5–16
MM300 MOTOR MANAGEMENT SYSTEM – INSTRUCTION MANUAL
CONFIGURATION SETPOINTS
CHAPTER 5: SETPOINTS
9.
Wait until contactor R closed status is received.
10. Open contactor 2S.
2S-1S start sequence:
1.
Start A command received by the MM300 (serial, digital input or faceplate).
2.
Wait for the time set in
Pre-Contactor Time
setpoint.
3.
Close and maintain contactor 2S. Reduced voltage is applied to the motor.
4.
Wait until contactor 2S closed status is received, then close and maintain contactor
1S.
5.
Wait for the time set in the
Transfer Time
setpoint.
6.
Open contactors 1S.
7.
Wait until contactor 1S open status is received.
8.
Close and maintain contactor R. Full voltage is applied to the motor.
9.
Wait until contactor R closed status is received.
10. Open contactor 2S.
Stop/trip sequence:
1.
Stop command received by the MM300 or a trip occurs.
2.
Open Contactor R.
3.
Open Contactors 1S and 2S if they are not already opened.
The following figures illustrate typical starter timing beginning from the stopped state.
Figure 5-13: Typical starter timing for autotransformer closed transition starter 1S-2S
Figure 5-14: Typical starter timing for autotransformer closed transition starter 2S-1S
Contactor B relay
Contactor A relay
Pre-contactor
Starting
Running
Motor current
P
T
P = Pre-contactor time setting
St
a
rt
A
St
a
rt
B
St
a
rt
A
St
o
p
Contactor C relay
T = Transfer Time
~20 ms
~40 ms
853854A1.CDR
~40 ms
Contactor B relay
Contactor A relay
Pre-contactor
Starting
Running
Motor current
P
T
P = Pre-contactor time setting
St
a
rt
A
St
a
rt
B
St
a
rt
A
St
o
p
Contactor C relay
T = Transfer Time
~20 ms
~40 ms
853855A1.CDR
~40 ms
Summary of Contents for Multilin MM300
Page 20: ...1 14 MM300 MOTOR MANAGEMENT SYSTEM INSTRUCTION MANUAL SPECIFICATIONS CHAPTER 1 INTRODUCTION ...
Page 184: ...6 8 MM300 MOTOR MANAGEMENT SYSTEM INSTRUCTION MANUAL COMMANDS CHAPTER 6 DIAGNOSTICS ...
Page 198: ...A 6 MM300 MOTOR MANAGEMENT SYSTEM INSTRUCTION MANUAL REPAIRS CHAPTER A APPENDIX A ...