Huge source of knowledge about switchgear
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- Mar- 2019 -23 MarchSwitchgear Testing
Three phase high power synthetic current injection test methods for circuit breakers
This test just apply to 3 pole operation circuit breakers. As Fig these circuits use…
Read More » - 22 MarchGas Insulated Switchgear
Minor inspection list for gas insulated switchgear GIS
This inspection can be performed every 5–10 years on GIS components but the inspection can…
Read More » - 21 MarchHigh Voltage Circuit Breaker
Circuit breakers coil current profile analysis
The conversion of the electric command signal to a mechanical signal, typically to move the…
Read More » - 20 MarchSwitchgear Testing
Lightning impulse voltage withstand test for circuit breakers
Lightning impulse voltage (LIWL) tests and switching impulse voltage tests are conducted for the evaluation…
Read More » - 19 MarchMV AC Switchgear
Closing and tripping sequence of medium voltage auto recloser
In this figure we can see the working of the auto-recloser when a permanent fault…
Read More » - 18 MarchHigh Voltage Disconnector Switch
High voltage horizontal center break two column disconnector switch
This disconnector type is used for rated voltages of 36…
Read More » - 17 MarchHigh Voltage Disconnector Switch
High voltage pantograph disconnector switchs ABB design
In installations for higher voltages (≥ 72.5 kV) and multiple busbars, the pantograph disconnectors requires…
Read More » - 16 MarchHigh Voltage Disconnector Switch
Earthing switch in medium voltage switchgear
Earthing switches are commonly used and installed in medium voltage switchgear. When isolating any of…
Read More » - 15 MarchHigh Voltage Circuit Breaker
Initial Transient Recovery Voltage (ITRV) for high voltage circuit breakers
A TRV stress similar to that which occurs at a short-line fault may occur, due…
Read More » - 14 MarchHigh Voltage Disconnector Switch
Ageing phenomena of current pass blades in high voltage disconnector switch
The causes for this failure mode are different. It has three typical origins Electrical –…
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