What's a Change over Switch?

A transfer switch is an electrical switch that switches a load between two sources. Some transfer switches are manual, in that an operator effects the transfer by throwing a switch, while others are automatic and trigger when they sense one of the sources has lost or gained power.

What does a change over switch do?

A pressure switch with the “change-over” switching function represents a special version of a pressure switch with two switching outputs acting oppositely to switch two circuits. A “change-over” closes one circuit and simultaneously opens a second circuit.

What does changeover contact mean?

A changeover contact is part of a relay on which the normally open contact can break or make contact. A relay can contain several changeover contacts.