Thevenin’s Theorem -explanation, equivalent circuit & examples

Circuits can contain many power sources and power dissipation elements. It is common that any one of the elements in the circuit is a variable while all others are fixed.…

Electromechanical relays vs solid-state relays

Relays are electrically operated switching devices, used to gain control over processes and circuits. Based on their principle of operation they are classified into two types: Solid-state relays and electromechanical…

Difference between earth leakage relay and earth fault relay

Earth fault is an undesirable condition at which current flow from a conductor to earth. This can happen when a current-carrying conductor falls on the ground or the body of…

What is an arc chute?

Definition of arc chute Arc chute is a set of metal plates that are arranged in parallel and mutually insulated from each other, which can divide, cool and safely extinguish…

Relay – Operation, types and applications

A relay is an electrically controlled switching device. It consists of an electromagnet and a set of contacts that open or close when voltage is applied to the electromagnet. It…

High Leg delta connection

Power is transmitted over long distances at high voltage. In order to supply domestic and residential applications, it needs to be stepped down to 120V or 230V single phase. This…

Electrical wiring color codes – Important

Electrical engineers and electricians follow predefined wiring color codes while wiring houses, commercial buildings and industrial panel boards. It is mandatory to know the electrical wiring color codes before attempting…

Difference between NO and NC

In every control circuits and automation systems, logic is developed based on the open or closed state of switches, sensors or relays. Hence it is mandatory to know the concept…

Power consumption & energy usage of electric iron

An electric iron or a steam iron or an iron box is a tool used to press the wrinkles out of your clothes so that when you dress up you…

Power consumption & Energy usage of LED lamps

The energy usage of LED lamps is much less than that of CFL lamps, fluorescent lamps or incandescent bulbs. It can produce 80-100 lumens/ watts which is almost 5 times…