JPH04283669A - Locating device for fault point of gas-insulated machinery and apparatus - Google Patents

Abstract

PURPOSE:To diagnose easily and frequently whether a fault point locating device locates a fault section out of a plurality of sections screened by insulation spaces when a flashover fault occurs in a gas-insulated apparatus operates properly or not. CONSTITUTION:A diagnosis light which is emitted from a short-circuiting light detection part 3A is received by an accident monitoring device 1A and the presence is judged, thus enabling whether a fault point locating device operates properly or not. For obtaining the diagnosis light, a method for obtaining a fluorescent light by emitting a counterlight diagnosis light to a fluorescent substance 35 and a method for obtaining a reflection light at a reflection part are available. With the counterlight diagnosis light, a method for transmitting the counterlight diagnosis light which is emitted from a light-emitting device 182 which is provided at an accident monitoring device 1A to a short-circuiting light detection part 3A using an optical fiber for diagnosis 23 which is provided in parallel with an optical fiber for receiving light 22A and a method for providing a penetration hole at the short-circuiting light detection light 3A and then allowing the counterlight diagnosis light to enter it are available.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] This invention is applicable to gas insulated switchgear devices called GIS and gas insulated cables called GIC, which are partitioned by insulating spacers to form a plurality of sealed compartments. The present invention relates to a failure point locating device that detects internal flash light in each section of gas-insulated equipment and locates the section where a flash fault has occurred.

0002

[Prior Art] Gas insulated equipment such as GIS and GIC is important equipment for the transportation of electricity, and in the unlikely event that a failure such as a ground fault or phase-to-phase short circuit occurs inside these gas insulated equipment, it must be immediately removed. It is requested that it be restored. To this end, these devices are completely sealed and, as mentioned above, are internally divided into multiple compartments by insulating spacers, so in the event of a failure, it is desirable to accurately locate the compartment. As a failure point locating device for this purpose, a system that optically detects flash light generated when a ground fault occurs inside gas-insulated equipment is in practical use.

[0003] Generally, the probability that the above-mentioned failure will occur is extremely small, so if the failure point locating device operates, a function is required to constantly diagnose whether the failure point locating device is healthy in order to ensure its reliability. is important.

FIG. 10 is a circuit diagram and a sectional view showing a conventional failure point locating device for gas insulated equipment. In this figure, a light-receiving optical fiber 2 drawn out from a flashlight detection unit 3 provided in a sealed container 100 as one of the compartments constituting a gas-insulated device is guided to an accident monitoring device 1.

The accident monitoring device 1 includes a light receiving section 11 such as a photodiode that receives light guided by a light receiving optical fiber 2 and converts it into an electrical signal, an amplifier 12 that amplifies the output signal,
The input side of the comparator 13 that outputs a signal only when the strength of the signal exceeds a predetermined voltage value V1, the waveform shaper 14 that shapes the waveform of its output, the signal output section 15 that outputs the result, and the amplifier 12 A diagnostic signal generating section 16 provided in
It consists of

The light-receiving optical fiber 2 consists of an optical fiber 21 and a coating 22 that prevents light from entering from the outside.One end is a light-receiving section 11, and the other end is a flashlight detecting section 3.
is inserted into.

The flash light detection section 3 is a part that extracts the flash light generated inside the sealed container 100 from a through hole provided in the sealed container 100, and is a ring-shaped mounting flange attached to the sealed container 100 by welding. 33, light guide glass 32 fitted into the central through hole of this mounting flange 33
, an airtight flange attached to the mounting flange 33 with bolts 37, an optical fiber terminal part 31 to which the end of the receiving optical fiber 2 is attached with bolts 36, and packings 38 and 39 for maintaining airtightness. There is.

When flash light is generated within the sealed container 100, the flash light enters the light receiving optical fiber 2 through the light guiding glass 32 either directly or by being reflected from the inner wall of the sealed container 100. This flash light is transmitted through the light-receiving optical fiber 2, received by the light-receiving section 11 of the accident monitoring device 1, and converted into an electrical signal with an intensity proportional to the intensity of the light. This electric signal is amplified by an amplifier 12 to a strength that is easy to process, and is passed through a comparator 13 that detects only flashlight.When a flashlight is detected by a waveform shaper 14, the signal becomes High, and when no flashlight is detected, the signal becomes Low. 2
It is converted into a value signal, outputted from the signal output section 15, and the location result is outputted as a display of a failure part or an alarm on a display section (not shown).

[0009] In the unlikely event that a malfunction occurs in the light receiving optical fiber 2 or the electronic circuit in the accident monitoring device 1,
Even if a flash of light occurs, it is not detected, making it impossible to locate the section where the failure has occurred. As a result, grid switching and restoration may take a long time, leading to serious social problems. For this reason, it is important that the entire failure point locating device is always normal, and a diagnostic method is strongly desired.

At present, there is a method in which a diagnostic signal generator 16 that outputs an electrical signal for diagnosis is provided inside the accident monitoring device 1, and a supervisor sends out a diagnostic signal during a patrol inspection to check only the electrical circuit portion. , a method in which the optical fiber terminal section 31, which is the tip of the flashlight detection section 3 of the light-receiving optical fiber 2, is removed, diagnostic light equivalent to flashlight is input, and it is periodically inspected to see if it is operating normally. has been adopted. For this inspection, a configuration is adopted in which even if the optical fiber terminal section 31 is removed, the light guide glass 32 maintains the airtightness of the flashlight detection section 3. However, this method, especially since the inspection interval for removing the optical fiber terminal section 31 is on a yearly basis, is sufficient as a diagnostic method for detecting the occurrence of flash light inside a sealed container where the time of failure cannot be predicted. I can't say that.

[0011]

[Problem to be Solved by the Invention] As mentioned above, by periodically inspecting it, it is confirmed that the failure point locating device including the flash light detection section 3 and the light receiving optical fiber 2 is operating normally. However, if flash flash cannot be detected for some reason during the inspection interval, a problem arises in that when flash flash occurs in a sealed container, it becomes impossible to locate the failure point. On the other hand, shortening the above-mentioned inspection interval and increasing the frequency increases the cost required for inspection, and the work of removing and attaching the flash detector 3 for inspection may damage the light-receiving optical fiber 2 and other parts. There is also the problem that the possibility of failure increases and reliability deteriorates. Another problem is that even if the inspection interval is shortened to about one year, the probability of undetectability as described above will only decrease, but it will not reach the level where it can be considered as virtually non-existent.

An object of the present invention is to solve such problems and to provide a failure point locating device for gas insulated equipment that can be inspected virtually all the time.

[0013]

[Means for Solving the Problems] In order to solve the above-mentioned problems, according to the present invention, a device is provided in a sealed container of gas insulated equipment and guides flashlight generated within the container to the outside through a light guide glass. A flashlight detection unit, a light-receiving optical fiber that guides the flashlight emitted from the flashlight detection unit to the failure point locating device, and a light-receiving optical fiber that receives the light guided and converts it into an electrical signal to detect the failure point. In a failure point locating device for gas insulated equipment consisting of an accident monitoring device for locating a point, an optical cable is constituted by the light receiving optical fiber and a diagnostic light transmitting optical fiber provided in parallel with the light receiving optical fiber, The accident monitoring device includes a diagnostic light emitting unit that generates a transmitted diagnostic light and enters the diagnostic light transmitting optical fiber, and a diagnostic signal comparator that detects the presence or absence of the received diagnostic light that has been converted into an electrical signal. and a fluorescent substance that emits fluorescence as the received diagnostic light when the transmitted diagnostic light is irradiated on the tip of the optical cable on the side of the flash detection unit, and further, the fluorescent substance is connected to the light receiving optical fiber. A fluorescent substance shall be provided at each end of the optical fiber for transmitting diagnostic light, and a fluorescent material shall be provided on the surface of the light guide glass facing the end of the optical cable. The recessed hole provided in the surface of the light guiding glass shall be filled with a fluorescent material, and the surface of the light guiding glass facing the optical cable shall be coated with a fluorescent material, and the optical cable shall be provided with a diagnostic light. A light-receiving optical fiber is provided, and a reflecting part is provided at the tip of the optical cable on the side of the flash light detection section to make the transmitted diagnostic light emitted from the diagnostic light-transmitting optical fiber enter the diagnostic light-receiving optical fiber to become received diagnostic light. Furthermore, the reflecting section shall consist of a prism provided at the tip of the optical cable, and a concave portion shall be provided on the surface of the light guide glass facing the tip of the optical cable, and the concave surface shall be used as a reflective surface to reflect light. and a flashlight detection section that is installed in a sealed container of gas-insulated equipment and guides the flashlight generated in the container to the outside through a light guide glass, and this flashlight detection section. A gas-insulated device consisting of a light-receiving optical fiber that guides the flashing light emitted from the device to a failure point locating device, and an accident monitoring device that receives the light guided by this light-receiving optical fiber and converts it into an electrical signal to locate the failure point. In the failure point locating device, a fluorescent material is provided at the end of the light-receiving optical fiber on the side of the flash light detection section, and the fluorescent material is irradiated with transmitted diagnostic light from outside the flash light detection section. The fluorescent substance is irradiated from the light guide hole and emits fluorescence as a received diagnostic light by the transmitted diagnostic light, and this received diagnostic light connects the received optical fiber. A diagnostic signal comparator is provided for transmitting the signal to the accident monitoring device, converting it into an electrical signal, and comparing the intensity with a predetermined intensity.

[0014]

[Operation] In the configuration of the present invention, an optical fiber for receiving light and an optical fiber for transmitting diagnostic light are provided in parallel with the optical fiber for receiving light, and these constitute an optical cable, and the diagnostic light is generated and transmitted to the accident monitoring device. A diagnostic light emitting part that enters the diagnostic light transmitting optical fiber as the diagnostic light and a diagnostic signal comparator that detects the presence or absence of the received diagnostic light are provided, and a fluorescent light is attached to the tip of the optical cable on the flash light detection part side. By providing a substance,
The transmitted diagnostic light causes the fluorescent material at the tip of the diagnostic light transmitting optical fiber to emit fluorescence, and this fluorescence becomes received diagnostic light that travels through the received diagnostic light optical fiber and returns to the accident monitoring device, where it is received and received by the light receiving unit. The diagnostic light is converted into an electrical signal, and when the intensity exceeds a predetermined intensity by a diagnostic signal comparator, the received diagnostic light is received, and therefore it can be determined that the failure point locating device is normal. Furthermore, by providing a fluorescent material at the tips of both the light receiving optical fiber and the diagnostic light transmitting optical fiber, the fluorescent material provided at the tip of the diagnostic light transmitting optical fiber is emitted by the transmitted diagnostic light. Furthermore, this fluorescence causes a fluorescent material provided at the tip of the diagnostic light receiving optical fiber to emit fluorescence, and this fluorescence becomes received diagnostic light which is transmitted through the diagnostic light receiving optical fiber to the accident monitoring device and received. Alternatively, by providing a fluorescent substance on the surface of the light guide glass facing the end of the optical cable, the fluorescent substance emits fluorescence due to the transmitted diagnostic light incident from the optical fiber for transmitting the diagnostic light, but this fluorescence is emitted in all directions. A portion of the light is transmitted through the diagnostic light receiving optical fiber and received by the accident monitoring device. In addition, by filling the recessed hole in the light guide glass facing the end of the optical cable with the fluorescent material, it is easier to provide the fluorescent material, and it is easier to provide the fluorescent material than in the case where the fluorescent material is provided at the tip of the optical cable. Since the step of generating fluorescence by fluorescence is not necessary, a relatively large amount of received diagnostic light can be obtained. Further, by applying a fluorescent substance to the surface of the light guide glass facing the optical cable, it becomes unnecessary to provide a recessed hole in the light guide glass. Alternatively, an optical fiber for receiving diagnostic light is provided in the optical cable, and a reflecting portion is provided at the tip of the optical cable on the side of the flash light detection unit to input the diagnostic light emitted from the optical fiber for transmitting diagnostic light into the optical fiber for receiving diagnostic light. As a result, a larger amount of received diagnostic light can be obtained compared to a method in which the received diagnostic light is generated using a fluorescent substance. Further, the reflecting section can be configured with a prism provided at the tip of the optical cable. Alternatively, instead of a prism, a recess is provided on the surface of the light guide glass facing the tip of the optical cable, and the concave surface is used as a reflective surface to form a reflective section, thereby eliminating the need for complicated processing of the tip of the optical cable to attach the prism. become. Alternatively, a fluorescent substance is provided at the end of the optical fiber for receiving light on the side of the flashlight detection unit, and a light guide hole is provided in this fluorescent substance to irradiate diagnostic light from outside the flashlight detection unit to the fluorescent substance, and accident monitoring is performed. In the device, a fluorescent material is emitted by the diagnostic light irradiated from the light guiding hole, and the fluorescence that reaches the accident monitoring device through the light-receiving optical fiber is converted into an electrical signal.The intensity of the electrical signal is compared with a predetermined intensity. By providing a diagnostic signal comparator, an optical fiber for transmitting diagnostic light becomes unnecessary.

[0015]

EXAMPLES The present invention will be explained below based on examples. FIG. 1 is a circuit diagram and a cross-sectional view of a failure point locating device showing a first embodiment of the present invention. The same components as in FIG. The detailed explanation will be omitted by adding the subscript A. In this figure, an optical cable 2A consists of two optical fibers commonly coated with a coating 21A, one of which is a light-receiving optical fiber 22A having the same function as the light-receiving optical fiber 2 of FIG. This is an optical fiber 23 for transmitting diagnostic light that transmits diagnostic light when diagnosing the failure point locating device.

At the end of the optical cable 2A on the side of the flash detection section 3A, a fluorescent substance 35 having the same cross section is attached to each of the two optical fibers 22A and 23. In addition, the accident monitoring device 1
The end of the A-side optical fiber 22A for receiving light is connected to the diagnostic light emitting unit provided in the accident monitoring device 1A, and the end of the diagnostic light transmitting optical fiber 23 is connected to the diagnostic light emitting unit so that the light receiving unit 11 can receive the light as in FIG. 10. They are respectively attached so that the transmitted diagnostic light is incident from the section 18. The diagnostic light emitting unit 18 is a diagnostic signal generating unit 181
and a light emitter 182 that emits light in response to a signal from it. Further, a diagnostic signal comparator 17 is provided in parallel with the comparator 13 and waveform shaper 14.

In such a configuration, diagnosis of the failure point locating device is performed as follows. First, the diagnostic light emitting section 1
The light emitted at step 8 is transmitted as diagnostic light through the diagnostic light transmitting optical fiber 23 and irradiated onto the fluorescent substance 35, which is excited and emits fluorescence. Since this fluorescence is emitted in all directions, it is irradiated onto the fluorescent material 35 at the tip of the adjacent light-receiving optical fiber 22A and excites it to emit fluorescence. A part of this fluorescence is transmitted through the light-receiving optical fiber 22A as received diagnostic light, is received by the light-receiving section 11, and is converted into an electrical signal. This electrical signal is amplified by an amplifier 12 as a diagnostic signal and input to two comparators 13 and 17.

The set voltage V1 of the comparator 13 is set to a value suitable for detecting flashlight of relatively high intensity, whereas the diagnostic signal comparator 17 is Since it detects the presence or absence of emitted weak fluorescence, the set voltage V2 is the set voltage V of the comparator 13.
It is set to a voltage value smaller than 1. therefore,
A weak diagnostic signal that cannot be detected by the comparator 13 can be detected by the diagnostic signal comparator 17. The detected diagnostic signal is input to the signal output section 15 and displayed on a display section (not shown), and a diagnostician determines whether or not it is normal.

When flash light is detected, it is detected not only by the comparator 13 but also by the diagnostic signal comparator 17, so that both of these are displayed on the display section.

FIG. 2 is an enlarged cross-sectional view of a part of the flash detection section 3A of FIG. 1. In this figure, as described above, the transmitted diagnostic light 45 emitted by the diagnostic light emitting unit 18 is irradiated onto the fluorescent substance 35 at the tip of the diagnostic light transmitting optical fiber 23 to emit fluorescence, and the fluorescence is used as the receiving light. The adjacent fluorescent substance 35 provided at the tip of the fiber 221A is irradiated with fluorescence as received diagnostic light 44 to be emitted. The received diagnostic light 44 travels through the light receiving optical fiber 22A and reaches the accident monitoring device 1A, where diagnosis of failure point location is performed as described above.

When the flashlight 41 enters through the light guiding glass 32, it is transmitted as flashlight 42, 43 into the respective optical fibers 22A, 23, but only the flashlight 42 among these is transmitted as flashlight 42, 43. This will actually be detected.

FIG. 3 is a sectional view showing a second embodiment of the present invention, which differs from FIG. 2 in that a fluorescent substance 35B is provided on the surface of the introduction glass 32B facing the optical cable 2B, and the light guide The configuration is such that a recessed hole is provided on the upper surface of the glass 32B, and the recessed hole is filled with a fluorescent material 35B. In this configuration, the transmitted diagnostic light 43 is irradiated onto the fluorescent material 35B to emit fluorescence. This fluorescent light is emitted in all directions, but only the fluorescent light that has entered the receiving optical fiber 22B is the received diagnostic light 4.
4 is transmitted to the accident monitoring device 1A in FIG.

In this embodiment, since the fluorescent material does not emit light in two stages as in the case of FIG.
A feature is that the intensity of the diagnostic simulated light 44 received by 2B is high.

FIG. 4 is a sectional view showing a third embodiment of the present invention, and the difference from FIG. 3 is that a fluorescent material 35C is provided on the entire surface of the light guide glass 32C, and the other points are the same, so the fluorescent material The material 35C and the light guiding glass 32C are illustrated. Since the upper surface of the light guide glass 32C is flat and there is no need to provide a recessed hole, it has the advantage of being easier to manufacture than the light guide glass 32B shown in FIG.

FIG. 5 is a cross-sectional view of the optical cable 2D tip and light guide glass 32 showing a fourth embodiment of the present invention, and FIG. 6 is a view taken along the line A--A, and FIGS. The difference is that the received diagnostic light 44 transmitted by the light receiving optical fiber 22B is not generated by a fluorescent material, but is generated by reflecting the transmitted diagnostic light 45 by a prism 5 as shown. The optical cable 2D includes three optical fibers commonly coated with a coating 21D: an optical fiber for receiving light 22D, an optical fiber for transmitting diagnostic light 23D, and an optical fiber for receiving diagnostic light 2.
4 and a coating 21D covering these, and transmitting diagnostic light 4 transmitted by an optical fiber 23D for transmitting diagnostic light.
5 is totally reflected twice by a prism 5 having a trapezoidal cross section, and its direction is reversed to become a received diagnostic light, which is transmitted to the accident monitoring device 1A through a diagnostic light receiving optical fiber 24. The flashlight 41 passes through the parallel surface of the prism 5 facing the light guide glass 32, becomes flashlight 42, and is transmitted to the light-receiving optical fiber 22.
incident on D.

In this embodiment, since the received diagnostic light 44 is not transmitted to the receiving optical fiber 22D, the receiving optical fiber 22D is not directly diagnosed. However, since the light-receiving optical fiber 22D is sandwiched between the two diagnostic optical fibers 23D and 24, it is unlikely that only the light-receiving optical fiber 22D is broken and the other two are normal. Since this is highly unlikely, if both the diagnostic light transmitting optical fiber 23D and the diagnostic light receiving optical fiber 24 are diagnosed as being normal, it can be determined that the light receiving optical fiber 22D is also normal.

FIG. 7 is a sectional view showing a fifth embodiment of the present invention, and FIG. 8 is a view taken along the line B--B. light glass 32
A hole is dug at point E and a reflective surface 5E is provided. The transmitted diagnostic light 45 is reflected twice by the reflective surface 5E, reverses its direction, and becomes the received diagnostic light 44 and returns to the accident monitoring device 1A. Figure 5
Unlike the above, the reflection is not within the prism but in the air, so the light-receiving side must be manufactured taking into account the low reflectance, or the reflective surface must be fabricated to obtain the same strong reflected light as shown in Figure 5. A configuration may be adopted in which 5E is coated with a reflective film. If the surface coated with a reflective film is only the reflective slope, the flash light reaches the optical cable through the uncoated surface between them and is transmitted as flash light 42 to the accident monitoring device 1A. Even if the reflective surface is not coated, the flashlight 41 that passes through the slope will not be refracted or reflected by this surface to form the flashlight 42, so coating will not cause a large change in the intensity of the flashlight 42. do not have.

In the fourth embodiment shown in FIGS. 5 and 6, three optical fibers 22D, 23D, and 24 are arranged side by side. It is also possible to arrange the prism 5 so that the cross section thereof becomes the apex of a triangle, and the shape of the prism 5 may be set according to the arrangement. In this case, flashlight 4
It is also possible to easily obtain a configuration in which the light beam 1 enters the light-receiving optical fiber 22D without passing through the prism. The arrangement of the three optical fibers can be similarly implemented in the fifth embodiment shown in FIGS. 7 and 8.

FIG. 9 is a circuit diagram and a sectional view of a failure point locating device according to a sixth embodiment of the present invention. This is the point where the diagnostic light is transmitted on the 3rd floor. At the tip of the light-receiving optical fiber 2F on the side of the flashlight detection section 3F, there is a fluorescent material 3 as in FIG.
There is a 5th floor. Transmitted diagnostic light for causing the fluorescent substance 35F to emit light enters through a light guide hole 62 provided in the airtight flange 34F. The coating of this portion is removed to form a coating peeling part 62, and the transmitted diagnostic light introduced from the light guide hole 62 is irradiated onto the fluorescent substance 35F. The irradiated fluorescent substance 35F emits fluorescence, a part of which is transmitted through the optical cable 2F and received by the light receiving section 11 of the accident monitoring device 1F. The transmitted diagnostic light can be generated by appropriately guiding sunlight, illumination light, etc. to the light guide hole 62.

The difference between the accident monitoring device 1F and the accident monitoring device 1A shown in FIG. 1 is that the diagnostic light emitting section 18 is not provided. The processing of the diagnostic light received by the light receiving unit 11 is shown in Figure 1.
It is similar to

In this embodiment, the structure of the optical fiber is simpler than that in the embodiment shown in FIG. Since commercially available optical fibers can be used, the failure point locating device is easy to implement and inexpensive.

[0032]

[Effects of the Invention] As described above, the present invention provides an optical fiber for transmitting diagnostic light in parallel with an optical fiber for receiving light, constitutes an optical cable, and generates diagnostic light for the accident monitoring device. By providing a diagnostic light emitting part that enters the diagnostic light transmitting optical fiber and a diagnostic signal comparator that detects the presence or absence of the received diagnostic light, and by providing a fluorescent substance at the tip of the optical cable on the flash light detection part side, the transmission can be improved. The optical diagnostic light causes the fluorescent substance at the tip of the optical fiber for transmitting the diagnostic light to emit fluorescence, and this fluorescence becomes received diagnostic light that travels through the optical fiber for the received diagnostic light and returns to the accident monitoring device. converted into a signal. When the intensity of this electrical signal exceeds a predetermined intensity by the diagnostic signal comparator, the received diagnostic light is received and it can therefore be determined that the failure point locating device is normal. Diagnosis is possible each time the diagnostic light emitting section generates the transmitted diagnostic light, so by generating the transmitted diagnostic light at appropriate intervals, it is possible to virtually continuously locate the fault point. As a result, it is possible to confirm that the failure point locating device is in a normal condition, and if an abnormality is discovered, the failure point locating device can be repaired immediately to maintain the normal condition virtually all the time. A great effect can be obtained. Furthermore, if a fluorescent substance is provided at the tips of both the optical fiber for receiving light and the optical fiber for transmitting diagnostic light, the fluorescent substance at the tip of the optical fiber for transmitting diagnostic light will emit fluorescence due to the transmitted diagnostic light. As a result, the fluorescent substance at the tip of the diagnostic light receiving optical fiber emits fluorescence as the received diagnostic light, so that the received diagnostic light can be reliably obtained. Alternatively, by providing a fluorescent material on the surface of the light guide glass facing the end of the optical cable, it is not necessary to process the tip of the optical fiber, and the step of emitting fluorescence is also unnecessary. It is possible to obtain diagnostic light with a large target. Alternatively, by filling a recessed hole in the surface of the light guide glass facing the end of the optical cable with a fluorescent substance,
A fluorescent material can be easily provided. Further, by applying a fluorescent material to the surface of the light guide glass facing the optical cable, it becomes unnecessary to provide a recessed hole in the light guide glass. In addition, an optical fiber for receiving diagnostic light is installed in the optical cable.
A method of generating received diagnostic light using a fluorescent material by providing a reflecting section at the tip of the optical cable on the side of the flash detection section that makes the diagnostic light emitted from the diagnostic light transmitting optical fiber enter the diagnostic light receiving optical fiber. It is possible to obtain a higher intensity of the received diagnostic light compared to the conventional method. Furthermore, by forming the reflecting section with a prism provided at the tip of the optical cable, the reflecting section can be easily formed. In addition, instead of a prism, a recess is provided on the surface of the light guide glass facing the tip of the optical cable, and by using this recessed surface as a reflective surface to form the reflective section, there is no need for complicated processing of the tip of the optical cable to attach the prism. become. In addition, the optical cable is made of only one optical fiber for light reception, which is the same as before, and a fluorescent substance is provided at the end on the side of the flashlight detection unit, and the diagnostic light from outside the flashlight detection unit is transferred to the fluorescent substance. By providing a light guiding hole for irradiation and installing a diagnostic signal comparator in the accident monitoring device that converts the received fluorescence into an electrical signal and compares the intensity of the electrical signal with a predetermined intensity, the optical cable can be used in the same way as before. Since only one optical fiber is required, in addition to the above-mentioned effect that the fault point location can always be maintained in a normal state, it is also possible to obtain the effect that the fault point locating device is simple in structure and, as a result, becomes an inexpensive fault point location device.

[Brief explanation of the drawing]

[Fig. 1] A circuit diagram and a sectional view of a failure point locating device showing a first embodiment of the present invention.

[Figure 2] Enlarged cross-sectional view of a part of Figure 1

FIG. 3 is a sectional view showing a second embodiment of the invention.

[Fig. 4] A cross-sectional view showing a third embodiment of the present invention.

FIG. 5 is a sectional view showing a fourth embodiment of the invention.

[Fig. 6] A-A arrow view in Fig. 5

FIG. 7 is a sectional view showing a fifth embodiment of the present invention.

[Figure 8]
BB arrow view in Figure 7

[Fig. 9] A circuit diagram and a sectional view of a failure point locating device showing a sixth embodiment of the present invention.

[Figure 10] Circuit diagram and cross-sectional diagram showing a conventional failure point locating device for gas insulated equipment

[Explanation of symbols]

1 Accident monitoring device 1A Accident monitoring device 1F Accident monitoring device 11 Light receiving part 12 Amplifier 13 Comparator 14 Waveform shaper 15 Output section 17 Diagnostic signal comparator 18 Diagnostic light emitting part 2 Optical fiber for light reception 21 Coating 22 Optical fiber 2A optical cable 21A Coating 22A Optical fiber for light reception 23 Optical fiber for receiving diagnostic light 2B Optical cable 22B Optical fiber for light reception 23B Optical fiber for receiving diagnostic light 2D optical cable 21D Coating 22D Optical fiber for light reception 23D Optical fiber for receiving diagnostic light 24 Optical fiber for transmitting diagnostic light 2F Optical cable 3 Flash light detection section 3A Flash light detection section 3F Flash light detection section 31 Optical fiber terminal section 32 Light guide glass 32B Light guide glass 32C light guide glass 32E Light guide glass 34 Airtight flange 34F Airtight flange 35 Fluorescent material 35B Fluorescent material 35C fluorescent substance 35F Fluorescent material 41 Flashlight 42 Flashlight 43 Flashlight 44 Received diagnostic light 45 Transmitting diagnostic light 5 Prism (reflection part) 5E Reflective surface (reflective part) 100 Sealed container

Claims (9)

[Claims] 1. A flashlight detection unit installed in a sealed container of gas-insulated equipment to guide flashlight generated within the container to the outside via a light guide glass; a flashlight detection unit that guides flashlight generated within the container to the outside through a light guide glass; In a failure point locating device for gas insulated equipment, which comprises a light-receiving optical fiber that guides the light to the failure point locating device, and an accident monitoring device that receives the light guided by the light-receiving optical fiber and converts it into an electrical signal to locate the failure point. , an optical cable is constituted by the light-receiving optical fiber and a diagnostic light-transmitting optical fiber provided in parallel with the light-receiving optical fiber, and the diagnostic light is generated and transmitted to the accident monitoring device. A diagnostic light emitter that enters the optical fiber and a diagnostic signal comparator that detects the presence or absence of the received diagnostic light converted into an electrical signal are provided, and the transmitted diagnostic light is provided at the tip of the optical cable on the side of the flash detection section. 1. A failure point locating device for gas insulated equipment, characterized in that it is provided with a fluorescent material that emits fluorescence as received diagnostic light when irradiated with it. 2. The failure point locating device for gas insulated equipment according to claim 1, wherein a fluorescent substance is provided at the tips of the light receiving optical fiber and the diagnostic light transmitting optical fiber. 3. Claim 1, wherein the fluorescent substance is provided on the surface of the light guide glass facing the end of the optical cable.
Fault point locating device for the gas insulated equipment described. 4. The failure point locating device for gas insulated equipment according to claim 3, wherein a concave hole provided in the surface of the light guide glass facing the end of the optical cable is filled with a fluorescent material. 5. The failure point locating device for gas insulated equipment according to claim 3, wherein a fluorescent material is coated on the surface of the light guiding glass facing the optical cable. 6. A flashlight detection unit installed in a sealed container of gas-insulated equipment to guide flashlight generated within the container to the outside via a light guide glass; In a failure point locating device for gas insulated equipment, which comprises a light-receiving optical fiber that guides the light to the failure point locating device, and an accident monitoring device that receives the light guided by the light-receiving optical fiber and converts it into an electrical signal to locate the failure point. , an optical cable is constituted by three optical fibers: the optical fiber for receiving light, an optical fiber for transmitting diagnostic light, and an optical fiber for receiving diagnostic light, which are provided in parallel with the optical fiber for receiving light, and in the accident monitoring device, A diagnostic light emitting unit that generates a transmitted diagnostic light and enters the diagnostic light transmitting optical fiber, and a diagnostic signal comparator that detects the presence or absence of the received diagnostic light that has been converted into an electrical signal, A reflecting part is provided at the tip on the side of the flash detection part to make the transmitted diagnostic light emitted from the diagnostic light transmitting optical fiber enter the diagnostic light receiving optical fiber and convert it into received diagnostic light. Fault point locating device for gas insulated equipment. 7. The failure point locating device for gas insulated equipment according to claim 6, wherein the reflecting section is comprised of a prism provided at the tip of the optical cable. 8. A failure point of the gas insulated equipment according to claim 6, characterized in that a recess is provided on the surface of the light guiding glass facing the tip of the optical cable, and the recessed surface is used as a reflecting surface to constitute a reflecting section. Locating equipment. 9. A flashlight detection section provided in a sealed container of gas insulated equipment to guide flashlight generated within the container to the outside via a light guiding glass; In a failure point locating device for gas insulated equipment, which comprises a light-receiving optical fiber that guides the light to the failure point locating device, and an accident monitoring device that receives the light guided by the light-receiving optical fiber and converts it into an electrical signal to locate the failure point. , a fluorescent material is provided at the end of the light-receiving optical fiber on the side of the flash detection section, and a light guide hole is provided in the fluorescent material for irradiating the transmitted diagnostic light onto the fluorescent material from outside the flash detection section. The fluorescent material is irradiated from the light guide hole and emits fluorescence as a received diagnostic light by the transmitted diagnostic light, and the received diagnostic light is transmitted through the light receiving optical fiber and sent to the accident monitoring device. 1. A failure point locating device for gas insulated equipment, characterized in that it is provided with a diagnostic signal comparator for converting the detected signal into an electrical signal and comparing the intensity with a predetermined intensity.