Rectifiers & Electronics manufactures Compact & Easy to Operate Variable Auto Transformers. Rectifiers & Electronics is an ISO 9001:2000 certified company. The Compact & Easy to Operate Variable Auto Transformers are used where voltage control is needed. It is made from 2 A to 2000 A for Single and Three Phase. It contains special Insulating Paper used in transformer winding. These Compact & Easy to Operate Variable Auto Transformers provide good after sales service.