0Minimum pressure lock-out and alarm relay

yes

30.0Lighting, heating and service plug yes

31.0Terminal blocks yes

32.0Test switches (DC) yes

33.0Phase discrepancy timer relay yes

34.0Mounting 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








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

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

Hand operating facility yes

Locking arrangement in Off and On yes

Automatic isolation of control supplies when lockoff yes

Rated power of operating coil W

Rated Motor power W


Operation motorized

Opening time sec. ≤ 30

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Closing time sec. ≤ 30

Rated peak withstand current kA 100

Minimum clearance in air:

6.0 Between poles mm 500

7.0 To earth mm 435

8.0 For isolating distance mm to be specified

Type of operating mechanism:

9.0 For disconnector Motorised

10.0For 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

Facing of terminals and contacts to be specified

Shape of terminals of the main circuit to be specified

Number and type of auxiliary switches:

11.0For the disconnector 5 NO , 5 NC

12.0For the earth switch to be specified

Auxiliary contact rating A > 10

Wind load Pa (N/mm²)

to be specified

Mechanical terminals load:

13.0Straight load N 500

14.0Cross load N 170

Weight of complete disconnector:

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15.0With earthing switch kg to be specified

16.0Without 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 10: 132 kV Voltage Transformer


Manufacturer's name to be indicatedType to be specifiedModel to be specifiedInstallation outdoorExecutionRated maximum voltage kV 145Rated primary voltage kV 132/√3Rated secondary voltage (second winding) kV 0.1/√3Rated secondary voltage (third winding) kV 0.1/√3Rated frequency Hz 50Impulse withstand voltage 1.2/50 micro s wave(at altitude less than 1000 M)

kV peak 650

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

kV rms 275

Power frequency withstand voltage secondary winding

kV rms 2

Rated output (second winding/ third winding): VA 100/100Accuracy class6.0 For metering 0.2

7.0 For measuring 0.58.0 For protection 3P

Voltage factor at rated voltage:9.0 Continuous 1.210.030 second 1.5

Thermal limit burden VA to be specifiedNormal temperature rise: 28

11.0Winding °C 5012.0Oil °C 45

Maximum temperature rise under short circuit con-ditions:

13.0Winding °C to be specified14.0Oil °C to be specified

Total height mm to be specifiedMinimum creepage distance: mm/kv 31Size and section of terminals bolts mm to be specifiedWeight of oil per pole kg to be specifiedWeight total per pole kg to be specifiedType of oil and reference specification to be specified

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Permissible secondary short circuit current A to be specifiedApplicable standard(s) IEC 60044-2

60044-5

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Table 11: 132kV Current Transformer



Manufacturer's name to be indicated






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

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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:

12.0Thermal (Ith) kA 31.5

13.0Dynamic (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:

14.0Dynamic load N to be specified

15.0Static 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

Weight of oil per pole kg to be specified

Type of oil and reference specification to be specified

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Dimensions mm to be specified



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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

altitude less than 1000 M)

kV 275

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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

10.0Protection class IP 54

11.0Number per 3 arresters 1

Applicable Standard(s) IEC 60099-1, 1A, 2, 4

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Table 13: 33kV Voltage Transformer


Manufacturer's name to be indicatedType to be specifiedModel to be specifiedInstallation outdoorExecutionRated maximum voltage kV 36Rated primary voltage kV 33/√3Rated secondary voltage (second winding) kV 0.1/√3Rated secondary voltage (third winding) kV 0.1/√3Rated frequency Hz 50Impulse withstand voltage 1.2/50 micro s wave(at altitude less than 1000 M)

kV peak 170

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

kV rms 70

Power frequency withstand voltage secondary winding

kV rms 2

Rated output (second winding/ third winding): VA 100/100Accuracy class6.0 For metering 0.2

7.0 For measuring 0.58.0 For protection 3P

Voltage factor at rated voltage:9.0 Continuous 1.210.030 second 1.5

Thermal limit burden VA to be specifiedNormal temperature rise: 28

11.0Winding °C 5012.0Oil °C 45

Maximum temperature rise under short circuit con-ditions:

13.0Winding °C to be specified14.0Oil °C to be specified

Total height mm to be specifiedMinimum creepage distance: mm/kv 31Size and section of terminals bolts mm to be specifiedWeight of oil per pole kg to be specifiedWeight total per pole kg to be specifiedType of oil and reference specification to be specifiedPermissible secondary short circuit current A to be specified

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Applicable standard(s) IEC 60044-2, 60044-5

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Table 14:33kV Surge Arresters






Nominal system voltage kV 33

Rated operating voltage (Ur) kV 30

Rated continuous operating voltage (Uc) kV 21


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 kV 70

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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

kV crest 170

Maximum short circuit rating kA 25

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


8.0 Type outdoor

9.0 Counter indication digital

10.0Protection class IP 54

11.0Number per 3 arresters 1


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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

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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

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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

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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

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Accuracy class 0.2

Rated burden for protection cores VA 30

Accuracy class 5 P 20

Short-time current ratings:

11.0Thermal (Ith) kA 25

12.0Dynamic (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:

13.0Dynamic load N to be specified

14.0Static load N to be specified


Size and section of terminal bolts to be specified

Weight per pole kg to be specified

Weight of oil per pole kg to be specified

Type of oil and reference specification to be specified

Dimensions mm to be specified



Page | 48



Table 18: 33kV Surge Arresters


Manufacturer's name to be indicatedType to be specifiedInstallation outdoorNominal system voltage kV 33Rated operating voltage (Ur) kV 30Rated continuous operating voltage (Uc) kV 21Rated frequency Hz 50Nominal discharge current kA 10Residual 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 specifiedSwitching current 30/60 impulse of 500 A/1000 A kV to be specifiedHigh current 4/10 impulse withstand value kA 100Low current, long duration current impulse with-stand (upper value)

A 1000

Line discharge class 3Absorption capability in kJ/kV of arrester rating at thermal stability

kJ/kV 8

Pressure relief class class ASuitability for fault current kA 40Power frequency 1 min. withstand voltage, wet kV 70Maximum RIV at 1000 kHz measured at 1.05 time the system highest voltage

micro V 500

Impulse withstand voltage of arrester insulation external assembly

kV crest 170

Maximum short circuit rating kA 25Overall height of arrester mm to be specifiedCreepage distance mm/kV 31Weight of arrester kg to be specifiedArrester classification heavy duty,

station-type gapless metal

oxide or equivalent


8.0 Type outdoor9.0 Counter indication digital

Page | 49




10.0Protection class IP 5411.0Number per 3 arresters 1


Page | 50



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


Manufacturer's name to be indicatedMaterial porcelain, glass

disc, composite polymer

Rated maximum voltage (String) kV 145Service voltage (String) kV 132Individual Disc DataDisc diameter (minimum) mm 254Spacing mm 146Flashover values:Power frequency voltage kV rms 132Power frequency

6.0 Dry kV 957.0 Wet kV 55

Lightning impulse:8.0 Positive kV 1259.0 Negative kV 130

Radio interference voltage (RIV):10.0Test voltage to ground kV 1011.0Max. RIV at 1000 kHz micro V 50

Nominal creepage distance mm 432Dry arcing distance mm 203.2Weight: kg to be indicatedAccessories: to be indicated

12.0Clevis13.0Tongue fittings

ANSI class 52.6Applicable Standard(s) IEC 60016,

IEC 60305, IEC 60433, IEC 60076, IEC 60289

Page | 51



Table 20: 132kV Post-Type Insulators


Manufacturer's name to be indicatedMaterial porcelain or

polymer , composite polymer

Installation outdoorRated maximum voltage kV 145Rated service voltage kV 132Lightning 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 500Nominal creepage distance mm/kV 31Mechanical values:6.0 Cantilever kg 800

7.0 Tensional strength kgm 400Weight: kg to be specifiedAccessories: to be specified

8.0 Connectors9.0 Joints10.0Clamps

Applicable Standard(s) IEC 60016, IEC 60168, IEC 60865, IEC 60273DIN 48 013

Page | 52



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

7.0Secondary side (low voltage) kV 0.4

Rated power kVA 100


Rated current:

8.0Primary side (high voltage) A 2

9.0Secondary side (low voltage) A 5

Vector group Dyn11

Impedance voltage % 4

Type of cooling ONAN

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 | 53





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



Applicable standard(s) IEC 60076

Page | 54



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 | 55





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


Applicable standard(s) IEC 60364

IEC 60439

VDE 0100

Page | 56



Table 23: Battery Bank 110 V DC, 300 Ah


Manufacturer to be specifiedType sealed OPzV, lead-

acid, tubular plate, electrolyte in gel

formModel to be specifiedInstallation indoor, vertically on

racksElectrolyte sulphuric acid, fixed

as gelContainer lid styrene acrylonitrile

(SAN) plasticPositive electrodes tubular plate, lead

calcium alloyConnector technique bolted connectors,

completely insulatedNumber of cells to be specifiedNominal voltage V DC 110Nominal capacity at 10 hour discharge rate Ah 300Float voltage per cell V to be specifiedFloat charging current A to be specifiedBoost charging voltage per cell V to be specifiedBoost charging current A to be specifiedBattery voltage at end of duty cycle V to be specifiedShort circuit current A to be specifiedInternal resistance to be specifiedLife expectancy years ≥ 20Cycling capacity cycles > 1,200Weights and dimensions:

6.0total weight of battery (incl. electrolyte) kg to be specified7.0weight per cell (incl. electrolyte) kg to be specified8.0width x depth x height per cell mm to be specified

Applicable standard(s) IEC 60896IEC 61056

Page | 57



Table 24: Battery ChargerMinimum Requirements Data offered by

BidderDescription Unit DataManufacturer to be specifiedType 2 full capacity redun-

dantModel to be specifiedDesign fully electronic stan-

dard designCharacteristics 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 sideProtection class IP41AC supply:

29.0 Rated service voltage V 400/23030.0 Frequency Hz 5031.0 Rated current A to be specified

DC output:32.0 Rated service voltage V 11033.0 Voltage setting range % ±534.0 Float charging voltage V 125 (at 2.23 V/cell)35.0 Boost charging voltage V 2.4 per cell36.0 Regulation error of output voltage:-at load variation 0-100% % ± 1-at frequency variations 50 Hz % ± 5-at input voltage variation % ± 1037.0 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 IEC41.0 Radio interference "A" according to EN

Page | 58




5501142.0 Derating factor (thyristors) 2.3 as per VDE

016043.0 Cooling natural circulation44.0 Fuse switch disconnector (charger output) to be specified45.0 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 specified51.0 Fuse supervision of auxiliary and control

circuitsto be specified

52.0 Ripple monitoring to be specified53.0 Time to recharge battery to 80% capacity

from fully discharged statehour 10

Measuring:54.0 Volt meter and ammeter (charger output) to be specified55.0 Battery tension, consumer tension to be specified56.0 Charger current, consumer current to be specified

Disturbance reports:57.0 Main failure, rectifier tensions too low to be specified58.0 Battery circle too low, rectifier tension too

high, battery deeply unloadedto be specified

59.0 Battery circle disturbed, ground fault plus/minus

to be specified

60.0 Capacity test negative, short circuit to be specifiedEfficiency % 80Weight kg to be specifiedWidth x depth x height mm to be specifiedApplicable standard(s) IEC 60146

IEC 60364IEC 60439

Page | 59




IEC 60947

Page | 60



Table 25: Protection Relays

Minimum Requirements Data offered by BidderDescription- Protection and indication system Unit Data

LINE DIFFERENTIAL PROTECTION AND BACK UP DISTANCE (87l/21)Manufacturer to be specifiedType referenceRelay design (microprocessor based, numerical) NumericalAuxialliary Voltage range (Vn= 110 V dc Vdc 77-150Input frequency range (50Hz Nominal) Hz 47.5-52.5Differential protection requirementsPhase segregated protection Yes

Ratio and Vector correction for CTs YesAdjustable biased differential protection characteristics

yes

Sensitivity- For phase faults- For earth faults- Operating time

ms <30

Distance protection requirements3 zone ph-ph&ph-E yesPhase fault & Earth fault characteristic shapes (Mho, Quad)

yes

Operating time ms <30SOTF YesPower swing Blocking ( depending on relaying point in the power system

yes

Voltage transformer supervison yestime delay for all zones yesZone enable/disable for all zones yesOther requirementsThermal overload, 49 noCircuit breaker failure 50BF (dependent on

application)yes

Event recording function yes

Disturbance recording function yesFault locator function yes

Intergral operator interface for local interrogation yes

Programmable scheme logic yesUser friendly HMI, Window based software for yes

Page | 61




relay setting, relay configuration and event,disturbance and fault record management .carry continuous current 1A yesMake 6A max. for 0.2s yesBreak dc 50W resistive25W inductive (L/R 40ms)

yes

Self checking facility yes

Intergralintertrip send and receive, with external input interface

yes

CommunicationsProtectionDirect optical fibre 1300nm single mode

yes

ControlCommunication 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 testsAtmosphericOperation -25C and 55C for 96hrs, IEC 60068-2-1Transport/storage – 25 and 70C for 96 hrs, IEC

60068-2-

yes

Relative HumidityOperation at 93%Tested to IEC 60068-2-3 with severity class 56 days

yes

EnclosureIEC 60529 IP50

yes

Mechanical EnvironmentVibration IEC 60255-21-1Shock and bump IEC 60255-21-2Seismic IEC 60255-21-3

Yes Yes yes

InsulationRated Insulation1000V high impedance protection CT inputs250V for other circuits1000V open contact withstand Dielectric testsIEC 60255-5-Series C of table 1Impulse voltage

Yes

Yes

yes

Page | 62




IEC 60255-5 test voltage 5kvElectromagnetic compatibility1Mhz Burst disturbance test,IEC 60255-22-1 severity class IIElectrostatic dischargeIEC 60255-22-2 severity class IIIRadiated Electromagnetic field DisturbanceIEC 60255-22-3 severity class IIITest method A, 27Mhz through 500MhzElectromagnetic EmissionsIEC 60255-25Fast transient disturbanceIEC 60255-22-4 severity level IvType test certificates to be provided

Yes

Yes

Yes

Yes

Yes


DISTANCE PROTECTION (21)Manufacturer to be specifiedType referenceRelay design (microprocessor based, numerical) NumericalAuxialliary Voltage range (Vn= 110 V dc Vdc 77-150Input frequency range (50Hz Nominal) Hz 47.5-52.5Distance protection requirements3 zone ph-ph&ph-E yesPhase fault & Earth fault characteristic shapes (Mho, Quad)

yes

Operating time ms <30SOTF YesPower swing Blocking ( depending on relaying point in the power system

yes

Voltage transformer supervision yesTime delay for all zones yesTeleprotection modes PUR/POR/Block yesDEF plain and Blocking modes yesZ1 min and max operating time (mid Zone)Zone enable/disable for all zones yesOther requirementsThermal overload, 49 noCircuit breaker failure 50BF- (dependent on

application)yes

Event recording function yes

Page | 63




Disturbance recording function yesFault locator function yes

Integral operator interface for local interrogation yes

Programmable scheme logic yesUser friendly HMI, Window based software for relay setting, relay configuration and event,disturbance and fault record management .

yes

carry continuous current 1A yesMake 6A max. for 0.2s yesBreak dc 50W resistive25W inductive (L/R 40ms)

yes


Integral inter-trip send and receive, with external input interface

yes


yes

ControlCommunication ports ( Front/rear etc)(Note: Two Rear ports for NCC and RCC)Physical links (R485/Fibre optic)Protocol supported- IEC 60870-5-101- IEC 61850

yes


60068-2-

yes


yes


yes


Yes Yes yes

InsulationRated Insulation Yes

Page | 64




1000V high impedance protection CT inputs250V for other circuits1000V open contact withstand Dielectric testsIEC 60255-5-Series C of table 1Impulse voltageIEC 60255-5 test voltage 5kv

Yes

yes

Electromagnetic compatibility1Mhz Burst disturbance test,IEC 60255-22-1 severity class IIElectrostatic dischargeIEC 60255-22-2 severity class IIIRadiated Electromagnetic field DisturbanceIEC 60255-22-3 severity class IIITest method A, 27Mhz through 500MhzElectromagnetic EmissionsIEC 60255-25Fast transient disturbanceIEC 60255-22-4 severity level IvType test certificates to be provided

Yes

Yes

Yes

Yes

Yes


LOW IMPEDANCE BUSBAR PROTECTION INCLUDING BREAK FAILURE PROTECTIONManufacturer to be specifiedType referenceRelay design (microprocessor based, numerical) NumericalAuxiliary Voltage range (Vn= 110 V dc Vdc 77-150Input frequency range (50Hz Nominal) Hz 47.5-52.5State principle of operation i.e. low impedanceIntegral check zone feature (state principle of operation)

Yes

Distributed bay modules and central Unit (Y/N) YesMaximum number of bays yes- Isolator replica ms <30CT saturation detector and stabilisationIntegral CT Supervision yesCT matching Functions yesPhase segregated protection ms <30Two stage breaker failure

Phase faults Earth fault

Yes

Page | 65




Facility to initiate the scheme by auxialiary contacts I,eBucholz operation2 out 4 check of current detectors Independently settable delay times for operation with and without currentInput trip contact

Yes

Yes

YesOther requirementsUser friendly HMI, Window based software for relay setting, relay configuration and event,disturbance and fault record management .

yes


yes



yes


yes

ControlCommunication ports ( Front/rear etc)(Note: Two Rear ports for NCC and RCC)Physical links (R485/Fibre optic)Protocol supported- IEC 60870-5-101- IEC 61850

yes


60068-2-

yes


yes


yes

Mechanical EnvironmentVibration IEC 60255-21-1 Yes

Page | 66




Shock and bump IEC 60255-21-2Seismic IEC 60255-21-3

Yes yes

InsulationRated Insulation1000V high impedance protection CT inputs250V for other circuits1000V open contact withstand Dielectric testsIEC 60255-5-Series C of table 1Impulse voltageIEC 60255-5 test voltage 5kv

Yes

Yes

yes


Yes

Yes

Yes

Yes

Yes


Multifunction Overcurrent & Earth fault protection (50/51/50N/51NManufacturer to be specifiedType referenceRelay design (microprocessor based, numerical) NumericalAuxialliary Voltage range (Vn= 110 V dc Vdc 77-150Input frequency range (50Hz Nominal) Hz 47.5-52.5Number of phase CT inputsNumber of earth fault CT inputsStandard, Very and Extreme inverse and definite time characteristics curves conforming to IEC60255

Yes

Number of inverse overcurrent functions per phaseNumber of high set overcurrent functions per phaseNumber of low set overcurrent functions per phaseNumber of inverse earth fault functions

Page | 67




Number of high set earth fault functionsNumber of low set earth fault functionsNumber of group settingEarth 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 yesOpto-isolator inputs yesEvent recording function yes

Disturbance recording function yesIntergral operator interface for local interrogation yes


yes


yes



yes


yes

ControlCommunication ports ( Front/rear etc)(Note: Two Rear ports for NCC and RCC)Physical links (RS485/Fibre optic)Protocol supported- IEC 60870-5-101- IEC 61850

yes

Page | 68





60068-2-

yes


yes


yes


Yes Yes yes


Yes

Yes

yes


Yes

Yes

Yes

Yes

Yes


Multifunction Directional Overcurrent & Earth fault protection (50/51/50N/51NManufacturer to be specified

Page | 69




Type referenceRelay design (microprocessor based, numerical) NumericalAuxialliary Voltage range (Vn= 110 V dc Vdc 77-150Input frequency range (50Hz Nominal) Hz 47.5-52.5Number of phase CT inputsNumber of earth fault CT inputsThree phase VT inputMethod 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 phaseNumber of high set DOC functions per phaseNumber of low set DOC functions per phaseNumber of inverse DEF functionsNumber of high set DEF functionsNumber of low set DEF functionsNumber of group settingOther 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 requirementsIntegral metering functions yesOpto-isolator inputs yesEvent recording function yes

Disturbance recording function yesIntergral operator interface for local interrogation yes


yes

Page | 70





yes



yes


yes


yes


60068-2-

yes


yes


yes


Yes Yes yes


Yes

Yes

yes

Electromagnetic compatibility

Page | 71




1Mhz Burst disturbance test,IEC 60255-22-1 severity class IIElectrostatic dischargeIEC 60255-22-2 severity class IIIRadiated Electromagnetic field DisturbanceIEC 60255-22-3 severity class IIITest method A, 27Mhz through 500MhzElectromagnetic EmissionsIEC 60255-25Fast transient disturbanceIEC 60255-22-4 severity level IvType test certificates to be provided

Yes

Yes

Yes

Yes

Yes


TRANSFORMER DIFFERENTIAL PROTECTIONManufacturer to be specifiedType referenceRelay design (microprocessor based, numerical) NumericalAuxiliary Voltage range (Vn= 110 V dc Vdc 77-150Input frequency range (50Hz Nominal) Hz 47.5-52.5Differential protection requirementsPhase segregated protection Yes

Ratio and Vector correction for CTs YesAdjustable biased differential protection characteristics

yes

Sensitivity- For phase faults- For earth faults- Operating time

ms <30

5th Harmonic restraint yesOther requirementsHigh set element yesMagnetising current inrush restraint yesMeasurement and indication on MMI of phase HV and LV differential and bias current

yes

Separate function that performs overfluxing protection with trip and alarm functions

Yes

Overcurent and earth fault yesEvent recording function yes

Disturbance recording function yes

Page | 72




Latching output contact yes



yes


yes



yes


yes


yes


60068-2-

yes


yes


yes


Yes Yes yes

InsulationRated Insulation1000V high impedance protection CT inputs

Yes

Page | 73




250V for other circuits1000V open contact withstand Dielectric testsIEC 60255-5-Series C of table 1Impulse voltageIEC 60255-5 test voltage 5kv

Yes

yes


Yes

Yes

Yes

Yes

Yes


TRANSFORMER RESTRICTED EARTH FAULT PROTECTIONManufacturer to be specifiedType referenceRelay design (microprocessor based, numerical) NumericalAuxiliary Voltage range (Vn= 110 V dc Vdc 77-150Input frequency range (50Hz Nominal) Hz 47.5-52.5Differential protection requirementsPhase segregated protection Yes

Principal of operation – high impedance yesRatio correction for CTs YesStabilising resistor and voltage dependent resistor included

yes

Sensitivity- For earth faults- Operating time at 5X

ms <25

reject harmonics produced by CT saturation yesOther requirementsEvent recording function yes

Disturbance recording function yes

Page | 74




Latching output contact yes



yes


yes



yes


yes


yes


60068-2-

yes


yes


yes


Yes Yes yes

InsulationRated Insulation1000V high impedance protection CT inputs

Yes

Page | 75




250V for other circuits1000V open contact withstand Dielectric testsIEC 60255-5-Series C of table 1Impulse voltageIEC 60255-5 test voltage 5kv

Yes

yes


Yes

Yes

Yes

Yes

Yes


TRIP CIRCUIT SUPERVISIONManufacturer to be specifiedType referenceRelay design(Electro-mech, static, numerical)Auxialliary Voltage range (Vn= 110 V dc Vdc 77-150Operating time msSupervision of the whole trip circuit with CB open and closedRelay operated indicator


60068-2-

yes


yes


yes

Mechanical Environment

Page | 76




Vibration IEC 60255-21-1Shock and bump IEC 60255-21-2Seismic IEC 60255-21-3

Yes Yes yes


Yes

Yes

yes


Yes

Yes

Yes

Yes

Yes


MULTI CONTACT TRIPPING RELAYSManufacturer to be specifiedType referenceAuxialliary Voltage range (Vn= 110 V dc Vdc 77-150Is relay mechanically latched or self resettingMethod used to reset latched relay (Hand or electrical0Minimum voltage at which reliable operation occurs Yes


yes

Relay operated indicator type yes

Type tests

Page | 77




AtmosphericOperation -25C and 55C for 96hrs, IEC 60068-2-1Transport/storage – 25 and 70C for 96 hrs, IEC

60068-2-

yes


yes


yes


Yes Yes yes


Yes

Yes

yes

Electromagnetic compatibility1Mhz Burs disturbance test,IEC 60255-22-1 severity class IIElectrostatic dischargeIEC 60255-22-2 severity class IIIRadiated Electromagnetic field DisturbanceIEC 60255-22-3 severity class IIITest method A, 27Mhz through 500MhzElectromagnetic EmissionsIEC 60255-25Fast transient disturbanceIEC 60255-22-4 severity level IvType test certificates to be provided

Yes

Yes

Yes

Yes

Yes

Table 26: Telecommunication SystemMinimum Requirements Data offered by

BidderDescription Unit DataApplicable standards for insulation / EMC / ESD tests:6.0 Protection IEC 60265-4, -

Page | 78




5, -6 (22-1, -2, -3, -4) class III

IEC 6081-1, -2, -3, -4

IEC 60834-17.0Telecontrol IEC 60255-4, -

5, -6, class II/IIIIEC 60801-1, -

2, -3, -4IEC 60870-1, -

2, -3, -4OLTE transceiver characteristics:

8.0Optical wave length nm 1550 or 13109.0Optical source laser10.0 Optical source life span better than 15

years11.0 Optical fibre type single mode12.0 Optical connectors Type FC-PC13.0 Jitter performance: ITU-T recom-

mendation G.823

14.0 Power supply V 48 V DC15.0 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 minimum18.0 Core diameter m 8.3 or 9 with a

± 3% tolerance19.0 Cladding design m either matched

or depressed20.0 Clad diameter m 125.0 ± 221.0 Core-clad concentricity less than 2%22.0 Coating diameter m 250 ± 1523.0 Coating concentricity ≥ 0.724.0 Attenuation:1310 nm dB/km ≤ 0.401550 nm dB/km ≤ 0.22

25.0Bending attenuation:

Page | 79




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 ≤ = 1250Chromatic dispersion:

28.0 Zero dispersion at: nm 1310 ± 1229.0 Zero dispersion slope (max.) ps/nm²/km 0.09230.0 Zero dispersion at nm 1550 ± 1531.0 Zero dispersion slope (max.) ps/nm²/km 0.08532.0 Mode field diameter:1300 nm mm 9.30 ± 0.501550 nm mm 10.50 ± 1.0033.0 IL proof test level g/m² 35 x 106

34.0 Splice attenuation dB/splice 0.0235.0 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.823Teleprotection interface (test voltages according to IEC 60255-4):

37.0 Isolation (0.5 J, 1 min.) kV/DC 238.0 Pulse 1.2/50 µs kV 1

Telephone system:39.0 Number of subscriber lines 140.0 Number of trunk lines 141.0 Equipped spare capacity after

commissioning% 30

42.0 Capacity for additional lines % 50 (min.)

Page | 80



Table 27: Control and Monitoring SystemMinimum Requirements Data offered by

BidderDescription Unit DataPanels:6.0 Pre-wired yes

7.0Floor-mounted yes8.0Steel sheet thickness mm ≥ 29.0Protection class IP 5210.0 Maximum height m 2.2511.0 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 110Central Processing Units (PCU):

14.0 Microprocessor bus architecture bit 32/6415.0 Memory for system software type PROM16.0 Application software in battery-buffered

RAM or EPROM / Flash-PROMyes

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 % 25Video display and control system:

24.0 Power supply from station batteries V DC 11025.0 Number of monitors for each control Pcs. 3

Page | 81




system26.0 Number of function keyboards:liquid-proof keyboard Pcs. 1exchangeable extended keyboard Pcs. 127.0 Hardcopy printer Pcs. 128.0 Event and record printer Pcs. 229.0 Bus data channels Pcs. 130.0 Event list events min. 40031.0 Alarm list alarms min. 10032.0 Resolution:within computer ms 1between computers ms 533.0 External alarm outputs Pcs. 634.0 Diagramme change speed sec. 535.0 Diagramme updating:event-driven sec. 1cyclic, adjustable sec. 3 to 1036.0 Transfer of manual command inputs sec. 1

Communication links:37.0 Data transmission rate Mbit/sec. 1038.0 Data transmission mode as serial bus to

IEEE 802.3 and CSMA / CD (Ethernet type)yes

39.0 Conductor as duplex fibre optic cable yes40.0 Data transmission rate Mbit/sec. 1041.0 Number of buses per processing unit no. 242.0 Nodes per buses Pcs. max. 4543.0 Transmission range (with fibre optic cable) m 1000

Programming and services unit (personal computer or programming unit):

notebook or personal com-

puter44.0 Main processor type (or better) Pentium 166xx45.0 Main memory Mbyte min. 51246.0 Hard disc Gbyte min. 10047.0 Floppy disc drive 3.5" Mbyte 1.4448.0 Monitor type active LCD49.0 Interfaces serial and par-

allel50.0 Operating system OS, MS-DOS or

UNIX, Win-dows, latest

version

Page | 82




51.0 Weight kg < 1052.0 Ambient temperature:Operation °C 15 - 50Storage °C 0 - 60Transport °C -30 - +60

Electromagnetic interference tests:53.0 Insulation test, voltage test, individual test:Applicable standards IEC 60255-5,

IEC 60950Test voltage AC kV/Hz 2/50or DC (1 minute) kV 2.85external circuits against internal circuitsexternal circuits against earth and against earth

otherinternal circuits against earth54.0 Impulse voltage test, type test:Applicable standards IEC 60255-5Test level level IIITest voltage kV 5External circuits against internal circuits µs pulse: 1.2/50External circuits against earth

HF interference test, type test:55.0 Applicable standard IEC 60255-22-156.0 Test level III57.0 Test voltage (1 MHz attenuated, repeat

rate 400/sec.):Common mode voltage kV 2.5Differential voltage kV 1.0

Transient disturbance values / burst, type test58.0 Applicable standard IEC 60801-259.0 Test voltage kV/ns 4, 5/5060.0 Burst duration ms 1561.0 Repetition time ms 300

Electromagnetic fields, type test62.0 Applicable standards IEC 60801-3

IEC 60255-22-3Electromagnetic discharges, type test

63.0 Applicable standard IEC 60801-264.0 Test conditions front door

closed, closed panel (covered)

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65.0 Sharpness 366.0 Test voltage kV 8

Electric meter67.0 Basic current lb A 3 x 568.0 Load capacity in % of lb:Metering 400Thermal 500Short circuit peak value of

50 lmax and >25 lmax during 1 µs

69.0 Rated voltage (Un) V 3 x 230 / 40070.0 Rated frequency Hz 5071.0 Accuracy class 0.272.0 No creep on voltage variation V 0.8 ÷ 1.15 Un

73.0 Starting load max. A 0.05% lb

Table 28: Under Ground Cable

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Manufacturer to be specifiedLocation of manufacturing site to be specifiedManufacture quality certification ISO 9001Circuit rating required MVA 901.0 General description of cableNumber of cores 1System voltage kV 132Conductor size mm2

Insulation type XLPEMetal sheath type LeadOversheath type HDPE2.0 Insulation CordinationHighest system Voltage (Um) (Insulation class) kV 145Nominal Voltage between conductors kV 132

Rated frequency Hz 50Nominal Voltage between conductor and sheath (Uo) kV 76.2Rated Withstand impulse Voltage( altitude < 1000 M) kV 650Rated short duration power frequency withstand voltage (altitude < 1000 M)

kV 275

3.0 Rating 1maximum continuous direct- buried current rating assumingGround temperature of 30o C, Max. Soil Thermal resistivity of 2.7Km/W, Flat formation configuration and special bonding of metal sheathGuaranteed current rating Single TrenchCalculation Method

A

To be specified

IEC 60840,60287

Maximum continuous in air current , assumingAir Temperature (in shade) of 40oC, Flat formation configuration spacing of 250mm, Thermally independent of other circuits and special bonding of metal sheathCalculation Method

ATo be specified

IEC 60840, 60287

maximum permissible core temperature for continuous operation

oC 90

Sort circuit capacity for 1 sec

Permissible Max. sheath TemperaturePermissible Max. Conductor Temperature

kA

oCoC

To be specified

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Permissible emergency OverloadApplied 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

AoC

HoursHoursHours

to be specified

Applied on 50% continuous load Emergency current rating Max. Emergency temperature Allowable duration/ operation Allowable total duration/ operation


AoC

HoursHoursHours

to be specified

Applied on 100% continuous load Emergency current rating Max. Emergency temperature Allowable duration/ operation Allowable total duration/ operation


AoC

HoursHoursHours

to be specified

4.0 Construction featuresConductor

Material Nominal cross section Shape and type of conductor Overall diameter Water blocking method Semi conductor blinder tape

mm2

mm

Aluminum

tape/yarnyes

Conductor Screen Material

Nominal Thickness Minimum Thickness Nominal overall diameter Compound identification reference

mmmmmm

Fully bonded Semicon. XLPE

yes

Insulation Material Nominal Thickness Minimum Thickness Nominal overall diameter Max. Continuos operating temperature

mmmmmmoC

XLPE

90

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Compound identification referenceMaximum stress at nominal voltage

At conductor screen At insulator screen

Maximum stress at impulse voltage At conductor screen At insulator screen

kV/mmkV/mm

kV/mmkV/mm

yes

Insulation screen Material

Nominal Thickness Nominal overall diameter Compound identification reference Indelible ink marking on screen

mmmm

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 da

ys

VCVyesdrydry

Bedding for moisture absorption Type of Material Nominal Thickness Mimimum thickness Nominal overall diameter

mmmmmm

Metallic screen Type and Material Nominal Thickness Mimimum thickness Nominal diameter over screen Cross sectional area of he screen Short time current density(1sec)

mmmmmmmm2

kA/mm2

Copper wire

Bedding/Binder tape Type and Material Nominal Thickness Mimimum thickness Nominal overall diameter over bedding

mm

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mmmm

Metallic screen Type and Material Nominal Thickness Mimimum thickness Nominal diameter over screen Cross sectional area of he screen

Short time current density(1sec)

mmmmmmmm2

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

mmmm

Km/w

HDPEBlack

YesSpecify max. 6.0

Type of conductive outer layer Graphite/or semicon. polymer

Weight of completed cable Copper Insulation Lead alloy Gross weight

Kg/mKg/mKg/mKg/m

to be specified

5.0 lossesMaximum 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

Total loss of cable per metre/ phase of three phase circuit W/m to be specified35.0Electrical valuesMaximum dc resistance of conductor at 20o C µΩ/m to be specified

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Maximum ac resistance of conductor at operating temperature C

µΩ/m to be specified

Equivalent reactance of three phase circuit µΩ/m to be specifiedElectrostatic 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 specifiedCharging capacity of three phase system (at Uo) Var/m to be specifiedMax. dielectric loss factor of cable at nominal voltage and frequency at a conductor temperature of;

20 oC 90 oC

to be specified

Positive and negative impedance Ω/m to be specifiedZero sequence impedance (as installed conditions)

Resistance Reactance Capacitance

Ω/mΩ/mpF/m

to be specified

Surge impedance Ω/m to be specified36.0Bonding and earthingType of special bondingMax. 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 TestingRoutine 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

Partial discharge monitoring Oversheath DC voltage test

kV

1.7Uo for 1 hour< 10pC

12kV for 15 minutes

Page | 89



Table 29: 132 kV Isolators without Earthing Switches


Manufacturer to be specifiedType to be specified

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Installation outdoorRated maximum voltage kV 145Rated service voltage kV 132Rated lightning impulse (BIL)(at altitude less than 1000 M) kV peak 650Power frequency withstand voltage (at altitude less than 1000 M) kV rms 275Rated short-time current kA 31.5Rated frequency Hz 50Number of poles 3Rated current A 1600Minimum creepage distance mm/kV 31Operation motorizedOpening time sec. ≤ 30Closing time sec. ≤ 30Rated peak withstand current kA 100Minimum 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

Rated supply voltage for operating mechanism V DC 110Current required at rated supply voltage to operate isolator: A to be specifiedHand operating facility yesLocking arrangement in Off and On yesAutomatic isolation of control supplies when lock off yesRated power of operating coil W to be specifiedRated Motor power W to be specifiedFacing of terminals and contacts to be specifiedShape of terminals of the main circuit to be specifiedNumber and type of auxiliary switches:

Tin plated for Isolator Yes For the disconnector 5 NO , 5 NC

Auxiliary contact rating A > 10Wind load Pa

(N/mm²)to be specified

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

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Approximate dimensions in open position mm to be specifiedApproximate dimensions in close position mm to be specifiedWith all accessories for installation to be specifiedApplicable Standard(s) IEC 62271-102

Table 30: 33 kV Isolators without Earthing Switches

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

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

Hand operating facility yes

Locking arrangement in Off and On yes

Automatic isolation of control supplies when lockoff yes

Rated power of operating coil W

Rated Motor power W


Operation motorized

Opening time sec. ≤ 30

Closing time sec. ≤ 30

Rated peak withstand current kA 100

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Minimum clearance in air:

6.0 Between poles mm 500

7.0 To earth mm 435

8.0 For isolating distance mm to be specified

Type of operating mechanism:

9.0 For disconnector Motorised

Rated supply voltage for operating mechanism V DC 110

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

Facing of terminals and contacts to be specified

Shape of terminals of the main circuit to be specified

Number and type of auxiliary switches:

10.0For the disconnector 5 NO , 5 NC

Auxiliary contact rating A > 10

Wind load Pa (N/mm²)

to be specified

Mechanical terminals load:

11.0Straight load N 500

12.0Cross load N 170

Weight of complete disconnector:

13.0With earthing switch kg to be specified

14.0Without earthing switch kg to be specified

Approximate dimensions in open position mm to be specified

Approximate dimensions in close position mm to be specified

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Applicable Standard(s) IEC 62271-102

Page | 95


DEFINITIONS AND ABBREVIATIONS - Kenya · Web viewDCshall mean direct current INshall mean...

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