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Module 96-PA-RCM / 96-PA-RCM-EL
6.3 Current direction for the current trans-
former on I5 and I6
For residual current measurements at the measur-
ing inputs I5 and I6, the device makes no distinc-
tion between the current directions. This means
that incorrect connection does not require recon-
nection afterwards.
6.4 Residual current transformer 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
insulation of the network wiring and the insulation
of the residual current transformer. This corre-
sponds 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.
6.5 Important information about the residual
current inputs
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 measurement input with
respect to the supply circuits can cause voltag-
es at the measurement 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 cur-
rent measuring inputs from each other!
INFORMATION
For the residual current monitoring, the basic
device with module requires the mains frequen-
cy. For this purpose, apply a measured voltage
or configure a fixed frequency.
INFORMATION
The ratios for the residual current transformer
inputs can be configured individually on the basic
device with module, or, along with additional pa-
rameters relevant for the module, via the GridVis
®
network visualization software.
INFORMATION
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 elec-
trical 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 in chap.
2.7 on page 23.
·
Comply with the information and provisions
in the documentation of your current trans-
formers!
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 cir-
cuits can lead to damage of your device or system.
·
Ensure reinforced or double insulation with
respect to the supply circuits!
