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- May- 2019 -28 MaySwitchgear Testing
First trip testing method for circuit breakers
“First trip” test is important to determine a condition of the coil operating mechanism and…
Read More » - 27 MayHigh Voltage Disconnector Switch
Capacitive current switching test for high voltage AIS disconnector switch according to IEC
Upon restrike of the disconnector gap, the restriking current basically has three components: high-frequency(HF) component…
Read More » - 26 MayGas Switchgear
Pressure rise in internal arc in medium voltage switchgear
An internal arc fault is an unintentional discharge of electrical energy inside the switchgear. In…
Read More » - 25 MayHigh Voltage Disconnector Switch
Auxiliary interrupting devices for high voltage disconnector switches
The use of auxiliary interrupting devices as attachments on disconnecting switches has been the practice…
Read More » - 24 MayHV AC Switchgear
Voltage shapes for switchgears in grid according to IEC
The voltages and the overvoltages that stress the insulation shall be determined in amplitude,shape and…
Read More » - 23 MayGas Insulated Switchgear
Requirements for enclosure partitioning in GIS design according to IEC standard
Partitioning of a GIS is influenced by the service continuity requirements during maintenance, repair and…
Read More » - 22 MayHigh Voltage Circuit Breaker
General information for switchgear to be contained in the typetest reports according to IEC standard
the manufacturer the type designation and the serial number of the switchgear the rated characteristics…
Read More » - 21 MayMV AC Switchgear
Circuit breakers(<100kv) specific system application classification according to IEC
Two classes are defined: Class S1, circuit-breakers intended for use in cable systems Class S2,…
Read More » - 20 MaySwitchgear Testing
SF6 gas analyze in switchgear purposes
Before enters Service: To verify the quality and condition of the gas in the equipment…
Read More » - 19 MayGenerator Circuit Breaker
Source short circuit current definition and curves in generator circuit breakers according to IEEE & IEC standard
The rated system-source short-circuit breaking current is the highest system-source short circuit current at contact…
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