The starting torque potentiometer should be set so that when the PIC calls for the motor
to start, the rotor should just start to turn. The nominal dial position for a 60 Hz motor is
approximately the 11:30 position. The nominal dial position for a 50 Hz motor is approxi-
mately in the 9:30 position because the board is turned on its side, so that the 9:00
o’clock position is located where the 6:00 o’clock position would normally be located. The
ramp potentiometer should be set so that the motor is up to full speed in 15 to 20 sec-
onds, the bypass contactors have energized, and the auxiliary LCD is energized.
7. Proceed to apply power to the starter.
8. The Power +15 and Phase Correct LEDs should be on. If not, see the starter
Troubleshooting Guide section.
Click here for Figure 30 — Benshaw, Inc. Solid-State Starter Power Stack
Click here for Figure 31 — Ramp Up and Starting Torque Potentiometers
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