GE MOTOR MANAGER 2 User Manual

9-24 MM2 Motor Manager 2
GE Power Management
9.8 AUTOTRANSFORMER CLOSED TRANSITION STARTER 9 STARTER TYPES
9
9.8 AUTOTRANSFORMER CLOSED TRANSITION STARTER 9.8.1 DESCRIPTION
This starter type is a reduced voltage starter. When the start button is pressed, timing relay TR is
picked up and seals itself in. The 1S coil is also picked up which in turn picks up the 2S coil. The 2S
coil seals itself in. The 1S contacts configure the autotransformer windings into an open delta for two
winding or wye for three winding autotransformers. The 2S contacts bring the autotransformer on
line, providing reduced voltage to the motor. When timing relay TR times out the 1S coil drops out
and then R is picked up. When the R contacts pick up then 2S is dropped out. The motor now has full
voltage applied.
Figure 9–18: ELEMENTARY AUTOTRANSFORMER CLOSED TRANSITION STARTER
To program the MM2 for autotransformer closed transition starter, set:
S1 CONFIGURATION\STARTER\STARTER TYPE: AUTOTRANS CLS TRANS
S1 CONFIGURATION\STARTER\CHANGE OVER TIME: 1 to 125 sec.
S1 CONFIGURATION\STARTER\CONTACTOR SEQUENCE; 1S-2S, 2S-1S
S1 CONFIGURATION\STARTER\STARTS PER HOUR: 1 to 40
S3 PROCESS\PROGRAMMABLE INPUTS\INTERLOCK INPUT 10:
AUTOTRANS 2S CONTACT
S4 CONTROL\AUX RELAY 1 CONFIG\AUX RELAY 1 FUNCTION: AUTOTRANSFORMER 2S

GE MOTOR MANAGER 2 Specifications

General

Brand	GE
Model	MOTOR MANAGER 2
Category	Controller
Language	English