Protection Switchgear 5 min read
SF6 circuit breaker
At this point we are aware that the medium in which arc extinction of the circuit breaker takes place greatly…
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Protection Switchgear 3 min read
Oil circuit breakers
Types Of Oil Circuit Breakers Oil circuit breakers can be classified into following types: 1) Bulk oil circuit breakers which…
Protection Switchgear 6 min read
Air blast circuit breaker
This type of circuit breakers, is those kind of circuit breaker which operates in air at atmospheric pressure. After development…
Protection Switchgear 7 min read
Rating of Circuit Breaker
The rating of a circuit breaker includes, 1) Rated short circuit breaking current. 2) Rated short circuit making current. 3) Rated operating sequence of circuit…
Protection Switchgear 3 min read
current chopping
Current chopping is a term that came to our vocabulary with the advent of vacuum switching which was commercially started…
Protection Switchgear 3 min read
Resistance switching
To reduce the restriking voltage, RRRV and severity of the transient oscillations, a resistance is connected across the contacts of…
Protection Switchgear 2 min read
Rate of rise of recovery voltage
It is the rate of increase of restriking voltage and is abbreviated by R.R.R.V. its unit is kV/m sec.Consider the…
Protection Switchgear 1 min read
Restriking voltage and recovery voltage
It is the transient voltage that appears across the contacts at or near current zero during arcing period.If dielectric strength…
Protection Switchgear 8 min read
Formation of arc during circuit breaking
The phenomena of Arc During opening of current carrying contacts in a circuit breaker the medium in between opening contacts…
Transmission and distribution 2 min read
Long distance power transmission
The electric power generated in a power station situated in a remote place is transmitted to different regions for domestic…
Basics 3 min read
Block Diagram of an Electrical Drives
Drive: A combination of prime mover, transmission equipment and mechanical Working load is called a drive Electric drive: An Electric…
Protection Switchgear 2 min read
Protection of bus bars
The protection scheme for a power system should cover the whole system against all probable types of faults. Unrestricted forms…
