Locations Of The Emc-Jumpers In Frames Fs4 To Fs6 - Johnson Controls VSD II Series Installation Manual

Installation in Corner-Grounded Network
Corner grounding is allowed for the drive types rating from
72–310A at 380–480V supply and from 75–310A at
208–240V supply.
In these circumstances the EMC protection class must be
changed to level C4 following the instructions below.
Corner grounding is not allowed for the drive types with
rating from 3.4–6A at 380–480V supply and 3.7–62A with
208–240V supply.

Locations of the EMC-Jumpers in Frames FS4 to FS6

FS4
Installation in IT System
If your supply network is an IT (impedance-grounded) system
but your AC drive is EMC-protected according to class C2
you need to modify the EMC protection of the AC drive to
EMC level C4. This is done by removing the built-in EMC
jumpers with a simple procedure described below:
Do not perform any modifications on the AC drive when
it is connected to mains.
Frames FS4 to FS6
Remove the main cover of the AC drive (see figure below)
and locate the jumpers connecting the built-in RFI-filters to
ground. See figure below.
FS5
VSD Series II LIT-12011772—October 2012 www.johnsoncontrols.com
Installation Requirements
WARNING
FS6
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