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High Voltage Instrument Transformers | CA/UT/KA
User Manual
INSTALLATION
Model Weight* Procedure
KA, CA >1,600 kg
According to Fig. 4: The movements will be made by hooking the device with four slings
through the four holes which are located at the base for this purpose. A sling must be
fi xed at head height, hugging the lifting slings, to prevent the transformer from swinging,
as indicated in Fig. 4a or in Fig. 4b.
Note: The center of gravity of the CA models is very high. The center of gravity of UT
models is very low.
UTx-52..300
KA, CA <1,600 kg
According to Fig. 3. The movements will be carried out by hooking the device with two
slings through the two eyebolts arranged for that purpose on both sides of the head or
intermediate body.
UTx-420..525
*The total weight of the transformer is indicated on the nameplate
Once the equipment has been placed in an upright position, a
visual inspection is suggested so as to detect possible oil leaks
or stains.
Oil stains are not necessarily the result of a leak. In most cases,
the stains are nothing more than oil residues left over from the
manufacturing process.
The stain should be cleaned with a degreaser and the equipment
should be kept under observation. If the stain reappears or
spreads, contact the manufacturer.
MOUNTING ON THE STRUCTURE OR PLATFORM/
Check the information on the nameplate to verify that the
electrical characteristics match those of the system.
Check the status of the oil compensator’s position indicator. If
the indicator is hidden, the device cannot be connected to the
network, and ARTECHE or the supplier of the equipment must
be informed (Fig. 5).
Some transformers have a mechanical protection for the
compensator that must be removed before installation (Fig. 6).
If this is the case, it shall be indicated on the equipment itself by
means of a label.
Carefully check to make sure that all four legs of the device sit
perfectly on the platform, before tightening the anchor screws.
If this is not the case, correct the defect, by wedging metal
plates or similar. Failure to do so may result in insulator breakage
or oil leakage.
When the device is in a vertical position, movements can be made as indicated at Fig. 2, Fig. 3 and Fig. 4.
DANGER
INJURY AND/OR FIRE
› Do not install the equipment without following our specifi cations
› Use the transformers under proper service conditions and according to specifi cations
› Do not loosen any screws or fastening nuts, it can cause oil leaks
ELECTRICAL DISCHARGE
› Do not wire or connect when the equipment is energized
› The delta-tangent measurement tap (if any) must always be grounded when the transformer is
in service
› The ground terminal of the apparatus must be solidly earthed by means of a connection capable
of withstanding and conducting the line’s fault current to earth
› Do not short-circuit the secondary circuit of the voltage transformer
› Do not leave the secondary circuit of the current transformer open
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