Current-Carrying Capacity And Derating Factors For Power Cables And Signal Cables - Siemens SINAMICS S120 Combi Equipment Manual

Cabinet design and EMC
12.7 Cable shielding and routing
12.7.5 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 routing
types 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- 11 Current-carrying capacity according to EN 60204-1 for 40°C ambient temperature
Cross section
mm
Electronics
0.20
0.50
0.75
Power
0.75
1.00
1.50
2.50
4
6
10
16
Installation types
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- 12 Derating factors for deviating conditions
Ambient temperature [°C]
30
35
40
45
50
55
60
260
Current-carrying capacity, effective; AC 50/60 Hz or DC
for routing type
B1
2
A
–
–
–
8.6
10.3
13.5
18.3
24
31
44
59
B2
A
4.3
7.5
9
8.5
10.1
13.1
17.4
23
30
40
54
Derating factor according to EN 60204-1 Table D1
1.15
1.08
1.00
0.91
0.82
0.71
0.58
C
A
4.4
7.5
9.5
9.8
11.7
15.2
21
28
36
50
66
SINAMICS S120 Combi
Manual, Edition 05.2010, 6SL3097-4AV00-0BP0