janitza 14.02.001, Руководство пользователя и технические данные

Страница: 40 / 86

UMG 804 www.janitza.com
40
9.2 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.
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 installed
by mounting it on a standard 35 mm DIN rail strip
which can be affixed mechanically using screws or
bolts, or using VHB tape to affix the DIN rail.
9.2.1 Current Transformer Types
The DIN Rail CT Interface Card is designed 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 pro-
duce lethal voltages during installation.
CTs types (i.e. solid core and split core) and cur-
rent ranges (i.e. 50 A – 600 A) may be mixed on
any circuit so long as the correct current specifica-
tion
is configured in the CT setting on the configu-
ration chart.
Connect the current transformers (CT’s) into to the
CT terminal block as shown in figure 9 at following
page.
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 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.
Solid Core
0.33 Vout
Split Core
Fig.: Current Transformer types
V
out
Note:
CT orientation and wiring polarity will be automatically
corrected to provide the correct reading.
CT- LOAD SIDE
LINE SIDE
CT+