Autotransformer Closed Transition Starter - GE Multilin MM3 Motor Manager 3 Instruction Manual

STARTER TYPES
2–26
Figure 2-21: Elementary Autotransformer Closed Transition Magnetic Starter
To program the MM3 Motor Manager 3 for autotransformer closed transition starter, set:
S1 CONFIGURATION
S1 CONFIGURATION
S1 CONFIGURATION
S1 CONFIGURATION
S3 PROCESS PROGRAMMABLE INPUTS
Contact
S4 CONTROL AUX 1 RELAY CONFIG
The CONTACTOR SEQUENCE
type has been selected. The 1S-2S value means that the 1S contactor will close ahead of
the 2S contactor as per some wiring practices. The 2S-1S value means that the 2S
contactor will close ahead of the 1S contactor as this is another common wiring practice.
The CHANGE OVER TIME setpoint appears only if the autotransformer open or closed
transition starter types have been selected. For the autotransformer starter type, this is the
time delay from the closure of contactor A output relay until the opening of contactor A
output relay. The STARTS PER HOUR
been selected. This setpoint limits the number of starts per hour to prevent overheating of
the autotransformer windings.
Start (CONTACTOR SEQUENCE
1. Start command received by the MM3 Motor Manager 3 (serial, switch input or
faceplate).
2. Close and maintain Contactor A output relay – close 1S contactor.
3. Wait 20 ms, close and maintain auxiliary 1 relay; power is applied to the
autotransformer.
STARTER STARTER TYPE
STARTER CHANGE OVER TIME
STARTER CONTACTOR SEQUENCE
STARTER STARTS PER HOUR
INTERLOCK INPUT
AUX RELAY 1
appears when the autotransformer closed transition starter
setpoint only if the autotransformer starter type has
set to 1S-2S) sequence:
MM3 MOTOR MANAGER 3 – INSTRUCTION MANUAL
CHAPTER 2: INSTALLATION
: AUTOTRANS CLS TRANS
: 1 to 125 sec.
: 1S-2S, 2S-1S
: 1 to 40
10: Autotrans 2S
FUNCTION: Autotransformer 2S