Electromagnetic contactors are a device that can be used on most three-phase asynchronous electric motors, as it is used to start and stop them, more about contactors of other electrical products at https://polykor.com.ua/shop/493-avtomatika-i-upravlenie/250-puskateli -i-kontaktory-dopolnitelnye-ustroystva /260-kontaktory
Automation devices such as contactors and starters are widely used, which are necessary to start and stop an electric motor. It should be noted that the contactor is necessary for switching any AC power circuit, and electromagnetic contactors are not automatic switches. They do not disconnect the connection between the instrument and the power supply during a short circuit. They are disconnected from the engine so that the operator can work with this engine; disassemble, without danger of exposure to current still passing through the device.
Design Features
The external view of the electromagnetic contactor is a box-shaped element of a square or rectangular shape. Depending on the electrical device it attaches to, it can be quite small. They are made of heat-resistant, non-conductive plastic such as Bakelite and have two metal contacts that fit into the contacts of their main device. Inside, one contact goes to a small electromagnetic coil. Another contact goes to the iron core, which remains separated from the coil.
Contactor function
When electricity flows through an electromagnetic contactor, it causes the electromagnet to generate a strong magnetic field. This is the field and the iron core of the coil and creates an electric arc. The electricity thus flows through one contact and into the motherboard of the contactor. To deactivate, the contactor can be physically pulled out of the main unit. In addition, in the absence of electric current, the spring pushes the core away from the coil, breaking the connection.
