DEFINITIONS AND ABBREVIATIONS - Kenya · Web viewDCshall mean direct current INshall mean...
Transcript of 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
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
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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Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
% shall mean percentagePascal 1 N/m2cst shall mean centistoke
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Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
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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Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by Bidder
Description Unit Data
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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Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by Bidder
Description Unit Data
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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Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by Bidder
Description Unit Data
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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Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by Bidder
Description Unit Data
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
HV, LV neutral bushings kV to be specified
Impulse withstand voltage:
HV bushing kV to be specified
LV bushing kV to be specified
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Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by Bidder
Description Unit Data
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
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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Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by Bidder
Description Unit Data
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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Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
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
Type 3-phase, oil-immersed,
with 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 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 10
Rated frequency Hz 50Rated current
Primary side (high voltage) A to be specified
Secondary side (low voltage) A to be specified
Vector group Dyn11Impedance voltage of:
ONAN centre tap % 9.8Insulation uniformType of cooling ONANTapping range ± 1.67%
in ± 8 steps
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Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by BidderDescription Unit Data
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
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
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 0.2Painting Admiralty
Grey shade No. 632 as
per BS 381CDimensions
length mm to be specified
width mm to be specified
height mm to be specified
distance between wheels' centres mm to be
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Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by BidderDescription Unit Data
specifiedTotal weight kg to be
specifiedOil weight kg to be
specifiedApplicable standard(s) IEC 60076
IEC 60354
Transformer Bushings
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
specifiedLV bushing kV to be
specifiedTV bushing kV to be
specifiedHV, LV neutral bushings kV to be
specified
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Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by BidderDescription Unit Data
Impulse withstand voltage:HV bushing kV to be
specifiedLV bushing kV to be
specified
On-Load Tap ChangerManufacturer to be
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
Type to be specified
Supply voltage V 400/230Insulation level voltage to earth kV rms to be
specifiedInsulation level
Voltage to earth kV rms to be specified
Impulse test voltage kV peak to be specified
One-minute power frequency test voltage (50 Hz)
kV rms to be specified
Internal insulation levels / one-minute power fre-quency test voltage:
between selected and pre-selected tap kV peak to be specified
kV rms to be
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Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by BidderDescription Unit Data
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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Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Table 3: 132/33 kV 15 MVA Power Transformer and On load Tap changer
Minimum Requirements Data offered by BidderDescription Unit Data
Manufacturer to be specified
Type 3-phase, oil-immersed,
with 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 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 15
Rated frequency Hz 50Rated current
Primary side (high voltage) A to be specified
Secondary side (low voltage) A to be specified
Vector group Dyn11Impedance voltage of:
ONAN centre tap % 9.8
Insulation uniformType of cooling ONANTapping range ± 1.67%
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Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by BidderDescription Unit Data
in ± 8 stepsNo-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
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
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 0.2Painting Admiralty
Grey shade No. 632 as
per BS 381CDimensions
length mm to be specified
width mm to be specified
height mm to be specified
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Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by BidderDescription Unit Data
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 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
specifiedLV bushing kV to be
specifiedTV bushing kV to be
specifiedHV, LV neutral bushings kV to be
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Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by BidderDescription Unit Data
specified
Impulse withstand voltage:HV bushing kV to be
specifiedLV bushing kV to be
specified
On-Load Tap ChangerManufacturer to be
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
Type to be specified
Supply voltage V 400/230Insulation level voltage to earth kV rms to be
specifiedInsulation level
Voltage to earth kV rms to be specified
Impulse test voltage kV peak to be specified
One-minute power frequency test voltage (50 Hz)
kV rms to be specified
Internal insulation levels / one-minute power fre-quency test voltage:
between selected and pre-selected tap kV peak to be specified
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Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by BidderDescription Unit Data
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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Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Table 5: 132 kV Circuit Breaker
Minimum Requirements Data offered by Bidder
Description Unit Data
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
(at altitude less than 1000 M)
kV rms 275
Rated frequency Hz 50
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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Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by Bidder
Description Unit Data
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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Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by Bidder
Description Unit Data
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
Number of closing coils 1
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
Page | 23
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by Bidder
Description Unit Data
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
Page | 24
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Table 6: 132 kV Isolators with Earthing Switches
Minimum Requirements Data offered by BidderDescription Unit Data
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
Page | 25
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by BidderDescription Unit Data
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
Page | 26
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by Bidder
Description Unit Data
Manufacturer to be specified
Type of circuit breaker outdoor type
Type of arc quenching medium Vacuum
Model to be specified
Rated maximum voltage kV 36
Rated service voltage kV 33
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 frequency Hz 50
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
Page | 27
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by Bidder
Description Unit Data
Number of closing coils 1
Operating sequence - O - 0.3 s - CO - 3 min - CO
Annual rate of gas leakage at normal pressure % ≤ 1%
Minimum creepage distance mm/kV 25
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
Weight kg to be specified
Page | 28
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by Bidder
Description Unit Data
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
Applicable standard(s) IEC 62271-100
Page | 29
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Table 9: 33 kV Isolators with Earthing Switches
Minimum Requirements Data offered by Bidder
Description Unit Data
Manufacturer to be specified
Type to be specified
Installation outdoor
Rated maximum voltage kV 36
Rated service voltage kV 33
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
Rated frequency Hz 50
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
Minimum creepage distance mm/kV 31
Operation motorized
Opening time sec. ≤ 30
Page | 30
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by Bidder
Description Unit Data
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:
Page | 31
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by Bidder
Description Unit Data
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
Page | 32
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Table 10: 132 kV Voltage Transformer
Minimum Requirements Data offered by BidderDescription Unit Data
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
Page | 33
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by BidderDescription Unit Data
Permissible secondary short circuit current A to be specifiedApplicable standard(s) IEC 60044-2
60044-5
Page | 34
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Table 11: 132kV Current Transformer
Minimum Requirements Data offered by Bidder
Description Unit Data
Manufacturer's name to be indicated
Type to be specified
Model to be specified
Installation outdoor
Rated maximum voltage kV 145
Rated service voltage kV 132
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 frequency Hz 50
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 | 35
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by Bidder
Description Unit Data
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
Minimum creepage distance mm/kV 31
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
Page | 36
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by Bidder
Description Unit Data
Dimensions mm to be specified
With all accessories for installation to be specified
Applicable standard(s) IEC 60044-1
Page | 37
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Table 12: 132kV Surge Arresters
Minimum Requirements Data offered by Bidder
Description Unit Data
Manufacturer's name to be indicated
Type to be specified
Installation outdoor
Nominal system voltage kV 132
Rated operating voltage (Ur) kV 108
Rated continuous operating voltage (Uc) kV 84
Rated frequency Hz 50
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
Page | 38
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by Bidder
Description Unit Data
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
Page | 39
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Table 13: 33kV Voltage Transformer
Minimum Requirements Data offered by BidderDescription Unit Data
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
Page | 40
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by BidderDescription Unit Data
Applicable standard(s) IEC 60044-2, 60044-5
Page | 41
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Table 14:33kV Surge Arresters
Minimum Requirements Data offered by Bidder
Description Unit Data
Manufacturer's name to be indicated
Type to be specified
Installation outdoor
Nominal system voltage kV 33
Rated operating voltage (Ur) kV 30
Rated continuous operating voltage (Uc) kV 21
Rated frequency Hz 50
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
Page | 42
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by Bidder
Description Unit Data
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
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
Page | 43
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Table 15:Busbar Conductor ACSR 435/55 mm²
Minimum Requirements Data offered by Bidder
Description Unit Data
Manufacturer's name to be indicated
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 | 44
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by Bidder
Description Unit Data
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 | 45
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Table 16: Busbar Shield Wire
Minimum Requirements Data offered by Bidder
Description Unit Data
Manufacturer's name to be indicated
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 | 46
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Table 17: 33kV Current Transformer
Minimum Requirements Data offered by Bidder
Description Unit Data
Manufacturer's name to be indicated
Type to be specified
Model to be specified
Installation outdoor
Rated maximum voltage kV 36
Rated service voltage kV 33
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 frequency Hz 50
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 | 47
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by Bidder
Description Unit Data
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
Minimum creepage distance mm/kV 31
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
With all accessories for installation to be specified
Applicable standard(s) IEC 60044-1
Page | 48
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Table 18: 33kV Surge Arresters
Minimum Requirements Data offered by BidderDescription Unit Data
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
Accessories: 132 kV surge arrester discharge counter
8.0 Type outdoor9.0 Counter indication digital
Page | 49
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by BidderDescription Unit Data
10.0Protection class IP 5411.0Number per 3 arresters 1
Applicable Standard(s) IEC 60099-1, 1A, 2, 4
Page | 50
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Table 19: 132kV Dead-End and Suspension Insulators - Discs
Minimum Requirements Data offered by BidderDescription Unit Data
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
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Table 20: 132kV Post-Type Insulators
Minimum Requirements Data offered by BidderDescription Unit Data
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
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Table 21: 33/0.4kV Auxiliary Transformer
Minimum Requirements Data offered by Bidder
Description Unit Data
Manufacturer to be specified
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 frequency Hz 50
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
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by Bidder
Description Unit Data
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
Applicable standard(s) IEC 60076
Page | 54
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Table 22: Low Voltage AC Distribution Panel for Auxiliary Services
Minimum Requirements Data offered by Bidder
Description Unit Data
General
Manufacturer's name to be specified
Type metal clad, in-door, air insu-
lated
Installation indoor
Rated Voltage V 400/230
Rated frequency Hz 50
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
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by Bidder
Description Unit Data
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
Weight kg to be specified
Applicable standard(s) IEC 60364
IEC 60439
VDE 0100
Page | 56
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Table 23: Battery Bank 110 V DC, 300 Ah
Minimum Requirements Data offered by BidderDescription Unit Data
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
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
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
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by BidderDescription Unit Data
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
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by BidderDescription Unit Data
IEC 60947
Page | 60
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
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
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by BidderDescription- Protection and indication system Unit Data
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
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by BidderDescription- Protection and indication system Unit Data
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
Minimum Requirements Data offered by BidderDescription- Protection and indication system Unit Data
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
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by BidderDescription- Protection and indication system Unit Data
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
Self checking facility yes
Integral inter-trip 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)Physical 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 Insulation Yes
Page | 64
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by BidderDescription- Protection and indication system Unit Data
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
Minimum Requirements Data offered by BidderDescription- Protection and indication system Unit Data
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
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by BidderDescription- Protection and indication system Unit Data
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
carry continuous current 1A yesMake 6A max. for 0.2s yesBreak dc 50W resistive25W inductive (L/R 40ms)
yes
Self checking facility yes
Integral inter-trip 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)Physical 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 60255-21-1 Yes
Page | 66
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by BidderDescription- Protection and indication system Unit Data
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
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
Minimum Requirements Data offered by BidderDescription- Protection and indication system Unit Data
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
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by BidderDescription- Protection and indication system Unit Data
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
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
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)Physical links (RS485/Fibre optic)Protocol supported- IEC 60870-5-101- IEC 61850
yes
Page | 68
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by BidderDescription- Protection and indication system Unit Data
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 voltageIEC 60255-5 test voltage 5kv
Yes
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
Minimum Requirements Data offered by BidderDescription- Protection and indication system Unit Data
Multifunction Directional Overcurrent & Earth fault protection (50/51/50N/51NManufacturer to be specified
Page | 69
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by BidderDescription- Protection and indication system Unit Data
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
Programmable scheme logic yesUser friendly HMI, Window based software for relay setting, relay configuration and event,disturbance and fault record management .
yes
Page | 70
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by BidderDescription- Protection and indication system Unit Data
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)Physical links (RS485/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 voltageIEC 60255-5 test voltage 5kv
Yes
Yes
yes
Electromagnetic compatibility
Page | 71
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by BidderDescription- Protection and indication system Unit Data
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
Minimum Requirements Data offered by BidderDescription- Protection and indication system Unit Data
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
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by BidderDescription- Protection and indication system Unit Data
Latching output contact 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
Self checking facility yes
Integral inter-trip 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)Physical links (RS485/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 inputs
Yes
Page | 73
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by BidderDescription- Protection and indication system Unit Data
250V 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
Minimum Requirements Data offered by BidderDescription- Protection and indication system Unit Data
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
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by BidderDescription- Protection and indication system Unit Data
Latching output contact 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
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)Physical links (RS485/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 inputs
Yes
Page | 75
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by BidderDescription- Protection and indication system Unit Data
250V 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
Minimum Requirements Data offered by BidderDescription- Protection and indication system Unit Data
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
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 Environment
Page | 76
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by BidderDescription- Protection and indication system Unit Data
Vibration 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 voltageIEC 60255-5 test voltage 5kv
Yes
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
Minimum Requirements Data offered by BidderDescription- Protection and indication system Unit Data
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
carry continuous current 5A yesMake 30A max. for 0.2s yesBreak dc 50W resistive25W inductive (L/R 40ms)
yes
Relay operated indicator type yes
Type tests
Page | 77
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by BidderDescription- Protection and indication system Unit Data
AtmosphericOperation -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 voltageIEC 60255-5 test voltage 5kv
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
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by BidderDescription Unit Data
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
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by BidderDescription Unit Data
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
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
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
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by BidderDescription Unit Data
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
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by BidderDescription Unit Data
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)
Page | 83
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by BidderDescription Unit Data
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
Page | 84
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by BidderDescription Unit Data
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
Page | 85
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by BidderDescription Unit Data
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
Max. average duration/average on total life of cable
AoC
HoursHoursHours
to be specified
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
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
Page | 86
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by BidderDescription Unit Data
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
Page | 87
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by BidderDescription Unit Data
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
Page | 88
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by BidderDescription Unit Data
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
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Table 29: 132 kV Isolators without Earthing Switches
Minimum Requirements Data offered by BidderDescription Unit Data
Manufacturer to be specifiedType to be specified
Page | 90
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by BidderDescription Unit Data
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
Page | 91
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by BidderDescription Unit Data
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
Page | 92
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by Bidder
Description Unit Data
Manufacturer to be specified
Type to be specified
Installation outdoor
Rated maximum voltage kV 36
Rated service voltage kV 33
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
Rated frequency Hz 50
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
Minimum creepage distance mm/kV 31
Operation motorized
Opening time sec. ≤ 30
Closing time sec. ≤ 30
Rated peak withstand current kA 100
Page | 93
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by Bidder
Description Unit Data
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
Page | 94
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012
Republic of Kenya Lot 3A Substation Technical Schedules –SubstationsKenya Electricity Transmission Company
Minimum Requirements Data offered by Bidder
Description Unit Data
With all accessories for installation to be specified
Applicable Standard(s) IEC 62271-102
Page | 95
Kenya Power Transmission System Improvement Project PROJECT NO: P-KE-FA0-004-5083020 | March 2012