Permissible Line Supplies; Tn Line System - Siemens SINAMICS G120 Hardware Installation Manual

Connecting-up

5.1 Permissible line supplies

5.1 Permissible line supplies
Restrictions for installation altitudes above 2000 m
Above an installation altitude of 2000 m, the permissible line supplies are restricted.
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
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.
40
Restrictions for special ambient conditions (Page 74)
Hardware Installation Manual, 11/2016, A5E37800827C AB
rated
PM240P-2 Power Modules