Electrical installation
4.5 Connections
Cabinet Modules NEMA
88 Manual, 04/2014, A5E03586450A
Property damage due to loose power connections
Insufficient tightening torques or vibrations can result in faulty electrical connections.
This can cause fire damage or malfunctions.
• Tighten all power connections with the specified tightening torques, e.g. power
connection, motor connection, and DC link connections.
• Regularly check all power connections by retightening them with the prescribed
tightening torque. This applies in particular after transport.
5. Secure the motor cables on the cable propping bar to avoid placing mechanical strain on
the terminals.
6. When shielded motor cables are used, the shields must be secured to the EMC shield
bus (option M70) in an EMC-compliant manner.
Note
PE connection of the motor
The PE connection on the motor must be guided back directly to the cabinet unit and
connected there.
Refer to the "Technical specifications" for the Motor Modules, "Cabinet Modules" section for
the maximum conductor cross-sections.
Direction of motor rotation
IEC 60034-7 defines the two ends of an electric motor as follows:
● DE (Drive End): Usually the drive end of the motor
● NDE (Non-Drive End): Usually the non-drive end of the motor
An electric motor is rotating clockwise if the shaft is turning clockwise when looking at the
drive end (DE).
For electric motors with 2 shaft ends, the direction of rotation must be determined based on
the shaft end specified as the drive end.
For clockwise rotation, the electric motor must be connected according to the following table.
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