A contactor is an electrically-controlled switch (relay) used for switching an electrical power circuit. A contactor is typically controlled by a circuit, which has a much lower power level than the switched circuit, such as a 24-volt coil electromagnet controlling a 230-volt motor switch.
What is the purpose of a definite purpose contactor?
Specifically designed for the HVACR industry, definite purpose (DP) contactors are electrically operated switching devices. They are used for switching a power or control circuit, and are typically controlled by automatic (thermostat) control or manual (pushbutton) interfaces.
What is an electrical contact?
An electrical contact is an electrical circuit component found in electrical switches, relays, connectors and circuit breakers. Each contact is a piece of electrically conductive material, usually metal. When the contacts touch, the switch is “closed”; when the contacts are separated, the switch is “open”.
What is meant by motor starter?
The Many Types of Electric Starters. A Starter is a device that controls the use of electrical power to equipment, usually a motor. As the name implies, starters “start” motors. They can also stop them, reverse them, and protect them. Starters are made from two building blocks, Contactors and Overload Protection.