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Overhaul Instructions
TIGHTENING TORQUE
45 Nm
1HSB435409-201 enrev1
9.
Fit the absorption agent container (12) and the cover (10) and tighten the bolts
(11) to a torque of 45 Nm.
Item
1
Pin
2
Washer
3
Circlip
4
Operating insulator
5
Bolt M12x 35
Washer 13x28x3
6
Breaking unit
7
Puffer pull-rod
8
Post insulator
9
Upper flange
10
Cover
11
Bolt M12x35
Washer 13x28x3
12
Absorption agent
container
Figure 9-2. Assembling the breaking unit.
10. Filling the circuit- breaker pole with gas.
a.
Vacuum-pump down to 100 Pa and let pumping continue for at least one
hour after this pressure has been reached.
b.
Stop the vacuum pumping and fill the circuit-breaker with dry and pure
nitrogen gas to atmospheric pressure. Allow it to stand for a few hours or
over-night.
c.
Vacuum-pump again down to 100 Pa and fill with pure SF
pressure of 0.125 MPa (abs).
Store filling hoses so that they are not exposed to moisture or contamination. They
must not be used other than for their intended purpose.
Dismantling the breaking unit for transport
11
12
9
6
5
8
B10156
10
7
3
1
2
4
230-235
gas to a
6
33
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