Auto Transformer Auto transformer is also voltage transformer. The auto transformer is based on the characteristics of the tapped windings. This device is really more in the nature of a circuit arrangement than a distinct breed of component aspect. In some special cases, electrically it is almost identical with the standard two winding transformer connected in series. Here the primary is connected across the supply in the normal way. But the secondary is connected in series with the supply so that its voltage adds to the supply voltage when the output is taken across the both windings. Auto

Welding Transformer Welding Transformer is also voltage and current transformer having low flux density with high current and operating voltage is 52 volts without any injuries to human body. This transformer is used in so many places to weld one part to another MS part. Generally this equipment is used in all fabrication shop and Industries.

Variable Transformer A variable transformer, which is known by several trade names such as variac, Dimmerstat etc., is also an auto transformer, but it has a continuously variable tap so that any output voltage desired could be obtained. It is a very useful piece of equipment in any laboratory or test room. Variacs are available for 230 V single phase in various sizes. However, it is built by mounting three single phase units one above the other and coupling their spindles to a common control wheel. Variacs are rated by their current capacity which is independent of the output voltage. SPEC

Power Transformer Power transformer is also voltage transformer and used to achieve an accurate voltage ratio. The voltage ratio falls off as the load current increases. The difference between the full load and No-load voltages is usually expressed as percentage (regulations). In most cases the regulation is expected to be reasonably good in Power transformer which is distributed from the power station. It is used in Power house, Power Plants and Industries etc. SPECIFICATION

Isolation Transformer Isolation transformer is also voltage transformer. There is no direct connection between the two windings. They are connected only by the intangible lines of magnetic flux in the core. In some types of circuit the transformer may have 1.1 turns ratio that is to say non step-up or non step-down action. The only function of this transformer is to isolate the circuit from the supply. SPECIFICATION DYn 11 Vector Group D: The winding primary is connecte