Tag:line_arrangement=delta
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 line_arrangement = delta
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| Description |
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Bundles of the line are located on vertices of an isosceles triangle shape which base is not always horizontal. 
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| Group: infrastructure |
| Used on these elements |
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| Useful combination |
Status: approved
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| Tools for this tag |
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For general knowledge about lines, bundles and arrangements, please refer to line_arrangement=* page for global guidelines.
As per IEC 466-05-05, bundles of the line are located on vertices of an isosceles triangle shape which base is not always horizontal.
It could be also called trefoil sometimes, particularly underground.
Examples
Overhead power
| Photo | Location | Tagging | Note |
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UK |
power=tower
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A new kind of power tower in UK, with a special design of T-shape. Two 3 phases circuits are suspended on those supports. As the triangle formed by insulators for each circuits looks like isosceles, we use delta value here.
As for the diamond transition/termination ones of the same design:
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Underground power
| Photo | Location | Tagging | Note |
|---|---|---|---|
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New Zealand |
On any node of this cable with that exact arrangement: line_arrangement=delta |
Three underground power cables installed in black ducts, arranged in a delta shape. Orange ducts may be optical fibre or telecom wires. This example only covers the black ducts. |