Manual Tightening Of The Draw-Rod Nut - ABB GOE Series Installation And Commissioning Manual

Transformer bushing
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11.
Measure the value (c) and (X1), record it for future
reference.
Keep the document with the substation
documentation.
End of instruction

4.9 Manual tightening of the draw-rod nut

Overview
This procedure requires the draw-rod nut and threads of the draw rod to be correctly lubricated. The draw rod
will not get the correct tension if the fasteners are not correctly lubricated, this can cause the bushing to fail.
If possible, ABB recommends that the draw rod is hydraulically tightened, refer to Hydraulic tightening of
the draw-rod nut, page 49.
Procedure
1.
Make sure that the draw-rod nut, and threads of the draw rod are correctly lubricaded, and that the
draw-rod nut is tightened to 10 Nm.
2.
Measure the distance (a).
Installation and commissioning guide
2750 515-1 EN, REV. 14, 2020-06-26
53

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