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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...

Lockout Relay Working Function 86

Lockout Relay Working Function 86: Lockout relays are nothing but a manual reset relays, which ensure the fault has been cleared or inspected correctly. Lockout...
Under frequency protection

Under Frequency Protection Working Principle – 87U

Under Frequency Protection Working Principle: Under Frequency Protection is used to protect the transformer/generator/alternator when the frequency drops below the operating frequency. It is a...
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...
Netural overvoltage protection

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...
Neutral displacement relay operation

Neutral Displacement Relay Operation- 59N

Neutral displacement relay: Neutral Displacement relay is a short form of NDR. Neutral displacement relay is used to protect the transformer against earth fault in...
voltage restrained over current relay concept

Voltage Restrained Over Current relay Basic concept -51VR VOC

Voltage restrained Over Current relays: The overcurrent relay is nothing but a relay operates when the current reaches the pickup value. The overcurrent relay is...

Protective Relaying Terminologies Definition

Protective Relaying Terminologies Definition: The various terminologies used in the protective relaying are, Protective Relay Relay Time Breaker Time Pickup Pickup Value Dropout or Reset ...

Zone of Protection System

Zone of Protection System: All the electrical power system works under zone protection and which can be divided in to several zones of protection. Each...

What is Fault in Electrical, Types, Symmetrical & Unsymmetrical Fault

What is Fault in the Electrical power system: In an electric power system, a fault or fault current is nothing but any abnormal electric current...

High Impedance Differential Protection Low Impedance Differential Protection

What is high impedance differential protection and Low Impedance differential protection: Generally, you can configure your differential protection in two ways, according to the connection,...
Moving Contact

How To Make A Electrical Starter and Power Circuit

Power circuit: Power circuit is nothing but, distribution of power to the motor through a certain equipment like MCCB/MPCB/SFU, contactor, protection relay, Power cable, Connector...