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- Mar- 2019 -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 –…
Read More » - 13 MarchMV AC Switchgear
History and Schematic drawing of the first vacuum interrupter and vacuum circuit breaker
The word vacuum comes from the Latin word “vacuus” which means “empty”, but in practice,…
Read More » - 12 MarchHV AC Switchgear
Anti pumping function in circuit breakers operating mechanism
The antipumping function is a very important feature of control circuits. Without the anti-pump function,…
Read More » - 11 MarchSwitchgear Testing
SF6 gas detection thermal camera high voltage substation
One of way to SF6 gas leakage detection in substation is a reliable infrared camera…
Read More »
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