What are Protective Relays? | Types and Working
What is a Protective Relay? The protective relay was invented more than 160 years ago. During the last 60 years, … Continue Reading
Circuit Breaker
What is Switchgear? | Features, Components and Classification
What is Switchgear? Definition of Switchgear: The apparatus used for switching, controlling and protecting the electrical circuits and equipment is known as switchgear. … Continue Reading
Breaker Failure Relay (Back-up Protection Relay)
Each year as line and system loading increase and more operating companies superimpose higher voltage transmission systems on existing facilities, … Continue Reading
Residual Current Protective Devices (RCCB, ELCB & RCBO)
What is an RCD? A Residual Current Device (RCCB, ELCB, RCBO, GFCI etc.) is a device that is designed to … Continue Reading
Moulded Case Circuit Breaker (MCCB) – Types and Working
Moulded Case Circuit Breaker is an electromechanical device which protects a circuit from overcurrent and short circuit. It provides overcurrent … Continue Reading
Working of Air Circuit Breakers
What is an ACB? A circuit breaker in which the contacts open and close in the air at atmospheric pressure … Continue Reading
Vacuum Circuit Breaker (VCB) – Principle, Construction and Working
What is VCB? VCB stands for Vacuum Circuit Breaker. In vacuum circuit breakers, the vacuum is used as the arc quenching … Continue Reading
Parallel Operation of Single Phase Transformers
By parallel operation of single-phase transformers, we mean two or more transformers are connected to the same supply bus bars on … Continue Reading
Insulation Resistance Test (IR Test) or Megger Test
Insulation Resistance or IR Test is carried out by maintenance engineers to ensure the healthiness of the overall insulation system … Continue Reading
MCB (Miniature Circuit Breakers) – Types, Working and Trip Curves
MCB or Miniature Circuit Breaker is an electromechanical device that protects an electric circuit from an overcurrent. The overcurrent in an electrical circuit may … Continue Reading