Square D QO Circuit Breakers
QO stands for Qwik-Open. Square D QO Circuit Breakers are fastest tripping circuit breakers at 1/60th of a second. QO™ … Continue Reading
Circuit Breaker
Circuit Breaker Definition, Working Principle and Arcing Phenomenon
Definition A circuit breaker means the device which breaks (Open) the circuit under the abnormal condition and protects the system from … Continue Reading
Current Transformer (CT) – Construction and Working Principle
A current transformer (CT) is a type of transformer that is used to measure AC current. It produces an alternating current … Continue Reading
What are Motor Control Centres?
The Motor Control Centre is used in general to describe combinations of enclosures, busbars, circuit breakers, power contactors, power fuses, … Continue Reading
Introduction to Gas Insulated Substations / Switchgears (GIS)
Gas-insulated substations (GIS) have been used in power systems over the last three decades because of their high reliability, easy … Continue Reading
Low Voltage Switchgear
Low voltage switchgear, according to IEC 60947, refers to switchgears with rated voltages up to 1000 V AC and 1500 … Continue Reading
What is a FUSE and How it Works?
A fuse protects an electrical circuit or device from excessive current when a metal element inside it melts to create an … Continue Reading
Substation Earthing System Design
We have already given an introduction to substation earthing system in an article published earlier. Today we are going to … Continue Reading
Solid State Relays (Static Relays)
What is a Static Relay? There are two basic classifications of relays – Electromechanical Relays and Solid State Relays (Static … Continue Reading
All Day Efficiency of Transformer
Definition The ratio of output in kWh to the input in kWh of a transformer over a 24-hour period is … Continue Reading