Dismantling The Breaking Unit - ABB SF6 LTB 245E1 BLG 1002A Product Manual

Dismantling the circuit-breaker pole

5.4 Dismantling the breaking unit

16
Plan the dismantling work so that it can be carried out quickly and without long
delays to prevent moisture in the air coming into lengthy contact with the dust in the
breaking unit and on the inside and outside of the breaking chamber insulator.
N. B. Use personal safety equipment such as overalls, protective gloves and face
mask.
Take care of the decomposition products in the breaking unit, in the form of powder,
as the breaking unit is successively opened. First use a vacuum cleaner and
thereafter carefully wipe the dismantled components.
1. Remove the bolts (1) and the cover (2) and lift
out the absorption agent container (3).
N. B. Place the bag with absorption agent in a
container for chemical waste.
2. Remove the bolts (4) and upper flange (5) with
the upper current path (6).
3. Remove the bolts (4) and the breaking chamber
insulator (7) from the lower flange (8).
4. Rinse the inside of the breaking chamber
insulator with water.
Item
1 Bolts M12x35
Washers 13x28x3
2 Cover
3 Absorption agent container
4 Bolts M12x50
Washers 13x28x3
5 Upper flange
6 Upper current path
7 Breaking chamber insulator
8 Lower flange
Figure 5-4. Dismantling the breaking unit.
The main components of the breaking unit are now accessible for inspection,
cleaning and replacement of burnt or damaged components.
Overhaul Instructions
1
5
6
8 pcs.
8 pcs.
7
16 pcs.
16 pcs.
8
B10059
1HSB435409-201 enrev1
4
3 2
4