GE Multilin MM300 - Page 58

CHAPTER 4: SETPOINTS CONFIGURATION SETPOINTS
MM300 MOTOR MANAGEMENT SYSTEM – QUICKSTART GUIDE 5
Figure 4-4: Typical starter timing (2 of 2)
The following sections provide additional information for each starter type.
Start A Start B Start A Stop
P - Pre-contactor Time setting
T - Transfer Time setting
R - Ramp Down Time setting
853856A1.CDR
Contactor B relay
Contactor A relay
Pre-contactor
Starting
Running
Motor current
P
T
Contactor C relay
~20 ms
~20 ms
Autotransformer Open Transition 1S-2S
Contactor B relay
Contactor A relay
Pre-contactor
Starting
Running
Motor current
P
T
Contactor C relay
~20 ms
~20 ms
Autotransformer Open Transition 2S-1S
Contactor B relay
Contactor A relay
Pre-contactor
Starting
Running
Motor current
P
T
Contactor C relay
~20 ms
~40 ms
~40 ms
Autotransformer Closed Transition 1S-2S
Contactor B relay
Contactor A relay
Pre-contactor
Starting
Running
Motor current
P
T
Contactor C relay
~20 ms
~40 ms
~40 ms
Autotransformer Closed Transition 2S-1S