Kontaktori

Kontaktori, also known as a motor starter or a power contactor, is an electrically controlled switch used for switching a power circuit, similar to a relay, but with a higher capacity to handle the electric current. Contactors are typically used to control electric motors, lighting, heating, capacitor banks, and other electrical loads. They are designed to be operated very frequently, making them suitable for applications where a device is switched on and off repeatedly.

The basic construction of a contactor involves an electromagnet that operates a set of contacts. When the coil of the electromagnet is energized, it creates a magnetic field that pulls a movable armature, causing the contacts to close. This closes the main circuit, allowing current to flow to the load. When the coil is de-energized, a spring returns the armature to its original position, opening the contacts and interrupting the circuit.

Contactors are essential components in industrial automation and power distribution systems. They offer a safe and reliable way to control high-power circuits remotely or automatically. Their ability to interrupt fault currents and their robust design make them a preferred choice for demanding applications. They are often used in conjunction with overload relays to protect motors from damage due to overcurrent conditions. The size and rating of a contactor are determined by the voltage and current requirements of the load it is intended to control.