8 Maintenance and inspection
46 10014218/00 EN
4. Unscrew and remove the drain plug (wrench size10).
Figure21: Removing the drain plug (example – BPM bypass)
1 Drain plug
ð The insulating fluid flows out of the device.
5. Capture the insulating fluid in a suitable container.
6. Tighten the drain plug (wrench size10, 5Nm) and close the bypass.
7. Tighten the screw in the block on the base of the device (wrench size10,
5Nm).
8. Close the drain valve.
9. If necessary, remove the device.
BPR bypass
1. Close the isolation valves to isolate the device.
2. Open the drain valve.
3. Depending on the design of the bypass unit, either loosen the union nuts
on the pipe on the ball valve and remove the pipe or, if a three-way valve
is used, open it.
ð The insulating fluid flows out of the device.