Contactor
Electrical Contactors for Sale
The electric contactor is an essential component of a power system. It’s a large relay that switches loads on and off in electric motors, transformers, or other high-power equipment quickly to meet the demand for energy production during peak times when it’s needed most.
Electrical contactors control the flow of electricity between two conductors. Its motor control is used to switch electrical circuits on and off, and to protect against electrical overloads. They consist of two main parts: the switch itself, and the control coil. The switch is typically made of metal, and the control coil is wound around a metal core. The contactor works by using the magnetic field generated by the control coil to open and close the switch. When the control coil is energized, the magnetic field pulls the switch closed, and when the control coil is de-energized, the magnetic field releases the switch, allowing it to open.
Types of contactors
Disconnect Switch
The Knife Blade Switch was one of the first electrical contactors used in electric motors. The switch makes, breaks, or changes the path of electric circuits that can be operated by hand by pulling and pushing the switch up and down.
Knife switches are broken down into single-pole, double-pole, triple-pole, and multipole types based on how many contacts they have. To increase the amount of power that can be cut off, high-power knife switches have arc-quenching chambers.
However, the manual opening and closing of the current leads to faster corrosion of the switch, which makes it more difficult to avoid an arc. With the risks of dangerous operation and the short life of the contacts, this switch has largely been replaced by manual and magnetic contactors.
Manual Contactor
With a manual contactor, you can work with more current in smaller spaces. However, the most important feature of a manual contactor is its ability to handle large amounts of current while still remaining safe to operate. This makes it ideal for use in industrial applications, where large amounts of power are required.
Once the manual controller is initiated by an operator, the power circuit is activated. When triggered, it transmits power to the load. Since the double break contacts divide the connection, it creates two sets of metal rings that make an electric spark when they meet each other. The only drawback to this switch is that it cannot be controlled remotely or wirelessly, and would have to be turned on and off manually.
Magnetic Contactor
A magnetic contactor is an electromagnetic device that is used for switching an electrical power circuit. It consists of a coil that is wrapped around an iron core and has a set of contacts that are used to complete or open the circuit. The magnetic force generated by the coil helps to keep the contacts remain in a closed position. When the magnetic force is removed, the contacts open up and break the circuit.
Magnetic contactors are very reliable and can be used for long periods without failing. They are used in a variety of applications and are especially common as motor contactors where high currents need to be switched. They can handle large amounts of current because of the magnetic field that is created when the coil is energized.