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- Aug- 2019 -10 AugustGenerator Circuit Breaker
Out of phase in generator circuit breaker (GCB)
An out-of phase condition occurs when a making operation of the GCB is performed at…
Read More » - 9 AugustGas Insulated Switchgear
Metal material used in GIS
Steel: There are two basic tasks of the enclosure: to keep the gas pressure inside…
Read More » - 8 AugustHigh Voltage Circuit Breaker
Arc voltage in high voltage gas circuit breakers
In gas circuit breakers, the arc voltage is usually in the range of a few…
Read More » - 7 AugustHigh Voltage Circuit Breaker
Dielectric combined voltage tests (BIAS test) on circuit breakers
In this test the circuitbreaker is submitted to two separate voltages at the same time:…
Read More » - 6 AugustHigh Voltage Circuit Breaker
Switching overvoltage mitigation methods in EHV
Fast insertion of shunt reactors: Purpose of shunt reactors is to provide compensation of transmission…
Read More » - 5 AugustMV AC Switchgear
Vacuum circuit breaker contact shapes
Arc should be kept in a spiraling motion or in a diffuse. the spiraling motion…
Read More » - 4 AugustGas Insulated Switchgear
Ground Switches in GIS
Ground switches have a moving contact that opens or closes a gap between the high…
Read More » - 3 AugustHigh Voltage Circuit Breaker
Hybrid (vacuum-gas) high voltage circuit breaker prototype
A hybrid circuit breaker consists of a series connected vacuum- and SF6(CO2) interrupter. The vacuum…
Read More » - 2 AugustHigh Voltage Disconnector Switch
Example of switching surge caused by disconnector switches (line switch)(LS)
The operating time of a conventional open-air LS is 2–3s, while that of an LS…
Read More » - 1 AugustHigh Voltage Circuit Breaker
Puffer interruption in gas HV CB
The main contacts, which are placed concentrically outside the arcing contacts, are in Fig a…
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