What is contactor and how it works?

What is contactor and how it works?

A contactor is an electromechanical switch whose function is to make or break the connection between the power supply and the load. The contactor is electrically controlled and usually powered at a much lower level than the switched circuit.

What is the function of electromagnetic contactor?

A contactor is an electrically-controlled switch used for switching an electrical power circuit. 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.

How does a magnetic starter work?

Magnetic starters rely on electromagnets to function. They have an electromagnetically operated set of contacts that starts and stops the attached motor load, and an overload relay. The overload relay opens the control voltage to the starter coil if it detects an overload on a motor.

What is the advantage of contactor?

Advantages of contactors include: Protection. Simple Operation. High-load capacity.

What is the difference between a contactor and a magnetic starter?

A contactor applies voltage to a contactor coil to close the contacts and to supply and interrupt power to the circuit. On the other hand, a starter employs overload relays to protect the motor from load surges by shutting it down to prevent overheating.

What are the advantages of magnetic contactor over a manual switch?

1) Magnetic control permits installation of power contacts close to motor whereas the actuating control device i.e., a push button switch could be located away from the motor in a position most convenient to the operator.

What is the best magnetic conductor?

Some of the best metallic conductors are copper (Cu), silver (Ag), and gold (Au). (2) There are some conductors that are not metals. Carbon is the best example.

Where are contactors used?

A contactor is a special type of relay used for switching an electrical circuit on or off. They are most commonly used with electric motors and lighting applications.

What is the function of a magnetic contactor used in protection system?

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 the difference between a relay and a magnetic contactor?

A contactor joins 2 poles together, without a common circuit between them, while a relay has a common contact that connects to a neutral position. Additionally, contactors are commonly rated for up to 1000V, while relays are usually rated to only 250V.

Which of the following are advantages of magnetic contactors?

Advantages of Magnetic Contactors

  • Provides high safety for operators.
  • Provide ease of control.
  • Economical compared to manual controls.
  • Controllable with an automatic device or a remote-control operation is possible.