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Installation and Operation Manual M125HV EU V3 EN 2021-07-12
5 Planning the installation
Planning the grid connection (AC)
5.4.7 Permissible grid voltages
3P3W
Voltage Range
L1-L2
600 V
AC
-36%/+15%
L2-L3
600 V
AC
-36%/+15%
L3-L1
600 V
AC
-36%/+15%
Table 5.1.: Permissible grid voltages
5.4.8 Selection and routing of the AC cable
5.4.8.1 AC cable gland
The AC cable feed-through is available in two versions.
Fig. 5.14: AC cable feed-through with standard AC cable gland
The standard AC cable gland is suitable for AC cables with multi-
ple conductors.
Cable diameter
33.0 to 76.8 mm
Table 5.2.:
Technical specification of the standard AC cable feed-
through with 1 AC cable gland
Fig. 5.15: Optional AC cable feed-through with four AC cable
glands
The optional AC cable glands are suitable for AC cables with a
single conductor.
Cable diameter of phase conductor
??? to ??? mm
Cable diameter of PE conductor
??? to ??? mm
Table 5.3.:
Technical specification of the optional AC cable feed-
through with four AC cable glands
5.4.8.2 Technical properties of the AC terminal block
Connection type
Screws with hexagon socket head
Type of attachment
●
Connecting bolt with M10 nut
(L1, L2, L3)
●
M10 screw (PE)
Tightening torque
●
25 Nm (L1, L2, L3, PE)
Table 5.4.:
Technical specification for the AC terminal block
5.4.8.3 Notes on calculating the cable cross-section
►
Consider the following factors when calculating the cable
cross-section:
–
Cable material
–
Temperature conditions
–
Cable length
–
Installation type
–
Voltage drop
–
Loss of power in the cable
►
Always follow the IEC 60364-5-52 requirements and your
country-specific installation instructions.
►
France: Follow the installation instructions of UTE 15-712-
1. This standard contains the requirements for minimum
cable diameters and for avoiding overheating due to high
currents.
►
Germany: Follow the installation instructions of VDE 0100-
712. This standard contains the requirements for minimum
cable diameters and for avoiding overheating due to high
currents.
