6 Commissioning
Maschinenfabrik Reinhausen GmbH 2021
52
8209941/00 EN
ECOTAP
®
VPD
®
III 30D-24 / MD&C
The control ensures that the required cooling time of approx. 3 seconds is
maintained after each on-load tap-change operation. During this time, the
control will not accept any tap-change commands.
6.1.2 Tests on the transformer
Please contact Maschinenfabrik Reinhausen GmbH (MR) if any aspect of
the tests is not clear.
6.1.2.1 Electrical high-voltage tests on the transformer
WARNING
Danger of death or severe injury from explosive gases when
testing the transformer!
Danger of death from flying debris and spraying of hot oil if incorrect action
is taken when explosive gases accumulate under the transformer cover, in
the piping, in the oil conservator, and at the dehydrating breather opening!
► Ensure that there are no naked flames, hot surfaces or sparks (for exam-
ple caused by static charging) in the immediate surroundings and that
none occur.
► Ensure that the on-load tap-changer is fully submerged in oil.
► Only use conductive and grounded hoses, pipes, and pump equipment
that are approved for flammable liquids.
► Ensure that all safety equipment is ready for use.
► Use suitable personal protective equipment/clothing.
► Keep away from the danger area during the transformer test.
► Observe applicable fire protection regulations.
► Make sure that only trained technicians perform work on the transformer.
Every on-load tap-changer has been specially designed by the manufacturer
for the transformer in the respective purchase order and is subjected to strict
tests and quality controls at the manufacturer’s factory.
However, joint operation of transformer and on-load tap-changer cannot be
simulated by the manufacturer and cannot be tested on the on-load tap-
changer alone.
For this reason, irregularities or malfunctions cannot be completely ruled out
during the transformer test (i.e. testing the first joint operation of transformer
and on-load tap-changer).
Summary of Contents for ECOTAP VPD 3 30D-24
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