7
CTB series current transformer
WARNING
Warning of unauthorized tampering or improper
use of the device!
Opening, dismantling or unauthorized manipulation of
the device which goes beyond the mechanical, elec-
trical or other operating limits indicated can lead to
material damage or injury, up to and including death.
·Only electrically qualified personnel are permitted
to work on the devices, components, assemblies,
systems and current circuits.
·Always use your device only in the manner de-
scribed in the associated usage information.
·If there is discernible damage, send the device
back to the manufacturer!
2.8 Incoming goods inspection
The prerequisites for trouble-free and safe operation
of the devices include proper transport, storage,
setup and assembly, as well as proper operation
and maintenance.
Exercise due caution when unpacking and packing
the device, do not use force and only use suitable
tools. Check the following:
·Visually inspect the devices for flawless mechanical
condition.
·Your delivered devices for completeness before you
start with assembly and installation.
If it must be assumed that safe operation of your
device is not possible:
1. Switch off the power to your system (your
device)!
2. Secure it against being switched back on!
3. Check to be sure it is de-energized!
4. Ground and short circuit the system (device)!
5. Cover or block off adjacent live parts!
Safe operation is impossible, if the device:
·has visible damage,
·no longer functions despite an intact power supply,
·was subjected to extended periods of unfavorable
conditions (e.g. storage outside of the permissible
climate thresholds without adjustment to the room
climate, condensation, etc.) or transport stress
(e.g. falling from an elevated position, even without
visible external damage, etc.).
2.9 Intended use
The device:
·Is only for use in the industrial sector.
·Is intended for use in dry, electrical operating rooms
and closed housings, such as switchboard cabinets
and small distribution boards.
The device is
not
for installation
·In vehicles! Use of the device in non-stationary
equipment constitutes an exceptional environmen-
tal condition and is only permissible by special
agreement.
·In environments with harmful oils, acids, gases,
vapors, dusts, radiation, etc.
·In potentially explosive environments.
2.7 Safety information for handling current
transformers
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 transformers!
·Before interrupting the current supply, short circuit
the secondary connections of the current trans-
formers. Switch any test switches that auto-
matically short circuit the secondary lines of the
current transformers to the “Test” status (Check
the test switch/short circuiting connection before-
hand)!
·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 ade-
quately tightened!
·Comply with the information and provisions in the
documentation of your current transformers!
CAUTION
Risk of injury or damage to the meter due to high
measurement currents at the connections of the
current transformers!
High measurement currents can cause temperatures
of up to 80 °C (176 °F) on the connections of the
current transformers
·Use wiring that is designed for an operating tem-
perature of at least 80 °C (176 °F)!
·The current transformers can be hot even after the
power supply has been switched off. Allow the
connections of the current transformers and the
connecting cables to cool down before touching
them!