Posted inProtection Switchgear
current chopping
Current chopping is a term that came to our vocabulary with the advent of vacuum…
Posted inProtection Switchgear
Resistance switching
 To reduce the restriking voltage, RRRV and severity of the transient oscillations, a resistance is…
Posted inProtection Switchgear
Rate of rise of recovery voltage
 It is the rate of increase of restriking voltage and is abbreviated by R.R.R.V. its…
Posted inProtection Switchgear
Restriking voltage and recovery voltage
 It is the transient voltage that appears across the contacts at or near current zero…
Posted inProtection Switchgear
Formation of arc during circuit breaking
The phenomena of Arc During opening of current carrying contacts in a circuit breaker the…
Posted inTransmission and distribution
Long distance power transmission
 The electric power generated in a power station situated in a remote place is transmitted…
Posted inBasics
Block Diagram of an Electrical Drives
 Drive: A combination of prime mover, transmission equipment and mechanical Working load is called a…
Posted inProtection Switchgear
Protection of bus bars
The protection scheme for a power system should cover the whole system against all probable…
Posted inProtection Switchgear
Generator protection
·         The range of size of generators extends from a few hundred KVA to more than…
Posted inPower System Operation and Control
Current Transformers(CT)s and Potential Transformer(PT)
Current transformers are generally used to measure currents of high magnitude. These transformers step down…