MOTORS FOR HEAVY ELECTRICAL VEHICLES
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4.5.1. Connection of power supply
Make sure that the traction motor is disconnected from power supply prior to connection or
disconnecting the power supply connectors. Installing power voltage at U-V-W will rotate traction motor
clockwise, facing traction motor shaft from D-end.
Make sure that all cable connections are installed in appropriate way and suitable for high frequency
currents. There are three power connectors for each phase (U, V, W). All nine power connectors must be
connected to power cables when setting the power supply to ON. See “Power connectors”, “U”, “V” and
“W” in Figure 9.
NOTE: Ensure that the motor is disconnected from power supply prior to connecting or
disconnecting the high voltage power connectors.
NOTE: The power supply connectors within a phase are not unique and can be connected to any
matching phase on the inverter.
The type of mating power connectors can be straight or right-angled (90°), see Figure 10. It is
recommended that the power supply cables are supported by cable cleats or similar in order to reduce
the stress at the connectors.
Figure 10. Example of typical cable arrangement.
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