Huge source of knowledge about switchgear
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- Jun- 2019 -6 JuneFuse
MV fuse voltage and current interrupting curves
Figure shows typical current(lower) & voltage(upper) waveforms when a fuse interrupts a current. When the…
Read More » - 5 JuneHigh Voltage Circuit Breaker
Principle of controlled switching (CS) in circuit breaker
CS is a method for eliminating harmful transients via time controlled switching operations. Closing or…
Read More » - 4 JuneHV AC Switchgear
Two important factor in high voltage switchgear insulator according to IEC
Minimum distance between sheds: In left figure factor “c” is the minimum distance between adjacent…
Read More » - 3 JuneGas Insulated Switchgear
Disconnector with damping resistor(DR) in GIS
The damping of VFTO by integration of a damping resistor is a well proven technology.…
Read More » - 2 JuneHigh Voltage Circuit Breaker
Effect of heavy snow for high voltage switchgear in substations
Snow drifts can cause a serious threat to site access and inside the substation if…
Read More » - 1 JuneSwitchgear Testing
SF6 portable devices
Photo acoustic infrared detectors are based on the pressure waves emitted by the SF6 molecules…
Read More » - May- 2019 -31 MayGenerator Circuit Breaker
Hybrid synthetic direct test method for generator circuit breaker (GCB)
In synthetic test circuits, normally applied for high-voltage circuit-breaker testing, current is supplied by a…
Read More » - 30 MayGas Switchgear
Recommended routine test for MV GIS switchgear according to IEEE
Routine tests are a suitable means in order to verify the guaranteed quality and the…
Read More » - 29 MayHigh Voltage Circuit Breaker
Energisation of back to back(b to b) cables by circuit breaker according to IEC
The energisation of a cable by the closing of a CB will result in a…
Read More » - 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…
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