5
The use of current transformer for other purpose
then described above is forbidden if not agreed
with the producer.
Routine test report
The routine test report of a current instrument
transformer includes:
a) verification of terminal markings;
b) inter-turn overvoltage test;
c) determination of errors.
There are two rating plates available for the trans-
former (one glued on the transformer body, the
other in the by-pack kit).
On customer request the following information
can be provided free of charge:
• theoretical current/voltage error and phase dis-
placement values;
• theoretical excitation (magnetization) curves.
Additional reports for supplementary charge,
made available on request:
• test report on accuracy;
• excitation (magnetization) curves;
• additional nameplates (if more than 2 are re-
quired);
• verification tests for measuring cores (classes
0.2; 0.2 S; 0.5; 0.5 S).
5. Maintenance instructions
Excessive dust sediments or any other type of
contamination is to be removed from the trans-
former using a soft brush, in a way not to damage
the insulation or cables taken out from the trans-
former.
6. Transport & Storage
Permitted temperature for transport and storage
ranges from -40°C to +105°C. During transport
and storage the transformers have to be pro-
tected from direct impact of solar radiation. The
transformers are delivered in wooden crates or
fixed on transport pallets.
Transported transformers must be protected to
avoid any damages. Right option of transport
must be wisely chosen.
7. Disposal
Materials used in instrument transformers are
considered as materials without environmental
impact and materials are not toxic. Instrument
transformers have to be disposed of in accor-
dance with national legislation relevant to do-
mestic waste disposal.
8. Handling
All the manipulation has to be performed with
great effort to prevent any damage risks. During
manipulation with the hanging strips make sure
that it was used equipment for minimalizing of
forces applied to active parts (transformer coils) -
cushioned hanging strips, tying direction accord-
ing picture. If necessary place between the strips
and coil/flanges, suitable foam distances to pre-
vent of dangerous pressure to coil. Always check
whether the last insulation layer of the coils is un-
damaged after manipulation. For flanges as well.
9. Normative references
IEC 61869-2 Current instrument transformers
ISO 12100 Machine safety – basic concepts,
general
principles of design
EN 50110-1 Operation of electrical installations
Current instrument transformers are designed,
tested and manufactured in accordance with in-
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04
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04 Manipulation with
the hanging strips
