Siemens SINAMICS S120 Combi - Current-Carrying Capacity and Derating Factors for Power Cables and Signal Cables

Cabinet design and EMC
12.5 Connection system
SINAMICS S120 Combi
Manual, 11/2017, 6SL3097-4AV00-0BP7
287
12.5.3
Current-carrying capacity and derating factors for power cables and signal
cables
The current-carrying capacity of PVC/PUR-insulated copper cables is specified for laying
methods B1, B2 and C under continuous operating conditions in the table with reference to
an ambient air temperature of 40° C. For other ambient temperatures, the values must be
corrected by the factors listed in the "Derating factors for deviating conditions" table.
Table 12- 9 Current-carrying capacity according to EN 60204-1 for 40° C ambient temperature
Cross-section
Effective current-carrying capacity; AC 50/60 Hz or DC
for laying method
mm
2
B1
A
B2
A
C
A
Electronics
0.20
–
4.3
4.4
0.50 – 7.5 7.5
0.75
–
9
9.5
Power
0.75
8.6
8.5
9.8
1.00
10.3
10.1
11.7
1.50
13.5
13.1
15.2
2.50
18.3
17.4
21
4
24
23
28
6
31
30
36
10
44
40
50
16
59
54
66
Laying methods
B1 cables in conduits or installation ducts
B2 multi
-core cables in conduits or installation ducts
C cables along walls/panels without conduits and installation ducts
Table 12- 10 Derating factors for deviating conditions
Ambient temperature [° C]
Derating factor according to EN 60204-1 Table D1
30
1.15
35
1.08
40
1.00
45
0.91
50
0.82
55
0.71
60
0.58