How does a magnetic contactor work?
Function. When electricity flows through the magnetic contactor, it causes the electromagnet to generate a strong magnetic field. This field pulls the iron core into the coil, and creates an electrical arc. Electricity passes in through one contact and into the contactor’s parent device in this manner.
How do you connect a relay to a contactor?
Contactor Connection Procedure
- Generally the magnetic coil of a contactor is designed to operate at a low voltage such as 230V AC, 110V AC, 24V DC, etc.
- Connect the main power supply terminal with the incoming terminals of the contactor.
- Connect the load with the outgoing terminals of the contactor.
What does A1 and A2 mean on a contactor?
One side of the contactor coil (A2) is connected directly to one of the incoming power lines. The other side of the coil (A1) has two possible pathways to complete a connection to the other incoming power line.
Does contactor coil polarity matter?
A common question about solenoid valve coils is whether the electrical current polarity matters in a DC coil. The answer is that polarity does not matter. You can connect the positive terminal to either of the two wires without affecting the operation of the valve.
How do you wire a contactor with a 120v coil?
Attach the wire coming from the 120 VAC electrical supply to the top screw terminal on the switch. Secure another wire to the second screw terminal on the switch. Attach the other end of that wire, to one of the screw terminals on the 120 VAC coil located on the contactor.
How do you test a magnetic contactor?
To test a contactor with a multimeter or voltmeter, use the following steps as a guide.
- Remove wires from the line.
- Remove wires from the terminal.
- Turn on the control switch.
- Connect the multimeter.
- Test each line.
- Check for a faulty coil connection.
- Check voltage.
- Check ohms.
What is the purpose of using magnetic contactor?
Magnetic contactors are the same as the electrical relays which are used in a number of electric motors. 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 difference between a contactor and a relay?
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.
What does T stand for on a contactor?
With “L” 1,2,3, the L = “Line”, meaning the incoming supply line. For the load side, “L” already had a different meaning, so the the label is T 1,2,3, with “T” = Terminus, meaning the exit point, ie going to the last thing connected in the circuit.
What’s the difference between a relay and a contactor?
What does a contactor wiring diagram look like?
What Is A Contactor. Contactor Wiring – Contactor Wiring Diagram Wiring Diagram includes numerous in depth illustrations that present the relationship of varied products. It includes guidelines and diagrams for different types of wiring techniques along with other things like lights, home windows, etc.
What are the parts of a magnetic contactor?
Magnetic contactor has three parts. 1.power coil, 2.Auxiliary coil, 3.Spring mechanism. The power coil carry high current and auxiliary contactor receives signal to make the contactor open or close or send the status of the contactor (on or off) to external systems like PLC, SCDA.
What makes a magnetic contactor a swithing device?
Magnetic Contactor is an electromagnetically powered swithing device, which functions much like a reel. However, the relay is usually used at low power and voltage while on the other hand, Magnetic contactor is used for high power.
What kind of power does a contactor use?
Contactors use 120 volt standard power to energize a magnetic coil which causes a set of internal contacts to close and provide higher power to the equipment.