Connecting
4.1 Permissible line supplies
Power Module PM240-2
52
Hardware Installation Manual, 01/2020, A5E33294624B AL
Description
In unfavorable cases, the harmonic currents of several converters in the neutral conductor
(N) add up to a value greater than the currents of the line conductors (L1, L2, L3). The
current carrying capacity of the neutral conductor must be sufficient for this. IEC 60364-5-
52:2019, section 524, makes recommendations for sizing the neutral conductor. If no more
precise information is available, the standard recommends dimensioning the neutral
conductor for 1.45 times the current carrying capacity of the line conductors.
CAUTION
Fire caused by neutral conductor (N) overload
The neutral conductor can heat up due to the load from harmonic currents and cause a fire.
•
Consider the harmonic currents when dimensioning the neutral conductor.
WARNING
Electric shock caused by PEN conductor overload
In TN-C supply networks, the protective function of the PEN conductor can be adversely
affected by exposure to harmonic currents.
•
Consider the harmonic currents when dimensioning the PEN conductor.
Summary of Contents for SINAMICS G120
Page 1: ...Power Module PM240 2 ...
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Page 6: ...Preface Power Module PM240 2 4 Hardware Installation Manual 01 2020 A5E33294624B AL ...
Page 10: ...Table of contents Power Module PM240 2 8 Hardware Installation Manual 01 2020 A5E33294624B AL ...
Page 118: ...Spare parts Power Module PM240 2 116 Hardware Installation Manual 01 2020 A5E33294624B AL ...
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