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- Aug- 2019 -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…
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…
Read More » - Jul- 2019 -31 JulyHigh Voltage Circuit Breaker
Making condition under short circuit current for switchgear
The making current flow does not start as the contacts touch but several milliseconds earlier…
Read More » - 30 JulyHigh Voltage Circuit Breaker
Typical difference between SF6 and vacuum switchgear in high voltage
Interruption of fault current with an associated very steep rate of rise of transient recovery…
Read More » - 29 JulyGas Insulated Switchgear
Gas monitoring systems used in GIS according to IEEE
These systems indicate the current SF6 density levels in each individual gas zone. The different…
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