Single-Phase Step Voltage Regulators

Single-Phase Step Voltage Regulators

Howard Power Solutions SVR-1 single-phase step voltage regulators are tapchanging 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. Internal potential winding taps and/or an external ratio correction transformer are provided on all ratings so that each regulator may be applied within a range of system voltages. A digital control system automatically operates the tap changer mechanism to maintain system voltage within desired limits. The control system is externally programmable to allow precise setting of control limits and provides sophisticated capabilities for special control requirements, communication, and data logging.

Howard Industries manufactures a complete line of transformers, all designed with increased margins of safety and reliability. Contact your distributor or factory representative for availability of other kVA sizes, voltage ratings, features, accessories and design standards not listed.

Talk to us about filling a custom order that best fits your needs.


Voltage: 2500 Volts (60 kV BIL) through 19920 Volts (150 kV BIL)
Current: 50 through 1665 Amps
kVA: 50 through 833
Frequency: 50 or 60 Hertz
Meets or exceeds applicable IEEE, NEMA, and RUS standards
Gear-driven tap-changer switch with motor and power supply
Motor capacitor mounted in control enclosure for ease of replacement
Mechanical tap position indicator with externally adjustable HI-AMPT limit switches
Laser-etched nameplates (two)
Lifting lugs
Oil drain valve with sampling device
Upper filter press connection
Oil sight gauge
High-creep porcelain bushings
Bolt-down provisions (overhead type regulators)
Pole mounting brackets (overhead type regulators)
Rectangular substation base (substation type regulators)
Externally mounted series arrester (MOV type)
Mounting provisions for shunt arresters
Automatic pressure relief device
Powder coated mild steel tank, cover, clamp ring, and control enclosure
HI/ICMI UVR-1 digital regulator control
RUS listed designs
Externally mounted shunt arresters (MOV type)
Wildlife protection for high-voltage bushing terminals and lightning arresters
Extra-length control cable
PT's and CT's for external metering
Elevating platform
Control enclosure heater
4-hole NEMA H-spade connectors
Cooling fans
Powder coated stainless steel tank, cover, clamp ring, and control enclosure
Schweitzer digital regulator control