MR VACUTAP VMS - Page 53

7 Maintenance
Maschinenfabrik Reinhausen GmbH 2020 535993419/02 EN VACUTAP
®
VMS
®
4. Once the gas has been discharged and insulating fluid is flowing out of
the air-vent valve, close the air-vent valve.
5. Close the stop-cock between the oil conservator and on-load tap-changer.
6. Open air-vent valve E1 again and extract approximately 5–10 liters of in-
sulating fluid via the pipe connection S until the area under the on-load
tap-changer head cover is free of insulating fluid.
7. Remove the screws and washers from the on-load tap-changer head
cover.
Figure26: On-load tap-changer head cover
8. Remove on-load tap-changer head cover.
Figure27: On-load tap-changer head cover
9. Extract insulating fluid via pipe connection S.
10. Open the stop-cock between oil conservator and on-load tap-changer.
ð The insulating fluid flows out of the oil conservator into the oil com-
partment.
11. Extract insulating fluid via pipe connection S.