3 phase motor connection diagram

3 phase motor connection diagram:

This diagram shows how to make 3 phase motor connection diagram. In this circuit, we use a differential switch, an FP MCB ( Four Pole Minature Circuit Breaker  ), an RCCB ( Residual Current Circuit Breaker ), a DP MCB ( Double Pole Minature Circuit Breaker ), a motor protector device, a magnetic contactor, and a timer. Here we need to connect all components like our diagram.

Diagram of 3 phase motor connection wiring:

Fig 1: 3 Phase motor connection diagram

Components Need for this Project:

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

1. RCCB [See Buy Click Amazon]
2. DP MCB  [See Buy Click Amazon]
3. FT MCB  [See Buy Click Amazon]
4. Contactor  [See Buy Click Amazon]
5. Timer [See Buy Click Amazon]
6. Motor Starter Protector [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!

Read Also:

• 3 phase star motor connection diagram

• star delta starter wiring diagram

• Timer contactor wiring diagram

• Timer With Selector Switch Wiring Diagram

• Timer with two contactor wiring

Components used to make the 3 Phase Motor wiring:

01. RCCB 

Fig 2: RCCB

The RCCB (Residual Current Circuit Breaker) or RCCB is an electrical protective device. A residual Current Circuit Breaker is specially designed to protect the electrical circuit against earth faults and humans from electrical shock. In this, under normal conditions the load is always connected between the phase terminal to the neutral terminal, hence the flow of the phase current is equal to the neutral current. Earth fault or fault in a power system can cause excess heating, more power consumption, burning or fire, etc. So, protection against earth leakage is very important.

02. DP MCB

Fig 3: DP MCB

Double pole MCB can control two wires. This circuit breaker is generally used in single-phase electric lines. Double pole MCB circuit breaker input has two wires supply two wires and an output. In a single-phase line, A double-pole MCB circuit breaker is used to give good production. This circuit breaker is provided through phase and neutral circuit breaker, it is very safe. This circuit breaker is preferred for home appliances. A DP MCB usually trips for 2 reasons 1. Overload 2. Short circuit.

03. FT MCB

Fig 4:  FT MCB

Four pole MCCB for Four wires connections, the one additional Four pole for neutral wire connection so that between neutral and any of the other three will supply. It is used where is the possibility of a high neutral current (due to unbalanced loads and /or Third and multiple Third harmonics current etc) and Neutral / Earth Protection is provided on Neutral. Four Pole Circuit Breakers Have advantages in the case When one of the Poles of the Device will get Damaged, and they also provide Isolation from neutral voltage.

04. Contactor 

Fig 5: Contactor 

A magnetic contactor is an electrical device used for load control, automation, and protection. It is much like a magnetic reel. However, relays are generally used for low power and voltage, on the other hand, when we think of high power, these heavy-duty contractors only come to mind. It basically works by switching the load on and off. It has 3 terminals whose inputs are denoted as L1, L2, L3, and outputs as T1, T2, and T3. The circuit of the load is made in automation mode or protection using auxiliary contacts. It has two types of terminals. 1) Normally Open (NO). 2) Normally Closed (NC)

05. Timer 

Fig 6: Timer

Timer is a specialized type of clock used for measuring specific time intervals.An electromechanical cam timer uses a small synchronous AC motor turning a cam against a comb of switch contacts. This type of timer often has a friction clutch between the gear train and the cam, the cam can be turned to reset the time.A simple example of the first type is an hourglass. Working method timers have two main groups: hardware and software timers.Most timers give an indication that the time interval that had been set has expired.

06. Motor Starter Protector

Fig 7: Motor Starter Protector

3-phase Motor starters, motor protection circuit breakers (MPCBs) or manual motor protectors (MMPs) control wiring useing switching. There are electromechanical protection devices for the main circuit diagram. They are mainly used to switch motors ON/OFF manually and to provide fuseless protection against short-circuit overload and phase failures switching motor control circuit diagram.

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