Eaton PowerXL DC1, Manual

Page: 41 / 194

2 Engineering
2.4 EMC compliance
DC1 Frequency Inverter 10/12 MN04020003Z-EN www.eaton.com
37
A declaration of conformity (CE) refers always to a “typical“ power magnet
system (PDS). The responsibility to comply with the legally stipulated limit
values and thus the provision of electromagnetic compatibility is ultimately
the responsibility of the end user or system operator. Measures must be
taken to remove or minimize emission in the associated environment
(
￫ Figure 11). He must also utilize means to increase the interference
immunity of the devices of the system.
With their high interference immunity up to category C3, DC1 frequency
inverters are ideal for use in harsh industrial networks (2nd environment).
The DC1…-F… version (with integrated RFI filter) makes it possible to com-
ply with the stringent limit values for conducted emission for category C1 in
the 1st environment. This requires a correct EMC installation (
￫ Page 58)
and the observance of the permissible motor cable lengths and the maxi-
mum switching frequency (f
PWM
) of the inverter.
In the case of frequency inverters without an internal radio interference sup-
pression filter, longer motor cable lengths and lower leakage currents can
sometimes be achieved for the individual categories by using a dedicated
external radio interference suppression filter.
The required EMC measures should be taken into account in the engineering
phase. Improvements and modifications during mounting and installation or
even at the installation site involve additional and even considerably higher
costs.
Figure 11: EMC environment and categories
1
st
environment 1
st
or 2
nd
environment 2
nd
environment
Public medium-voltage grid
Category C1
Category C2
Category C1/C2 Category C1/C2
Category C3/C4 Category C3/C4
PCC
Public
low-voltage grid
Privat
grid Industrial
grid