Bison HHBD01SK-01 Operating And Maintenance Manual page 7

Dual Voltage Adjustment:
All hoists come with the option of using either 460v or 230v power supply. The default voltage on all hoists is 460v.
This can be adjusted as follows:
1. Transformer Connection: The transformer like the hoist is wired as standard from the factory for an incoming
power supply of 460v.The Red wire (0V) of the transformer is connected to T2 of the reversing contactor. The
Blue wire (460V) is connected to T3 of the same reversing contactor.
If the incoming power supply is changed to 230v then the Yellow wire of the transformer (230V) should be
connected to T3 of the reversing contactor. The Blue wire (460V) must be disconnected from T3 and well
insulated. Ensure the cable is insulated in a manner that will not allow it to float around in the panel.
2. Motor Connection: The Hoist motor is wired as standard from the factory for an incoming power supply of 460v.
There are 6 wires from the motor Labelled U1; V1; W1; W2; U2; V2. The standard 460v connection is
W2/U2/V2 are joined together and U1/V1/W1 are connected to T1/T2/T3 of the reversing contactor. For 230v
main incoming supply voltage then a parallel connection of the wires is required as follows: W2&U1 connect to
T1-U2&V1 connect to T2-V2&W1 connect to T3.
7