GFK-3111A
PACMotion VFD AC Variable Speed Drive User Guide
89
Internal EMC Filter and Varistors – Disconnection Procedure
IP20 Drive Models
All PACMotion VFD models provide a simple method to disconnect the internal EMC filter and surge
protection varistors by fully removing the screws shown below. This should only be carried out where
necessary, for example in cases such as IT or ungrounded supplies, where the phase to ground voltage can
exceed the phase to phase voltage.
The EMC filter disconnect screw is labelled “EMC”.
The surge protection varistors disconnect screw is clearly labelled “VAR”.
Figure 32: Frame Sizes 2 & 3
Figure 33: Frame Size 4
The EMC Filter and
Varistor disconnect
screws are located
on the left side of
the product when
viewed from the
front. Remove both
screws completely.
Frame Size 4 units
have EMC Filter
disconnection points
only located on the
front face of the unit
as shown.
EMC L1 L2 L3
Figure 34: Frame Size 5
Figure 35: Frame Size 6A/6B
Frame Size 5 units
have EMC Filter
disconnection points
only located on the
front face of the unit as
shown.
Frame Size 6A/6B
units have EMC Filter
disconnection points
only located on the
front face of the unit
as shown.
IP55 & IP66 Models
These models require disassembly in order to disconnect the EMC filter. Disconnection should be carried out
only by Emerson Approved Service Partners.
