JP2979678B2 - Fault locator for gas insulation equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas-insulated switchgear device referred to as GIS, a gas-insulated cable referred to as GIC, and the like, which are separated by insulating spacers to form a plurality of sealed sections. The present invention relates to a failure point locating device that detects internal flash light in each section of a gas insulated device and locates a section where a flash failure has occurred.

[0002]

2. Description of the Related Art Gas insulated devices such as GIS and GIC are important devices for power transmission, and if a failure such as a ground fault or a short-circuit between phases occurs inside these gas insulated devices, the failure must be quickly resolved. It is required to be restored. For this purpose, these devices are completely sealed, and as described above, the inside is also divided by insulating spacers to form a plurality of sections. Therefore, when a failure occurs, it is desirable to accurately locate the sections. As a fault point locating device for this purpose, a device which optically detects flash light generated at the time of a ground fault or the like inside a gas insulated device has been put to practical use.

In general, the probability of occurrence of the above-described failure is extremely small. Therefore, when the failure point locator operates, a function for constantly diagnosing that the failure point locator is sound is provided in order to ensure its reliability. is important.

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

The accident monitoring device 1 includes a light receiving unit 11 such as a photodiode for receiving light guided by the light receiving optical fiber 2 and converting the light into an electric signal, an amplifier 12 for amplifying an output signal of the photodiode, and the like.
A comparator 13 that outputs a signal only when the intensity of the signal exceeds a predetermined voltage value V ₁ , a waveform shaper 14 that shapes the waveform of the output, a signal output unit 15 that outputs the result, and an input of the amplifier 12. And a diagnostic signal generator 16 provided on the side.

The light receiving optical fiber 2 comprises an optical fiber 21 and a coating 22 for preventing light from entering the fiber from outside, one end of which is a light receiving section 11 and the other end is a flash light detecting section 3.
Has been inserted.

The flash light detecting section 3 is a portion for extracting 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 which is mounted on the sealed container 100 by welding. 33, the light guide glass 3 fitted in the central through hole of the mounting flange 33
2. An airtight flange attached to the mounting flange 33 with bolts 37, an optical fiber end 31 to which the end of the optical fiber 2 for light receiving attached to the mounting flange 33 with bolts 36, and packings 38 and 39 for maintaining airtightness. ing.

When flash light is generated in the sealed container 100, the flash light is reflected directly or on the inner wall of the sealed container 100, and enters the light receiving optical fiber 2 through the light guide glass 32. The flash light travels through the light receiving optical fiber 2 and is received by the light receiving unit 11 of the accident monitoring device 1 and is converted into an electric signal having an intensity proportional to the intensity of the light. The electric signal is amplified by the amplifier 12 to such an intensity that it can be easily processed, and is high when the flashlight is detected by the waveform shaper 14 via the comparator 13 that detects only the flashlight, and is low when the flashlight is not detected. The signal is output from the signal output unit 15 and a display unit (not shown) outputs a location result as a display of a faulty part or an alarm.

If a failure occurs in the optical fiber 2 for receiving light or the electronic circuit in the accident monitoring device 1 when a failure occurs,
Even if flash light is generated, it is not detected, so that it is impossible to locate the faulty section. As a result, it takes a long time for system switching and restoration, and there is a possibility that the problem may develop into a serious social problem. For this reason, it is important that the entire failure point locating device is always normal, and a diagnosis method therefor is strongly required.

At present, a diagnostic signal generator 16 for outputting an electrical signal for diagnosis is provided inside the accident monitoring apparatus 1, and a patrol member transmits a diagnostic signal during a patrol inspection to confirm only an electrical circuit portion. A method of removing the optical fiber terminal portion 31 which is the tip of the flash light detecting section 3 of the optical fiber 2 for light reception, and entering diagnostic light equivalent to flash light to periodically check whether or not the optical fiber operates normally. Has been adopted. For this inspection, a configuration is adopted in which the airtightness of the flashlight detection unit 3 is maintained by the light guide glass 32 even when the optical fiber terminal unit 31 is removed. However, since this method, particularly the inspection interval for removing the optical fiber terminal section 31, is on a yearly basis, it is sufficient as a diagnostic method for detecting the occurrence of flashing light inside a sealed container in which the time of failure cannot be predicted. Not really.

[0011]

As described above, it is confirmed that the fault locator including the flash light detector 3 and the light receiving optical fiber 2 operates normally by performing periodic inspection. However, if flash light cannot be detected for some reason during the inspection interval, a problem arises in that a flash point cannot be located when a flash occurs in the sealed container. On the other hand, if the above-mentioned inspection interval is shortened and the frequency is increased, the cost required for the inspection increases, and the light receiving optical fiber 2 and other parts are damaged by the work of removing and installing the flash light detection unit 3 for the inspection. There is also a problem that the possibility of the operation is increased and the reliability is rather lowered. Further, even if the inspection interval is shortened to about one year, there is a problem that the probability of non-detection as described above is reduced, but it is hardly considered that there is substantially no detection.

An object of the present invention is to solve such a problem and to provide an apparatus for locating a fault of a gas insulated apparatus which can be inspected substantially constantly.

[0013]

According to the present invention, in order to solve the above-mentioned problems, flash light generated in a hermetically sealed container of a gas-insulated device is guided outside through a light guide glass. A flash light detector, a light receiving optical fiber that guides flash light emitted from the flash light detector to a failure point locating device, receives light guided by the light receiving optical fiber, converts the light into an electric signal, and breaks down. In a failure point locating device for a gas insulated device comprising 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 light transmission diagnostic light to be incident on the diagnostic light transmitting optical fiber and a diagnostic signal comparator that detects the presence or absence of the received light diagnostic light converted into an electric signal. Flash light detection of the optical cable A fluorescent substance which emits fluorescence as light reception diagnostic light when the light transmission diagnostic light is applied to the distal end of the unit side is provided, and the fluorescent substance is further divided into a light receiving optical fiber and a diagnostic optical transmission optical fiber. The fluorescent substance is provided on the surface of the light guide glass facing the end of the optical cable, and the fluorescent substance is provided on the surface of the light guide glass facing the end of the optical cable. The concave hole shall be filled with a fluorescent substance, the fluorescent substance shall be applied to the surface of the light guide glass facing the optical cable, and the optical cable shall be provided with an optical fiber for receiving diagnostic light, At the tip on the side of the flash light detection unit, a reflection unit is provided, which receives the transmitted light diagnostic light emitted from the diagnostic light transmitting optical fiber into the diagnostic light receiving optical fiber and serves as the received light diagnostic light, and further, The reflective part is an optical cable And a reflector provided on the surface of the light guide glass opposed to the tip of the optical cable, and the concave portion is used as a reflection surface to constitute a reflection portion. A flashlight detector that guides flashlight generated in the container to the outside through the light guide glass, and a light guide that guides flashlight emitted from the flashlight detector to the failure point locating device In the fault locating device for a gas insulated device comprising an optical fiber for use and an accident monitoring device for receiving the light guided by the light receiving optical fiber, converting the light into an electric signal and locating the fault, the flash of the light receiving optical fiber is used. A fluorescent substance is provided at an end on the side of the light detection unit, and light guide holes are provided for irradiating the fluorescent substance with light-transmitting diagnostic light from outside of the flash light detection unit.
In the accident monitoring device, the fluorescent substance is emitted from the light guide hole, emits fluorescence as light receiving diagnostic light by the light transmitting diagnostic light, and the light receiving diagnostic light travels through the light receiving optical fiber and reaches the accident monitoring device. It is assumed that a diagnostic signal comparator is provided which is converted into an electric signal and compares the intensity with a predetermined intensity.

[0014]

In the construction of the present invention, a light receiving optical fiber and an optical fiber for transmitting a diagnostic light are provided in parallel with the light receiving optical fiber to constitute an optical cable, and a diagnostic light is generated in an accident monitoring device. A diagnostic light emitting unit which enters the optical fiber for transmitting diagnostic light as diagnostic light, and a comparator for diagnostic signal which detects the presence / absence of received diagnostic light. By providing the substance, the fluorescent substance at the tip of the optical fiber for transmitting diagnostic light emits fluorescent light by the diagnostic light for transmitting light, and this fluorescent light becomes the diagnostic light for light reception and propagates through the optical fiber for diagnostic light to be transmitted to the accident monitoring device. The returned light is received and converted into an electric signal by the light receiving unit, and when the intensity exceeds a predetermined intensity by the diagnostic signal comparator, the received light diagnostic light is received, and thus it is determined that the fault locating device is normal. It can be. Furthermore, by providing a fluorescent substance at both ends of the optical fiber for receiving light and the optical fiber for transmitting diagnostic light, the fluorescent substance provided at the distal end of the optical fiber for transmitting diagnostic light emits fluorescence by the transmitted diagnostic light. The fluorescent material provided at the tip of the optical fiber for receiving diagnostic light emits fluorescent light, and the fluorescent light becomes diagnostic light for reception and is transmitted to the accident monitoring device by the optical fiber for diagnostic light reception 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 by the transmitted diagnostic light incident from the diagnostic light transmitting optical fiber. Part of the light is transmitted through the diagnostic light receiving optical fiber and is received by the accident monitoring device. In addition, by filling the fluorescent material into the concave hole provided on the surface of the light guide glass opposed to the end of the optical cable, the fluorescent material can be easily provided and the fluorescent material can be provided at the tip of the optical cable. Since the stage of generation of fluorescence by fluorescence is not required, relatively large 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 is not necessary to provide a concave hole in the light guide glass. Alternatively, an optical fiber for receiving a diagnostic light is provided on the optical cable, and a reflecting portion for inputting the diagnostic light emitted from the optical fiber for transmitting the diagnostic light to the optical fiber for receiving the diagnostic light is provided at the end of the optical cable on the side of the flashlight detecting unit. Thereby, it is possible to obtain a larger received light diagnostic light as compared with the method of generating the received light diagnostic light by the fluorescent substance. Further, the reflecting portion can be constituted by a prism provided at the tip of the optical cable. Alternatively, instead of a prism, a concave portion is provided on the surface of the light guide glass facing the distal end of the optical cable, and the concave portion is used as a reflective surface to constitute a reflecting portion, so that complicated processing of the optical cable distal end for mounting the prism is unnecessary. become. Alternatively, a fluorescent substance is provided at the end of the optical fiber for light reception on the side of the flashlight detection section, and a light guide hole for irradiating the fluorescent substance with diagnostic light from outside the flashlight detection section is provided on the fluorescent substance, thereby monitoring the accident. A fluorescent substance is emitted by the diagnostic light emitted from the light guide hole through the light guide hole, and the fluorescence that reaches the accident monitoring device through the light receiving optical fiber is converted to an electrical signal. By providing the diagnostic signal comparator, the optical fiber for transmitting the diagnostic light becomes unnecessary.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on embodiments.
FIG. 1 is a circuit diagram and a cross-sectional view of a fault locating apparatus showing a first embodiment of the present invention. In FIG. 1, the same components as those in FIG. Therefore, a detailed description is omitted by adding a subscript A.
In this figure, the optical cable 2A is composed 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. 10, and the other is one. An optical fiber 23 for transmitting diagnostic light for transmitting diagnostic light at the time of diagnosing the fault point locating device.

At the end of the optical cable 2A on the side of the flashlight detector 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 is provided with an end of the diagnostic light transmitting optical fiber 23 so that the light receiving optical fiber 22A can be received by the light receiving section 11 as in FIG. The light-transmitting diagnostic light is attached from the unit 18 so as to be incident thereon. The diagnostic light emitting section 18 is a diagnostic signal generating section 181
And a light emitter 182 that emits light in response to a signal from now on. A diagnostic signal comparator 17 is provided in parallel with the comparator 13 and the waveform shaper 14.

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

The set voltage V ₁ of the comparator 13 is set to a value suitable for detecting flash light having a relatively large intensity, while the diagnostic signal comparator 17 is configured to excite the fluorescent substance 35. because it is to detect the presence or absence of weak fluorescence emitted by the set voltage V ₂ is set at a small voltage value than the set voltage V ₁ of the comparator 13. 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 unit 15 and displayed on a display unit (not shown) to determine whether or not the signal 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 them are displayed on the display unit.

FIG. 2 is an enlarged sectional view showing a part of the flashlight detector 3A of FIG. In this figure, the transmitted light diagnostic light 45 emitted from the diagnostic light emitting section 18 as described above is irradiated on the fluorescent substance 35 at the tip of the diagnostic light transmitting optical fiber 23 to emit fluorescent light. The adjacent fluorescent substance 35 provided at the tip of the fiber 221A is irradiated to emit fluorescent light as the received light diagnostic light 44. The light-receiving diagnostic light 44 travels through the light-receiving optical fiber 22A and reaches the accident monitoring device 1A, where the diagnosis of the fault point is performed as described above.

When the flash light 41 enters through the light guide glass 32, the flash light 41 is transmitted as flash light 42, 43 into the respective optical fibers 22A, 23, but only the flash light 42 of the light is transmitted. It will be actually detected.

FIG. 3 is a sectional view showing a second embodiment of the present invention. The difference from FIG. 2 is that the fluorescent substance 35B is provided on the surface of the introduction glass 32B facing the optical cable 2B. In this configuration, a concave hole is provided in the upper surface of the glass 32B in the figure, and the concave hole is filled with the fluorescent substance 35B. In this configuration, the light transmission diagnostic light 43 is irradiated on the fluorescent substance 35B to emit fluorescent light. This fluorescent light is emitted in all directions, but only the fluorescent light that enters the light receiving optical fiber 22B is the light receiving diagnostic light 4.
4 is transmitted to the accident monitoring device 1A of FIG.

In this embodiment, since the light emission of the fluorescent substance is not in two stages as in the case of FIG.
There is a feature that the intensity of the diagnostic simulation light 44 received by 2B is large.

FIG. 4 is a sectional view showing a third embodiment of the present invention. The difference from FIG. 3 is that a fluorescent substance 35C is provided on the entire surface of the light guide glass 32C. An illustration of the material 35C and light guide glass 32C is shown. Since the upper surface of the light guide glass 32C is flat and does not need to be provided with a concave hole, there is a feature that it is easier to manufacture than the light guide glass 32B of FIG.

FIG. 5 is a cross-sectional view of the tip of an optical cable 2D and a light guide glass 32 showing a fourth embodiment of the present invention, and FIG. 6 is a view taken along the line AA in FIGS. 2, 3, and 4. The difference is that the received light diagnostic light 44 transmitted by the light receiving optical fiber 22B is not generated by a fluorescent substance, but is generated by reflecting the transmitted light diagnostic light 45 by the prism 5 as shown in the figure. The optical cable 2D is composed of three optical fibers, which are commonly covered with a coating 21D, a light receiving optical fiber 22D, a diagnostic light transmitting optical fiber 23D, and a diagnostic light receiving optical fiber 2D.
4 and a coating 21D that covers them, and the light transmitting diagnostic light 4 transmitted through the diagnostic light transmitting optical fiber 23D.
Reference numeral 5 denotes a prism 5 having a trapezoidal cross section, which performs total reflection twice and reverses its direction to become a received light diagnostic light, which is transmitted to the accident monitoring device 1A by a diagnostic light receiving optical fiber 24.
The flash light 41 passes through a parallel surface of the prism 5 facing the light guide glass 32 to become flash light 42 and becomes a light receiving optical fiber 22.
It is incident on D.

In this embodiment, since the light receiving diagnostic light 44 is not transmitted to the light receiving optical fiber 22D, the light receiving optical fiber 22D is not directly diagnosed. However, since the light receiving optical fiber 22D is disposed so as to be sandwiched between the two diagnostic optical fibers 23D and 24, only the light receiving optical fiber 22D is disconnected and the other two are normal. Since it is hardly possible, if both the diagnostic light transmitting optical fiber 23D and the diagnostic light receiving optical fiber 24 are diagnosed to be 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 BB of FIG. Light glass 32
A point is that a hole is dug in E and a reflecting surface 5E is provided. The light-sending diagnostic light 45 is reflected twice on the reflecting surface 5E, reverses its direction, becomes the light-receiving diagnostic light 44, and returns to the accident monitoring device 1A. FIG.
Unlike the reflection in the prism, it is reflection in the air and not in the prism, so the light receiving side is manufactured in consideration of the low reflectance, or the reflection surface is used to obtain the reflected light with the same intensity as in FIG. A configuration in which 5E is coated with a reflective film may be employed. If the surface to be coated with the reflective film is only the reflecting slope, the flash light reaches the optical cable through the uncoated surface between them, and is transmitted to the accident monitoring device 1A as flash light 42. Even when the reflection surface is not coated, the flash light 41 passing through the inclined surface does not become a component forming the flash light 42 by being refracted or reflected by this surface, so that the coating causes a large change in the intensity of the flash light 42. Absent.

In the fourth embodiment shown in FIGS. 5 and 6, all three optical fibers 22D, 23D and 24 are arranged side by side. However, the present invention is not limited to such a configuration. Can be arranged such that the cross section of the prism becomes the vertex of the triangle, and the shape of the prism 5 may be set according to the arrangement. In this case, flashlight 4
1 can easily be obtained without passing through the prism and entering the light receiving optical fiber 22D. The arrangement of the three optical fibers can be similarly implemented in the fifth embodiment shown in FIGS.

FIG. 9 is a circuit diagram and a sectional view of a fault point locating apparatus showing a sixth embodiment of the present invention. The difference from FIG. 1 is that no flash fiber detecting optical fiber is provided and a flash light detecting section is provided. The point is that the light transmission diagnostic light is given at 3F. As in FIG. 1, a fluorescent substance 3 is provided at the end of the light receiving optical fiber 2F on the side of the flashlight detector 3F.
5F is provided. Light transmission diagnostic light for causing the fluorescent substance 35F to emit light enters from a light guide hole 62 provided in the airtight flange 34F. The coating on this portion is removed to form a coating peeling portion 62, and the light transmission diagnostic light introduced from the light guide hole 62 is irradiated on the fluorescent substance 35F. The illuminated fluorescent substance 35F emits fluorescence, and a part thereof is transmitted through the optical cable 2F and received by the light receiving section 11 of the accident monitoring device 1F.
The light transmission diagnostic light can be generated by appropriately guiding sunlight, illumination light, or the like to the light guide hole 62.

The accident monitoring device 1F is different from the accident monitoring device 1A shown in FIG. 1 in 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 FIG.
Is the same as

In this embodiment, since the structure of the optical fiber is simpler than that of the embodiment of FIG. 1, the structure is the same as the conventional technology using one optical fiber except for the tip on the side of the flash light detector. Since a commercially available optical fiber can be used, the realization is easy and an inexpensive fault locator can be provided.

[0032]

As described above, according to the present invention, an optical cable is provided by providing an optical fiber for transmitting diagnostic light in parallel with an optical fiber for receiving light, and an optical cable is constructed by these. A diagnostic light emitting section incident on the optical fiber for transmitting the diagnostic light and a diagnostic signal comparator for detecting the presence or absence of the received diagnostic light are provided, and a fluorescent substance is provided at the end of the optical cable on the side of the flash light detecting section. The fluorescent substance at the tip of the optical fiber for transmitting diagnostic light emits fluorescence due to the optical diagnostic light, and the fluorescent light becomes diagnostic light for light reception, travels through the optical fiber for diagnostic light reception, is returned to the accident monitoring device, and is received by the light receiving unit. Converted to a signal. When the intensity of the electric signal exceeds a predetermined intensity by the diagnostic signal comparator, the received diagnostic light is received, so that it can be determined that the fault locating device is normal. Diagnosis can be performed each time the diagnostic light emitting unit generates the diagnostic light, so that the generation of the diagnostic light at appropriate intervals can provide substantially continuous fault location. As a result, the normal state of the fault locating device can be confirmed, and if an abnormality is found, the fault locating device can be repaired immediately so that the normal state can be substantially always maintained. The effect is finally obtained. Further, when a fluorescent substance is provided at both ends of the optical fiber for receiving light and the optical fiber for transmitting diagnostic light, respectively, the fluorescent substance at the distal end of the optical fiber for transmitting diagnostic light emits fluorescence by the transmitted diagnostic light. As a result, the fluorescent substance at the tip of the optical fiber for receiving diagnostic light emits fluorescent light as diagnostic light for received light, so that diagnostic light for received light can be obtained reliably. Alternatively, by providing a fluorescent substance on the surface of the light guide glass facing the end of the optical cable, processing of the tip of the optical fiber becomes unnecessary, and the step of emitting fluorescent light becomes unnecessary. It is possible to obtain an extremely large received light diagnostic light. Alternatively, the fluorescent substance can be easily provided by filling the concave hole provided on the surface of the light guide glass facing the end of the optical cable with the fluorescent substance. Further, by applying a fluorescent substance to the surface of the light guide glass facing the optical cable, it is not necessary to provide a concave hole in the light guide glass. Also, an optical fiber for receiving the diagnostic light is provided on the optical cable, and a reflecting portion for inputting the diagnostic light emitted from the optical fiber for transmitting the diagnostic light to the optical fiber for receiving the diagnostic light is provided at the end of the optical cable on the side of the flashlight detecting unit. This makes it possible to obtain a higher intensity of the received diagnostic light as compared with the method of generating the received diagnostic light using the fluorescent substance. Furthermore, the reflection part,
By using a prism provided at the end of the optical cable, the reflecting portion can be easily formed. Also, instead of the prism, a concave portion is provided on the surface of the light guide glass facing the distal end of the optical cable, and the concave portion is used as a reflective surface to constitute a reflecting portion, so that complicated processing of the optical cable distal end for mounting the prism is unnecessary. become. Also, the optical cable is made of only one optical fiber for receiving light, which is the same as the conventional one, and a fluorescent substance is provided at the end on the side of the flashlight detection section, and diagnostic light is applied to the fluorescent substance from outside the flashlight detection section. By providing a light guide hole for irradiation and a diagnostic signal comparator that compares the intensity of the electric signal obtained by converting the received fluorescent light into an electric signal with a predetermined intensity in the accident monitoring device, the optical cable is the same as the conventional one. Since only one optical fiber is required, in addition to the effect that the above-mentioned fault location can be always maintained in a normal state, an effect that a simple configuration and as a result an inexpensive failure location apparatus can be obtained.

[Brief description of the drawings]

FIG. 1 is a circuit diagram and a cross-sectional view of a fault point locating device showing a first embodiment of the present invention.

FIG. 2 is an enlarged sectional view showing a part of FIG. 1 in an enlarged manner;

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

FIG. 4 is a sectional view showing a third embodiment of the present invention.

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

FIG. 6 is a view taken in the direction of arrows AA in FIG. 5;

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

8 is a view taken in the direction of arrows BB in FIG. 7;

FIG. 9 is a circuit diagram and a cross-sectional view of a fault locating device showing a sixth embodiment of the present invention.

FIG. 10 is a circuit diagram and a cross-sectional view showing a conventional fault locating device for gas-insulated equipment.

[Explanation of symbols]

 Reference Signs List 1 accident monitoring device 1A accident monitoring device 1F accident monitoring device 11 light receiving section 12 amplifier 13 comparator 14 waveform shaper 15 output section 17 diagnostic signal comparator 18 diagnostic light emitting section 2 light receiving optical fiber 21 coating 22 optical fiber 2A optical cable 21A Coating 22A Receiving optical fiber 23 Receiving diagnostic optical fiber 2B Optical cable 22B Receiving optical fiber 23B Receiving diagnostic optical fiber 2D Optical cable 21D Coating 22D Receiving optical fiber 23D Diagnostic light receiving optical fiber 24 Diagnostic light transmitting Optical fiber 2F Optical cable 3 Flash light detection unit 3A Flash light detection unit 3F Flash light detection unit 31 Optical fiber terminal unit 32 Light guide glass 32B Light guide glass 32C Light guide glass 32E Light guide glass 34 Hermetic flange 34F Hermetic flange 35 Fluorescent substance 35B Fluorescent substance 3 Reference Signs List 5C Fluorescent material 35F Fluorescent material 41 Flash light 42 Flash light 43 Flash light 44 Reception diagnostic light 45 Light transmission diagnostic light 5 Prism (reflection part) 5E Reflection surface (reflection part) 100 Sealed container

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields investigated (Int. Cl. ⁶ , DB name) G01R 31/08 H02B 13/065 H02H 5/00

Claims (9)

(57) [Claims] 1. A flash light detecting section provided in a sealed container of a gas insulating device for guiding flash light generated in the container to the outside through a light guide glass, and flash light emitted from the flash light detecting section. A fault detection system for gas-insulated equipment consisting of 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 fault point An optical cable is configured by the light receiving optical fiber and the diagnostic light transmitting optical fiber provided in parallel with the light receiving optical fiber, and the accident monitoring device generates light transmitting diagnostic light to transmit the diagnostic light transmitting light. A diagnostic light emitting section incident on the optical fiber for use and a diagnostic signal comparator for detecting the presence or absence of the received diagnostic light converted into an electrical signal, and a light transmitting diagnostic light is provided at the end of the optical cable on the flash light detecting section side. Irradiates the fluorescent light as diagnostic light Gas insulated equipment failure point locating system characterized by comprising providing a fluorescent substance that. 2. The apparatus according to claim 1, wherein the fluorescent substance is provided at the tip of the optical fiber for receiving light and the optical fiber for transmitting diagnostic light, respectively. 3. The light guide glass according to claim 1, wherein the fluorescent material is provided on a surface of the light guide glass facing an end of the optical cable.
Fault locating device for gas-insulated equipment as described in the above. 4. The apparatus for locating a fault in a gas-insulated device according to claim 3, wherein a fluorescent substance is filled in a concave hole formed in the surface of the light guide glass facing the end of the optical cable. 5. The apparatus according to claim 3, wherein a fluorescent substance is applied to a surface of the light guide glass facing the optical cable. 6. A flashlight detecting section provided in a sealed container of a gas insulating device for guiding flashlight generated in the container to the outside via a light guide glass, and flashlight emitted from the flashlight detecting section. A fault detection system for gas-insulated equipment consisting of 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 fault point An optical cable is composed of three optical fibers, the optical fiber for receiving light and the optical fiber for transmitting diagnostic light and the optical fiber for receiving diagnostic light, which are provided in parallel with the optical fiber for receiving light, and the accident monitoring device includes: A diagnostic light emitting unit that generates light-transmitting diagnostic light and enters the diagnostic-light-transmitting optical fiber; and a diagnostic-signal comparator that detects the presence or absence of a received-light diagnostic light converted into an electric signal. Check the tip of the flash light detector Light transmission light fault point locating system of the gas-insulated apparatus, characterized in that formed by providing the reflective portion of the incident to the light receiving diagnostic light in the diagnostic light receiving optical fiber sending diagnostic light emitted from the optical fiber. 7. The apparatus according to claim 6, wherein the reflecting portion comprises a prism provided at a tip of the optical cable. 8. The gas-insulated equipment according to claim 6, wherein a concave portion is provided on the surface of the light guide glass facing the tip of the optical cable, and the concave portion is used as a reflective surface to constitute a reflecting portion. Orientation device. 9. A flashlight detecting section provided in a sealed container of a gas insulating device for guiding flashlight generated in the container to the outside via a light guide glass, and flashlight emitted from the flashlight detecting section. A fault detection system for gas-insulated equipment consisting of 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 fault point A fluorescent substance at the end of the optical fiber for light reception on the side of the flashlight detector, and a light guide hole for irradiating the fluorescent substance with diagnostic light transmitted from outside the flashlight detector to the fluorescent substance. In the accident monitoring device, the fluorescent substance is radiated from the light guide hole and emits fluorescence as light reception diagnosis light by the light transmission diagnosis light, and the light reception diagnosis light propagates through the light receiving optical fiber to the accident monitoring device. And converted to an electrical signal to determine its strength. Gas insulated equipment failure point locating system characterized by comprising providing a diagnostic signal comparator which compares the intensity of.