MR VACUTAP VMS - Checking Motor-Drive Unit

4 Commissioning
Maschinenfabrik Reinhausen GmbH 202034 5993419/02 ENVACUTAP
®
VMS
®
4.1.2.2 Bleeding suction pipe on pipe connection S
1. Remove screw cap from pipe connection S.
Figure21: Screw cap
2. NOTICE! An incompletely bled suction pipe significantly impairs the insu-
lation capability of the on-load tap changer to ground. Open vent screw
and bleed suction pipe completely.
3. Close vent screw.
4. Seal vent screw with screw cap.
4.1.3 Checking motor-drive unit
NOTICE
Damage to the on-load tap-changer / de-energized tap-changer!
Damage to the on-load tap-changer / de-energized tap-changer due to actu-
ation of the on-load tap-changer / de-energized tap-changer without insulat-
ing fluid.
► Ensure that the selector / de-energized tap changer is fully immersed in
insulating fluid and that the oil compartment of the on-load tap-changer is
completely filled with insulating fluid.