6 Commissioning
36 10014218/00 EN
6.1.2 Filling with oil via conservator
If the device is to be filled with oil via the conservator, proceed as follows:
ü The isolation valves are fully open.
1. Loosen the 4screws (hex-wrench 4mm) on the cover of the test button
and remove the cover.
2. NOTICE! Damage to the reset screw. Do not use any tools on the reset
screw. Screw the reset screw in completely by hand.
ð The float will be forced upward and the main valve opens.
3. Wait until the transformer is filled with oil.
ð Monitor the float position and main valve opening via the inspection
window.
4. Vent the Buchholz relay (if installed) in accordance with the operating in-
structions provided.
5. To vent the shutter valve, remove the protective cap from the drain valve
(wrench size17).
6. Turn the lever of the drain valve counterclockwise to vent the device.
7. As soon as insulating fluid begins to escape, turn the lever of the drain
valve clockwise to close the drain valve.
8. Position the protective cap on the drain valve, screw on hand-tight and
then tighten with maximum one half turn (wrench size17).
9. NOTICE! Damage to the reset screw. Do not use any tools on the reset
screw. As soon as the device is filled with oil, screw the reset screw out
completely by hand to reestablish normal operating conditions.
10. Pull the test button down 3 to 5 times to completely fill the valve with oil.
ð The float moves up due to the oil surrounding it. This upward motion
also pulls the test button upwards automatically.
11. If you see air bubbles are rising in the inspection window, repeat steps4
through 8 until no more air bubbles rise.
ð The device is filled with oil and vented.
6.2 Leak test
ü The pipes are filled with insulating fluid.
1. Check the tightness of the flange connection.
2. If the connection is not tight, check the gasket and replace it if necessary.
ð The test is complete.
To Next Page
Loading...
Need help?
General
