janitza UMG 604-PRO, User Manual And Technical Data

Page: 22 / 87

UMG 604-PRO
www.janitza.de
17
6. 4 Current measurement
The device:
• is intended for connecting current
transformers with secondary currents of
../1 A and ../5 A.
• does not measure DC.
• has current measurement inputs that can
be continuously loaded with 6 A or loaded
with 100 A for 1 second.
c c
WARNING!
Risk of injury due to elec-
tric voltage on current
transformers!
On current transformers that are operated open
on the secondary side,
high voltage peaks that are dangerous to touch
can occur, which can cause severe bodily injuries
or death.
Therefore, note the following:
• Avoid operating the current transformers
open.
• Short circuit all unloaded current
transformers.
• Connect the earthing connections provided
on the current transformer to the earth.
• You must short circuit the secondary
connections on the current transformer
before interrupting the power supply.
• If a test switch, which automatically short-
circuits the secondary wires of the current
transformer is available, it is sufficient to
set this to the "Test" position as long as the
short-circuiting device has been checked
beforehand.
• Ensure that the attached screw-type
terminal is affixed to the device sufficiently
using the two screws.
• Safe open-circuit current transformers are
also dangerous to touch when they are
operated open.
C C
NOTE!
It is not necessary to configure
a connection schematic for
measurement inputs L4 and I4.
Consumer
L3
L1
L2
N
S
1
S
2
S
1
S
2
S
1
S
2
S
1
S
2
Fig.
Current measurement via current transformers
connection example.
c c
WARNING!
Risk of injury due
to electric voltage!
Current measurement inputs are
dangerous to touch.