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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…

Sequence Networks Unsymmetrical Faults

Sequence Networks Unsymmetrical Faults: The analysis of an unsymmetrical fault by symmetrical components method can be conveniently done by drawing sequence networks. A Sequence Networks Unsymmetrical Faults of a particular…

Sequence Impedance of Power System

Sequence Impedance of Power System: Each element of power system will offer impedance to different phase sequence components of current which may not be the same. For example, the impedance…

Location of Reactors in Power System

Location of Reactors in Power System: Short circuit current limiting Location of Reactors in Power System may be connected in series with each generator in series with each feeder and…

Percentage Reactance in Power System

Percentage Reactance in Power System: The Percentage Reactance in Power System of generators, transformers, reactors etc. is usually expressed in percentage reactance to permit rapid short circuit calculations. The percentage…

Short Circuit in Power System

Short Circuit in Power System: Whenever a fault occurs on a network such that a large current flows in one or more phases, a Short Circuit in Power System is…

Bus Bar Arrangement in Power Station

Bus Bar Arrangement in Power Station: When a number of generators or feeders operating at the same voltage have to be directly connected electrically, bus-bars are used as the common…

Induction Regulators

Induction Regulators: An induction regulators is essentially a constant voltage transformer, one winding of which can be moved w.r.t. the other, thereby obtaining a variable secondary voltage. The primary winding is…