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CHAPTER 2: INSTALLATION
STARTER TYPES
MM300 MOTOR MANAGEMENT SYSTEM – INSTRUCTION MANUAL
2–35
Figure 2-39: Soft starter typical control wiring - IO_E
NOTE
NOTE:
The above drawing applies only to a high-voltage power supply. If a low-voltage (DC)
power supply is used, an appropriate DC voltage source must be used for this power
supply.
.
The soft starter type is used with an external soft starter that ramps the motor speed up on
start and down on stop. Once the motor is ramped up, the soft starter can be bypassed.
When a start A control is received, the pre-contactor (if any) is picked up for the set delay,
then relay1 picks up and seals-in, picking up contactor 1M. This provides power for the soft
starter to start up and to drive the motor. Relay2 closes after a 1 second delay, and seals
in, which signals the soft starter to ramp up the motor, then relay 2M signals the soft
starter to ramp the motor up. When the soft starter signals up-to-speed by picking up
auxiliary relay UTS, the starter generates the soft starter bypass signal. When a stop
control is received, relay2 drops out, signalling the soft starter to ramp down. When the
ramp down time timer has expired, relay1 is opened, M1 drops out, cutting power to the
soft starter and motor.
Forced starts (for example, External Start) operate in the same fashion as other starts;
relay2 closes after a 1 second delay. If up-to-speed feedback is not received from auxiliary
relay UTS within the
RAMP UP TIME
setting during a start, a Drive Start Failed alarm is
generated. If soft starter speed feedback remains when the ramp down time expires
during a stop, a Drive Stop Fail alarm is generated. Neither results in a trip or a stop. The
Drive Start Failed alarm is cleared by a stop control.
The B Open Contactor Control Circuit and B Welded Contactor alarms implemented in the
start/stop control element are defeated when the soft starter is selected.
The Undervoltage Autorestart feature is disabled for the Soft Starter.
NOTE
NOTE:
Connect AUX VT to the Control Supply for correct operation of the UV Restart feature and
correct input readings.
1M
1M
Field Start
Reset
UTS
Field Stop
2M
BP
UTS 2M
MM300
Low Voltage
Motor
Manager
C1
C2
C3
C4
C5
C6
C7
C8
C9
C10
C11
C12
C13
C14
Au
x
VT
IN
1
IN
2
IN
3
IN
4
IN
5
IN
6
Co
m
Re
la
y
1R
el
a
y
2
L
N
PSU
N
L
GE Multilin
853709B3.cdr
I/O
Module
-T
y
pe
E
Low Voltage
DC Suppl
y
to
IO T
y
pe E
+
-
AC
Control Power
G
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 ...