Auto Transformer Working & Specification

An Auto-transformer is an electrical transformer with one and only one winding. The "auto" implies the single loop following itself and not to any sort of programmed instrument. In an auto transformer parcels of the same winding fill in as both the essential and optional. The winding has no less than three taps where electrical associations are made. 

Auto-transformers have the favorable circumstances of regularly being littler, lighter, and shabbier than ordinary double winding transformers, yet auto-transformers have the weakness of not giving electrical confinement.

Autotransformers are regularly used to venture up or go down voltages in the 110-115-120 volt extend and voltages in the 220-230-240 volt go for instance. giving 110 or 120V taps) from 230V enter, permitting supplies intended for 100 or 120 volts to be utilized with a 230 volt supply. 

Auto Transformer Operation :

An autotransformer has a specific winding with two close terminals, and one or more terminals at moderate tap focuses, or a transformer in which the essential and auxiliary loops have part or the sum of their turns in as something to be shared. The essential voltage is connected over two of the terminals, and the optional voltage taken from two terminals, generally dependably having one terminal in just the same as the essential voltage. 

The essential and auxiliary circuits in this way have various windings turns in common. Since the volts-for every-turn is the same in both windings, every improves a voltage in extent to its number of turns. In an autotransformer part of the present streams straightforwardly from the information to the yield, and just part is exchanged inductively, permitting a littler, lighter, shabbier center to be utilized and needing just a solitary winding.

About Padmavahini Transformers :

Padmavahini Transformers is the manufacturer and exporter of all types of transformers, which is manufactured according to the international quality standards. We are certified with ISO 9001:2000 certification and currently we are operating from Coimbatore, India.

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  4. Auto Transformer also recognized as an auto step down transformer which is similar to any regular transformer but the only difference is that it shares only one winding for transmitting the power. Its main applications area is power transmission and distribution, audio system, and railways.

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  6. Thats great post !! I like ur every post they always give me some new knowledge.
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  7. Custom transformers can be used in both domestic and industrial applications to reduce the possibility of short circuits. However, there are certain precautions and care to be taken even in case of custom transformers.
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  8. Nice Post! Good information about how auto transformer winding is working in electrical transformers. It is so helpful to me. keep sharing.

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  10. Trutech Products was founded in the year 1997, and nowadays, it is known as one of the best Transformer manufacturers in Pune And Mumbai, India suppliers and exporters. more info visit


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