What are the two different parts of a contactor?

A contactor has three components. The contacts are the current-carrying part of the contactor. This includes power contacts, auxiliary contacts, and contact springs. The electromagnet (or "coil") provides the driving force to close the contacts.

What are the parts of a contactor?

A contactor consists of three basic parts: the operating coil, the associated magnetic circuit and the contacts that are actuated by the coil. Figure 1 is a representation of a very old type of contactor. It clearly shows the coil, the operating part of the magnetic circuit and a single contact.

What are the two main electrical parts of a relay or contactor?

What are the parts of a magnetic contactor?

A magnetic contactor has two incoming circuits which include the main circuit to power the load and an auxiliary circuit to operate the contactor itself. The auxiliary circuit connects to an induction coil, and when current flows through the circuit, the coil generates a magnetic field.

What is 13 and 14 one A1 and A2 on a contactor?

Many contactor manufacturers use the designations A1 and A2 for the terminals that connect power to the magnetic coil. Likewise, many manufacturers use the designations 13 and 14 for the terminals of normally open auxiliary contacts. Auxiliary contacts are operated by the magnetic coil just like the main contacts.

What is Contactor? | All About Contactors | Wiring Diagram

What are terminals A1 and A2 on a contactor?

A1 and A2 on a contactor typically refer to either end of the electromagnetic coil assembly. Most contactor manufacturers use A1 and A2 to designate the two terminals connecting electrical power to the contactor's magnetic coil.

What is an armature in a contactor?

The armature is the part of the contactor that actually moves when the magnetic field in the coil is energized, and the retainer springs keep these parts in place.

What are the two basic elements of a motor starter?

Contactor Construction and Operation. A magnetic motor starter has two basic parts: the magnetic contactor and an overload relay .

What are the parts of a relay?

A relay is nothing but a simple electrical device consisting of eight small parts; a pair of fixed contacts, one movable contact, armature, yoke, electromagnet, control switch, and spring.

What are three main parts of a relay?

Frame: Heavy-duty frame that contains and supports the parts of the relay. Coil: Wire is wound around a metal core. The coil of wire causes an electromagnetic field. Armature: A relays moving part.

What is a contactor and each function?

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.

What is Terminal Bar in contactor?

The terminal bar is a connection point at the input, output, or an intermediate point of a device, or a point at which a voltage is to be applied.

What is the difference between relay and magnetic contactor?

Contactor vs Relay Applications

Contactors are typically built for and used in 3-phase applications where a relay is more commonly used in single phase applications. 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.

How do you connect a contactor?

Break your circuit, L N E through your contactor. Link a permanent live and a neutral from your supply to your coil (Al + A2) then use your switch feed to your photocell from A1, and switch the wire to the switched phase of your contactor load. This should now open when light, close when dark.

What is the difference between a starter and a contactor?

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 starter components?

How does a 3 phase contactor work?

A three-phase contactor is an electronic device used to turn power on or off at a three-phase load. These devices are used when the voltage requirements of the load exceed the power-handling capability of a mechanical relay.

What is contactor coil?

The contactor coil is an electrical passive device that has two terminals. When a control voltage is applied to its A1-A2 terminals it enables the main contacts of a contactor to change their position.

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.

What is relay armature?

Armature– is a basic metal piece that is balanced on a pivot or a stand. It is considered the moving 'arm' of the relay. It makes or breaks the connection with the contacts connected to it. Spring– is connected to one end of the armature and pushes the armature back into place if no current is passing through.

Which side of contactor is common?

Different Types of Contactors - Single Pole, Double Pole, 3 Pole. A single pole contactor only has to connect one wire for power. The other leg is just the neutral/common and is always in the circuit.

Does a contactor need a neutral?

You still need a neutral going to the load. We need both hot and neutral at the coil side of the relay to make the coil pull in to make the contact.

What is L1 and L2 on a wiring diagram?

The incoming circuit wires that provide the power are referred to as the line wires. L1 (line 1) is a red wire and L2 (line 2) is a black wire. Together, they show the motor voltage. Having both an L1 and L2 indicate that the motor voltage may be 240 volts.