Contactors are classified into AC contactors (voltage AC) and DC contactors (voltage DC), and they are applied in power, distribution and consumption. In a broad sense, a contactor refers to an electrical device in industrial electricity that uses the current flowing through a coil to generate a magnetic field, causing the contacts to close to control the load. In electrical engineering, because it can quickly cut off the main AC and DC circuits and
The contactor is a device that can frequently connect to circuits with high current control (up to 800 amperes for some types), so it is often used as the control object for electric motors. It can also be used to control factory equipment, electric heaters, machine tools and various power units and other power loads. The contactor can not only connect and disconnect circuits, but also has a low-voltage release protection function. The contactor has a large control capacity and is suitable for frequent operation and remote control. It is one of the important components in the automatic control system.
In industrial electrical systems, there are many types of contactors, with currents ranging from 5A to 1000A, and they are widely used.