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RONK 7.5 HP 2S-8 ADD-A-PHASE Power Converter Type S

$ 4,071.27

The RONK 7.5 HP 2S-8 Type S is the standard ADD-A-PHASE static three-phase converter can be used for most pump, air compressor, and fan and blower applications. The design allows adjustment to provide balanced three-phase power at any motor load point up to the converter’s rating.

Description

The RONK 7.5 HP 2S-8 Type S is the standard ADD-A-PHASE static three-phase converter can be used for most pump, air compressor, and fan and blower applications. (Single motor applications only.) The Type S is a cost-effective unit that operates constant horsepower loads more efficiently (approx. 97%) than other phase converters on the market. This high efficiency provides a much lower operating cost over the life of the converter.

As the finest static phase converter available, the RONK ADD-A-PHASE design allows adjustment to provide balanced three-phase power at any motor load point up to the converter’s rating. The high operating efficiency and low standby losses make the ADD-A-PHASE ideal in most automated applications.

The Balanced three-phase power is dependent on both the converter and the motor. When no current is drawn by the load (motor off), voltages will not be balanced. Then while the motor is energized, the third phase current is supplied by capacitors at an appropriate phase angle. When the motor reaches full speed, a portion of the capacitance is automatically switched out of the circuit, and running current is provided by the transformer and oil capacitors. Changing capacitance will change the magnitude of manufactured phase current. Changing transformer tap will change the phase angle. The ADD-A-PHASE is the only static converter which provides these two degrees of freedom to balance currents.

Operation:

In normal applications, the ADD-A-PHASE is energized continuously by the single-phase input voltage. Standby losses are very low. Since no current is present in the capacitors, no voltage or phase shift is present on the capacitors and the output voltages reflect only the voltages across the transformer windings.

Two relays and a normally open contactor are used to switch start capacitance. When the motor is energized, the auxiliary relay closes and the start contactor closes. Both banks of capacitors deliver starting
current in the “A” phase. As the motor reaches full speed (typically 1-3 seconds), voltage feedback from the motor is sensed by the control relay, opening its contacts. This drops out, or opens, the start contactor,
removing start capacitance from the power circuit. The motor continues to run with “A” phase current supplied by the run (oil) capacitors and transformer. When the motor is turned off, the auxiliary relay opens and the control relay resets.

RONK 7.5 HP 2S-8 Specifications:

  • Horse Power: 7.5
  • Enclosure: 107
  • Starting Current: Approximately 300% of single-phase input FLA
  • Input Voltage (Single Phase):
    • Model 2S: 240 V
    • Model 3S: 240 V
    • Model 4S: 480 V
    • Model 2S-8: 240 V
  • Output Voltage (Three Phase):
    • Model 2S: 240 V
    • Model 3S: 480 V
    • Model 4S: 480 V
    • Model 2S-8: 208 V
  • Motor Ratings: 1 HP to 125 HP

Features:

  • Cost-effective – This unit operates constant horsepower loads more efficiently (approx. 97%) than other phase converters on the market. This high efficiency provides a much lower operating cost over the life of the converter.

Applications:

  • Blowers
  • Dryer
  • Exhaust
  • Heating system
  • Breathing air compressors
  • Compressors
  • Air cycling piston
  • Refrigeration
  • Farmstead dryers
  • General applications
  • Machine shops
  • Motor-driven welders
  • Pumps
  • Centrifugal
  • Heat
  • Heating systems
  • Irrigation
  • Manure
  • Turbine

 

SPECIFICATIONS PDF

USER MANUAL PDF

WIRING DIAGRAM PDF

RONK WARRANTY PDF

Additional information

Weight 165 lbs
Dimensions 26 × 12.88 × 18.63 in
Manufacturer Part Number

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