What is kVA?

kVA stands for kilo volt-amperes or simply 1000 volt-amperes. It is basically the unit of apparent power and is the product of RMS values of voltage and current. One kVA…

Difference between fuses and circuit breakers

Short circuits and overloads are abnormal conditions that cause heavy current flow in a circuit. Heavy currents are capable of damaging a device or a circuit and may end up…

Difference between fuse and MCB

Circuit protection devices such as fuses and MCBs are used to safeguard any equipment from damages caused due to short circuits. The usage of these devices does not mitigate the…

Difference between electromechanical relays and 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?

When a circuit breaker interrupts high currents, an electric arc is generated. An electric arc is the discharge of electric current through gas or air. The conduction of electric charges…

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 colour codes – Important

Electrical engineers and electricians follow predefined wiring colour codes while wiring houses, commercial buildings and industrial panel boards. The electrical wiring colour codes followed is slightly different in every part…

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…

What is kA rating of MCB and MCCB?

kA rating of an MCB or an MCCB is the maximum current it can safely interrupt in case of a short circuit. If the current goes beyond this value, the…

Cookie Policy