Tag: Protection
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...
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...
What is Harmonics, Creation, Elimination in Power system
What is Harmonic in Electrical:
Harmonic in electrical is nothing but an integer multiplication of fundamental frequency. Harmonic are an unwanted distorted waveform which frequency...
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...
End Fault Protection Working Principle
End Fault Protection Working Principle:
End Fault Protection is used to protect the busbar from the fault nearer to the sensing device typically current transformer...
Stub Protection Working Function
Stub Protection Working Function:
Stub protection is nothing but a simple Phase over current protection which is used to protect the power system under ring...
CVT in Electrical Capacitive Voltage Transformer CVT
CVT in Electrical Capacitive Voltage Transformer:
CVT Capacitive Voltage Transformer is a step down transformer just like potential transformer which converts high voltage in to...
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...
SOTF Relay Working Principle – Switch On To Fault protection
Switch on to fault protection (SOTF)
Switch on to fault protection (SOTF) is used to provide high-speed tripping when energizing a power line under fault...
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...
