What is the 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.

How many types of magnetic contactors are there?

This is the only component from which the entire load current will flow. Hence, it is a very important component of the contactor. The contacts are classified as power contact, auxiliary contact, and contact spring. There are two types of power contact; stationary contact and movable contact.

What is DC magnetic contactor?

A magnetic contactor is a device that is powered by magnetism. Used to open and close the contacts in the motor control circuit, may also be called a magnetic switch or a contactor. A magnetic contactor is a device that is very often used in industry. Commercial, large industries are very much dependent on this device.

What is magnetic contactor relay?

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 AC1 and AC3 contactor?

The difference between AC1 and AC3 contactors is AC1 contactors are used for general purpose resistive loads but AC3 contactors are used for high inductive, squirrel cage motor switching. The rating of AC3 is lower than AC1. Because AC3 switches high inrush currents.

Can I use DC contactor for AC?

If you need to use it for a long time, it is best to connect a resistor with the AC coil series. On the contrary, the DC contactor cannot be replaced by an AC contactor.

What is the difference between AC and DC contactor?

The DC contactor has a U shape, while the AC contactor has an E shape. The DC contactor has a maximum operating frequency of 1200 times per hour. In contrast, AC contactors have a maximum operating frequency of 600 times per hour. The AC contactor is designed to work at lower resistances, so they have fewer turns.

What is NC and NO in contactor?

Hence it is mandatory to know the concept behind NO/NC. 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. It is the fundamental of process automation.

How do you size a magnetic contactor?

There are 5 primary things to consider when determining how to size a contactor for your application:

  1. Full Load Amperage at Line Voltage. The first item to consider is the load, which is measured in amperes.
  2. Contactor Coil Voltage.
  3. IEC Utilization Categories.
  4. Reversing vs Non-Reversing Contactors.
  5. Auxiliary Contacts.

What is difference between AC1 and AC3 rating?

The difference between AC1 and AC3 contactors is AC1 contactors are used for general purpose resistive loads but AC3 contactors are used for high inductive, squirrel cage motor switching. The rating of AC3 is lower than AC1. Because AC3 switches high inrush currents. etc.