Continued safety and installation instructions
NOTICE
Ensure a safe working environment during
installation, commissioning, shutdown and
during inspection work on the electrical system.
INSTALLATION
You may undertake the following installation work only if
you are a qualified electrician.
WARNING
Shut down the associated electrical system
before installation. Otherwise there is the risk of
suffering an electric shock!
»
Transport the transformer to the intended location.
Secure the base against movement. Bring the trans‐
former into the vertical position as described in the
Ò
User manual.
»
Ensure that the mounting surface is even. Secure the
transformer using the base fixture. Establish the
earthing connection at the transformer base. The
lifting fixings should only be released after the trans‐
former has been fully secured!
»
Avoid mechanical tension during operation. Ensure
that the instrument transformer is not subjected to
any dynamic loads such as vibrations, tensile forces or
knocks.
DANGER
You must not operate the secondary circuit of the
instrument transformer in open condition under
any circumstances. High voltages can occur at
the secondary terminals of the current trans‐
former with the secondary circuit open. There is
risk of death! The values of voltage induced in
the process also endanger the functional safety
of the instrument transformer.
COMMISSIONING
Ensure yourself that the instrument transformer is
installed properly and the secondary and primary cables
are connected correctly.
Have you checked the oil level via the oil level indicator?
Have you maintained the tightening torques specified? If
you have any questions, please ask an experienced col‐
league or contact us directly.
OPERATION
»
During operation, never touch the primary or secon‐
dary terminals.
»
Operate the transformer with the terminal box closed.
»
Ensure that unauthorised persons and children cannot
access the instrument transformer.
»
You must not operate the instrument transformer in
open condition (
»
Operate the instrument transformer only with an
intact composite insulator. Otherwise, you risk oil
leaking, greatly increased partial discharges and an
explosion of the instrument transformer.
SHUTDOWN
Shut down the associated electrical system. For your own
safety, earth the secondary circuit of the transformer.
Ensure that the system remains de-energised while
working on the instrument transformer.
DISMANTLING
Follow the work steps as described under
on page 2. Observe the safety instructions under
lation on page 2.
Then, loosen the secondary and primary terminals, the
base fixtures and the earthing screws.
CLEANING
Follow the work steps as described under
on page 2. Observe the safety instructions under
Regularly inspect the current transformer for external
soiling and damage, at least once a year and after spe‐
cial weather events (sandstorm, hail).
»
Remove any soiling from the insulator at least once a
year as described in the
Ò
User manual. After that, the
transformer must not be taken into use for at least
24 hours.
MAINTENANCE
The instrument transformer is maintenance-free with a
low pollution class and sufficient ventilation (
on page 2).
Carry out a visual inspection at least once a year:
»
Check the primary and secondary connection termi‐
nals and the screw fittings at the earthing connection.
»
Check the oil level at the oil level indicator.
»
Check the insulator for damage.
DO NOT RECTIFY FAULTS ON YOUR OWN!
The transformer cannot be repaired. If you suspect that the
transformer is faulty, please contact us immediately.
GB
ICO
High voltage current transformer for outdoor use
Page
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Version: 09/03/2020
GERMANY HAMBURG • WIRGES • KIRCHAICH • DRESDEN
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