GE MOTOR MANAGER 2 - 9.4 SLIP RING STARTER

GE Power Management
MM2 Motor Manager 2 9-11
9 STARTER TYPES 9.4 SLIP RING STARTER
9
9.4 SLIP RING STARTER 9.4.1 DESCRIPTION
The slip ring starter is a secondary resistance starter used with wound rotor motors. When the start
button is pressed, the S coil is picked up and seals itself in. The motor is now starting at a reduced
current with the secondary resistors in circuit. Timing relay TR is also picked up and closes after a
set time period, shorting out the resistors in the motor windings. Pressing the stop button drops out
the S and R contactors and the motor stops.
Figure 9–9: ELEMENTARY SLIP RING MAGNETIC STARTER
To program the MM2 for slip-ring starter, set:
S1 CONFIGURATION\STARTER\STARTER TYPE: SLIP RING
S1 CONFIGUARATION\STAGE ONE SHORTING TIME: 1 to 125 sec.
The STAGE ONE SHORTING TIME setpoint appears when the STARTER TYPE has been selected as SLIP
RING. It represents the time delay from the closure of Contactor A until the closure of Contactor B.