Dimensioning Maximum Motor Cable Length - Siemens SINAMICS G180 Installation And Operating Instructions Manual

6.6.5

Dimensioning maximum motor cable length

The maximum cable length is determined by the following factors:
● Peak voltage at the motor
● Inverter load
Table 6-5
Device type
Compact units 400 V
2T..-(0...3)5400-...
connected to line supplies up
to 400 V
Compact units 400 V
2T..-(0...3)5400-...
connected to line supplies >
400 V
Cabinet units 400 V
2T..-(7...8)(5...6)40.-...
connected to line supplies up
to 400 V
Compact units 500 V
2T..-(0...3)5500-...
Cabinet units 500 V
2T..-(7...8)(5...6)50.-...
Compact units 690 V
2T..-(0...3)5690-...
Cabinet units 690 V
2T..-(7...8)(5...6)69.-...
The data in the table specifies the typical cable length in the sense of the distance between
the motor and the inverter when parameterizing the standard clock cycle frequency. Larger
Installation and operating instructions Sinamics G180
Operating Instructions, 05/2013, 4BS0751-001
– All inverters are fitted with a du/dt filter. The filter limits the voltage increase time on the
motor to > 0.5 µs.
– A motor peak voltage of 1,560 V is maintained for the maximum cable lengths stated in
the table.
– The capacitive load of the inverter increase with increasing cable length and/or
increasing number of parallel cables.
– The configurable inverter clock frequency influences the inverter load. If you configure
the minimum possible clock frequency , the inverter load then reduces so that a larger
cable length can be connected.
Typical maximum motor cable lengths for different inverter versions
standard version
2T..-.....-.....D...
Cable type
NYCWY NYY
200 m 300 m
150 m 200 m
- -
- -
- -
150 m 200 m
100 m 140 m
Electrical connection
6.6 Motor connection
Version with strengthened du/dt
filter
2T..-.....-.....V...
Cable type
NYCWY NYY
350 m 450 m
300 m 350 m
300 m 350 m
300 m 350 m
250 m 300 m
300 m 300 m
250 m 300 m
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