CHAPTER 2: INSTALLATION
STARTER TYPES
MM300 MOTOR MANAGEMENT SYSTEM – INSTRUCTION MANUAL
2–31
Figure 2-35: Wye-delta open transition starter control wiring - IO_E Module
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 wye-delta open transition starter is a reduced voltage starter.
When a start A control is received, the pre-contactor relay (if any) is picked up for the set
pre-contactor time. When the pre-contactor timer times out, relay1 picks up and seals-in,
picking up the 1S contactor, which connects the motor in wye configuration. The 1S
contactor in turn picks up the 1M contactor, which connects the motor to the supply. The
motor is now starting at 58% voltage. When the transfer time timer expires, the relay1 is
de-energized, contactor 1S drops out, opening the wye and disconnecting the motor from
the supply. When the contactor 1S Off status is received, relay2 picks up and seals-in,
picking up the 2M contactor, which connects the motor in delta configuration. The 2M
contactor in turn picks up the 1M contactor, which connects the motor to the supply. The
motor is now running at full voltage. When a stop control is received, relays 1 and 2 drop
out, contactor 1S and 2M drop out, contactor 1M drops out, and the motor stops.
Pre-contactor is omitted on forced starts (for example, UVR Immediate, External Start).
Otherwise, type A forced starts operate in the same fashion as other type A starts, with the
transfer to full voltage occurring when the transfer time expires. Type B forced starts are
not supervised by this starter transfer timer – any external type B starting circuit must
itself respect full voltage starting restrictions.
NOTE
NOTE:
Connect AUX VT to the Control Supply for correct operation of the UV Restart feature and
correct input readings.
2M
1S
Inter-
lock
2M
1M
1S
2M
1S
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
853707B3.cdr
Field Start
Field Stop
Low Voltage
DC Suppl
y
to
IO T
y
pe E
I/O
Module
-T
y
pe
E
AC
Control Power
+
-
GE Multilin
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 ...