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Terminals and Connections for Three-Phase Motors-Single Speed---6 Lead |
NEMA - 6 Leads |
Single Voltage External WYE Connection |
L1 |
3 |
2 |
L3 |
L2 |
1 |
4+5+6 |
JOIN |
Single Voltage External Delta Connection |
L1 |
L2 |
L3 |
1+6 |
3+5 |
2+4 |
NEMA - 6 Leads |
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Single and Dual Voltage WYE-DELTA Connections----6 Lead |
Single Voltage |
Start (Wye) |
L1 |
L2 |
L3 |
1 |
2 |
3 |
4+5+6 |
JOIN |
Run (Delta) |
1+6 |
2+4 |
3+5 |
----- |
Dual Voltage Based on 1.732/1 |
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Terminals and Connections for Three-Phase Motors-Single Speed---9 Lead |
JOIN |
L3 |
L2 |
L1 |
High (Wye) |
1 |
2 |
3 |
4+5+6 |
Low (Delta) |
1+6 |
2+4 |
3+5 |
----- |
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Voltage |
JOIN |
L3 |
L2 |
L1 |
High |
1 |
2 |
3 |
4+7,, 5+8,, 6+9 |
Low |
1+7 |
2+8 |
3+9 |
4+5+6 |
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Voltage |
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JOIN |
L3 |
L2 |
L1 |
High |
1 |
2 |
3 |
4+7,, 5+8,, 6+9 |
Low |
1+6+7 |
2+4+8 |
3+9+5 |
4+5+6 |
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Voltage |
Three phase Connections 3 ph Motors-Single Speed --- 12 |
JOIN |
L3 |
L2 |
L1 |
High |
1 |
2 |
3 |
4+7,, 5+8.. 6+9,, 10+11+12 |
Low |
1+7 |
2+8 |
3+9 |
4+5+6,, 10+11+12 |
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Voltage |
Dual Voltage External WYE Connection |
Dual Voltage WYE-Connected Start-----DELTA-Connected Run |
JOIN |
L3 |
L2 |
L1 |
Wye |
1 |
2 |
3 |
4+7,, 5+8.. 6+9,, 10+11+12 |
Delta |
1+12 |
2+10 |
3+11 |
4+7,, 5+8,, 6+9 |
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Connect |
High voltage |
Dual Voltage WYE-Connected Start-----DELTA-Connected Run |
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Low voltage |
JOIN |
L3 |
L2 |
L1 |
Wye |
1+7 |
2+8 |
3+9 |
4+5+6,, 10+11+12 |
Delta |
1+6+7+12 |
2+4+8+10 |
3+5+9+11 |
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Connect |
Three phase Connections 3 ph Motors-Single Speed IEC (European) 6 Leads Single and Dual Voltage WYE-DELTA Connections |
Single Voltage |
Dual Voltage Based on 1.732 : 1 |
JOIN |
T(L3) |
S(L2) |
R(L1) |
Start (Wye) |
U1 |
V1 |
W1 |
U2+V2+W2 |
Run (Delta) |
U1+W2 |
V1+U2 |
W1+V2 |
----- |
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(Wye) |
Low (Delta) |
U1 |
U1+W2 |
V1 |
V1+U2 |
W1 |
U2+V2+W2 |
W1+V2 |
----- |
JOIN |
R(L1) |
S(L2) |
T(L3) |
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Dual Voltage IEC (European) 12 Leads WYE-Connected Start DELTA-Connected Run |
High (Wye) |
Voltage |
(Delta) |
R(L1) |
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S(L2) |
T(L3) |
JOIN |
U1 |
V1 |
W1 |
U1+W6 |
V1+U6 |
W1+V6 |
U2+U5,, V2+V5.. W2+W5,, U6+V6+W6 |
U2+U5,, V2+V5.. W2+W5,, U6+V6+W6 |
High voltage |
Connect |
Connect |
Low Voltage |
(Wye) |
(Delta) |
Connect |
R(L1) |
S(L2) |
T(L3) |
JOIN |
U2+V2+W2,, U6+V6+W6 |
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U1+U5 |
U1+U5+W2+W6 |
V1+V5+U2+U6 |
W1+W5+V2+V6 |
V1+V5 |
W1+W5 |
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Sample European Connection |
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By Les McWatters |