GE Multilin MM3 Motor Manager 3 Instruction Manual page 41

CHAPTER 2: INSTALLATION
MM3 MOTOR MANAGER 3 – INSTRUCTION MANUAL
3. Wait 20 ms, close and maintain the auxiliary 1 output relay – power is applied
to the autotransformer.
4. Wait for the time set in the
5. Open contactor A and auxiliary output relays.
6. Wait 20 ms.
7. Close and maintain contactor B output relay.
Start (CONTACTOR SEQUENCE
1. Start command received by the MM3 Motor Manager 3 (serial, switch input or
faceplate).
2. Close and maintain the auxiliary output relay; power is applied to the
autotransformer.
3. Wait 20 ms, close and maintain contactor A output relay – close the 1S
contactor.
4. Wait for the time set in the
5. Open contactor A and auxiliary output relays.
6. Wait 20 ms.
7. Close and maintain contactor B output relay.
Stop/trip sequence:
1. Stop command received by the MM3 Motor Manager 3 or a trip occurs.
2. Open contactor B output relay.
If feedback is not received from the 1S, 2S or R contacts to the contactor A, B or auxiliary
relay status N.O. inputs within one second of closing contactors A, B or the auxiliary relay,
an open control circuit alarm will occur. This opens contactors A, B and the auxiliary relay.
If feedback remains at any of the Status N.O. inputs for more than one second after
opening the its respective relay, a welded contactor alarm will occur.
CHANGE OVER TIME
set to 2S-1S) sequence:
CHANGE OVER TIME
STARTER TYPES
setpoint.
setpoint.
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