Guide to the Installation of Overhead Transmission Line Conductors

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Contents
1. Overview..............................................................................................................................................
1.1 Scope............................................................................................................................................ 1
1.2 Purpose......................................................................................................................................... 1
1.3 Application................................................................................................................................... 1
2. References............................................................................................................................................
3. Definitions and cross reference of terminology...................................................................................
3.1 Definitions and terminology for conductor stringing equipment ................................................ 2
3.2 Acronyms................................................................................................................................... 21
4. Conductor stringing methods.............................................................................................................
4.1 Slack or layout method .............................................................................................................. 22
4.2 Tension method.......................................................................................................................... 22
5. Grounding equipment and methods...................................................................................................
5.1 Protective grounding principles ................................................................................................. 23
5.2 Protection of personnel .............................................................................................................. 23
5.3 Hazards and electrical concepts ................................................................................................. 24
5.4Grounding equipment, methods, and te.s.t..i.n..g...................................................................... 24
5.5 Transmission line construction grounding systems ................................................................... 34
6. Communications ................................................................................................................................
7. Conductor reels ..................................................................................................................................
7.1 Reel types................................................................................................................................... 40
7.2 Reel handling ............................................................................................................................. 40
8. Special requirements for mobile equipment ......................................................................................
8.1 Reel stand................................................................................................................................... 40
8.2 Helicopter................................................................................................................................... 41
8.3 Tensioner bullwheel characteristics........................................................................................... 41
8.4Puller and tensioner operating character.i.s..t.i.c..s.................................................................... 43
8.5 Pilot line winder operating characteristics................................................................................. 44
9. Travelers ............................................................................................................................................
9.1 Sheave diameter ......................................................................................................................... 44
9.2 Configuration of groove............................................................................................................. 45
9.3 Bearings ..................................................................................................................................... 46
9.4Material and construction.......................................................................................................... 46
9.5 Lining......................................................................................................................................... 47
9.6 Electrical characteristics ............................................................................................................ 47
9.7 Bundled configurations.............................................................................................................. 47
9.8 Helicopter travelers.................................................................................................................... 48
9.9 Uplift rollers and hold-down blocks .......................................................................................... 4 8
9.10 Traveler suspension ................................................................................................................... 49
10. Typical procedures for stringing operations ......................................................................................
10.1 Pull, tension, anchor, and splicing sites ..................................................................................... 49
10.2 Section between snub structures ................................................................................................ 51
10.3 Conductor splicing ..................................................................................................................... 52
10.4Stringing procedures .................................................................................................................. 54
10.5 Sagging procedures.................................................................................................................... 60
10.6 Deadending precautions............................................................................................................. 65
10.7 Clipping-in ................................................................................................................................. 65
10.8 Damper installation.................................................................................................................... 66
10.9 Spacer and spacer damper installation....................................................................................... 66
11. Special conductors .............................................................................................................................
11.1 ACSS—steel supported aluminum conductor ......................................................................... 67
11.2 T-2 Conductor—twisted bare conductors................................................................................ 67
11.3 Self-damping conductor (SDC) ................................................................................................. 69
11.4Composite overhead groundwire with optical fibers (OPGW....).............................................. 70
11.5 All-dielectric self supporting fiber cable (ADSS) ..................................................................... 71