Table 6-6 Maximum voltage peaks at the motor terminals for motors specically designed for converter operation
Rated motor voltage
V
Maximum peak voltage at the motor terminals
Û
phase-to-phase
V
pk
Û
phase-to-ground
V
pk
DC link U
DC
V
≤ 500V 1600 1400 750
> 500V to 690V 2200 1500 1080
Depending on the step height, the voltage rise times for the individual voltage steps in the
line-to-ground voltage at the motor end of the cable must not fall below the following values.
Table 6-7 Rise times as a function of voltage level
Step height
V
Minimum rise time t
r
ns
900 100
1050 200
1260 400
6.8 Final checks
Before closing the terminal box/terminal base of the machine enclosure, check the following:
• Establish the electrical connections in the terminal box in accordance with the information
in this documentation.
• Maintain the air clearances between non-insulated parts as described in Chapter Minimum
air clearances. (Page70)
• Avoid protruding wire ends.
• In order not to damage the cable insulation, freely arrange the connecting cables.
• Connect the machine corresponding to the specied direction of rotation.
• Keep the inside of the terminal box clean and free from trimmed-o ends of wire.
• Ensure that all seals and sealing surfaces are undamaged and clean.
• Correctly and professionally close unused openings in the terminal boxes. Observe the
information in this documentation.
• Observe the information on torques in this documentation.
Electrical connection
6.8Final checks
1LE5, 1PC4 shaft heights 280 ... 355
Operating Instructions, 11/2022, A5E41454666A 77
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