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Ronk 2SUB-8 Add-A-Phase (1-30 hp, 240V-208V)

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

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Ronk 2SUB-8 Add-A-Phase converts 1Ph 240V to 3Ph 208V for 1-30 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.
  • 2SUB-8 Models convert single phase 240V to three phase 208V.
  • 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 2SUB-8 7A 60 lbs.
1.5 hp 2SUB-8 9A 63 lbs.
2 hp 2SUB-8 13A 110 lbs.
3 hp 2SUB-8 20A 140 lbs.
5 hp 2SUB-8 30A 165 lbs.
7.5 hp 2SUB-8 40A 205 lbs.
10 hp 2SUB-8 60A 242 lbs.
15 hp 2SUB-8 80A 310 lbs.
20 hp 2SUB-8 95A 350 lbs.
25 hp 2SUB-8 115A 390 lbs.
30 hp 2SUB-8 150A 555 lbs.
Add-A-Phase Type SUB
Single Phase 240V
Three Phase 208V
1, 1.5, 2, 3, 5, 7.5, 10, 15, 20, 25, 30
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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