Siemens SIMATIC EM 148-FC, Руководство пользователя

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Wiring
2-3
EM 148-FC Frequency Converter
A5E00065321-03
Selecting the connecting cables
The core cross-section of the connecting cables for the three outer cables must be
adapted to the prevailing environmental conditions. The core cross-section
depends on the following:
The aggregate current of all the looped-through loads
The method of cable-laying
The ambient temperature
The material type (PVC, rubber) of the motor connecting cable
Depending on the ambient temperature, the following maximum current-carrying
capacity has been calculated for PVC motor connecting cables when they are laid
in the cable duct, for example:
Cross-Sec-
tion
T
U
= 30
5
C T
U
= 40
5
C T
U
= 45
5
C T
U
= 50
5
C T
U
= 55
5
C
2.5 mm
2
19 A 16.5 A 15.0 A 13.5 A 11.6 A
4.0 mm
2
26 A 22.6 A 20.5 A 18.5 A 15.9 A
Wiring power connectors
Make sure you comply with the following rules when wiring:
Rules for flexible cables T
U
= 55
5
C T
U
= 40
5
C
The current-carrying capacity of the connectors 2.5 mm
2
20 A 25 A
depending on the connectable core
cross-sections and the ambient temperature
4.0 mm
2
30 A 35 A
Permissible outer diameter of the cable Green 7.0 ... 10.5 mm
depending on the type of seal
Red 9.0 ... 13.0 mm
White 11.5 ... 15.5 mm
Length of core stripped 8 mm
Length of cable sheath stripped 20 mm
Unused connectors
Seal off unused connectors with screw caps (3RK1 902-0AL00). Only in this way
can the IP 65 degree of protection be complied with.