MR VACUTAP VMS - Page 55

7 Maintenance
Maschinenfabrik Reinhausen GmbH 2020 555993419/02 EN VACUTAP
®
VMS
®
5. Screw the on-load tap-changer head cover onto the on-load tap-changer
head.
Figure30: On-load tap-changer head cover
6. Fill the oil conservator with fresh insulating fluid.
7. Vent the on-load tap-changer head via air-vent valve E1 on the on-load
tap-changer head cover. To do this, remove screw cap and lift valve tap-
pet with a screwdriver.
8. Seal air-vent valve E1 with screw cap (tightening torque 10 Nm).
9. Remove screw cap from pipe connection S.
Figure31: Pipe connection S
10. Open vent screw and bleed piping.
11. Close vent screw.
12. Seal vent screw with screw cap.
13. Check the level in the oil conservator and top up with insulating fluid if
necessary.
14. Re-vent the on-load tap-changer head via air-vent valve E1 and the pipe
connection S via the vent screw.