Tag: relay
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 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 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...
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- 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 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,...
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...