MR VACUTAP VMS - Re-Commissioning the Transformer

6 Fault elimination
Maschinenfabrik Reinhausen GmbH 2020 455993419/02 EN VACUTAP
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VMS
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2. Contact and inform Maschinenfabrik Reinhausen of the following:
ð What was the load of the transformer at the instant of tripping?
ð Was there a tap-change operation on the on-load tap-changer immedi-
ately before or during the tripping?
ð Did any other protective devices of the transformer respond at the in-
stant of tripping?
ð Were switching operations in the network being carried out at the in-
stant of tripping?
ð Were overvoltages registered at the instant of tripping?
ð How high is the static pressure on the pressure relief device (height dif-
ference between the oil level in the on-load tap-changer oil conservator
and the pressure relief device)?
3. Take further action in agreement with Maschinenfabrik Reinhausen.
6.2.3 Re-commissioning the transformer
You can re-commission the transformer once the cause for tripping the pres-
sure monitoring device has been determined and resolved:
1. Ensure that the sensor on the snap-action switch is in the OPERATION
position.
2. Commission the transformer.