Medium Voltage Application Guide
Medium Voltage Application Guide
Medium Voltage Application Guide
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11083.B<br />
11082.B<br />
SOFT STARTERS<br />
Power Circuit Configuration (with Contactors)<br />
MVX power circuit with fused main contactor and bypass contactor.<br />
K2<br />
1<br />
K1<br />
CT1-3<br />
A1<br />
L1<br />
T1<br />
T1<br />
L2<br />
L3<br />
T2<br />
T3<br />
T2<br />
T3<br />
3<br />
M<br />
2<br />
U1<br />
Q3<br />
A3<br />
1<br />
2<br />
3<br />
3<br />
A1 Phase cassette L1-L3 Input power terminals (supply side)<br />
1 3 Phase 50/60 Hz Supply 2 Motor<br />
K1 Main contactor (fused/ withdrawable) Q3 Earth switch<br />
K2 Bypass contactor (fixed) T1-T3 Output power terminals (motor side)<br />
CT1-3 Current transformers (x3) A3 Power interface PCB<br />
U1 Metal oxide varistors (MOVs) 3 Current transformer inputs<br />
Power Circuit Configuration (with Circuit Breakers)<br />
MVX power circuit with main circuit breaker and bypass circuit breaker.<br />
1<br />
Q1<br />
CT1-3<br />
A1<br />
L1<br />
T1<br />
T1<br />
L2<br />
L3<br />
T2<br />
T3<br />
T2<br />
T3<br />
3<br />
M<br />
2<br />
U1<br />
Q3<br />
4<br />
A3<br />
1<br />
2<br />
3<br />
3<br />
A1 Phase cassette 2 Motor<br />
1 3 Phase 50/60 Hz Supply Q3 Earth switch<br />
Q1 Main circuit breaker (withdrawable) T1-T3 Output power terminals (motor side)<br />
Q2 Bypass circuit breaker (fixed) A3 Power interface PCB<br />
CT1-3 Current transformers (x3) 3 Current transformer inputs<br />
U1 Metal oxide varistors (MOVs) 4 Motor protection relay (MPR)<br />
L1-L3 Input power terminals (supply side)<br />
Page 38 <strong>Medium</strong> <strong>Voltage</strong> <strong>Application</strong> <strong>Guide</strong> 710-12280-00A
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