Single-Phase Step Voltage Regulators

Howard Industries 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.
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• 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

Standard Features
• 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 (More Info)
• RUS accepted designs

Optional Features
• 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
• HI/ICMI simplified regulator control (More Info)
• HI/Beckwith digital regulator control (More Info)
• Schweitzer digital regulator control (More Info)
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