Huge source of knowledge about switchgear
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- Jun- 2019 -16 JuneMV AC Switchgear
Normal condition for indoor switchgear according to IEC
the ambient air temperature does not exceed 40 °C and its average value, measured over…
Read More » - 15 JuneVacuum Switchgear
The Self Actuating vacuum interrupter (SAVI) prototype
The SAVI version shown in Figure is identical to the classic vacuum interrupter as far…
Read More » - 14 JuneFault Current Limiter
Medium voltage Is Limiter equipment definition
In the Is limiter, a current limiting fuse is placed in parallel with a solid…
Read More » - 13 JuneMV AC Switchgear
IEC recommendation precautions list that may be taken by switchgear users and operators
Switchgears, can comprise some potential risks, some examples are: The enclosures, if any, may be…
Read More » - 12 JuneHV AC Switchgear
Asymmetrical current basic definition
Asymmetrical current results from: A short-circuit in the system initiated by an external event or…
Read More » - 11 JuneMV AC Switchgear
Direct started asynchronous MV motor switching by mv circuit breaker characters acc to IEC
Starting current: high current(I =6…7 × motor rated current). low power factor(cosϕ≈0,1…0,2). infrequent operation. due…
Read More » - 10 JuneVacuum Switchgear
Non-sustained disruptive discharge (NSDD) definition in switchgears according to IEC
NSDD has been seen on vacuum circuit breakers, may occur during capacitive current switching and…
Read More » - 9 JuneHigh Voltage Circuit Breaker
Two SF6 alternative gases in future for switchgears
Global warming will be a major issue in the future then using SF6 for switching…
Read More » - 8 JuneGenerator Circuit Breaker
Generator circuit breaker (GCB) important special requirements
High continuous current levels: GCB s must be able to carry high continuous current levels…
Read More » - 7 JuneGenerator Circuit Breaker
Verification of time quantities in commissioning test for Generator circuit breaker (GCB) according to IEC/IEEE
After a Generator circuit breaker has been installed commissioning tests shall be performed. The purpose…
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