GE MOTOR MANAGER 2 User Manual

9-32 MM2 Motor Manager 2
GE Power Management
9.11 WYE-DELTA CLOSED TRANSITION STARTER 9 STARTER TYPES
9
9.11 WYE-DELTA CLOSED TRANSITION STARTER 9.11.1 DESCRIPTION
This starter type is a reduced voltage starter. When the start button is pressed timing relay TR is
picked up and sealed in. The 1S coil is picked up which in turn picks up the 1M coil which seals itself
in. When timing relay TR times out the 2S coil is picked up which then drops out the 1S coil. The 2M
coil now picks up and the 2S coil is dropped out. The motor is now running in a delta configuration.
Figure 9–22: ELEMENTARY WYE-DELTA CLOSED TRANSITION MAGENTIC STARTER
To program the MM2 for wye-delta closed transition starter, set:
S1 CONFIGURATION\STARTER\STARTER TYPE: WYE DELTA CLS TRANS
S1 CONFIGURATION\STARTER\CHANGE OVER CURRENT: 1.0 to 5.0 x FLC
S1 CONFIGURATION\STARTER\CHANGE OVER TIME: 1 to 125 sec.
S3 PROCESS\PROGRAMMABLE INPUTS\INTERLOCK INPUT 10: WYE DELTA 2S CONTACT
S3 PROCESS\PROGRAMMABLE INPUTS\INTERLOCK INPUT 9: WYE DELTA 1M CONTACT
S4 CONTROL\AUX RELAY 1 CONFIG\AUX RELAY 1 FUNCTION: WYE DELTA CLS TRANS
The CHANGE OVER CURRENT setpoint appears only if either of the Wye Delta starter types have been
selected. Before the CHANGE OVER CURRENT setpoint comes into effect on a Wye delta start, a mini-
mum of 25% of the CHANGE OVER TIME setpoint must have expired. After 25% of the time has expired
and the average of the three phase currents has dropped below the CHANGE OVER CURRENT value,
the transition from Wye (Contactor A) to delta (Contactor B) will occur. If this Setpoint is set to OFF,
100% of the CHANGE OVER TIME must expire before the Wye to delta transition will occur.

GE MOTOR MANAGER 2 Specifications

General

Brand	GE
Model	MOTOR MANAGER 2
Category	Controller
Language	English