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UMG 804
21
10. Multi-Circuit Monitor Interface
Board Installation
DANGER
HAZARD OF ELECTRIC SHOCK,
EXPLOSION, OR ARC FLASH
·
While removing or installing panels and
covers, assure that they do not contact an
energized bus.
·
NEVER bypass external fusing.
·
NEVER short the secondary of a potential
transformer.
·
Before closimg covers and doors, carefully
inspect the work area and remove any tools,
wire scraps or other objects that may have
been left inside the equipment.
Failure to follow these instructions will result in
death or serious injury.
DANGER
RISQUE DE CHOC ÉLECTRIQUE, D’EXPLO-
SION OU D’ARC ÉLECTRIQUE
·
Lors du retrait ou de l’installation des pan-
neaux et des capots, assurez-vous qu’ils ne
sont pas en contact avec un bus sous ten-
sion.
·
NE JAMAIS contourner la fusion externe.
·
NE JAMAIS court-circuiter le secondaire d’un
transformateur de potentiel.
·
Avant de fermer les portes et les capots,
inspectez soigneusement la zone de travail
et retirez tous les outils, débris de fils métall-
iques ou autres objets éventuellement restés
à l’intérieur de l’équipement.
Le non-respect de ces instructions est sus-
ceptible d’entraîner la mort ou des blessures
graves.
10.1 Multi Circuit Monitor Card Installation
The Multi Circuit Monitor Interface Board is typi-
cally mounted as closed to the location where the
CTs are placed to minimize CT wiring distance.
The board is installed by mounting it on a standard
35mm DIN rail strip which can be affixed mechan-
ically using screws or bolts, or using VHB tape to
affix the DIN rail.
10.2 Current Transformer Types
The interface board is designed to used 0.33V
output CTs provided by Janitza. Other 0.33V CTs
will also work but 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. 10 A
– 5000 A) may be mixed on any circuit so long as
the correct current specification is entered on the
configuration chart.
Solid Core
0.33 Vout
Split Core
Fig. 8: Current Transformer types
10.3 Installation and Placement of Current
Transformers
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 posi-
tive wire of the CT connecting to the top terminal
blocks and black or negative to the bottom termi-
nal blocks as shown in figure.
Prior to inserting the CT wires ensure that at least
8mm (¼”) of CT conductor is uninsulated before
inserting into the terminal. Gently pull the conduc-
tor after insertion to ensure that is secured by the
cage connector.
If the conductor needs to be removed from the ter-
minal push the lever on top of the terminal gently
pull the conductor when the lever is depressed.
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