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DOL Starter Diagram - Direct Online Starter for 3 Phase Motor

A platform to learn electrical wiring, single phase, 3 phase wiring, controlling, HVAC, electrical installation, electrical diagrams.

This post is about the dol starter diagram. As you know that dol starter is a starter which contain a magnetic contactor, overload protection relay and NC/NO push button switches. I also share the dol starter wiring diagram. In which I shown the MCCB circuit breaker (molded case circuit breaker) magnetic contactor and thermal overload relay and complete controlling and power wiring. In the today dol starter diagram. I will only shown the symbol type diagram. This diagram contain the complete wiring of a direct online starter.

DOL (Direct Online Starter) Wiring Diagram

In the above dol starter diagram. The R,Y,B is the three phase 380 volts supply. The coil of the contactor is 380 VAC. And the normally open and normally close push button shown. the contactor connection with thermal overload relay and the motor connection with overload relay is shown. Also the earth connection is provided to the motor.

3 Phase Wiring Power Wiring

3 Phase Current Transformer Wiring Diagram

Sikandar Haidar at 3:47:00 AM 2

A platform to learn electrical wiring, single phase, 3 phase wiring, controlling, HVAC, electrical installation, electrical diagrams.

3 phase current transformer wiring diagram for 3 phase load (ampere) testing. As you know that we use the current transformer to measure the current. For testing the current (ampere) running to load we use two types of amp meter. In which one series type which is wired in series between load and supply. And 2nd is a current transformer type which is wired with a current transformer to measure the current. We can wire a current transformer for single phase and also for 3 phase. The current transformer is always used for line ampere testing. For 3 phase system ampere testing every Line have their own current transformer. And these current transformers further connected with 3 ampere meter or one ampere meter and ampere testing selector switch.

For better understanding also read below

How to wire current transformer with digital ampere meter
Ampere meter selector switch wiring with current transformers

How to 3 phase current transformer wiring diagram with ampere meter

Note that if your ampere meter is 100/5A then used only 100/5A ratio current transformer. In the below 3 phase current transformer wiring diagram with amp meter. 3 CT coil, and Amp testing meters shown. The current transformer wiring for each meter.

You can wired the current transformer for three phase system as shown in above diagram. However if you want testing 3 phase ampere with only one ampere meter. Then use ampere selector switch with current transformer. For that you need to wire the all 3 current transformer with amp selector switch. And from the selector switch the two wire supply will goes to ampere meter. From the selector switch you can test at each line(phase) ampere.

Controlling Electrical Wiring Diagrams Single Phase Wiring

How To Wire a 4-way Switch Wiring Diagram

Sikandar Haidar at 10:22:00 PM 1

A platform to learn electrical wiring, single phase, 3 phase wiring, controlling, HVAC, electrical installation, electrical diagrams.

This post is about the 4 way switch wiring diagram. A 4 way switch is a type of switch which is used for switch off/on a light or other electric devices from multiple places. Today in this below 4 way switch wiring diagram. A light is controlled from 3 places. This light bulb can be switch on/off from each switch. For example if a person switch on the light bulb from the first switch then he/she can switch off it from 2nd or 3rd switch.

How To wire a 4 way switch diagram

In the below 4 way switch diagram, a light bulb is control from 3 switches. The first and 3rd switches are 3 way switch, (note that it's also known with name of 2 way switch). And 2nd switch is a 4 way switch.

The neutral wire is shown black color and line wire with red color. The green color is used for earth or ground wire.

I hope this diagram help you very much if you want to learn how to do stair case wiring then the below post and diagram is for you.

How to control one light bulb from two places
How to do stair case wiring with different methods

3 Phase Wiring Controlling Power Wiring

Forward Reverse Starter With Timer 3 Phase Motor Wiring Diagram

Sikandar Haidar at 2:39:00 AM 4

A platform to learn electrical wiring, single phase, 3 phase wiring, controlling, HVAC, electrical installation, electrical diagrams.

Forward reverse starter with timer 3 phase motor wiring diagram. In my last posts I share the wiring diagram of forward reverse three phase motor starter and also the 8 pin timer wiring diagram. This post is about the main and control wiring of forward reverse starter with timer. In the below diagram the main wiring for 3 phase motor is also shown and control wiring is also shown. In the diagram two magnetic contactor shown which coil operated on 220 volts. You must need the neutral wire. However if your magnetic contactor coil is operated on 380 volts then you do not need neutral wire. In the forward reverse starter with timer diagram. The thermal overload relay shown, a normally close push button and two normally open push button shown.

Forward Reverse Starter with Timer 3 Phase Motor Wiring Diagram

In the below forward reverse with timer starter diagram. The timer is used for automatic off (or automatic switch off the motor when the motor complete his running time.

All the wiring connection of forward reverse starter with timer shown. The timer is used only for one contactor. And timer will only switch off one contactor with its complete his time. The control wiring of starter is shown clear to understand. If you want need more help then also read the below post.

Also read
Forward reverse starter wiring diagram explained
8 pin timer wiring diagram
How on delay timer works (8 pin timer) diagram.

I hope after reading all the related wiring diagram with forward reverse with timer starter diagram. Now you will be understood. However if you have any question according the post then you can ask in below commenting section.

3 Phase Wiring Protection

Shunt Trip Breaker Wiring Diagram

Sikandar Haidar at 9:37:00 AM 2

A platform to learn electrical wiring, single phase, 3 phase wiring, controlling, HVAC, electrical installation, electrical diagrams.

Shunt trip breaker wiring diagram, This post is about the single wiring diagram of mccb shunt trip breaker. In the diagram a MCCB (molded case circuit breaker) shown which is wired for 3 phase system. The breaker shunt trip coil is controlled by the emergency switch. Which is also known with the name of kill switch.

MCCB Shunt Trip Breaker Wiring Diagram With Kill Switch

In the above MCCB shunt trip breaker wiring diagram. The incoming 3 phase 4 wire system supply shown. The shunt breaker is 3 pole. Which is used for 3 phase system. But the coil of shunt is 220 VAC. So neutral is required also. The neutral wire is connected to the shunt coil. And line wire is controlled with kill switch. The kill switch normally open contacts are used. Also the symbol diagram is shown.

Also read.
Contactor Wiring diagram For 3 phase motor
Earthing system and how earthing is protect us