GE MM3, Instruction Manual, Page: 37 / 230

CHAPTER 2: INSTALLATION STARTER TYPES
MM3 MOTOR MANAGER 3 – INSTRUCTION MANUAL 2–19
The slip ring starter type can be used for the primary resistance starter type since it has the
same logic as the slip ring starter.
When the power to the MM3 Motor Manager 3 is interrupted, all output relays on the MM3
Motor Manager 3 will de-energize causing them to open and stop the motor. The MM3
Motor Manager 3 can only be wired for fail-safe operation.
If feedback is not received from the S or R contacts to the Contactor A or B Status N.O.
inputs within one second of closing contactor A or B output relays, an open control circuit
alarm will occur. This will cause contactor A and B output relays to open. If feedback
remains at the Contactor A or B Status N.O. input more than one second after opening the
contactor A or B output relays, a welded contactor alarm will occur.
A separate voltage transformer must be used for the VT input to accurately measure the
voltage at the motor. See
Primary Resistance Starter on page 2–18.
Figure 2-15: Primary Resistance Starter
GE POWER MANAGEMENT