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Directional Over Current Relay Explanation

Directional Over Current & Non Directional Over Current Protection Working Principle

Directional Over Current & Non Directional Over Current Protection Working Principle: Directional Earth Fault Relay is used to protect the transformer/generator/alternator from over current fault....
UAT differential protection

Unit Auxiliary Transformer (UAT) Differential Protection 87UAT

Unit Auxiliary Transformer (UAT) Differential Protection: Unit Auxiliary Transformer (UAT) differential protection is used to protect the generator and transformer’s winding internal short circuit, inter...
Dead Machine Protection

Dead Machine Protection Working Principle – 94G ANSI Code

Dead machine Protection Working Principle -94G ANSI Code Dead machine protection is used to protect the generator or alternator from accidental circuit breaker closing when...
Generator and Transformer Unit Biased Differential Protection

Generator and Transformer Unit Biased Differential Protection

Generator and Transformer Unit Biased Differential Protection: In a high voltage transmission system, the bus bars are at very high voltages than the generators. The...
Loss of field protection

Loss of Excitation Protection Working Principle – 40

Loss of Field or Loss of Excitation Protection: Loss of excitation protection is used to protect the synchronous machine (alternator or generator) acts as induction...
Pole Discrepancy Protection

Pole Discrepancy Protection Working Principle – 52 PD

Pole Discrepancy Protection Working Principle: Pole discrepancy protection is used to protect the generator/alternator from single phasing when the circuit breaker is failured to close...
Under Voltage protection

Under Voltage Protection Working Principle 27

Under Voltage Protection Working Principle 27: Under voltage fault protection is used to protect the alternator/generator/transformer winding from low voltage operation. Under voltage protection sense...
What is Reverse Power protection

Reverse Power Protection Working Principle -32R

Reverse Power Protection Working Principle 32R: Reverse power protection is the most Predominate protection in generator/alternator protection. It is used to protect the alternator/generator from...
Negative sequence relay

Negative Sequence Relay Operation 59_2

Negative Sequence Relay: Negative Sequence Relay is used to protect the alternator/generator from unbalance loading and negative sequence component. The negative sequence current flows in...
stator earth fault relay 59GN 27TN

100% Stator Earth Fault Protection of Generator

100% stator Earth Fault protection: Stator is a stationary winding of generator. It is a heart of the generator. To protect the stator, we have...