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TR A N S FOR M E R BUS H I NG S T Y PE G S B 8 0 0
I N S TA L L AT I O N A N D M A I N T EN A N C E G U I D E
2.16 Repacking of bushing after transformer FAT-tests
After the transformer FAT-tests, the bushing shall be
repacked in its crate.
Mount the draw rod with its bottom contact in its intended
position in the bushings center tube and tighten in
accordance with section 2.10.2.
In the crate there is a separate box in the air-side end of the
bushing, where two sealed plastic bags with drying agent
are enclosed; see Fig. 35. Open the bags and replace the
used drying agent in the protective metallic hood on the oil-
side; Fig. 36. Discard the old drying agent. Check that the
seal for the metallic protective hood is in good condition
and properly fitted on the hood sealing surface; Fig. 37.
Reassemble the metallic hood to the flange at the oil side;
see Fig. 38. Tighten the screws for the hood with 50 Nm.
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34 Separate box in top of crate containing drying agent.
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36 Replace used drying agent in metallic hood.
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38 Reassemble protective hood with its drying agent.
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37 Check that sealing is fitted properly.
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35 Drying agent in plastic bag.