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Module 96-PA-RCM / 96-PA-RCM-EL
6.3 Current direction for the current
transformer on I5 and I6.
For residual current measurements at the
measuring inputs I5 and I6, the device makes no
distinction between the current directions. This
means that incorrect connection does not require
reconnection afterwards.
NOTE
The device makes no distinction 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
transformers!
·
Before interrupting the current supply,
short circuit the secondary connections of
the current 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
current transformer connection on the device
are adequately tightened!
·
Comply with the information and provisions
in the documentation of your current
transformers!
·
Existing ground connections on the
secondary 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 in chap.
·
Comply with the information and provisions
in the documentation of your current
transformers!
ATTENTION
Damage to the device/your system due to short
circuit!
Inadequate insulation of the operating equipment
at the analog inputs with respect to the supply
circuits can lead to damage of your device or
system.
·
Ensure reinforced or double insulation with
respect to the supply circuits!
6.4 Residual current transformer example
A residual current transformer is used to measure
on insulated mains wiring in a 300 V CAT III
network.
Solution:
Provide basic insulation for 300 V CAT III for
the insulation 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.
NOTE
For the residual current monitoring, the basic
device with module requires the mains frequency.
For this purpose, apply a measured voltage
or configure a fixed frequency.
6.5 Important information about the residual
current inputs
NOTE
The ratios for the residual current transformer
inputs can be configured individually on the basic
device with module, or, along with additional
parameters relevant for the module, via the
GridVis
®
network visualization software.
CAUTION
Risk of injury or damage to the device/your
system 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!
·
Ensure galvanic isolation of the residual
current measuring inputs from each other!
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