EBOOK - Product manual LTB 72.5-170D1B (ABB)


The circuit breaker consists of three separate circuit breaker poles, operating mechanism and link system.
Each circuit breaker pole consists of three main components:
• a mechanism
• a hollow post insulator with insulating pull-rod
• a breaking unit that consists of a breaking chamber insulator with attendant flanges and adapter plates. The interior of the breakingunit consists of a fixed upper and lower current path with integrated contact system and a moving puffer unit.
The circuit breaker poles are fitted to a pole beam. The supports consist of two welded halves that are linked with bolted cross stays.
The circuit breaker poles are linked using pull-rods that are sealed in protective tubes.


CONTENTS:

1 Product description, circuit-breaker 7
1.1 Description ...........................................................................................................................................................7
1.2 Breaking principle ................................................................................................................................................8
1.3 Standards ..............................................................................................................................................................9
1.4 Gas system and density monitor ......................................................................................................................10
1.5 Description, SF6-gas..........................................................................................................................................11
2 Product description, operating mechanism 13
2.1 Assembly ............................................................................................................................................................13
2.2 Control descriptions ..........................................................................................................................................14
2.2.1 Normal operation.......................................................................................................................................14
2.2.2 Tripping operation .....................................................................................................................................15
2.2.3 Closing operation ......................................................................................................................................16
2.3 Preconditions for different operations.............................................................................................................17
2.4 Component parts................................................................................................................................................19
2.4.1 Drive unit...................................................................................................................................................19
2.4.2 Latch device with coils ..............................................................................................................................20
2.4.3 Damper .....................................................................................................................................................21
2.4.4 Auxiliary contact........................................................................................................................................22
2.4.5 Heating element........................................................................................................................................23
3Safety 25
3.1 Introduction ........................................................................................................................................................25
3.2 General safety information................................................................................................................................26
3.2.1 Levels of safety risks.................................................................................................................................26
3.2.2 Hazardous working situations ...................................................................................................................28
3.2.3 Safety during maintenance .......................................................................................................................29
3.3 Safety related instructions ................................................................................................................................30
3.3.1 Warning - risk of crushing in the operating mechanism and link system ..................................................30
3.3.2 Discharging springs...................................................................................................................................31
4 Reference information 35
4.1 Oil types ..............................................................................................................................................................35
4.2 Types of grease ..................................................................................................................................................37
4.3 Locking fluid .......................................................................................................................................................39
4.4 Tightening torque ...............................................................................................................................................40
4.5 Requisite equipment, installation .....................................................................................................................41
4.6 Requisite equipment, maintenance ..................................................................................................................42
4.7 Requisite equipment, overhaul .........................................................................................................................43
4.8 Operating values ................................................................................................................................................44
5Delivery 45
5.1 Delivery inspection ............................................................................................................................................45
5.2 Storage prior to assembly .................................................................................................................................46
5.3 Lifting the pole beam .........................................................................................................................................48
5.4 Lifting the circuit breaker poles ........................................................................................................................49
5.5 Lifting the operating mechanism......................................................................................................................51
2012-05-11 1HSB429954-3en 4
6 Installation 53
6.1 Installation in short steps ..................................................................................................................................53
6.2 Foundations........................................................................................................................................................55
6.3 Assembly of support..........................................................................................................................................56
6.4 Assembly of support on the foundation ..........................................................................................................58
6.5 Assembly of pole beam on the support ...........................................................................................................60
6.6 Fitting the circuit breaker pole and protective tubes......................................................................................62
6.7 Installation of operating mechanism................................................................................................................68
6.8 Final assembly of the circuit breaker pole.......................................................................................................70
6.9 Fitting of rod system..........................................................................................................................................71
6.9.1 Preparations..............................................................................................................................................71
6.9.2 Fit the pull-rod between the operating mechanism and circuit breaker pole A1 .......................................72
6.9.3 Fit the pull-rod between pole C1 and pole B1...........................................................................................74
6.10 Assembly of gas monitoring system................................................................................................................78
6.11 Fitting of current transformers (option). ..........................................................................................................80
6.11.1 Fitting of CT bracket..................................................................................................................................80
6.11.2 Fitting of current transformers...................................................................................................................82
6.12 Electrical connections .......................................................................................................................................85
6.12.1 Connecting the circuit breaker's operating mechanism ............................................................................85
6.12.2 Fitting the rails or lines. .............................................................................................................................86
6.12.3 Charging of closing spring electrically.......................................................................................................87
6.12.4 Spring indicator .........................................................................................................................................88
6.13 Pressurizing of circuit-breaker poles ...............................................................................................................89
6.13.1 Preparations..............................................................................................................................................89
6.13.2 Gas filling with SF6-gas ............................................................................................................................91
6.13.3 Filling of mixed gas ...................................................................................................................................95
6.14 Inspection of bolt joints .....................................................................................................................................99
6.15 Assembling the indicator sign and cover ......................................................................................................100
6.16 Inspection prior to commissioning ................................................................................................................102
6.16.1 Tightness check ......................................................................................................................................102
7 Commissioning 103
7.1 Introduction ......................................................................................................................................................103
7.2 Pre-commissioning check list.........................................................................................................................104
8 Maintenance 107
8.1 Introduction ......................................................................................................................................................107
8.2 Description of maintenance categories .........................................................................................................108
8.3 Maintenance schedule .....................................................................................................................................109
8.4 Maintenance, circuit breaker pole ..................................................................................................................116
8.4.1 The service life of the circuit breaker ......................................................................................................116
8.4.2 The service life of the arcing contacts in the event of short circuit breaking ...........................................117
8.4.3 Cleaning and lubrication of circuit breakers ............................................................................................118
2012-05-11 5 1HSB429954-3en
8.5 Maintenance, operating mechanism and link system.................................................................................. 119
8.5.1 Preparatory measures and overview of the operating mechanism ........................................................ 119
8.5.2 Cleaning, lubrication, and rustprotection of operating mechanism........................................................ 121
8.5.3 Inspection of heating element................................................................................................................. 122
8.5.4 Inspection of drive unit............................................................................................................................ 123
8.5.5 Inspection of latch devices ..................................................................................................................... 125
8.5.6 Replacing a latch device......................................................................................................................... 127
8.5.7 Check of limit switch and auxiliary contact ............................................................................................. 128
8.5.8 Inspection of connection terminals ......................................................................................................... 130
8.5.9 Mechanical charging of closing spring.................................................................................................... 132
8.6 Rust protection ................................................................................................................................................ 134
9Overhaul 135
9.1 Preparations ..................................................................................................................................................... 135
9.1.1 Preparations for overhaul ....................................................................................................................... 135
9.1.2 Evacuation of SF6 gas ........................................................................................................................... 137
9.1.3 Cleaning and waste management .......................................................................................................... 138
9.2 Removal of circuit breaker pole for transport............................................................................................... 139
9.3 Overhaul of circuit breaker pole..................................................................................................................... 147
9.3.1 Removal of breaking unit........................................................................................................................ 147
9.3.2 Removal of post insulator ....................................................................................................................... 149
9.3.3 Overhaul of breaking unit ....................................................................................................................... 151
9.3.4 Inspection and replacement of contacts and Auto-PufferTM..................................................................154
9.3.5 Overhaul of mechanism.......................................................................................................................... 157
9.4 Assembling the circuit breaker pole following overhaul ............................................................................. 159
9.4.1 Treatment of contact surfaces ................................................................................................................ 159
9.4.2 Treatment of sealing surfaces and seals ................................................................................................ 161
9.4.3 Assembly of post insulator...................................................................................................................... 162
9.4.4 Assembly of breaking unit following overhaul......................................................................................... 164
9.4.5 Assembly of breaking unit on the post insulator ..................................................................................... 166
9.4.6 Setting the contact position .................................................................................................................... 169
9.4.7 Filling gas before transport ..................................................................................................................... 171
9.5 Replacement of breaking unit......................................................................................................................... 172
9.5.1 Dismantling of breakingunit for transport............................................................................................... 172
9.5.2 Assembly of breaking unit on the post insulator on site ......................................................................... 181
9.6 Installation of circuit breaker poles and commissioning............................................................................. 184
10 Disposal and environmental information 187
10.1 Disposal and recycling.................................................................................................................................... 187
10.2 Environment information, SF6 gas ................................................................................................................ 189
11 Spare parts 191
11.1 Introduction...................................................................................................................................................... 191
11.2 Circuit breaker pole ......................................................................................................................................... 193
11.2.1 Circuit breaker pole ................................................................................................................................ 193
11.2.2 Breaking unit........................................................................................................................................... 194
11.2.3 Contact set ............................................................................................................................................. 195
2012-05-11 1HSB429954-3en 6
11.2.4 Post insulator and insulatingpull-rod ......................................................................................................196
11.2.5 Mechanism..............................................................................................................................................197
11.2.6 Tripping mechanism................................................................................................................................198
11.2.7 Accessories.............................................................................................................................................199
11.3 Operating mechanism......................................................................................................................................202
11.3.1 Drive unit, complete with motor...............................................................................................................202
11.3.2 Motor .......................................................................................................................................................203
11.3.3 Spring housing ........................................................................................................................................204
11.3.4 Driver.......................................................................................................................................................205
11.3.5 Damper ...................................................................................................................................................206
11.3.6 Latch device ............................................................................................................................................207
11.3.7 Heating element......................................................................................................................................209
11.3.8 Electrical equipment................................................................................................................................210

LINK DOWNLOAD
M_tả

No comments: