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Ronk 4SUB Add-A-Phase (1-60 hp, 480V)

  • NEMA 3R Enclosure: 1-25 hp
  • Inside NEMA 3R Enclosure
  • Padmount: 30-60 hp
Please Call for a Price Quote
60.00 LBS

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Ronk 4SUB Add-A-Phase converts 1Ph 480V to 3Ph 480V for 1-60 hp single motor submersible pumps. Please call for low discounted pricing and expert sales/application assistance.

Required Information for a Phase Converter Quote



  • Type SUB is specifically designed for use with deep well submersible pump motors and submersible waste water pump motors.
  • Designed and built to handle the extra load requirements of a submersible pump motor.
  • 4SUB Models convert single phase 480V to three phase 480V.
  • Rugged, high efficiency power converter that produces balanced three-phase power to operate three-phase motors from single-phase power sources.
  • Operates a motor to its full load rating, plus normal overload.
  • Limits in-rush current when the motor is starting.
  • Can be adjusted to provide balanced currents to motors operating at a constant horsepower load enhancing maximum motor life.
  • High operating efficiency of approximately 97%, adding up to a substantial saving in electricity costs compared to other phase converters on the market.
  • Housed in a NEMA 3R outdoor enclosure through 25 hp.  Models over 25 hp are padmount.  See Spec Sheet below for more on configurations and dimensions.
  • Please call to inquire about larger models.
  • UL Listed.

Add-A-Phase Spec Sheet

HP/Model Comparison Chart
Motor HP / Model Single Phase
Full Load Amps
1 hp 4SUB 4A 60 lbs.
1.5 hp 4SUB 6A 63 lbs.
2 hp 4SUB 7A 115 lbs.
3 hp 4SUB 10A 142 lbs.
5 hp 4SUB 15A 165 lbs.
7.5 hp 4SUB 20A 205 lbs.
10 hp 4SUB 30A 245 lbs.
15 hp 4SUB 40A 320 lbs.
20 hp 4SUB 48A 360 lbs.
25 hp 4SUB 58A 420 lbs.
30 hp 4SUB 75A 574 lbs.
40 hp 4SUB 93A 660 lbs.
50 hp 4SUB 110A 755 lbs.
60 hp 4SUB 140A 892 lbs.
Add-A-Phase Type SUB
Single Phase 480V
Three Phase 480V
1, 1.5, 2, 3, 5, 7.5, 10, 15, 20, 25, 30, 40, 50, 60 (Please call for larger hp possibilities)
Single Phase Full Load Amps:
See Chart under Description Tab
Dimensions HxWxD (inches):
Varies - See Spec Sheet
See Chart under Description Tab
Limited Warranty:
5 Years

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