Single Phase Step Voltage Regulator

Farady Electric VR-8 single phase step voltage regulators are tap-changing autotransformers. They regulate distribution line voltages from 10% raise (boost) to 10% lower (buck) in thirty-two steps of approximately 5/8% each. Voltage ratings are available from 2400 volts (60 kV BIL) to 34,500 volts (200 kV BIL) for 60 Hz and 50 Hz systems. Internal potential winding taps and an external ratio correction transformer are provided on all ratings so that each regulator may be applied to more than one system voltage. Smaller kVA sizes are supplied with support lugs for pole mounting and with substation or platform tie down provisions. Larger sizes are provided with substation bases with pad-mounting provisions.

Product Standards

1. IEEE Std C57.15™Part 21: Standard requirements, terminology, and test code for step-voltage regulators

2. IEC 60076-21 2018 version Part 21

3. IEEE C57.12.00-2015™ General Requirements for Liquid-Immersed Distribution, Power, and Regulating Transformers

4. IEEE C57.12.90-2015 IEEE Standard Test Code for Liquid-Immersed Distribution, Power, and Regulating Transformers

5. Operating taps comply to IEEE requirements

Main Features

● Regulator Controller

● Tap changer with motor and power supply

● Position indicator with ADD-AMP adjustment

● Two laser-etched nameplates

● Lifting lugs

● Oil drain valve and sampling device

● Upper filter press connection

● Oil sight gauge

● High-creep bushings with NEMA connectors

● Pole-type mounting brackets 

● Substation base (substation units)

● External series arrester

● Automatic pressure relief device

● Control cabinet with removable front panel

● Ratio correction transformer

● Shunt & Series arresters