Current-Carrying Capacity And Derating Factors For Power Cables And Signal Cables - Siemens Sinamics S120 Manual

6.6.2 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 below 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 ambient temperatures"
table.
Table 6- 3
B1
B2
C
Table 6- 4
Cross-section
mm
Signal cables
0.20
0.50
0.75
Power cables
0.75
1.00
1.50
2.50
4
6
10
Table 6- 5
Ambient air temperature [° C]
30
35
40
45
50
55
60
Power Units in Booksize C/D-Type Format
Manual, 01/2017, 6SL3097-4AC20-0BP1
Routing types
Cables in conduits or cable ducts
Multi-conductor cables in conduits or cable ducts
Cables along walls, without conduits or cable ducts
Current carrying capacity according to EN 60204-1 for 40° C ambient temperature
2
Derating factors for deviating ambient temperatures
Current carrying capacity, effective; AC 50/60 Hz or DC
For routing type
B1 B2
A A
– 4.3
– 7.5
– 9
8.6 8.5
10.3 10.1
13.5 13.1
18.3 17.4
24 23
31 30
44 40
Derating factor according to EN 60204-1, Table D1
1.15
1.08
1.00
0.91
0.82
0.71
0.58
Cabinet design
6.6 Connection system
C
A
4.4
7.5
9.5
9.8
11.7
15.2
21
28
36
50
103