GE Multilin MM300, Instruction Manual

Page: 49 / 198

CHAPTER 2: INSTALLATION STARTER TYPES
MM300 MOTOR MANAGEMENT SYSTEM – INSTRUCTION MANUAL 2–29
Figure 2-33: Two-speed 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.
.
This starter type is a full voltage or across-the-line two speed starter.
When a start A (low speed) 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 contactor L, which starts the motor in low speed. When a start B
(high speed) control is received, the relay1drops out, and contactor L drops out. When
contactor L Off status is received, the relay2 picks up and seals-in, picking up contactor H,
which starts the motor in high speed. Should a start A (low speed) control be received when
relay2 is picked up, relay2 is drops out, and contactor H drops out. When contactor H Off
status is received, the starter waits for the set transfer time to allow the motor to slow.
When the transfer time timer times out, the relay1 picks up and seals-in, picking up
contactor L, which starts the motor in low speed. When a stop control is received, the
relays 1 and 2 drop out, contactors L and H drop out, and the motor stops. If the
HIGH
SPEED START BLOCK setting is “Enabled”, this starter will not allow a start B (high speed)
control unless already running at low speed.
The pre-contactor is omitted on forced starts (for example, UVR Immediate, External Start).
Forced starts are not supervised by the starter transfer timer – any external starting circuit
must itself respect high to low speed transition restrictions and starting in high speed
restrictions.
NOTE
NOTE:
Connect AUX VT to the Control Supply for correct operation of the UV Restart feature and
correct input readings.
H
L
L
Inter-
lock
H
MM300
Low Voltage
Motor
Manager
PSU
C1
C2
C3
C4
C5
C6
C7
C8
C9
C10
C11
C12
C13
C14
Au
x
VT
G N
L
IN
1
IN
2
IN
3
IN
4
IN
5
IN
6
Co
m
Re
la
y
1R
el
a
y
2
L
N
Field Start Low
Field Stop
Field Start High
853706B3.cdr
I/O
Module
-T
y
pe
E
Low Voltage
DC Suppl
y
to
IO T
y
pe E
+
-
AC
Control Power
GE Multilin