MCCB – Molded Case Circuit Breaker | Working Principle | Ratings

An MCCB or Molded Case Circuit Breaker is a modular device used to protect a piece of low voltage equipment or circuit from overload and short circuits. Apart from overloads…

Surge Protection Device (SPD) | Surge protector

A surge protection device (SPD) or simply a surge protector is a device used to ensure protection against transient surges. It is used to protect the household and commercial applications…

Drawout circuit breaker positions and indications explained

Several operating indications can be seen on the front of an ACB or MCCB. Being an electrician or an engineer it is important that one must understand those indication and…

Instrument transformers – Definition, types and connection

Definition of instrument transformers Instrument transformers are current and voltage transformation devices that are used to step down the transmission and distribution line voltages and currents to levels that can…

Top 5 differences between MCB and RCCB

RCCB stands for Residual current circuit breakers and MCB stands for Miniature circuit breakers. Both of them are basic circuit protection devices found in the distribution boards of every house…

Potential transformers | Voltage transformers (PT)

Potential transformers (PT) or voltage transformers are instrument transformers used for voltage measurements. They are connected in parallel to the line and operates under the same principle of power transformers.…

Current transformers (CT)- working, types and connection

What is a current transformer? A current transformer is a type of instrument, used to measure or sense large alternating currents by scaling it to a smaller, safer and measurable…

An overview of switchgear

What is switchgear? Any mechanical switching devices used to make or break the current flow and their combination with measuring and control devices are known as switchgear. This includes circuit…

Earth Leakage Relay (ELR)

An earth leakage can represent a danger to life or property if it is not located and mitigated. Studies have revealed that at least 500 people experience electrocution every year…

Top 3 causes behind a circuit breaker trip | MCB Trip

Circuit breakers are employed to automatically switch off a circuit or a load whenever any abnormalities in current flow are detected. This functionality of the circuit breakers is known as…