Auto Transformer Starter Control Wiring Explained with Circuit Diagram

Auto transformer starter control circuit diagram
An Auto transformer Starter is suitable for both star and delta connected motors. In this method, the starting current is limited by using a three-phase auto transformer to reduce the initial stator applied voltage. The figure below shows the motor with the Auto transformer starter.
It is provided with a number of tappings. The starter is connected to one particular tapping to obtain the most suitable starting voltage.
The starting current 6 to 8 times the rated current and this can cause voltage dip in supply and also motor and motor-driven equipment experience large torque surge which can damage the motor as well as connected equipment. Three phase autotransformer is used to reduced high inrush starting current.
Thank You
Arun Gupta
[e-mail]
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[@TheElectricalGuy]

Sorry for the low Voice in this video. I will improve the voice quality in the next video

[@electricalpower1997]

Good1

[@Delmiro20]

Excellent job Man

[@bekeleasegidew463]

excellent explanation.

[@kodjovigilbertdomon7400]

Thank you very much

[@kaundabwalya7776]

Woooow 👏👏😄👏👏Thanks Sir 🙏 just what av been waiting for.. As usual Wonderfuly explained 👍👍

[@rajeshm.rajesh4977]

ATS starter used Timer Qty 02no Due to T/S contactor 10second by OFF delay timer required

[@ezhilezhilan6766]

Excellent explanation....

[@Khalid-jq3uv]

I like the way you call "Friends". I have been following you for long. Please do a video on AC & DC motors. And which simulator are you using.

[@arielcunanan4994]

Nice explanation good job

[@Yaduelectric]

We use auxiliary contactor contacts

[@thusarasanjeewa294]

Very good..

[@jemalali8640]

On the Main contactor

[@sree-gj6uj]

Bro super explanation bro.... Thank u very much..... Please do more electrical related videos. Iam waiting for ur classes. Please please do more videos. Thank u ❤❤❤❤

[@AnasAl-Dhafiri]

Many thanks

[@a.ktripathi5834]

❤ very nice 👍

[@user-gv2bq9vn4u]

in last power circuit diagram, using only 3 magnetic contactor, now control circuit diagram using 4 magnetic contactor.Why?

[@user-ws8cj7id6w]

Video was nice.I have a doubt why 2 contacts using In the line of transformer contactor.

[@vigneshwaran6371]

Star contact safety main contact nc line

[@michaelcostello6991]

Why does Transformer contactor need to latch itself ?? Will the Transformer contactor not be held in by the Star contactor NO auxiliary contact

[@wilfrednyangari2358]

How the main contactor hold in?

[@michaelcostello6991]

Why does AUX NO take power from before the STOP button. Could it be dafter this ???? Just want to know the reason. Is it important ??

[@danielomori3611]

How do I connect the winding of the transformer

[@marcus23antonius]

Aux - NO

[@bonnylasu7665]

Hi hello, I'm interested. I need more to learn

[@juanauguis4901]

How to select the right transformer for a certain motor.?

[@josebaes9443]

how to make auto start transformer for slip ring induction motor ... desin and coputation

[@sree-gj6uj]

Super explanation ❤❤❤❤luv u bro

[@creativemind3562]

How about two speed motor control wiring ?

[@normanbitato4458]

Why transformer contactor has holding on contact while main contactor has no holding on?

[@HemantPatel-fe6vn]

Actually no need For Transformer contactor Holding.

[@abdulhadi9081]

No need of holding contact in transformer contactor

[@normanbitato4458]

Why is the main contactor has no holding on?

[@HemantPatel-fe6vn]

Because Auxiliary Contact already Holding.

[@indravadanbaria4135]

Avaj kam aur Hindi me batao

[@ulluboyandip3586]

Language Hindi

[@AkiteIrene]

That's not the way that starter works

[@sree-gj6uj]

In auxiliary contactor a1 and neutral line a2 we can put motor start lighting circuit bro