SU INSTALLATION INSTRUCTIONS

GENERAL

  1. Mount the phasing unit in an upright position at a location convenient to the motor and magnetic starting control.
  2. Check all connections to make certain that none have been jarred loose during shipment.  Make certain that all coil jumper connections are tight.

CONNECTIONS

Some of the leads have been tied together inside the unit at the factory.  Do not disconnect these leads.

  1. The lead marked L1 in the converter will be connected to L1 on the starter between the contacts and the overload heater.
  2. The lead marked L2 in the converter will be connected to L2 on the starter between the contacts and the overload heater.
  3. The lead marked T3 in the converter will be connected to L3 on the line side of the starter ahead of both the contacts and the overload heaters.  All three connections are made inside the standard magnetic motor control box.
  4. Double check the connections.

It is extremely important that a thermal overload lead be connected in the T3 line in order to protect the motor in case the starting relay fails to operate properly or the motor experiences a severe overload or a complete stall.

CIRCUIT BALANCING

If the motor and phasing unit are checked while operating with no load, current in the T3 line will be as high or higher than full rated current.  This is a normal condition, as the current is capacitive and will decrease as the motor load increases.  Should the T3 current exceed full load current of the motor by more that 5%, one of the rectangular running capacitors may be removed from the circuit by disconnecting one lead from the top capacitor.  This will reduce the T3 current.  When the phasing unit and motor have been installed and connected following these instructions, the manufacturer is confident that performance will be more than satisfactory.  Perfect symmetrical balance in phase currents and voltages will not be present as in true three phase operations; however, at full rated load, the TP Phasing unit allows for a near balanced condition.

Follow the diagram above when installing the TP phasing unit.  The T3 line must be connected ahead of the thermal overload on the line side of the contact.  The leads marked L1 and L2 are connected to the two energized phases of the contactor above the thermal overload relays.

 

 

RT INSTALLATION INSTRUCTIONS

GENERAL

  1. Do not undersize your wire.
  2. Consult your utility company as to the size and type of service entrance equipment that you will need.  The transformer which they provide must be large enough to supply the total three phase load, single phase load, the occasional overload and converter.
  3. We prefer that you install the converter indoors but this is not always possible.  Many of our converters have been running for years outside, however, a little shelter will greatly increase the operating life.
  4. Use a safety switch or magnetic starter after the main disconnect to start the converter.
  5. It is possible to up rate the converter by using the power packs.  Consult the factory for further information.

CONNECTIONS

  1. Connect L1 of the single phase power to L1 in the junction box of the converter.
  2. Connect L2 of the single phase power to L2 in the junction box of the converter.
  3. T3 is the manufactured phase and should be color coded.  The phase is not to be used for control coils, lights or any other single phase load.
  4. The phase currents may fluctuate when other motors are started and stopped.  It is sometimes necessary to use the next size larger heater coils.
  5. When the converter is running two motors, each at the maximum horsepower rating, it is likely that one will require a power pack.  A power pack is an additional capacitor bank.  The power pack must always be applied at the load side of the starter so that it will be energized only when that motor is operating.  One lead from the power pack connects with load terminal L2 and the other lead connects ahead of the heater element to load terminal T3.  Failure to install the power pack correctly could damage the converter.
  6. Ground the converter frame.

OPERATING

  1. Line voltage must be within 10% of the voltage rating of the converter (230VAC or 460VAC).  Under no-load conditions the manufactured T3 phase voltage may be 25% above the input voltage.  Under full load the manufactured T3 phase voltage may be 15% lower than the input voltage.
  2. Always allows the converter to reach full operating speed before starting any motors.
  3. Starting loads should not exceed the nameplate rating of the converter.  Smaller motors may be started together if the total horsepower does not exceed the nameplate rating.

SERVICE

Very little service is required to maintain the converter.  Each bearing should be lubricated every 90 days with 1/4 ounce of Chevron Type SR1 or equivalent.

TROUBLESHOOTING

The converter will not start.

  1. Check for low single phase line voltage.

  2. Check fuses.

  3. Check the installation steps again.

  4. Check for a shorted oil capacitor.

  5. Check bearings.

  6. Check for a damaged winding.

The load motor will not start.

  1. Check for low single phase line voltage.

  2. Motor could be faulty.

  3. Motor could be overloaded.

  4. Check heaters.

  5. Check for voltage drop.

Phase currents are greatly unbalanced.

  1. Check for low single phase line voltage.

  2. Converter may be overloaded.

  3. A power pack my be required.

The converter or motor runs hot.

  1. Check bearings.

  2. Check for a damaged winding.

  3. Make sure that the power pack is properly connected.

  4. There may be insufficient load on the converter.

Full Size

Full Size