Calculation of Cable Capacitance

Cable capacitance is the formation of capacitance between the charged core or conductor and the earthed lead sheath. Therefore it is quite important to have an idea of how the cable capacitance varies or the factors affecting its value. Calculation of Cable Capacitance A single...
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Current Chopping in Circuit Breaker

What is Current Chopping? Current Chopping in circuit breaker is defined as a phenomena in which current is forcibly interrupted before the natural current zero. Current Chopping is mainly observed in Vacuum Circuit Breaker and Air Blast Circuit Breaker. There is no such phenomena in...
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Resistance Switching in Circuit Breaker

Resistance Switching in Circuit Breaker refers to a method adopted for dampening the over voltage transients due to current chopping, capacitive current breaking etc. In this method, a shunt resistance is connected across the contacts of circuit breaker. How does Resistance Switching Work? Let us...
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Critical Disruptive Voltage

What is Critical Disruptive Voltage? Critical Disruptive Voltage is defined as the minimum phase to neutral voltage required for the Corona discharge to start. Basically corona discharge is the current discharge in the air. Therefore it is quite obvious that surrounding air shall breakdown for...
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