UNIT, BUSNESS AREA AFL, Asset Management Lines OUR REFERENCE TR.05-20E DATE 2016-05-20 CONSULTATION TECHNICAL GUIDELINE REVISION 1 APPROVED Td Transmission Lines Designation system Introduction Designations in this document should be used to specify the placement of parts and component during inspection, reports and construction of overhead lines. This English text is to be regarded as a translation of the Swedish guideline. The Swedish text and the interpretation thereof shall govern the contract and the legal relations between parties. 1/20
Revision Notes Change notes Date 1 First issue 2015-12-21 2/20
Content 1 Main rules... 5 2 Tower leg... 6 3 Foundation and main member... 7 4 Stay... 8 5 Stay anchor termination... 9 6 Stay anchor... 9 7 Crossarm... 10 7.1 Shield wire crossarm... 10 7.2 Phase crossarm... 11 8 Conductor... 11 8.1 Shield wire... 11 8.2 Phase... 12 8.3 Phase conductor... 13 9 Damper... 13 10 Spacer... 14 11 Conductor joint... 15 3/20
12 Insulator set... 16 12.1 Suspension set... 16 12.2 Tension set... 16 12.3 Transposition set... 17 12.4 Insulator string... 18 12.5 Insulator element... 20 12.6 Jumper set... 20 12.7 Post insulator... 20 4/20
1 Main rules Overhead transmission lines and its parts shall be viewed in the line direction. Always from lower to higher tower number. Numbering of stays, foundation, tower legs, main member and insulator sets are based on the bisector line on the left and numbered sequentially clockwise. When multiple lines are built together in the same tower, crossarms and conductors are designated for the line it belongs to. 5/20
2 Tower leg Tower leg is designated: V=Left (Vänster) M=Middle (Mitten) H=Right (Höger) Tower leg who consist of more than one leg is numbered sequentially clockwise starting from the bisector line. 6/20
3 Foundation and main member Foundations and main members is designated in the same way as tower legs. V=Left M=Middle H=Right Foundations for tower leg with more than one foundation is numbered sequentially clockwise starting from the bisector line. 7/20
4 Stay Stays is designated. Leg, Function, No Leg = V, M, H Function = T topp stay, F fase stay, K buckling/support stay N0. = Tower leg with several stays with the same function the stays shall be numbered sequentially clockwise starting from the bisector line. For stay between tower legs the stay belongs to the leg which the upper end is attached to. 8/20
5 Stay anchor termination Stay anchor termination is designated as stays with the completion that for stay anchor termination at upper end of stays Ö is written after the code. Ö=Upper (Övre) Ex. VT1Ö 6 Stay anchor Stay anchor is designated as stays with the completion that for stay with common anchor for two or more stays all legs and functions are indicated. 9/20
7 Crossarm 7.1 Shield wire crossarm Shield wire crossarm is designated from left to right per transmission line. 10/20
7.2 Phase crossarm Phase crossarm is designated from left to right per transmission line. 8 Conductor 8.1 Shield wire Shield wire is designated from left to right from top to bottom per tower. 11/20
8.2 Phase Phase is designated from left to right per transmission line. 12/20
8.3 Phase conductor Phase conductor included in duplex, triplex or quadrupel configuration is designated with phase conductor No followed by conductor designation. Ex. 2c At angle towers shall one imagine that the insulator set is hanging free unloaded. Example: 9 Vibration damper Vibration damper is designated with No followed by which side of the tower it is mounted on. Number is designated away from the tower. 13/20
10 Spacer Spacer is designated with the number for the tower after the spacer followed by in line direction. Phase, group, spacer. Ex. Tower 37, Phase 2, Spacer 2b 14/20
11 Conductor joint Conductor joint is designated with the number for the tower after the joint followed by phase, conductor, No When it is only one joint in the span the joint No does not need to be mentioned. 15/20
12 Insulator set 12.1 Suspension set Suspension set is designated as phase. 12.2 Tension set Tension set is designated as suspension set followed by which side of the tower it is on. F=Before (Före) E=After (Efter) 16/20
12.3 Transposition set Transposition set is designated as Tension set. 17/20
12.4 Insulator string Suspension string Insulator string in suspension set is designated clockwise starting from the bisector line. 18/20
Tension and transposition string Insulator string in tension and transposition set is designated clockwise starting from a imagined horizontal line seen through center of the set in the line direction. 19/20
12.5 Insulator element Insulator element is designated starting from the tower. Insulator element in transposition set is designated in the element direction (normally from the nearest tower). 12.6 Jumper set Jumper set is designated as phase. When it is several jumper set in the same jumper the order is indicated with a, b, c in the line direction. 12.7 Post insulator Post insulator is designated as phase. When it is several post insulator in the same tower the order is indicated with a, b, c in the line direction. 20/20