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Busbar tap-off unit
9.8
Safety information for handling current
transformers and measurement devic-
es with residual current measurement
The following applies to the current transformers
and measurement devices with residual current
measurement used in the busbar tap-off unit:
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!
WARNING
Risk of injury or damage to the meter due to
improper use!
Meters with residual current measurement can trig-
ger warning pulses if limit values are exceeded, and
these are used exclusively for monitoring residual
currents or failure monitoring. Use of the warning
pulses as a stand-alone protective device against
electrical shock can lead to injury and even death!
·
Do not use devices with residual current mea-
surement as a stand-alone protective device.
Employ suitable protective devices for your
system!
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!
·
Ensure galvanic isolation of the residual cur-
rent measuring inputs from each other!
WARNING
Disregard of the connection conditions of the
transformers to Janitza measurement devices
or their components can lead to injuries or even
death or to material damage!
·Do
not
use the outputs of the Janitza measure-
ment devices or their components for switching
protective devices or protective relays! Do
not
use “Transformers for protection purposes”
!
·For Janitza measurement devices and their
components use
only “Transformers for mea-
surement purposes”
which are suitable for the
energy monitoring of your system.
·Observe the information, regulations and limit
values in the usage information on
“Transform-
ers for measuring purposes”
, specifically
during testing and commissioning of the Janitza
measurement device, the Janitza component
and your system.
