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Relay Timing Circuit

Relay Timing Circuit: An important characteristic of a relay is its time of operation. By the Relay Timing Circuit of operation is meant length of the time from the instant…

Electromagnetic Attraction Relay – Working Principle and its types

Electromagnetic Attraction Relay - Working Principle and its types: Electromagnetic attraction relay operate by virtue of an armature being attracted to the poles of an electromagnet or a plunger being…

Protective Relay

Protective Relay: A Protective Relay is a device that detects the fault and initiates the operation of the circuit breaker to isolate the defective element from the rest of the…

Switchgear Components in Circuit Breakers

Switchgear Components in Circuit Breakers: The following are some important components common to Switchgear Components in Circuit Breakers : Bushings Circuit breaker contacts Instrument transformers Bus-bars and conductors 1. Bushings: When…

Circuit Breakers Definition

Circuit Breakers Definition: A circuit breaker can make or break a circuit either manually or automatically under all conditions viz., no-load, full-load and short-circuit conditions. This characteristic of the Circuit…

Short Circuit kVA

Short Circuit kVA: Although the potential at the point of fault is zero, it is a normal practice to express the short-circuit current in terms of Short Circuit kVA based…

Switchgear Equipments

Switchgear Equipments: Switchgear covers a wide range of equipment concerned with switching and interrupting currents under both normal and abnormal conditions. It includes switches; fuses, circuit breakers, relays and other…

Tap Changing Auto Transformer

Tap Changing Auto Transformer: Fig. 15.6 shows diagrammatically Tap Changing Auto Transformer. Here, a mid-tapped auto-transformer or reactor is used. One of the lines is connected to its mid-tapping. One…