6 Commissioning
Maschinenfabrik Reinhausen GmbH 2020
42
1800138/08 EN
TAPMOTION
®
ED
Tests on the transformer
Please contact Maschinenfabrik Reinhausen GmbH (MR) if any aspect of
the tests is not clear.
High-voltage tests on the transformer
Note the following points before performing high-voltage tests on the trans-
former:
▪ Ensure that the oil compartment of the on-load tap-changer is completely
filled with insulating fluid.
▪ Ensure that all protective devices for the on-load tap-changer are function-
ing correctly and are ready for use.
▪ Ensure that the ground connections on the motor-drive protective housing
and protective housing fastening are free of paint.
▪ Only perform high voltage test if motor-drive unit door is closed.
▪ Disconnect external connections to electronic components in the motor-
drive unit to prevent damage from overvoltage.
▪ When connecting the motor-drive unit's supply voltage, only use the cable
bushings in the protective housing base intended for lead insertion.
▪ Guide all ground connecting leads to one central connection point (estab-
lishment of suitable reference earth).
▪ Disconnect all electronic components before the high voltage test. Before
a dielectric test of the wiring, remove all devices with a withstand voltage
of < 1000 V.
▪ Remove leads used for testing before the high voltage test as these func-
tion as antennas.
▪ Wherever possible, route the measurement leads and data leads sepa-
rately to the energy cables.
Contact the manufacturer if you have any questions about possible sources
of danger.
Dielectric tests on transformer wiring
Note the following points for dielectric tests on the transformer wiring:
The motor-drive unit is put through dielectric tests before delivery.
► Before the dielectric test for the transformer wiring, disconnect drive from
the section to be tested to rule out increased component loading for those
components fitted in the motor-drive unit.
6.3
6.3.1
6.3.2
