For Most 12 Lead Motors

If used on a standard across the line starter, soft start or variable frequency drive, these motors should be wired in the delta (RUN) connection for either high voltage (480V) or low voltage (240V). The only time you should use the wye connection is a wye-delta starter. The final connection of the motor is ultimately the responsibility of the installing electrician. If he has any questions, he should contact his nearest motor specialist prior to energization.


NEMA Standard Diagram for 12 Lead Motors

DUAL VOLTAGE
WYE-CONNECTED START
DELTA-CONNECTED RUN

VOLTAGE
CONN.
L1
L2
L3
JOIN
HIGH
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
LOW
WYE
1,7
2,8
3,9
4&5&6,10&11&12
DELTA
1,6,7,122,4,8,103,5,9,11
---


 

NEMA Standard Diagram for 6 Lead Motors


SINGLE VOLTAGE
EXTERNAL
Y-CONNECTION

L1
L2
L3
JOIN
1
2
3
4&5&6

SINGLE VOLTAGE
EXTERNAL
DELTA-CONNECTION

L1
L2
L3
JOIN
1,6
2,4
3,5
4&5&6



 

SINGLE AND DUAL VOLTAGE
STAR-DELTA CONNECTIONS

SINGLE VOLTAGE
Y-CONNECTED START
DELTA CONNECTED RUN
DUAL VOLTAGE
Y-DELTA-CONNECTED
(VOLTAGE RATIO 1.732 to 1)

CONN.
 
L1
L2
L3
JOIN
Y
START OR HIGH VOLTAGE
1
2
3
4&5&6
DELTA
RUN OR LOW VOLTAGE
1, 6
2,4
3,5
--- ---


NEMA Standard Diagram for 9 Lead Motors


DUALVOLTAGE
Y-CONNECTED

VOLTAGE
L1
L2
L3
JOIN
LOW
1,7
2,8
3,9
4&5&6
HIGH
1,6
2,4
3,5
--- ---


     


 

 

DUALVOLTAGE
DELTA-CONNECTED

VOLTAGE
L1
L2
L3
JOIN
LOW
1,6,7
2,4,8
3,5,9
--- ---
HIGH
1
2
3
4&7. 5&8, 6&9

   

 

 

 

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