10 Fault elimination
Maschinenfabrik Reinhausen GmbH 2020350 6385142/08 ENETOS
®
ED
10.3 Fault in the environment of the motor-drive unit
Error pattern Action
No change in voltage on transformer de-
spite change in position on motor-drive
unit
▪ Contact MR
Noises on drive shaft or motor-drive unit
when changing tap position
▪ Ensure that the motor-drive unit is at-
tached correctly, in accordance with
the "Assembly" [►Section 6, Page 60]
chapter.
▪ Make sure that the drive shaft includ-
ing protective cover is assembled cor-
rectly, in accordance with the operat-
ing instructions for the on-load tap-
changer / de-energized tap-changer.
Table126: Fault in the environment of the motor-drive unit
10.4 Fault in the motor-drive unit when the switching operation
has not ended
If the motor-drive unit stops and if the arrow of the tap-change indicator does
not point in the area highlighted in gray (see the "Indication field" section,
Position 3), then the switching operation has not been ended correctly.
This is a stationary state that is not allowed and must be rectified im-
mediately. If you cannot rectify the fault immediately, switch off the trans-
former. Contact the Technical Service department at Maschinenfabrik Rein-
hausen GmbH immediately.
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