janitza UMG 806, Руководство пользователя и технические данные

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UMG 806 www.janitza.com
7.6.1 Current direction of the residual current
transformers
For residual current measurement with current
transformers in AC operation at the measuring
inputs, the device does not distinguish between
the current directions. Incorrect connection of the
residual current transformers in AC operation does
not require subsequent rewiring.
INFORMATION
The meter does not distinguish between the current
directions of the residual currents.
The residual currents of the grid side or load side
are
not
directionally sensitive.
WARNING
Risk of injury due to large currents and high
electrical voltage on the current transformers!
Current transformers operated while open on the
secondary side (high voltage peaks pose a hazard
when touched) can result in severe bodily injury or
death.
·
Avoid operating the current transformers
while open; short circuit the unloaded trans-
formers!
·
Before interrupting the current supply, short
circuit the secondary connections of the cur-
rent transformers. Switch any test switches
that automatically short circuit the secondary
lines of the current transformers to the “Test”
status (Check the test switch/short circuiting
connection beforehand)!
·
Only use current transformers with basic
insulation to IEC 61010-1:2010!
·
Caution, even current transformers rated as
safe for open operation can pose a hazard
when touched during operation while open!
·
Make sure that screw terminals for the cur-
rent transformer connection on the device
are adequately tightened!
·
Comply with the information and provisions
in the documentation of your current trans-
formers!
·
Ground connections present on the sec-
ondary windings of the current transformers
must be connected to ground!
·
Observe the general safety information for
handling current transformers and devices
with residual current measurement.
7.6.2 Residual current transformer example
Operating equipment must have reinforced or
double insulation from supply circuits!
Example:
A residual current transformer is used to mea-
sure on insulated mains wiring in a 300 V CAT III
network.
Solution:
Provide basic insulation for 300 V CAT III for the in-
sulation of the network wiring and the insulation of
the residual current transformer. This corresponds
to a test voltage of 1500 V AC (1 min. duration) for
the insulated network wiring and a test voltage of
1500 V AC (1 min. duration) for the residual current
transformer.
CAUTION
Risk of injury or damage to the meter/your sys-
tem due to short circuit!
Inadequate insulation of the operating equipment
at the residual current measuring input with respect
to the supply circuits can cause voltages at the
measuring input which represent a hazard when
touched or damage to your device or system.
· Ensure reinforced or double insulation with
respect to the supply circuits.
WARNING
Risk of injury or damage to the device due to
electrical voltage and improper connection!
High measuring currents can cause temperatures
of up to 80 °C (176 °F) at the connections.
Use wiring designed for an operating tempera-
ture of up to 80 °C (176 °F)!