|
Terminal Markings and
Connections
Three-Phase Motors-Two Speed Single Winding
NEMA Nomenclature - 6
Leads
|
Constant
Torque Connection
Low-speed horsepower is half of high-speed horsepower.*
|
|
| Speed |
L1 |
L2 |
L3 |
|
Typical
Connection |
| High |
6 |
4 |
5 |
1 & 2
& 3 Join |
2 WYE |
| Low |
1 |
2 |
3 |
4-5-6
Open |
1 DELTA |
|
|
|
|
Variable Torque
Connection
Low-speed horsepower is one-fourth
of high-speed horsepower.*
|
|
| Speed |
L1 |
L2 |
L3 |
|
Typical
Connection |
| High |
6 |
4 |
5 |
1 &
2 & 3 Join |
2 WYE |
| Low |
1 |
2 |
3 |
4-5-6
Open |
1 DELTA |
|
|
|
|
Constant Horsepower
Connection
Horsepower is the same at both speeds.
|
|
| Speed |
L1 |
L2 |
L3 |
|
Typical
Connection |
| High |
6 |
4 |
5 |
1-2-3 Open |
2 DELTA |
| Low |
1 |
2 |
3 |
4 & |
1 |
*CAUTION: On European motors
horsepower variance with speed may not be the same as shown above.
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Terminal Markings and
Connections
Three-Phase Motors-Two Speed, Single
Winding
IEC Nomenclature - 6 Leads
|
Constant Torque Connection
|
|
| Speed |
L1 |
L2 |
L3 |
|
Typical
Connection |
| High |
2W |
2U |
2V |
1U & 1V & 1W Join |
2 |
| Low |
1 |
1V |
1W |
2U-2V-2W
Open |
1 |
|
|
|
|
Variable Torque
Connection
|
|
| Speed |
L1 |
L2 |
L3 |
|
Typical
Connection |
| High |
2W |
2U |
2V |
1U & 1V & 1W Join |
2 |
| Low |
1 |
1V |
1W |
2U-2V-2W
Open |
1 |
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|
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