Huge source of knowledge about switchgear
Advertisement 
- Jun- 2019 -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…
Read More » - 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 »
Advertisement 