For fixing relays

For fixing contactors

For fixing instruments

For fixing terminal connectors

Controls machine from over heat

Controls machine from over speed

Controls machine from over loading

Controls distance movement of any machine

AC₁

AC₂

AC₃

AC₄

Main-Star-Delta-Timer

Star- Main-Timer-Delta

Main-Timer-Delta-Star

Star-Timer-Main-Delta

To maintain rated voltage to load

To operate the auxiliary circuits

To maintain rated main supply voltage

To supply reduced voltage to power circuit