3-phase motor wiring diagram:

This diagram shows how to make 3 phase motor wiring diagram. In this circuit, we use a TP MCB ( Tripple Pole Miniature Circuit Breaker ), a magnetic contactor with overload, and 3 phase motor. First, we need to connect the MCB with the contactor, then connect the contactor with overload, then connect the motor with the magnetic contactor. Now this circuit is ready for use. If you want to know more about this circuit please check our youtube video below the post.


Diagram of 3-phase motor wiring:

3 phase motor wiring diagram

Components needed For this Project:

You can get the components from any of the sites below:

  1. TP MCB 20A [See Buy Click Amazon]
  2. Magnetic Contactor 40A [See Buy Click Amazon]
  3. Motor Protector Overload [See Buy Click Amazon]
  4. 3 Phase Motor (5 HP) [See Buy Click Amazon]

*Please note: These are affiliate links. I may make a commission if you buy the components through these links. I would appreciate your support in this way!

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Components used to make the 3 phase motor wiring diagram:

01. TP MCB:

The full meaning of MCB is Miniature Circuit Breaker for TP MCB. MCB is an electromagnetic switch or device. If for any reason a short circuit occurs in the supply line or load line (line to line or line to neutral) or in case of overload MCB. the MCB automatically trips and disconnects the main line circuit or household power supply Connection. TP MCB In 3 Pole MCB, Switching & Protection is affected in only 3-Phases and the Neutral is not part of the MCB. 3 pole MCB signifies the Connection of Three Wires for a 3-Phase system Red-Yellow-Blue Phase. 3-Phase Supply Only Without Neutral.

02. Magnetic Contactor:

A magnetic contactor is an electromagnetic switching device. It is generally used for controlling 3-phase Motors. The operation of a magnetic contactor is similar to that of a Relay. but a relay is used for low-power or low-voltage connections, and a magnetic contactor is used for high-power or high-voltage connections. As soon as the supply is applied to the magnetic contactor coil. its normally open contacts are closed and normally closed contacts are opened and the associated devices are also operated. This is how a magnetic contactor works.

03. Overload Relay:

Overload Protection is Protection Against a Running Overcurrent That Would Cause Overheating of The Protected Equipment. Hence, An Overload is Also a Type of Overcurrent flow. Overload Protection Typically Operates on an Inverse Time curve where the Tripping Time Becomes less as the Current Increases. This Overload Protector is an Essential Component for Many Sockets Power Systems. The Top-Quality Overload Protector can Effectively Protect Electrical Products from Power Surges.

03. 3 Phase Motor:

A 3-phase electric motor uses a 3-phase Power Supply to Convert Electric Energy into Mechanical Energy. It contains four Wires (Three hot Wires and one Neutral Wire) and Uses 3 Alternating Currents of the Same Frequency. Since it Generates a Rotating Magnetic Field, it does not need a Capacitor for the Startup. Some 3-phase Motors are Reversible, Which Means they can serve as Generators by Turning Mechanical Energy into Electrical Energy.

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Frequently asked questions

What is a basic wiring diagram?

A wiring diagram is a simple visual representation of the physical connections or physical layout of an electrical system or circuit diagram. It shows how the electrical wires are interconnected and can also show where fixtures or components may be connected to the system.

What are the 3 types of wiring?

The 3 types of wires used in household circuits are Earth wire, Live wire, or Neutral wire. Out of these, the Earth wire is used as a safety measure, especially for those appliances that have a metallic body. The color of insulation used for this wire is Green.

What is a 3-phase motor?

A 3-phase electric motor uses a three-phase power supply to convert electric energy into mechanical energy. It contains 4 wires (three hot wires and one neutral wire) and uses 3 alternating currents of the same frequency. Since it generates a rotating magnetic field and it does not need a capacitor for startup.

Are 3-phase motors AC or DC?

They are a type of AC motor that is a specific example of a polyphase motor. These motors could be either an induction motor (also called an asynchronous motor) or a synchronous motor. The motors consist of three main components – the stator, the rotor, or the enclosure.

Do 3-phase motors have 3 wires?

Three- and six-wire 3-phase motors offer versatility in their use. Most 3-phase electric motors use an internal arrangement of coils that defines them as either Wye or Delta, or this is established by the manufacturer.

Read more Single Phase Wiring


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