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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.
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
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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
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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
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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
