3 Phase Star Delta Motor Wiring:

This diagram shows how to make 3-Phase Star Delta Motor Wiring. In this circuit, we use a total of three magnetic contactors, an NC ( Normal Close ) switch, an NO ( Normal Close ) switch, an SP MCB ( Singel Pole Miniature Circuit Breaker ), a TP MCB ( Tripple Pole Miniature Circuit Breaker ), a digital timer, and a 3 phase motor. This diagram is very simple and easy to make. If you want to know more about this circuit diagram please check our youtube video in the below post.

Diagram of 3 Phase Star Delta Motor Wiring:

Components needed For this Project:

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

3 Phase Motor (5 HP) [See Buy Click Amazon]
Magnetic Contactor 40A [See Buy Click Amazon]
TP MCB 32A [See Buy Click Amazon]
8 Pin Timer 220V AC [See Buy Click Amazon]
SP MCB 10A [See Buy Click Amazon]
Push Button NC Switch [See Buy Click Amazon]
Push Button NO Switch [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 Star Delta Motor Wiring:

01. Three 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.

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. 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.

04. 8-Pin Timer:

A timer is a type of time-switching device that controls and controls Electrical circuits and electrical and electronic devices through time setting (on/off). The timer is basically 8-pin. Like other controlling devices the timer has a coil and when this coil is magnetized, the timer works on/off. The timer has 2 common ends and each common end has normally close and normally open options. When the timer is set by time, the timer trips at the end of that time and turns the common is normally closed (on) to open (off) and normally open (off) to close (on). This is how the timer works.

05. SP MCB:

In single-pole MCB, Switching and protection are Affected in only one Phase. Single phase supply to break the phase only. A single Pole breaker is Typically used with 120-volt Circuits, and a 6-20 amps Miniature Circuit Breaker. They are constructed with one Line Wire and one Neutral wire. A Single Pole switch is the most basic General-Purpose switch that you use to Control a light or another device from one location. These Switches have 2 Brass-Colored screw Terminals Connected to the hot Power source wires. Pole refers to the number of Circuits Controlled by the Switch SP Switches Control only one Switch Electrical Circuit.

06. NC Switch:

An NC (Normally Closed) Push Button is a Push Button That, In Its Default State, Makes Electrical Contact With The Circuit. An NC (Normally Closed) Push Button is a Push Button that, in its Default State, Makes electrical Contact With the Circuit. When The Button Is Pressed Down, The Switch no Longer Makes Electrical Contact And The Circuit is Now Open. When The Button is Not Pressed, Electricity Can Flow, But When it is Pressed The Circuit is Broken. This type Of Switch is Also known As a Normally Closed (NC) Switch.

07. NO Switch:

NO (Normally Open) Terms Refer to a Type of Dry Contact or Wet Contact. A Push to Make Switch Allows Electricity to flow Between its 2 contacts when held in. When the button is released, the Circuit is broken. This type of Switch is also known as A Normally Open (NO) Switching system. As its name implies, a Normally Open (NO) Switch Contact or “a Contact” is a Switch. Put very simply, a Normally Open Sensor will have no Current When in a Normal State But When it Enters an Alarm State it will have +5V applied to the Circuit.

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Frequently asked questions

What is the difference between the star and delta motor wiring?

In star wiring, the three winding phases of the motor are combined to form the so-called star point. With a supply voltage of 400 V, the phase voltage (voltage between the line conductors) was about(230 V) each. In delta wiring, the ends of the three winding phases were combined and connected to the individual phases.

What is the difference between Delta and Star 3-phase wiring?

In this configuration, there is no neutral point. The main difference between the two connections lies in their application. The star connection is commonly used in systems where a neutral point is required for grounding, while the delta connection is often used in systems where a neutral point is not needed.

What is the star-delta connection for 3 phase motor?

A star connection is a four-wire system, whereas a Delta connection is a three-wire system. Star-delta connection is one type of starting method of a 3-phase AC induction motor. Normally starter was used for the smooth starting of a motor. Star-delta starter starts the motor to reduce the initial current. supply.

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Now let's see how you can connect the motor windings in a star or delta connection. For the star connection, you just need to connect the lower ends of the windings U-2, V-2, and W-2. If you then connect U1 to W-2, V-1 to U-2, and W1 to V1, the winding connection will be in the delta.

Does a 3-phase motor need a neutral?

3-phase systems may or may not have a neutral wire. A neutral wire allows the 3-phase system to use the higher voltage while still supporting lower-voltage single-phase appliances. In high-voltage distribution situations, it is common not to have a neutral wire as the loads can simply be connected between the phases.

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3 Phase Star Delta Motor Wiring