Length Of Motor Cable; Inverter Terminals - Siemens SINAMICS G120 Hardware Installation Manual

5.2.2

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 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.
EMC-compliant wiring is required in order that the inverter complies with the EMC category
listed in the following table.
Carefully observe the following section for operation in the first environment:
Table 5-1
Inverter
Frame sizes FSD/FSE
400 V
690 V
Frame size FSF
400 V
690 V
5.2.3

Inverter terminals

Table 5-2 Connection, cross-section and tightening torque for PM240P-2 Power Modules
Inverters
FSD Line supply,
motor
FSE
FSF Line supply,
motor
PM240P-2 Power Modules
Hardware Installation Manual, 11/2016, A5E37800827C AB
Pulse frequencies (Page 73).
EMC-compliant installation of a machine the system (Page 23)
Electromagnetic compatibility of variable-speed drives (Page 77)
Permissible length of motor connecting cables
Inverter with filter, category
C2
EMC category
Second Envi‐
ronment, C2
Shielded
150 m
100 m
150 m
---
Connection
Screw-type termi‐ 10 ... 35 mm
nal
25 ... 70 mm
35 ... 2 × 120 mm
22 ... 25 Nm
Cable lug accord‐
ing to SN71322
5.2 Connecting the line and motor cable at the inverter
Second envi‐ without output reactor
ronment, C3
Shielded Shielded
150 m 200 m
100 m 200 m
150 m 300 m
150 m 300 m
Cross-section, tightening torque
Metric
, 2.5 ... 4.5 Nm
2
, 8 ... 10 Nm
2
,
2
Inverter without filter
No EMC category
with two output reactors in
series
Unshielded Shielded
300 m 350 m
300 m 350 m
450 m 525 m
450 m 525 m
Imperial
20 ... 10 AWG, 22 lbf in
8 ... 2 AWG, 40 lbf in
6 ... 3/0 AWG, 88.5 lbf in
1 ... 2 × 4/0 AWG, 210 lbf in --
Connecting-up
Unshielded
525 m
525 m
800 m
800 m
Stripped
insulation
length
18 mm
25 mm
47