The automatic voltage regulator (AVR) is a device designed to regulate voltage automatically to take a fluctuating voltage level and turn it into a constant voltage level. 100% capacity utilization of the transformer. Low input ranges can be stabilized in high ratings. As Low as 5KV – 12KV up to 5000 KVA. On load steeples voltage regulation. Tap change selector: 9/11/13/17/27/32 position. Rating Voltage: 11 / 33kV or customized.