Arshad

C.T

C.T – Current Transformer It is the transformer uses for current measurement.

D.T.R – Distribution Transformer A transformer that provides the final voltage transformation in the electric power distribution system, stepping down the voltage used in the distribution lines to the level used by the customer.

R.C.B

Residual circuit breaker A device that quickly breaks an electrical circuit to prevent serious harm from an ongoing electric shock.

R.C.D

Residual-Current Device A device that quickly breaks an electrical circuit to prevent serious harm from an ongoing electric shock.

Relay

Relay control one Electrical circuit by opening and closing contacts in another circuit.

Protective Relay

A protective relay is a relay device designed to trip a circuit breaker when fault is detected.

Types of Protection relay

Relays depend on the function for which they are used. Some of the categories include protective,reclosing,regulating,and monitoring relays.

Power Factor

It is the ratio of active power to apparent power,power Factor is denoted by cos(PHI)

P.L.C

Programmable Logic Controller (PLC) Control Panels are also known as PLC automation panel are one of the most important and efficient kinds of control panels.It is generally used in variety of Electronic and Electrical circuit fittings.

A.T.S

Automatic Transfer Switch It is a device that automatically transfers a power supply from its primary source to a backup source when it senses failure primary source