Eaton PowerXL DC1, Руководство пользователя

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3 Installation
3.3 EMC installation
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DC1 Frequency Inverter 10/12 MN04020003Z-EN www.eaton.com
3.3.2.2 Motor earthing
The motor earth must be connected to one of the earthing terminals on the
frequency inverter and to a neighboring steel element in the building (beam,
ceiling joist), an earth electrode in the ground, or a mains earth bus.
3.3.2.3 Earth-fault protection
A fault current to earth can be produced by frequency inverters due to their
system characteristics. DC1 series frequency inverters have been designed
in such a way that the smallest possible fault current will be produced in
compliance with standards applicable worldwide. This fault current must be
monitored by a residual current device (RCD, type B).
3.3.3 EMC screw
Figure 34: EMC and VAR screws in a DC1 frequency inverter
with protection type IP20
Due to their system characteristics, frequency inverters with an internal EMC
filter will produce a larger fault current to earth than devices without a filter.
For applications in which this larger leakage current may cause malfunction
messages or disconnections (residual current device), the EMC filter’s inter-
nal protective earth can be disconnected (remove the EMC screw to do this).
Local EMC regulations must be taken into account when doing so. If neces-
sary, a specific low-leakage-current EMC filter must be connected upstream.
In connections to isolated power sources (IT networks), the EMC screw
should be removed. The earth fault monitors required for IT networks must
be suitable for operation with power electronic devices (IEC 61557-8).
NOTICE
The screw labeled EMC must not be manipulated as long as the
frequency inverter is connected to the mains.
￫
The EMC screw galvanically connects the EMC filter’s capaci-
tors to earth. The screw must be screwed in all the way to the
stop (factory setting) in order for the frequency inverter to com-
ply with the EMC standard.
VAR
EMC
EMC
L3
U
L2/N
L1/L
VAR
PH1
M3
20 mm
(0.79")
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