35
Instruction Booklet
IB156002EN
Effective January 2022
Eaton HCU2/HCUn active harmonic
filter installation manual
EATON
www.eaton.com
Figure 41 . Load side CT position diagram
X1
Active Filter
Source
Load
X1
X1
L1
L2
L3
L2
L3
L1
X2
X1
X2
X1
CH1
X2
X1
OUT
X2
X1
X2
X1
CH2
X2
X1
IN
OUT
X2
X1
X2
X1
CH3
X2
X1
IN
OUT
IN
X1
X1
X2
X2
Optional 3
rd
CT
Required if there are Line-to-
Neutral connected Loads
downstream of the CTs.
Factory Installed
shorting jumpers
X1
X2
3-phase Protection
Device
Customer supplied.
Shorting
Terminal
Block
Customer
supplied.
ote:
N
The factory installed shorting jumpers must be installed.
Parallel system
Up to ten active filters can be installed in parallel for the HCU2 and
up to twelve active filters can be installed for the HCUn. If more
units in parallel are required, contact the local sales representative
for assistance prior to installation.
CT installation parallel units
WARNING
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH.
THE FACTORY PROVIDED SHORTING JUMPERS MUST BE INSTALLED AT
THE OUT OF THE CT BOARD OF THE LAST UNIT WITH CT SECONDARY
WIRING CONNECTED.
FAILURE TO FOLLOW THESE INSTRUCTIONS WILL RESULT IN DEATH OR
SERIOUS INJURY.
The active filters can be set up to be either primary or secondary.
to be a candidate as a primary, the unit must be provided with
CT secondary wiring to the CT board. See
Figure 36
on
page 32
.
There is no limit to the number of units that can be set up as a
primary candidate. At least two units should be capable of being
the primary in any parallel installation.
The main CTs must be installed on the source side of the active
filter system. Examples of CT secondary wiring can be seen on
the following pages in this section. Refer to “
Circuit breaker and
manual disconnect selection
” on
page 23
for information on
circuit breaker and fuses required.
