JPH049776A - Device for detecting deterioration of lightning arrester - Google Patents

Abstract

PURPOSE:To eliminate the need for visual monitoring and a power supply at a location where a lightning arrester is to be installed and enable transmission to be made easily by placing a pair of light path members near a working surface of a needle of a current measuring equipment for monitoring. CONSTITUTION:Optical fibers 2 and 3 are provided, crossing a surface where a needle 4 of a current measuring equipment 1 operates due to leak current caused by deterioration of a lightning arrester 9. Then, under normal conditions, light propagated through the fiber 2 from a light-emitting part 6 is transmitted on a working surface, enters the fiber 3, and then is propagated to a detection part 7. Also, when the lightning arrester 9 deteriorates, the needle 4 swings to the right side in figure due to increase in leak current, thus enabling light path between the fibers 2 and 3 to be shielded by a shielding plate 8 of the needle 4. As a result, deterioration of the lighting arrester 9 can be detected by loss of light due to the fiber 3, thus eliminating the need for visual monitoring and a power supply at a location where the lightning arrester 9 is to be installed. Also, transmission can be eased by using an optical fiber with improved transmission properties.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to a deterioration detection device for a lightning arrester, and particularly to a deterioration detection device for a lightning arrester installed at a remote location such as on a steel tower.

B9 Summary of the Invention The present invention is a device for detecting deterioration of a lightning arrester by monitoring leakage current of the lightning arrester. It is inexpensive, does not require visual monitoring or power supply, etc.
Moreover, it is possible to detect deterioration of lightning arresters with easy transmission.

C. Conventional technology Conventionally, to detect the deterioration of a lightning arrester, a rectifying ammeter is used, and a device that monitors the leakage current by visually detecting the deflection position of the pointer or using a meter relay contact, and a device that monitors the leakage current by detecting the deflection position of the pointer visually or using a meter relay contact. etc., and amplify it through an amplifier circuit,
A device is used in which the signal is subjected to processing such as signal processing and display, and then guided to a leakage current detection device via a transmission cable for monitoring.

D9 Problems to be Solved by the Invention The deterioration monitoring device configured as described above requires judgment by human eyes at the location where the lightning arrester is installed in order to recognize the magnitude of leakage current based on the deflection of the pointer of the leakage current measuring device. Furthermore, when detecting and amplifying leakage current, a power source for processing such as waveform separation is required at the location where the lightning arrester is installed.

However, in an isolated location such as on a steel tower, it is extremely difficult to perform constant visual monitoring, and it is also difficult to provide a regular power supply necessary for waveform separation, etc., making it difficult to apply the above-mentioned deterioration monitoring device.

Furthermore, the above-mentioned deterioration monitoring device requires high labor costs, equipment costs, etc., and transmission is not easy.

The present invention was made against this background, and it is an object of the present invention to provide a deterioration detection device for a lightning arrester that does not require visual monitoring or a power source at the location where the lightning arrester is installed, is inexpensive, and is easily transmitted.

E7 Means for Solving the Problems In order to solve the above problems, the present invention provides an incident optical path member and a light receiving optical path member for receiving light from here.
Each end face is positioned and arranged so as to face the operating surface, and the amount of light received by the light receiving optical path member changes when the pointer reaches the optical path of the light from the incident optical path. It is characterized by

F1 action In the deterioration detection device for a lightning arrester configured as described above, light is incident from the incident optical path member to the receiving optical path member to form an optical path between both optical path members, and when the arrester deteriorates, the leakage current value increases. When the pointer changes and reaches the optical path, the light receiving unit detects a change in the amount of light and detects deterioration of the lightning arrester.

G. Embodiment FIG. 1 shows the overall configuration of an embodiment of the present invention, and FIG. 2 shows the main parts of the embodiment.

In this embodiment, both the front and back sides of the window 5 for monitoring the pointer 4 of the current measuring unit 1 are made of transparent glass plates or the like so that light can pass through from the front side to the back side of the window. A pair of input optical fibers 2 and a pair of light receiving optical fibers 3 are arranged on the back side.

The positional relationship between the optical fiber 2.3 and the current measuring device is such that it is perpendicular to the operating surface of the pointer 4 (the area in which the pointer 4 swings) and is perpendicular to the pointer 4 when a current that is determined to have deteriorated the lightning arrester flows. Both optical fibers 2.3 are installed on a straight line so as to face each other closely across the operating surface.

Furthermore, a light emitting section 6 and a detecting section 7 are connected to the optical fibers 2.3, respectively, as shown in FIG.

With the above configuration, under normal conditions, light propagated from the light emitting section 6 through the optical fiber 2 passes through the operating surface, enters the optical fiber 3, and is propagated to the detection section 7.

However, if the lightning arrester deteriorates, the leakage current increases and the pointer 4 of the current measuring device l swings to the right in the figure, which blocks the optical path between the optical fibers 2 and 3, and as a result, the pointer 4 on the detection side Light disappears in the optical fiber 3, and deterioration of the lightning arrester is detected.

In the above device, it is preferable to attach a blocking plate 8 on the zero point side of the pointer 4 to cover the fan-shaped area where the pointer 4 scratches when current flows, so that the pointer 4 can be further deflected after blocking the optical path. There is no need to cancel the blocking, and the optical path is securely blocked.

As a modification of this embodiment, the optical fibers 2 and 3 are both installed on the same side with respect to the operating surface of the pointer 4, the surface of the window portion 5 is mirrored to reflect the optical path, and the pointer 4 and the blocking plate 8 are It is also possible to perform detection by blocking the optical path, and
Similarly, it is also possible to perform detection by installing the optical fibers 2 and 3 on the same side with respect to the operating surface of the pointer 4 and reflecting the light by the pointer 4 and the blocking plate 8.

It is also possible to provide multiple sets of optical fibers to perform stepwise detection of leakage current.Furthermore, by providing an appropriate member on the optical fiber 2 to expand the optical path in the operating direction of the pointer 4, the pointer 4 can be
It is also possible to make the amount of deflection of the pointer 4 correspond to the amount of light using the blocking plate 8, send the light to the detection device through the optical fiber 3 using an optical path converging member, etc., and measure the value of the leakage current from this amount of light.

H5 Effects of the Invention According to the present invention, a pair of optical path members are arranged near the operating surface of the pointer of a current measuring device, and leakage current is monitored by detecting the deflection position of the pointer by, for example, blocking light. Because there are
There is no need for visual monitoring or power supply at the lightning arrester installation location.

Therefore, the device of the present invention has the advantage that it can be applied to places where constant visual monitoring is difficult, such as on top of steel towers, and to isolated places where it is difficult to obtain a regular power supply.

In addition, personnel costs, equipment costs, etc. are reduced, resulting in lower costs, and since optical fibers have excellent transmission properties, transmission becomes easier.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram showing one embodiment of the present invention, and FIG.
It is a perspective view of the current measurement part in a figure. l...Current measuring device, 2.3...Optical fiber, 4...
・Pointer, 5. Window part, 6... Light emitting part, 7... Detection part,
8. Breaking plate, 9 Lightning arrester. Fig. 1 Configuration of an embodiment of the present invention Two people not shown in the diagram

Claims (1)

[Claims] (1) In a device that measures the magnitude of the leakage current of a lightning arrester using a current measuring device and detects the presence or absence of deterioration of the lightning arrester based on the deflection of the pointer of the current measuring device, an incident optical path member and a The light receiving optical path member for receiving the light of A deterioration detection device for a lightning arrester, characterized in that the device is arranged in such a way that the amount of light received changes.