3-Phase Contactor wiring with timer:

This diagram shows how to make 3 Phase Contactor wiring with a timer. In this circuit, we use TP MCB ( Tripple Pole Miniature Circuit Breaker ), a magnetic contactor, an on-off delay load, and a fuse. First, we need to connect TP MCB then connect the magnetic contactor with TP MCB, then connect the on-delay load, and a fuse. 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 Contactor wiring with timer:

3 Phase Contactor wiring with timer

Components needed For this Project:

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

  1. TP MCB [See Buy Click Amazon]
  2. Magnetic Contactor [See Buy Click Amazon]
  3. On/Off Delay Load [See Buy Click Amazon]
  4. Fuse [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!

Components used to make the 3 Phase Contactor wiring with timer:

01. TP MCB:

The full meaning of MCB is Miniature Circuit Breaker. 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, the MCB automatically trips and disconnects the main line circuit or household power Connection. TP MCB In Three Pole MCB, Switching & Protection is affected in only Three-Phases and the Neutral is not part of the MCB. 3 pole MCB signifies the Connection of Three Wires for a Three-Phase system R-Y-B Phase. Three-Phase Supply Only Without Neutral.

02. Magnetic Contactor:

A magnetic contactor is an electromagnetic switching device. It is generally used for controlling three-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. 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. The Top-Quality Overload Protector can Effectively Protect Electrical Products from Power Surges.

04. Fuse:

In a 3-phase System Typically only two Fuses will open on a line-to-line short circuit. Since all 3 line currents are offset from each other each fuse will see the full fault at different times. A fuse is a short length of very thin and low melting point conductive wire that can carry a specified amount of current indefinitely when connected to an electrical circuit. If the current flows in excess of the specified amount, the fuse itself melts and isolates the faulty part of the circuit from the source.

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