MR VACUTAP - Changing Insulation Fluid

7 Maintenance
Maschinenfabrik Reinhausen GmbH 202064 5788897/03 ENVACUTAP
®
VVS
®
7.3 Changing the insulation fluid
NOTICE
Damage to the on-load tap-changer!
Small parts in the oil compartment may block the diverter switch insert,
thereby damaging the on-load tap-changer.
► Ensure that parts do not fall into the oil compartment.
► Check that all small parts are accounted for.
Change the insulating fluid in the on-load tap-changer oil compartment and
oil conservator if the dielectric strength and water content are not in compli-
ance with the limit values specified in the technical data.
7.3.1 Moving on-load tap-changer to adjustment position
1. Make a note of the current operating position of the on-load tap-changer.
2. Move the on-load tap-changer to the adjustment position. The adjustment
position is indicated in the on-load tap-changer connection diagram in-
cluded in delivery.
7.3.2 Removing horizontal drive shaft
NOTICE
Damage to the on-load tap-changer and transformer!
Damage to on-load tap-changer and transformer if motor-drive unit is oper-
ated when not coupled!
► Never operate the motor-drive unit if the horizontal drive shaft has been
removed.
► As a precaution, block the motor-drive unit against electrical operation by
actuating the motor protective switch (see operating instructions for "Tap-
motion® ED").