Siemens SINAMICS PM240-2, Hardware Installation Manual

Page: 44 / 144

Connecting-up
5.1 Permissible line supplies
Power Module PM240-2
44
Hardware Installation Manual, 01/2017, A5E33294624B AE
5.1 Permissible line supplies
The converter is designed for the following line supplies according to IEC 60364-1 (2005).
● N system
● TT system
● IT system
General requirements on line supply
The plant builder or machine manufacturer must ensure for operation with rated current I
rated
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.
Restrictions for special ambient conditions (Page 93)
5.1.1 TN line system
A TN line system transfers the PE protective
conductor to the installed plant or system
using 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
conductor N and the PE protective conductor
either 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.