Huge source of knowledge about switchgears
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- Aug- 2019 -11 AugustHigh Voltage Circuit Breaker
High voltage switchgear insulators creepage distance extending ways in substations
Measure or estimate site condition severity, select candidate profile and creepage guidance, choose applicable laboratory…
Read More » - 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 AugustVacuum 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…
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