Profile: Variacco Electricals is a source for variable auto transformers for testing, calibration equipments, servo voltage stabilizers and for other electrical/electronic equipments. We specially designed inbuilt motorized variable auto transformers with round carbon for servo voltage stabilizers up to 5.0 KVA. Varistat are designed for trouble free operation in industrial use. A special silver plating technique is used on the commutator enabling Varistat to withstand high overloads and maintain constant contact drop. It also insure smooth operation, long life and resist to corrosion.