MR VACUTAP, Operating Instructions Manual

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6 Fault elimination
Maschinenfabrik Reinhausen GmbH 2020 39 5788897/03 EN VACUTAP
®
VVS
®
Germany
Phone: +49 94140 90-0
Fax: +49 9 41 40 90-7001
E-mail: service@reinhausen.com
Internet: www.reinhausen.com
Fault description Action
Tripping of protective relay See "Tripping the protective relay and re-commissioning
the transformer"
Also contact MR.
Tripping of pressure relief device (e.g. MPreC®) On-load tap-changer and transformer must be checked.
Depending on the cause of tripping, take measurements /
carry out checks on the transformer.
Contact MR to check the on-load tap-changer.
Tripping of pressure monitoring device (e.g. DW 2000) See "Tripping the pressure monitoring device and putting
the transformer back into operation"
Also contact MR.
Activation of tap-change supervisory device The motor-drive unit can no longer be electrically actuated
once the tap-change supervisory device has been acti-
vated. Manual operation of the motor-drive unit via the
hand crank when the transformer is switched on is prohib-
ited.
On-load tap-changer and transformer must be checked.
Depending on the cause of tripping, take measurements /
carry out checks on the transformer.
Contact MR to check the on-load tap-changer.
Activation of rupture disk in on-load tap-changer head
cover On-load tap-changer and transformer must be checked.
Depending on the cause of tripping, take measurements /
carry out checks on the transformer.
Contact MR to check the on-load tap-changer.
Tripping of motor protective switch in motor-drive unit See chapter "Fault elimination" in the operating instruc-
tions of the TAPMOTION® ED motor-drive unit
Tripping of signaling contact that indicates that the fill level
of the insulating fluid has fallen below the minimum in the
on-load tap-changer oil conservator Check pipe system (pipes etc.) and on-load tap-changer
head for leaks. Check the fill level and the quality of the in-
sulating fluid in the oil compartment in accordance with the
operating instructions for the on-load tap-changer. If the fill
level has fallen below the limit values, also contact MR.
On-load tap-changer not changing tap position (sluggish-
ness, Raise keys / Lower keys not working, no audible di-
verter switch action) Contact MR.
No change in voltage on transformer despite change in po-
sition on motor-drive unit Contact MR.
Tap position indicator on motor-drive unit and on-load tap-
changer different Contact MR.
Noises on drive shaft or motor-drive unit when changing
tap position Ensure proper mounting of the drive shaft in accordance
with its operating instructions. Check that hose clips and
protective covers are seated correctly. Contact MR in the
event of noise from the motor-drive unit.