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…

Selection and sizing of transformers – made easy

A transformer is the device that makes power systems flexible, scalable and help save cost by reducing power loss. Here you can learn the selection and sizing of transformers and…

Autotransformer – Principle, advantages, copper savings

An autotransformer is a single-winding electrical transformer. It is also known as variac or dimmer stat. It is made of a single-winding coil. This single-winding setup makes them cheaper, more…

Parts of a transformer

The transformer facilitates the delivery of power electric energy at minimum power loss. The basic parts of a transformer are the core, the primary winding, and the secondary winding. Apart…

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…

K-factor rated transformers

What are K-factor rated transformers? K-factor rated transformers are capable of withstanding the heating effects caused by harmonic load currents. They are specially designed for non-linear harmonics generating loads. It…

What is magnetization current in a transformer?

A certain amount of current is drawn by a transformer from the source connected to it primary even when no load is connected to its secondary. A part of this…

Magnetization inrush current in a transformer

Transformer inrush current or magnetization inrush current is a transient input current drawn by a transformer during its energization. Depending on several factors, the magnitude of the magnetization inrush current…

Power consumption & Energy usage of CFL lamps

CFL lamps or compact fluorescent lights are made to make lighting more energy efficient. It started replacing the incandescent lights. It was invented by Edward Hammer in1980 who was an…