Permissible Line Supplies; Tn Line System - Siemens SINAMICS G12 Hardware Installation Manual

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5.1 Permissible line supplies

5.1 Permissible line supplies
The converter is designed for the following line supplies according to IEC 60364-1 (2005).
● TN system
● TT system
● IT system
General requirements on line supply
The plant builder or machine manufacturer must ensure for operation with rated current I
that the voltage drop between the transformer input terminals and the inverter when operated
with its rated values is less than 4% of the transformer rated current
Restrictions for installation altitudes above 2000 m
Above an installation altitude of 2000 m, the permissible line supplies are restricted.
5.1.1

TN line system

A TN line system transfers the PE protective
conductor to the installed plant or system us‐
ing a cable.
Generally, in a TN line system the neutral
point is grounded. There are versions of a TN
system with a grounded line conductor, e.g.
with grounded L1.
A TN line system can transfer the neutral con‐
ductor N and the PE protective conductor ei‐
ther separately or combined.
Inverter operated on a TN line system
● Inverter with integrated or external line filter:
– Operation on TN line systems with grounded neutral point permissible.
– Operation on TN line systems with grounded line conductor not permissible.
● Inverter without line filter:
– Operation on all TN line systems ≤ 600 V permissible
– Operation on TN line systems > 600 V and grounded neutral point permissible.
– Operation on TN line systems > 600 V and grounded line conductor not permissible.
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Restrictions for special ambient conditions (Page 108)
Hardware Installation Manual, 08/2017, A5E33294624B AG
rated
Power Module PM240-2