JPH03282358A - Method and device for easily deciding corrosion on conductor of overhead distribution line - Google Patents

Abstract

PURPOSE:To decide the degree of corrosion on an overhead distribution line by measuring an electric resistance based on the degree of corrosion between conductors of the overhead wire to make it as basic data and comparing them with the electric resistance between both sides of the conductor on overhead distribution line. CONSTITUTION:An inserting groove 3 for conductor is formed in the clamping part 1a of clip A and a pair of conductive elastic bodies 4, 4' which are made to electrodes, are provided in the middle of groove through a cushion material 4a with constant intervals. Since insides of the elastic bodies 4, 4' are at first brought into contact with the conductor and the smooth contact is made over the entire surface. Then, the electric resistance based on the degree of corrosion in the part with certain length of the conductor of overhead wire is measured to make the relation between the amount of corrosion product and electric resistance as the basic data. Next, the corroded conductor of overhead distribution line is held with the clip A to measure the electric resistance corresponding to the corrosion producing amount, and the degree of corrosion of the overhead distribution line can be decided by comparing the measured value with the basic data.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a simple method for determining conductor corrosion of overhead distribution lines and an apparatus therefor.

[Conventional technology and its problems]

It has been a long time since the electrical conductors of overhead power distribution lines have been coated with insulating coatings using polyethylene or vinyl chloride compositions, but rainwater containing corrosive substances such as sulfides, such as acid rain, flows from the terminals or connections to electricity. Once the rainwater enters between the conductor and the insulating coating, the presence of the insulating coating prevents the rainwater from exploding and stagnates, corroding the conductor and causing it to progress.

For this reason, it is conceivable to periodically cut the overhead power distribution line to a predetermined length in certain sections and take samples, and then determine the degree of corrosion of the samples through chemical analysis, etc.; however, this method The wires must be cut and rewired, which poses a major problem in terms of maintenance, preservation, and economy.

SUMMARY OF THE INVENTION In view of the above situation, it is an object of the present invention to provide a method and apparatus for easily determining conductor corrosion without cutting the overhead distribution line.

[Means to solve the problem]

In order to solve the above problems, the determination method according to the present invention measures the electrical resistance based on the degree of corrosion between the fixed length conductors of the electric wires that are strung together, uses it as basic data, and The configuration is such that the resistance between both ends of the certain length conductor is measured, and the measured value is compared with the basic data to determine the degree of corrosion of the overhead power distribution line.

Further, the determination device according to the present invention includes a clip in which a pair of electrodes that sandwich a conductor of an overhead power distribution line are arranged at a constant interval, a lead wire that connects the two electrodes, and an intervening wire that connects the two electrodes. The clip includes a resistance meter and a power source, and the conductor-holding electrodes of the clip are made of a conductive elastic body.

In the case of this device, said fixed interval corresponds to the fixed length of said method.

The fixed length of the conductor in the above basic data can be, for example, several meters, between the connections or terminals of an overhead distribution line, while it can also be, for example, several centimeters between the electrodes of a clip, and its definition The relationship between the degree of corrosion and electrical resistance over a certain length is determined by actual measurements on actual overhead distribution lines or laboratory measurements, and this data is used as basic data.

[Effect]

According to the present invention, the electrical resistance corresponding to the amount of corrosive substances is reduced by sandwiching the corroded conductor between clips in which a pair of electrodes made of an elastic conductor are arranged at regular intervals. The state of corrosion is determined by comparing the measured value with basic data. At this time, by using an elastic conductor as the electrode, variations in measurement results can be suppressed.

In addition, clips are connected to the conductors at the connection or terminal ends of the measuring length of the overhead distribution line to form a closed circuit of the conductor, clip, lead wire, ohmmeter, power supply, lead wire, clip, and conductor. Measure.

〔Example〕

First, as shown in FIG. 1, the clip A connects both handles 1.1 with a pin 2, and is always maintained in a clamped state by a spring 5 fitted into the pin 2. The clamping part 1a has an insertion groove 3 for the conductor a, and a pair of conductive elastic bodies 4.4' serving as electrodes are provided in the middle thereof at a constant interval (for example, an inner interval of 12 m) via a cushion material 4a. It is being

This elastic body 4.4' is a mixture of low density polyethylene and 30% Ketchen Black (Lion Act product name) (volume resistivity 10°ΩC11), or Pabiostan (Tokyo Ink product name), etc. can be adopted, and its inner surface protrudes from the other insertion grooves 3. Therefore, when the conductor a is held, the elastic body 4.4' first comes into contact with the conductor a and follows its front surface. In other words, smooth full-surface contact is achieved.

The elastic body 4.4' is provided on the lower handle 1 and has lead wires connected thereto, and a resistance meter B and a power source E are connected to the lead wires.

This embodiment has the above configuration, and next, the overhead distribution line (
Corroded conductor a (60wl1t19/2.0m) was held between clips A of this example, its electrical resistance was measured, and the amount of corrosion formed on conductor a was chemically analyzed, and the relationship between the two is shown in Figure 2. Using this as basic data, the degree of corrosion of the overhead power distribution line P is measured and determined by comparing it with the actual measured value.

As shown in FIG. 3, another method of discrimination according to the present invention is to strip off the insulation of the overhead distribution line P at intervals of, for example, 1 m, and separate the electrodes 4.4' into chive clips A. , and hold the exposed conductor a with the clip A,
Discrimination can also be made by measuring the resistance between them.

Incidentally, when a copper plate was used for the electrode, the measurement data varied and it was not possible to obtain an appropriate relationship between the amount of corrosion generated and the electrical resistance. This is due to the fact that the clamping part is just a cylindrical part, so the cylindrical surface may come into close contact with the uneven surface of the twisted conductor, and the coating of corrosion products may be destroyed during clamping, resulting in a change in resistance. I think this is due to the following reasons.

[Effects of the Invention] The present invention is configured as described above, and corrosion of the conductor can be easily determined without cutting the overhead power distribution line. It will be very advantageous.

[Brief explanation of drawings]

Fig. 1 is a schematic perspective view of an embodiment of the simple conductor corrosion determination device for overhead distribution lines according to the present invention, Fig. 2 is a relationship diagram between the amount of corrosion products and electrical resistance, and Fig. 3 is a diagram showing the simple corrosion determination method. FIG. 1...Handle, 1a...Holding part, 2...Pin, 3...
Insertion groove, 4.4'... Conductive elastic body (1 pole),
5... Spring, A... Crimp, B... Resistance meter, E...
Power supply, P... Overhead distribution line, a...
Conductor, b...Lead wire.

Claims (2)

[Claims] (1) Measure the electrical resistance based on the degree of corrosion between the fixed length conductors of the electric wires being spanned, use it as basic data, measure the resistance between both ends of the fixed length conductor of the overhead distribution line, and measure the measured value. and the basic data to determine the degree of corrosion of the overhead power distribution line. (2) Consisting of a clip in which a pair of electrodes that hold the conductor of an overhead power distribution line are arranged at regular intervals, a lead wire that connects the two electrodes, and a resistance meter and a power source that are interposed in the lead wire, An apparatus for determining conductor corrosion of an overhead power distribution line, characterized in that the conductor-clamping electrode of the clip is made of a conductive elastic body.