Three−Phase Ac Motor Operation On A Frequency Inverter; Emc−Compliant Wiring - Lenze M MA Series Operating Instructions Manual

6 Electrical installation
Three−phase AC motor operation on a frequency inverter
6.2 Three−phase AC motor operation on a frequency inverter
The three−phase AC motors described in these instructions are optimised and
qualified for the use on Lenze frequency inverters and can be combined without
restrictions.
If another inverter is used for operation, the voltage peaks (U
diagram must not be exceeded with the given rise time (t
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
0.1
0.2 0.3
m
t r ( s)
Fig. 2 Permissible voltage peaks for operation on the frequency inverter
IEC/TS 60034−25:2007 (complies with IVIC C/B/B @500 V)
Lenze Standard A+
Possible countermeasures
Appropriate countermeasures must be taken if exceedance of the permissible voltage
peaks cannot be ruled out:
¯ Reduce the DC−bus voltage (brake chopper threshold voltage);
¯ Use filters, chokes;
¯ Use of special motor cables.
6.3 EMC−compliant wiring
The EMC−compliant wiring of the motors is described in detail in the Operating
Instructions for the Lenze controllers.
¯ Use of metal EMC cable glands with shield connection.
¯ Connect the shielding to the motor and to the device.
28
1.56 kV
0.5 0.6
0.4 0.7 0.8
) shown in the
pk
).
R
0.9 1.0 1.1 1.2
MT−m500−001.des
Lenze ¯ BA 33.0005 ¯ 5.0