SVR-1 single-phase step voltage regulators are tap changing autotransformers designed to automatically regulate distribution line voltages in a range of plus or minus 10% in thirty-two steps of approximately 5/8% each. The following ratings are available.

Voltage: 25OO Volts (60 KV BIL) through 19920 Volts (150 KV BIL)

Current: 50 through 1665 Amps

KVA: 50 through 833

Frequency: 50 or 6A Hz

SVR-1 voltage regulators are designed, manufactured and tested in accordance with the requirements of ANSI Standard C57.15.

Radio frequency interference withstand capability per ANSI/IEEE C37.90.2 (1987), electrostatic discharge withstand capability per IEC 61000-4-2 (1995-2001), oscillatory surge and fast transient surge withstand capabilities per ANS| C37.90.1 (2002), metering accuracy per IEEE C57.15 (1999) of 0.3% from -40oC to +85oC (excluding VT/ CT errors)