Crompton MVC 400 110 VAC 3 Pole with Coil Controller

A “Vacuum Contactor” is a ‘switching device” which “makes and breaks” the current in a chamber known as the ‘Vacuum Interrupter Tube” (VI). A breaking arc is established between the fixed and moving contacts of the VI. At current zero the arc is extinguished and the circuit voltage is isolated internally by the rapid build up of dielectric strength between the fixed and moving contacts. The special contact material used in the VI ensures low chopping current and switching over voltage thereby enhancing the life of the connected load (viz. motors, transformers, capacitors etc).