JPS6120833Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to improvements in high voltage overhead transmission lines.

Generally, high-voltage overhead power transmission lines use heat-resistant copper stranded wire.
Although ACSR, ultra-heat resistant ACSR, etc. are used, the sag of overhead power transmission lines increases due to temperature rise and ice and snow adhering to the power transmission lines 8, as shown by the dotted line in FIG. Therefore, there was a problem that the steel tower 7 had to be made taller, which increased the construction cost, and if the sag was reduced, a large tension would be applied to the wire support points, making it impossible to increase the power transmission capacity from the standpoint of safety factor.

In view of the above points, the present invention involves suspending a suspension wire with high mechanical tensile strength, such as steel stranded wire, between the steel towers, and suspending a power transmission line from this suspension wire by suspending multiple insulating spacers and one conductive spacer. This method solves the problems of the conventional method, and an embodiment of the same will be explained below with reference to the drawings. In FIG. Hanging wire with high mechanical tensile strength, 2 is the hanging wire 1
A power transmission line is suspended by a plurality of insulating spacers 5 and a spacer 6 made of one conductor, and one conductive spacer 6 among the spacers suspending the power transmission line 2 connects the power transmission line 2 and the suspended line 1. The plurality of insulating spacers 5, which suspend electric wires made of other insulators, etc., are installed to maintain the same potential, and are installed at predetermined locations to prevent damage to the electric wires 2 and hanging wires 1 due to lateral vibration of the power transmission line, etc. They are firmly attached to the power transmission line 2 at intervals of .

According to the present invention, by installing the overhead power transmission line as described above, no current flows through the suspension wire 1, so the suspension wire does not loosen due to temperature rise, and the transmission line 2 has a tensile strength. It is installed on a large hanging wire 1 through multiple spacers 5 so that almost no tension is applied to it, and it is not only a commonly used power transmission line, but also annealed aluminum stranded wire conductor with excellent power transmission rate is used for the power transmission line. The power transmission current capacity can be greatly increased because there is no loosening even when the wire 1 is connected to the power transmission line 2 through the conductive spacer 6, and since the suspension wire 1 is connected to the power transmission line 2 with the conductive spacer 6 and has the same potential as the power transmission line, It has many excellent advantages such as there is no risk of partial discharge and no damage caused by electrostatic induced voltage.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing a conventional overhead power transmission line, and FIG. 2 is an explanatory diagram showing an embodiment of the overhead power transmission line of the present invention. 1: Suspension wire, 2: Power transmission line, 3: Steel tower, 4: Insulator link, 5: Insulating spacer, 6: Conductive spacer.

Claims (1)

[Scope of utility model registration request] An overhead power transmission line characterized in that a suspension wire with high mechanical tensile strength is insulated and supported between steel towers, and a power transmission line is attached to the suspension wire using a plurality of insulating spacers and one conductive spacer.