Huge source of knowledge about switchgear
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- Apr- 2019 -1 AprilGas Insulated Switchgear
Typical alarms in gas insulated switchgear (GIS)
Low gas density (approximately 90%) in each gas compartment and zone signifying a gas leak.…
Read More » - Mar- 2019 -31 MarchHigh Voltage Disconnector Switch
Operating mechanisms for high voltage disconnectors and earthing switches
Disconnectors are almost entirely actuated by motor-driven operating mechanisms, but manual mechanisms are also used…
Read More » - 30 MarchHigh Voltage Circuit Breaker
Controlled switching in shunt reactor switching in high voltage circuit breakers
During de-energization of shunt reactors, over voltages may be generated by multiple re ignitions. All…
Read More » - 29 MarchHigh Voltage Circuit Breaker
hydraulic & spring operating mechanism principle for circuit breakers
Photo from HMC-4 operating mechanism brochure copy right ABB High Voltage Products The hydraulic pump…
Read More » - 28 MarchVacuum Switchgear
Arc shield duties in vacuum interrupter
Shield is an essential component of the vacuum interrupters design. It has multiple purposes: To…
Read More » - 27 MarchHV DC Switchgear
High voltage HVDC switches in grid
Figure shows a typical Single Line Diagram for HVDC transmission scheme utilizing DC side switchgear.…
Read More » - 26 MarchGenerator Circuit Breaker
Heat pipe in generator circuit breaker (GCB)
An important issue for a generator circuit breaker is its current carrying capability.The rated currents…
Read More » - 25 MarchVacuum Switchgear
Current interrupting process in a vacuum circuit breakers
Vacuum interrupter arcs show two different modes of either diffuse or constricted arcs. The arc…
Read More » - 24 MarchVacuum Switchgear
Magnetic mechanism operation for medium voltage vacuum circuit breakers
The concept certainly predates Lindsay’s 1965 Patent that matches the magnetic mechanism to the vacuum…
Read More » - 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…
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