Siemens SINAMICS G120P, Руководство по установке оборудования

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Connecting
4.1 Power distribution systems
PM230 Power Module IP55
38
Hardware Installation Manual, 11/2014, A5E35319202B AA
4.1 Power distribution systems
Overview of Power Distribution Systems
The power distribution systems described below, as defined in EN 60950 , have been
considered in the design of the inverter. In the next figures three phase systems are outlined.
The three phase inverter must be connected to L1, L2 and L3. PE must always be
connected. The inverter operates with most supply systems.
Table 4- 1 Power distribution systems
TN-S Power System TN-C-S Power System TN-C Power System TT Power System IT Power System
A TN-S power system
has separate neutral
and protective ground
conductors throughout
the system.
In a TN-C-S power
system, the neutral
and protective func-
tions are combined in
a single part of the
system.
In a TN-C power sys-
tem, the neutral and
protective functions
are combined in a
single conductor
throughout the system.
A TT power system
has one point directly
grounded, the ex-
posed conductive
parts of the installation
being connected to a
ground, which is elec-
trically independent of
the ground of the
power system.
An IT power system
has no direct connec-
tion to ground - in-
stead the exposed
parts of the electrical
installation are
grounded.
Note
To ensure compliance for Class 1 protection in accordance with the EN 61140 directive, the
input and output line voltage supplies must be earthed.
4.2 Operation only with grounded (TN) supplies
Operation only with grounded (TN) supplies
The SINAMICS PM230 Power Modules have integrated filters and therefore cannot be used
in conjunction with IT or TT supplies.
Operation of the Power Modules without a protective earth is not permitted under any
circumstances.