Bushings
Capacitor Switch
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Specification
Maximum voltage rating 12 kV
Maximum current rating 200 A
Creepage Distance 450 mm
Line to ground BIL 95 kV
Open contact 95 kV
Nominal current 10 A
Dry, 1 minute with stand test 36 kV
Wet, 10 seconds with stand test 30 kV
Line to ground insulation level 95 kV
Open contact insulation level 95 kV
Nominal current 10 A
Capacitive Switching Current 200 A
Symmetric Short time Current 4500 A for 1 Second
Asymmetric Short time Current 95000 A for 1 Second
Asymmetric Making Current 9000 A for 1 Second
Dimension of OLTC VIEWCLOSE
Load Break Switch
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Specification
Rated Voltage 11 kV
Maximum System Voltage 12 kV
Rated Current 630 A
Rated Short time with stand Current 20 kA
Rated peak with stand Current 50 KA
Rated Short Circuit making Current 50 kA
Rated breaking Current of Load with Power 630 A
Rated close ring breaking Current 630 A
Rated break Cable Charging Current 10 A
Rated idle load Transformer breaking 1600 kVA
Insulation level(rms) 35 kV
Mechanical lifetime(C-O cycle)
a)Vacuum load Switch 10000 Nos
b)Isolator and Earth Switch ≥ 2000 Nos.
Three phase simultaneous closing ≥ 5 ms
ABS 66
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Specification
Maximum voltage rating 72 kV
Maximum current rating 300 A
Direction of power flow Uni-Directional
Tapping arrangement Linear
OLTC design Single Compartment
Maximum number of tap position 23
Maximum operating step voltage 1000 V
Maximum operating voltage Over tapping range 20000 V
Maximum continuous voltage to ground 72000 V
Maximum continuous voltage between phases 720000 V
Peak emergency current 450 A
Weight of tap changer Without oil 620 Kg
Weight of tap changer with oil 1430 Kg
Oil content 980 liters
Impulse voltage between phases 350 kVp(1.2/50 micro seconds)
Impulse voltage between Tap changer to earth 350 kVp(1.2/50 micro seconds)
Impulse voltage between Adjacent contacts 70 kVp(1.2/50 micro seconds)
Impulse voltage across tapping Range 200 kVp(1.2/50 micro seconds
ABS 132
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Specification
Maximum voltage rating 132 kV(Graded neutral)
Maximum current rating 300 A
Maximum system voltage 85 kV
OLTC design Single Compartment
Maximum number of tap position 17
Maximum continuous current 300 A
Maximum operating step voltage 1800 V
Maximum operating over fine taps 14000 V
Maximum operating voltage over Coarse taps 14000 V
Maximum continuous voltage to Ground 85000 V
Time per tap change 4 – 6 seconds
Weight of tap changer without oil 650 Kg
Weight of tap changer with oil 1810 Kg
Impulse voltage between Tap changer to earth 350 kVp(1.2/50 micro seconds)
Impulse voltage between adjacent Contacts 200 kVp
Impulse voltage over pre selector 200 kVp
Impulse voltage between Selector and fine selector 250 kVp
OLG T5
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Specification
Maximum voltage rating 33 kV
Maximum current rating 1600 A
Direction of power flow Bi-Directional
Tapping arrangement Linear, coarse-fine, reversible
OLTC design Divertor switch
Maximum Number of tap position 33
Maximum recovery voltage 20 kV (across reversing switch)
Approximate time per tap change 2 seconds
Impulse test voltage to ground and between phases 34 kV/110kVp(for all live parts to)
Impulse voltage with stand 26 kV/70kVp(across tapping range)
Insulation between phase 33 kV
Insulation of all part to ground for continuous voltage 33 kV
Step voltage 1000 V
Power frequency withstand test voltage for all live parts to ground 34 kV
Power frequency with stand test voltage across tapping range 26 kV
Power frequency with stand voltage across one tap 15 kV
Maximum recovery voltage across reversing Switch 20 kV
Weight of OLTC without oil 750 kg
Oil quantity 960 liters