Mounting steps (continued) :
24. Shorten operating rod (71) so that, during a manual test operation, all the rear contact fingers are
up against the stop in the ON position.
25. Check distance between contact finger (20) and stop (21). the distance on one pole of 3-pole
group must not be more than 5 mm Figure 64
26. If necessary, correct the contact of the contact fingers by adjusting operating rod (71) and check
by means of test operation
27. Tighten lock nuts (338) on the operating rod (left-, right-hand thread!) A Figure 51, Figure 52
28. Tighten locking screw in earthing-switch lever (19) and secure withlock nut
29. Drill hole throught T-type clamp (329) and earthing - switch shaft (337) ( 12 mm - H12)
A Figure 46 (Detail 2)
30. Grease bore hole with silicone grease and drive home stainless clamp sleeve (430-350)
A Figure 46
31. Set earthing switch to the ON position
32. Loosen bolts (340) on the T-type clamp and re-tighten A Figure 46, so that contact fingers (20)
are uniformly up against earthing contact (18) A Figure 62
33. Treat contact finger (20) A Figure 46 and earthing contact (18) A Figure 62
34. For rated voltage 245 ... 300 kV : Mount support for tubular contact arm (23)
35. In case of mechanical interlocking : Next step : A Chapter 15 : Mounting of Mechanical
Interlocking
36. Next step : A Chapter 16 : Commissioning
A
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1HDB 050016-YN-A
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