Siemens 1FT7 Operating Instructions Manual page 33

Synchronous motors
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Current-carrying capacity for power and signal cables
The current-carrying capacity of PVC/PUR-insulated copper cables is specified for routing
types B1, B2, and C under continuous operation 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 from the "Derating factors" table.
Table 6- 1
Cross-section
[mm
Electronics (to EN 60204-1)
0.20
0.50
0.75
Power (to EN 60204-1)
1,50
2,50
4
6
10
16
25
35
50
70
Table 6- 2
Ambient air temperature [°C]
30
35
40
45
50
55
60
1FT7 synchronous motors
Operating Instructions, 04/2010, 610.40075.40b
Cable cross-section and current-carrying capacity
Current-carrying capacity rms; AC 50/60 Hz or DC for routing type
]
B1 [A]
2
-
-
-
13,5
18,3
24
31
44
59
77
96
117
149
Derating factors for power and signal cables
B2 [A]
4.3
7.5
9
13,1
17,4
23
30
40
54
70
86
103
130
Derating factor to EN 60204-1, table D1
1.15
1.08
1.00
0.91
0.82
0.71
0.58
Connection
6.2 Electrical connection
C [A]
4.4
7.5
9.5
15,2
21
28
36
50
66
84
104
125
160
33

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