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Ronk 3SUB Add-A-Phase (1-60 hp, 240V-480V)

  • NEMA 3R Enclosure: 1-25 hp
  • Inside NEMA 3R Enclosure
  • Padmount: 30-60 hp
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119.00 LBS

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Ronk 3SUB Add-A-Phase converts 1Ph 240V 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.
  • 3SUB Models convert single phase 240V 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.
  • UL Listed.

Add-A-Phase Spec Sheet

HP/Model Comparison Chart
Motor HP / Model Single Phase
Full Load Amps
1 hp 3SUB 7A 119 lbs.
1.5 hp 3SUB 9A 127 lbs.
2 hp 3SUB 13A 138 lbs.
3 hp 3SUB 20A 160 lbs.
5 hp 3SUB 30A 190 lbs.
7.5 hp 3SUB 40A 240 lbs.
10 hp 3SUB 60A 285 lbs.
15 hp 3SUB 80A 380 lbs.
20 hp 3SUB 95A 400 lbs.
25 hp 3SUB 115A 450 lbs.
30 hp 3SUB 150A 635 lbs.
40 hp 3SUB 185A 720 lbs.
50 hp 3SUB 220A 867 lbs.
60 hp 3SUB 280A 975 lbs.
Add-A-Phase Type SUB
Single Phase 240V
Three Phase 480V
1, 1.5, 2, 3, 5, 7.5, 10, 15, 20, 25, 30, 40, 50, 60
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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