DOC. SIE10110 Rev. 6 Page 26 of33
3.12.6 Thermal printer PII14102
Thermal printer, for the printout of the V-I curve in the CT saturation test. Paper 112 mm wide.
3.12.7 BU2000: very high AC current boosters
The very high current booster option allows performing high current primary tests with currents up
to 4000 A.
The very high current booster is designed to generate the current while over-loading the generator;
its configuration changes according to the desired current value and duration. The option is made of
two modules:
. Transformers BU2000 MAIN and BU2000 AUX: they include the connection cable to the CT and
the clamps;
. BU2000 INTERPOSING MODULE.
The BU2000 MAIN transformer is used in all versions; the number of BU2000 AUX transformers
can be selected as a function of the desired test current and/or test duration. In case of a single
transformer the interposing module is not necessary.
The option is designed around the concept to avoid wasting power on the connection cables, by
putting the power transformers as close as possible to the test object. This approach is particularly
useful when the test is performed on CT’s in the field, that are from 5 to 10 meters above the
ground. The solution is sound because the weight of transformer plus cable plus clamps is
comparable to the weight of the connection cables. The highest the test current the biggest the
weight of the transformers, but also the biggest the weight of the connection cables. With this
solution, the connection cable to the power source is much lighter, does not pose any major problem
of voltage drop, and can be any length.
The following sketch shows the connections between T2000, the BU2000 INTERPOSING
MODULE and the transformers (up to 4).
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