Tag: generator
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....
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 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:
In a high voltage transmission system, the bus bars are at very high voltages than the generators. The...
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 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 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...
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 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...
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...
Neutral Voltage Protection -59GN- 95% stator Earth fault protection
Neutral Voltage Protection -59GN:
Neutral Voltage Protection is used to protect the alternator/generator stator winding from stator earth fault. Most commonly, the generator’s neutral point...
Advantage of Neutral Grounding Transformer NGT
Advantage of Neutral Grounding Transformer NGT?
Neutral grounding transformers are a single phase transformer which is used to protect the generator/alternator winding from damaging short...
Over Frequency Protection Working Principle -81O
Over Frequency Protection:
Over frequency protection or over speed protection is used to protect the generator from over speeding of generator’s rotor, reduce the eddy...
Local Breaker Backup Protection LBB 50Z or 50BF
Local Breaker Backup Protection LBB 50Z or 50BF:
Local Breaker Backup Protection is used to protect the generator when the generator’s circuit breaker failed to...
Low Forward Power Protection 32F
Low Forward Power Protection 32F:
Low forward Power protection occurs when the generator is not able to produce the minimum output power. Typically, the generator...
Generator Over Fluxing or Over Excitation Protection 24 G
Over Fluxing or Over Excitation Protection 24 G.
Over Fluxing relay is used to protect the generator against overheating and the winding insulation failure. Over...
Pole Slip Protection Out of Step Protection 78PS Working Principle
Pole Slip protection or out of step Protection 78PS:
Pole Slip protection: Under normal condition the generator is synchronized with grid. But during some extreme...