MR OILTAP R, Installation And Commissioning Instructions

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6 Commissioning the on-load tap-changer at the transformer manufacturer's site
Maschinenfabrik Reinhausen GmbH 2015 166 4427410/00 EN OILTAP® R
1.
NOTICE!
Make sure that in each operating position the tap position in-
dicators of motor-drive unit and on-load tap-changer (inspection window
in the on-load tap-changer head) read the same position. An incorrectly
coupled motor-drive unit will damage the on-load tap-changer.
2. Check, in both end positions, the function of the electrical and mechani-
cal end stop (see MR operating instructions for the "TAPMOTION®
ED").
High-voltage tests on the transformer
WARNING
Danger of death or severe injury!
Danger of death or severe injury from explosive gases under the on-load
tap-changer head cover, in the pipework system, in the oil conservator, at
the dehydrating breather opening, and from flying parts and hot oil splash-
ing!
► Ensure that there are no naked flames, hot surfaces or sparks (for ex-
ample caused by static charging) in the immediate surroundings and
that none occur.
► Ensure that the oil compartment of the on-load tap-changer is com-
pletely filled with oil.
► Only use conductive and grounded hoses, pipes, and pump equipment
that are approved for flammable liquids.
► Ensure that all the on-load tap-changer's safety equipment is ready for
use.
► Use suitable personal protective equipment/clothing.
► Keep away from the danger area during the transformer test.
► Observe applicable fire protection regulations.
► Make sure that only trained technicians perform work on the transform-
er.
It is essential that you ensure only trained, instructed expert personnel who
are familiar with and comply with the pertinent safety and technical regula-
tions, who are aware of the potential risks, and who consistently use the oc-
cupational safety equipment provided to prevent injury and property damage
are assigned to perform such a transformer test.
Note the following points before undertaking high voltage tests on the trans-
former:
▪
Ensure that the ground connections on the motor-drive protective hous-
ing and protective housing fastening are free of paint.
▪ Only perform high voltage test if motor-drive unit door is closed.
▪ Disconnect external connections to electronic components in the motor-
drive unit to prevent damage from overvoltage.
▪ When connecting the motor-drive unit's supply voltage, only use the
holes in the protective housing base intended for lead insertion.
6.5