Overhead power lines with voltage up to 1 kV. Arrangement of wires on poles

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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Section 2. Sewerage of electricity

Overhead power lines with voltage up to 1 kV. Arrangement of wires on poles

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Encyclopedia of radio electronics and electrical engineering / Rules for the installation of electrical installations (PUE)

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2.4.27. On supports, any arrangement of insulated and uninsulated wires of overhead lines is allowed, regardless of the area of \uXNUMXb\uXNUMXbclimatic conditions. The neutral wire of overhead lines with bare wires, as a rule, should be located below the phase wires. Insulated outdoor lighting wires laid on VLI supports can be placed above or below the SIP, and also be twisted into a SIP bundle. Uninsulated and insulated outdoor lighting wires laid on overhead line supports should, as a rule, be located above the PEN (PE) conductor of the overhead line.

2.4.28. Devices mounted on supports for connecting electrical receivers must be placed at a height of at least 1,6 m from the ground.

Protective and sectioning devices installed on supports should be placed below the wires of the overhead line.

2.4.29. The distances between uninsulated wires on the support and in the span, according to the conditions of their convergence in the span with the largest sag up to 1,2 m, must be at least:

with a vertical arrangement of wires and an arrangement of wires with a horizontal displacement of not more than 20 cm: 40 cm in I, II and III regions on ice, 60 cm in IV and special regions on ice;
at other locations of wires in all areas on ice at wind speed on ice: up to 18 m / s - 40 cm, more than 18 m / s - 60 cm.

With the largest sag of more than 1,2 m, the indicated distances must be increased in proportion to the ratio of the largest sag to the sag of 1,2 m.

2.4.30. The vertical distance between insulated and non-insulated wires of overhead lines of different phases on a support at a branch from an overhead line and at the intersection of different overhead lines on a common support must be at least 10 cm.

The distance from the wires of the overhead line to any support elements must be at least 5 cm.

2.4.31. When jointly suspended on common supports of VLI and VL up to 1 kV, the vertical distance between them on the support and in the span at an ambient temperature of plus 15 ºС without wind should be at least 0,4 m.

2.4.32. When two or more VLIs are jointly suspended on common supports, the distance between the SIP bundles must be at least 0,3 m.

2.4.33. When jointly suspended on common supports of wires of overhead lines up to 1 kV and wires of overhead lines up to 20 kV, the vertical distance between the nearest wires of overhead lines of different voltages on a common support, as well as in the middle of the span at an ambient temperature of plus 15 ºС without wind, should be at least:

1,0 m - when hanging SIP with an insulated carrier and with all carrier wires;
1,75 m - when suspended with self-supporting insulated wire;
2,0 m - when hanging uninsulated and insulated wires of overhead lines up to 1 kV.

2.4.34. When hanging on common supports wires of overhead lines up to 1 kV and protected wires of overhead lines 6-20 kV (see 2.5.1), the vertical distance between the nearest wires of overhead lines up to 1 kV and overhead lines 6-20 kV on the support and in the span at a temperature of plus 15 ºС without wind should be at least 0,3 m for SIP and 1,5 m for uninsulated and insulated wires of overhead lines up to 1 kV.

See other articles Section Rules for the installation of electrical installations (PUE).

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