Tag: relay
Merz Price Differential Protection for Transformer Explanation
Merz Price Differential Protection for Transformer:
Merz price differential protection is used to protect the transformer from internal short circuit, Internal ground faults and inter...
How to Calculate Stabilizing Resistor for High Impedance Differential Protection
Calculate stabilizing resistor for Differential Protection:
In a three-phase alternating power system, the bus bar differential protection needs to be stabilized, because the differential relay...
Standby Earth Fault Relay 51N, Operation, Construction
What is Standby Earth Fault Relay:
A Standby earth fault relay is nothing but an earth fault protection used to protect the generator, transformer, and...
Plug Setting Multiplier & Time Setting Multiplier
Plug Setting Multiplier & Time setting Multiplier Calculation:
Plug setting multiplier is nothing but a ratio between the actual fault current in the relay operating...
Difference Between IDMT DT and Instantaneous Relays
Difference between IDMT DT and Instantaneous relays:
Generally, the over current relays are differentiating with their time of operation. The most commonly used over current...
Partial Differential Protection | Scheme | Working Principle
What is Partial Differential Protection:
Partial differential protection is used to protect the bus bar from over loading, provide the backup protection for main bus...
Vector Surge Relay Working Principle | Main Decoupling Relay | MRN Relay
Vector Surge Relay Working Principle:
Vector surge relay is used to protect the transformer/generator/alternator from grid disturbance such as grid failure, grid interruption, vector surge...
Motor Protection Relay MPR Relay Working Principle Higher HP & High Voltage Motor
Motor Protection Relay MPR Relay Working Principle:
Motor Protection relays are used to protect the higher HP high voltage induction motor. When we increase the...
Difference Between Inter Turn Short And Internal Short
Difference between inter turn short and internal short?
Electrical machine consists of copper winding and they will be insulated and wound in a core. The...
Single Phase Preventer Working Principle | Induction Motor Protection
Single Phase Preventer Working Principle:
Single phase preventer is used to protect the induction motor from single phasing fault. Single phasing is a very dangerous...
Current Based Relay | Voltage Based Relay
Current based relay | Voltage based relay:
Current based relay:
Current based relay is nothing but an operating element or relay coil is designed to operate...
Phase Reversal Protection | Induction Motor Protection
Phase Reversal Protection | Induction Motor Protection:
Phase reversal protection is used to protect the induction motor, from running in reverse direction. Normally running a...
Phase Fault Protection | Induction Motor Protection
Phase Fault Protection | Induction Motor protection
Phase fault protection is nothing but an attracted armature type relay unit is connected in each phase current...
ELCB Earth Leakage Circuit Breaker Working Principle
ELCB Earth Leakage Circuit Breaker| Ground Fault Protection on Induction Motor:
The ground fault protection is used to protect the induction motor from ground fault...
Difference between Surge Arrester, Lightning Arrester and Lightning Rod
Difference between Surge Arrester, Lightning Arrester and Lightning Rod:
Surge arrester is used to protect the circuit or electrical equipment from high voltage transient or...
Check Synchronous Relay Working Principle SKE Relay ANSI Code 25
Check Synchronous Relay Working Principle:
Check Synchronous Relay is used to protect the generator from mismatched synchronization. Mismatched synchronous leads to flow heavy circulating current...
Distance Protection Working Principle & Fault Location Detection
Distance Protection Relays Working Principle:
In last study we have discussed about only current or voltage based relay. Now we are going to discuss about...
Busbar Protection & Frame Leakage Protection Working Principle
Bus bar Protection:
The busbars are an important power distribution part in the power system. They are built inside of the panel with safe condition....
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...
Rate Of Change Of Frequency (ROCOF) Protection df/dt Working Principle
Rate Of Change Of Frequency (ROCOF) Protection df/dt working Principle:
Rate Of Change Of Protection is used for load shedding in situations where sudden loss...
