It provides a path way for electrical wiring

Install the high powered circuit accessories

Mounting the double deck terminal connectors

Mounting the control accessories without screws

Timer

Relays

Contactor

Control transformer

Resistive loads except motor loa

Starting and stopping of shunt motor

Starting and stopping of series motor

Starting and stopping with inching and braking

To maintain constant terminal voltage

To supply the power to the auxiliary circuits

To control the supply voltage to the contactor

To protect the control elements from over voltage fault

By manual operation

By mechanical settings

By operating electromagnet to change the position

By using bimetallic strip to change the position