Connection Overview; Length Of Motor Cable - Siemens Sinamics PM250 Hardware Installation Manual

Connection
5.1 Line and motor connection
5.1.3

Connection overview

Note
Line filter
The inverters are available with or without integrated line filter (Class A). There are external
filters (Class B) for increased EMC requirements for frame size FSC. See Line filter
(Page 71)
5.1.4

Length of motor cable

Always dimension the motor cable so that the ohmic losses are less than 5 % of the inverter
power rating.
The permissible length of the motor cable also depends on the quality of the motor cable and
the inverter pulse frequency. The values specified below are applicable for high quality
cables, such as CY100 or similar, and for the pulse frequencies (Page 58) set in the factory.
If you set other pulse frequencies, then you must ensure that the EMC category is complied
with on the plant or system side.
Table 5- 1
Inverter with integrated filter and shielded cable
First environment /
second environ-
EMC Category C2
When using the inverter in the first environment, carefully observe the information in Section
Electromagnetic compatibility of the inverter (Page 63)
34
Permissible motor cable length in m
Second environ-
ment, EMC category
ment, C3
25 25
Inverter without filter, no EMC
category
No EMC category Shielded cable
50
Hardware Installation Manual, 01/2016, A5E36265179B-AA
Unshielded
cable
50 100
PM250 Power Module