ABB SF6 LTB 245E1 BLG 1002A - List of

Overhaul Instructions
1HSB435409-201 enrev1 i
LIST OF CONTENTS
1. General ............................................................................... 1
2. Safety................................................................................... 3
2.1 Warning text................................................................................... 3
2.2 Safety directives............................................................................. 4
3. Overhaul, general ............................................................... 7
3.1 Tools............................................................................................... 7
3.2 Gas handling equipment................................................................. 7
3.3 Personal safety equipment.............................................................. 7
3.4 Cleaning equipment ....................................................................... 7
3.5 Spare parts...................................................................................... 8
3.6 Test equipment ............................................................................... 8
3.7 Premises ......................................................................................... 8
4. Dismantling the circuit-breaker......................................... 9
4.1 General........................................................................................... 9
4.2 Gas................................................................................................ 10
4.3 Cleaning and waste disposal ........................................................ 11
4.4 Dismantling the circuit-breaker pole for transport....................... 12
5. Dismantling the circuit-breaker pole .............................. 13
5.1 Dismantling the tripping mechanism’s pull-rod........................... 13
5.2 Removing the breaking unit......................................................... 14
5.3 Removing the post insulator......................................................... 15
5.4 Dismantling the breaking unit...................................................... 16
6. Contact and puffer replacement ..................................... 17
6.1 Inspection of the upper current path............................................. 17
6.2 Inspection of the puffer ................................................................ 18
6.3 Inspection of the lower current path............................................. 19
7. Overhaul of the mechanism ............................................ 21
8. Assembling the circuit-breaker pole .............................. 23
8.1 Treatment of contact surfaces ...................................................... 23
8.2 Treatment of sealing surfaces and seals....................................... 24
8.3 Assembling the breaking unit....................................................... 25
8.4 Assembling the post insulator...................................................... 26
8.5 Assembling the circuit-breaker pole ............................................ 27