Overhead power lines with voltage above 1 kV. Crossing, approaching or parallel following overhead lines with trolleybus and tram lines

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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 above 1 kV. Crossing, approaching or parallel following overhead lines with trolleybus and tram lines

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

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2.5.264. The angle of intersection of overhead lines with trolleybus and tram lines should be taken close to 90º, but not less than 60º.

2.5.265. When crossing trolleybus and tram lines, the overhead line supports limiting the crossing span must be anchored with a normal design.

For overhead lines with wires with a cross-sectional area of \u120b\u2bthe aluminum part of 50 mm2 or more or with steel ropes of the TK type with a cross section of XNUMX mmXNUMX or more, intermediate supports with suspension of wires in blind clamps or with double fastening on pin insulators are also allowed.

In the case of using anchor supports on overhead lines with suspension insulators and an unsplit wire in a phase with a cross-sectional area of \u120b\u2bthe aluminum part of XNUMX mmXNUMX or more, the tension garlands of insulators for the wire must be double-circuit with separate fastening of each circuit to the support.

When constructing new trolleybus and tram lines and passing them under the existing 500 kV overhead lines, the reconstruction of the overhead line is not required if the smallest distances are maintained in accordance with Table. 2.5.36.

For VLZ with wires with a cross-sectional area of \u120b\u2bthe aluminum part of XNUMX mmXNUMX or more, it is allowed to use intermediate supports with reinforced fastening of protected wires.

2.5.266. The smallest distances from the wires of the overhead line when crossing, approaching or parallel following with trolleybus and tram lines in the normal mode of operation of the overhead line should be taken not less than those given in table. 2.5.36:

at the highest air temperature without taking into account the heating of the wire by electric current;
at design linear ice load according to 2.5.55 and air temperature at ice according to 2.5.51.

The vertical distances from the wires of the overhead line with a cross-sectional area of \u185b\u2bthe aluminum part are less than 2.5.36 mmXNUMX at the intersections with wires or carrier cables of a trolleybus or tram line should be checked in emergency mode for a break in the overhead line wire in an adjacent span at an average annual air temperature without taking into account the heating of the wires by electric current. In this case, the distances must be at least those given in Table. XNUMX.

When approaching overhead lines of 110 kV and above with trolleybus and tram lines, the distances between their wires and measures to protect against influence must be determined in accordance with building codes and regulations for tram and trolleybus lines.

Table 2.5.36. The smallest distances from the wires of overhead lines when crossing, approaching or parallel following with trolleybus and tram lines

Intersection, approach or parallel following	The smallest distance, m, at voltage VL, kV
Intersection, approach or parallel following	Until 20	35-110	150-220	330	500
Vertical distance from overhead lines:
a) when crossing with a trolleybus line in the normal mode of the overhead line:
- up to the highest mark of the carriageway	11	11	12	13	13
- up to the wires of the contact network or carrying cables	3	3	4	5	5
b) at the intersection with the tram line in the normal mode of the overhead line:
- up to the rail head	9,5	9,5	10,5	11,5	11,5
- up to the wires of the contact network or carrying cables	3	3	4	5	5
c) in the event of a break in the overhead line wire in the adjacent span to the wires or load-bearing cables of the trolleybus or tram line	1	1	2	2,5	-
Horizontal distance when approaching or parallel following:
a) from the extreme non-deflected wires of the overhead line to the supports of the trolleybus and tram contact networks	Not less than the height of the support
b) from the extreme wires of the overhead line with their greatest deviation to the supports of the trolleybus and tram contact networks in areas of a cramped route	3	4	6	8	10
c) from the extreme non-deflected wires of the overhead line to the stopping points of trams and trolleybuses, turning rings with working tracks, sludge, overtaking and repair	10	20	25	30	30

2.5.267. Protection of intersections of overhead lines with a contact network is carried out by protective devices in accordance with the requirements given in 2.5.229.

It is allowed to place the wires of the crossing overhead line above the supports of the contact network at vertical distances from the wires of the overhead line to the top of the supports of the contact network at least: 7m - for overhead lines with voltage up to 110 kV, 8 m - for overhead lines 150-220 kV, 9 m - for overhead lines 330- 500 kV.

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