5 Mounting
Maschinenfabrik Reinhausen GmbH 2021
45
8209941/00 EN
ECOTAP
®
VPD
®
III 30D-24 / MD&C
2. Press
or
until the desired operating position is reached.
ð
The new operating position is displayed on the control unit.
3. Carry out the transformer ratio test in all operating positions.
ð
Once the results have been checked, the transformer ratio test is com-
plete.
Check the transformer configuration in accordance with the supplied con-
nection diagrams if the tap-change operation is not in the desired direction.
The behavior of the control unit (lowest voltage at smallest or largest posi-
tion) can be adjusted accordingly via parameterization. To do so, follow the
description in the ECOTAP® VPD® MD&C motor-drive unit operating in-
structions, section "Inverting travel commands".
Carrying out DC resistance measurement
The measured DC current is normally restricted to 10% of the rated current
of the measured transformer winding in order to prevent the winding from
overheating.
Observe the maximum permitted measured currents for the on-load tap-
changer during the DC resistance measurement on the transformer.
Maximum permissible measured cur-
rent
Transformer tank empty
Maximum 10 A DC
Transformer tank filled with insulating oil
Maximum 10 A DC
Table 8: Maximum permissible measured currents
1. Press
on the control unit to activate manual mode.
ð
LED above the key lights up.
2. Switch the on-load tap-changer through the complete regulating range us-
ing the buttons
and
to remove any potential foreign-particle build
ups on the contacts.
ð
The operating position will be displayed on the control unit.
3. Carry out the DC resistance measurement in all operating positions.
ð
Once the results have been checked, the DC resistance measurement is
complete.
Содержание ECOTAP VPD 3 30D-24
Страница 131: ......