Auto Transformers up to 10 MVA, 33 KV
Auto Transformers with (manual / automatic) tap - changing equipment are inserted as voltage regulators, so that customers at the far end of the line receive the same average voltage as those closer to the source. The variable ratio of the Auto Transformer compensates for the voltage drop along the line.
Our ranges are up to 600 A, up to 22 KV and more than 5 taping positions on request.
Auto Transformers applications:
-They are used as a safely starting machines such as induction motors and synchronous motors
-They are used as boosters to give a small boost to distribution cable for compensating the voltage drop
-They can be used as variac.
Auto Transformers advantages:
-Increased KVA rating for a given size and mass .
-Less amount of copper is required.
-Due to smaller size , cost is less compared to a two - winding transformer.
-The resistance and reactance are less compared to a two - winding transformer and hence it has superior voltage regulation.
-Volt - ampere rating is more compared to a two - winding transformer.
-It is possible to get smooth and continuous variation of voltage.