3 Installation
3.5 EMC installation
DC1 Variable Frequency Drive
04/16 MN04020003Z-EN
www.eaton.com
69
3.5.2.3 Earth-fault protection
A fault current to earth can be produced by variable frequency drives due to
their system characteristics. DC1 series variable frequency drives have been
designed in such a way that the smallest possible fault current will be
produced in compliance with standards applicable worldwide. In the case of
devices powered with a three-phase supply (DC1-3…), this fault current
must be monitored by an AC/DC-sensitive type B residual current device
(RCD).
3.5.3 Internal filters (EMC and VAR screws)
FS1 to FS3 DC1 variable frequency drives with an IP20 degree of protection
feature two screws on the left side that are labeled EMC and VAR.
Figure 36: EMC and VAR screw
In the case of units with a frame size of FS4, there will be two screws
labeled EMC: one next to the main terminals and another one next to the
motor terminals.
Figure 37: Two EMC screws on devices with a frame size of FS4
EMC
L3
U
L2/N
L1/L
VAR
PH1
M3
20 mm
(0.79")
EMC
VAR
1
2
3
4
5 6 7 8 9 10 11
U
DC+
EMC
BR DC-
V W
L1
EMC
L2 L3
⏚
DC+
BR
DC-
EMC
L1
L3
L2
W
V
U
⏚
EMC
PH2
M4
10 mm
2 x
≧ 40 mm
(≧ 1.57")
