Electrical Power Network; Mains Terminal And Configuration - Eaton PowerXL DC1 20 Series Installation Manual

2.2 Electrical power network

2.2.1 Mains terminal and configuration

DC1 variable frequency drives can be connected to and run on all neutral
point-grounded AC supply systems (TN-S, TN-C, TT grounding systems;
please refer to IEC 60364) without any limitations.
L1
L2
L3
N
PE
TN-S
Figure 14: AC supply systems with earthed center point
￫
While planning the project, consider a symmetrical distribution
to the three main phase conductors, if multiple variable
frequency drives with single-phase supplies are to be
connected.The total current of all single phase consumers is not
to cause an overload of the neutral conductor (N-conductor).
The connection and operation of variable frequency drives to asymmetrically
grounded TN networks (phase-grounded delta network "Grounded Delta",
USA) or non-grounded or high-resistance grounded (over 30 Ω) IT networks is
only conditionally permissible (internal radio interference suppression filters).
￫
Operation on non-earthed networks (IT) requires the use of
suitable insulation monitoring relays (e.g. pulse-code
measurement method)
￫
In networks with an earthed phase conductor, the maximum
phase-earth voltage must not exceed 300 V AC.
DC1-...-A20CE1 variable frequency drives can be connected to corner-
grounded systems or IT grounding systems (not grounded, insulated).
When versions featuring an internal radio interference suppression filter
(DC1-...FN-A20CE1, DC1-...FB-A20CE1) are connected to one of these
systems, the EMC screw(s) needs to be removed and the internal radio
interference suppression filter needs to be disconnected
￫
Measures for electromagnetic compatibility are mandatory in a
power drive system, to meet the legal standards for EMC- and
Low Voltage Directive.
Good earthing measures are a prerequisite for the effective use
of further measures such as screen earth kit or filters here.
Without respective grounding measures, further steps are
superfluous.
DC1...20... and DC1...OE1 Variable Frequency Drives 02/20 MN040059EN www.eaton.com
2.2 Electrical power network
L1
L2
L3
PEN
TN-C
2 Engineering
L1
L2
L3
N
TT
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