What is magnetic contactor and how it works?

What is magnetic contactor and how it works?

Magnetic contactors are a form of electrical relay found on most electrically powered motors. They act as a go-between for direct power sources, and high-load electrical motors in order to homogenize or balance out changes in electrical frequency which may come from a power supply as well as to act as a safeguard.

What is contactor diagram?

In simple words, Electrical Contactor is an electrically operated switch whose main function is to connect or disconnect the load from the power source. Basically, the contactor work as a medium when we control a high voltage, high current power circuit by a low voltage, low current control circuit.

What are the parts of magnetic contactor?

A contactor consists of three basic parts: the operating coil, the associated magnetic circuit and the contacts that are actuated by the coil.

What are the three parts of the contactor?

There are three major parts of a contactor or relay: the coil, mechanical linkage and contacts. The coil is used to create a magnetic field and is rated based on voltage (24 V, 120 V, 208/204 V, 480 V). The mechanical linkage connects the armature to the contacts when the coil is energized, completing the circuit.

What is the main purpose of magnetic contactor?

Magnetic contactors are used in the electric motors to balance the change in frequency of the motor or the state of the motor which can be termed as the switching of the motor from ON and OFF state.

What is the main function of contactor?

A contactor is an electrical device which is used for switching an electrical circuit on or off. It is considered to be a special type of relay.

What is NO and NC In contactor?

In every control circuits and automation systems, logic is developed based on the open or closed state of switches, sensors or relays. Normally open(NO) and Normally closed (NC) are terms used to define the states of switches, sensors or relay contacts under when its coil is not excited.

What are the two basic types of contactors?

There are different types of contacts in a contactor, and they are; auxiliary contact, power contact, and contact spring. The power contact has two types that are; stationary and movable contact.

What’s the difference between relay and contactor?

Control Relay: It is a device through which contacts in one circuit are operated by an alteration in conditions in the same circuit or in associated circuits. Contactor: It is a device which is used for repeatedly establishing and interrupting an electric circuit under normal conditions.

What does NC mean on a contactor?

NC means normally-closed contact. NO means normally-open contact. When the relay coil is de-energized, NC contact becomes open, and NO contact closes.

How contactor is connected?

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. Unlike general-purpose relays, contactors are designed to be directly connected to high-current load devices.

What is difference between relay and contactor?

Relays are used to control contacts of an electrical circuit due to a change of parameters or conditions in the same circuit or any other associated circuit. Contactors, on the other hand, are used to interrupt or establish connections in an electrical circuit repeatedly under different conditions.