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7 Operation
Maschinenfabrik Reinhausen GmbH 2021
69
8209941/00 EN
ECOTAP
®
VPD
®
III 30D-24 / MD&C
7 Operation
On-load tap-change operations can be undertaken both manually and auto-
matically. You can see the selected operating mode on the LED display on
the control unit.
In the EXTERNAL CONTROL operating mode, the device executes control
commands from an external controller (e.g., ECOTAP® VPD® CON-
TROL PRO). In this case, manual operation using the LOWER and RAISE
keys is not possible. In this case, please note the safety instructions and the
detailed description in the associated operating instructions for the external
controller.
In the AVR AUTO operating mode, the tap-change operations are executed
in accordance with the set control parameters.
By pressing the AVR MANUAL key once, you can switch to the manual op-
erating mode and then execute tap-change operations by pressing the UP/
DOWN arrow keys.
Standard mode is not designed for tap-change operations without a control
unit.
Should you experience problems in operating the control unit or on-load tap-
changer, consult the "Fault elimination" section.
7.1 Monitoring on-load tap-changer
Monitoring of the on-load tap-changer, motor-drive unit, and control unit is
limited to occasional visual checks. For efficiency reasons, these visual
checks can be combined with the usual checks on the transformer.
Pay particular attention to the following:
▪ Oil impermeability at transition points between sealing module and trans-
former cover
▪ Cable connections between control unit and motor-drive unit are in a
sound condition
▪ Other damage
In the event of noticeable discrepancies, contact Maschinenfabrik Rein-
hausen GmbH's Technical Service department.
Содержание ECOTAP VPD 3 30D-24
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