vacuum circuit breaker Archives - Electrical Concepts

Vacuum Circuit Breaker- Construction and Working

April 20, 2018November 9, 2017 by admin

Vacuum Circuit Breaker Vacuum Circuit Breaker (VCB) is one where vacuum of the order of 10-6 to 10-10 torr is used as an arc quenching medium. 1 torr is equivalent to a pressure represented by a barometric head of 1 mm mercury. Vacuum Circuit Breaker is used for low and medium voltage applications. Construction of … Read more

Concept of Subtransient, Transient & Steady State

April 25, 2018October 11, 2016 by admin

The concept of Subtransient, Transient and Steady State arises in case of fault in an Alternator. Let us assume a sudden short circuit in three phase of alternator. The fault current will flow in all the three phases of alternator and its waveform will be as shown in figure below. When the alternator is short-circuited, … Read more