21
7
DIN Rail CT Interface Card
Installation
The DIN Rail CT Interface Card is
mounted as closed to the location
where the CTs are placed to minimize
CT wiring distance. The board is instal-
led by mounting it on a standard 35mm
DIN rail strip which can be affixed
mechanically using screws or bolts, or
using VHB tape to affix the DIN rail.
Current Transformer Types
Connect the current transformers (CT’s)
into to the CT terminal block as shown
in figure. Always observe the wiring
polarity with the white or positive wire
of the CT connecting to the top terminal
blocks and black or negative to the bot-
tom terminal blocks as shown in figure.
Prior to inserting the CT wires ensure
that at least 8 mm (¼”) of CT conductor
is uninsulated before inserting into the
terminal. Gently pull the conductor after
insertion to ensure that is secured by
the cage connector.
If the conductor needs to be removed
from the terminal push the lever on top
of the terminal gently pull the conductor
when the lever is depressed.
The DIN Rail CT Interface Card is desig-
ned to used 0.33 V output CTs provided
by Janitza. Other 0.33 V CTs won`t
work, Janitza does not warranty the
performance if third party CTs are used.
DO NOT USE unburdened i.e. current
output, CTs as these will destroy the
board as well as can produce lethal
voltages during installation.
CTs types (i.e. solid core and split core)
and current ranges (i.e. 50 A – 600 A)
may be mixed on any circuit so long
as the correct current specification
is configured in the CT setting on the
configuration chart.
Solid Core
0.33 Vout
Split Core
V
out
Summary of Contents for UMG 804
Page 19: ...19 1 2 3...
