BOCK UL-HGX66e/1340 ML 31 Assembly Instructions Manual page 15

5| Electrical connection
The motor is wired for direct start (YY) at the factory. For part winding start Y/YY the bridges must
be removed and the motor feed line connected according to the circuit diagram:
400 V
460 V
Direktstart YY Teilwicklungsstart Y/YY
Direct start YY
Part winding start Y/YY
2U1 2V1 2W1
1U1 1V1 1W1
L1 L2 L3
Failure to do this results in opposed rotary fields and results in
damage to the motor. After the motor starts up via partial winding
1, partial winding 2 must be switched on after a maximum delay
of one second. Failure to comply can adversely affect the service
life of the motor.
L1 L2 L3
2U1 2V1 2W1
1U1 1V1 1W1
L1 L2 L3
US
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