CN211652984U - Step voltage indicating system for short circuit grounding test - Google Patents
Step voltage indicating system for short circuit grounding test Download PDFInfo
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- CN211652984U CN211652984U CN201922134808.XU CN201922134808U CN211652984U CN 211652984 U CN211652984 U CN 211652984U CN 201922134808 U CN201922134808 U CN 201922134808U CN 211652984 U CN211652984 U CN 211652984U
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Abstract
The application relates to a short circuit ground connection test stride voltage indicating system, including light indicator (2), voltage line (3) that insulating pad (1), top were equipped with the light window and a plurality of to metal contact pin (4) of 0.8 ~ 1.2m each other apart from, metal contact pin (4) distribute in light indicator (2) are peripheral and ground connection, light indicator (2) at least partial embedding insulating pad (1) exposes the light window, set up the confession on insulating pad (1) voltage line (3) bury the recess of line, it is different right pass through between metal contact pin (4) voltage line (3) parallel connection is in on light indicator (2), it is mated when there is the potential difference in the ground of metal contact pin (4) contact. The utility model discloses the condition of near short circuit ground point earth's surface step voltage can be monitored to the staff the very first time before the work, has greatly improved the factor of safety in personnel and the instrument and equipment test process.
Description
Technical Field
The application belongs to the field of voltage detection, and particularly relates to a step voltage indicating system for a short circuit grounding test.
Background
The transformer substation or the transmission line inevitably generates leakage short circuit due to damage of equipment insulation or generates lightning stroke or operates overvoltage to cause short circuit grounding of a system in operation, equipment, overhead line towers or peripheral industrial equipment (oil and gas pipelines, communication base stations and the like) in the transformer substation generate step voltage due to the fact that large current flows through the ground surface near the equipment grounding device in a short time, and the step voltage easily causes electric shock damage to pedestrians on the ground surface near the short circuit grounding point.
At present, when a power equipment short circuit grounding test is simulated in a laboratory, workers or instruments and equipment want to approach a short circuit grounding point as close as possible for observation, but no effective and safe real-time monitoring means exists for ground surface step voltage signals near the short circuit grounding point, and the danger of electric shock of the workers or the instruments and equipment is inevitable.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: the step voltage indicating system for the short circuit grounding test is safe and real-time, and aims to solve the defect that in the prior art, when a laboratory simulates the short circuit grounding test of power equipment, electric shock danger exists in workers or instruments and equipment.
The utility model provides a technical scheme that its technical problem adopted is:
a step voltage indicating system for a short circuit grounding test comprises an insulating pad, an optical indicator with an optical window at the top, a voltage wire and a plurality of pairs of metal contact pins, wherein the metal contact pins are distributed around the optical indicator and are grounded, the optical indicator is at least partially embedded into the insulating pad and is exposed out of the optical window, grooves for the wire embedding of the voltage wire are formed in the insulating pad, different pairs of metal contact pins are connected in parallel to the optical indicator through the voltage wire, and when a potential difference exists between the paired metal contact pins and the ground, the optical indicator is driven by the pair of metal contact pins which generates the maximum voltage and emits indicating light.
In one embodiment, the device further comprises a camera, a processor and an alarm, wherein the camera is arranged above the light indicator, the processor is respectively connected with the camera and the alarm, and the processor sends out a signal for alarming or not to the alarm according to the indicating light shot by the camera.
In one embodiment, the camera is a 360 ° spherical camera.
In one embodiment, the light indicator comprises an indicator housing, a three-primary-color LED array arranged in the indicator housing, and a color change control part, wherein the color change control part comprises a binary counter connected with the three-primary-color LED array, and controls the three-primary-color LED array to emit indicating light with different colors according to the acquired maximum voltage.
In one embodiment, when the maximum voltage is greater than 40v and less than or equal to 60v, the indicator light is green light; when the maximum voltage is greater than 60v and less than or equal to 100v, the indicating light is yellow light; when the maximum voltage is more than 100v, the indicating light is red light.
In one embodiment, each string of the three-primary-color LED array is formed by connecting four LEDs in series, and different current-limiting resistors are arranged in an LED loop.
In one embodiment, the indicator housing and the optical window are made of acrylic organic glass.
In one embodiment, the insulating pad is a silicon rubber soft pad made of room temperature vulcanization type silicon rubber material.
In one embodiment, the insulating pad edge is provided with a concave-convex portion for being spliced with each other.
In one embodiment, the metal contact pins are copper sheets with the diameter of 4cm, and the distance between a pair of metal contact pins (4) is 0.8-1.2 m.
The utility model has the advantages that: the utility model discloses can realize when simulating power equipment short circuit ground connection test to the laboratory, near short circuit ground point earth's surface step voltage carries out real-time supervision and alarm indication, and the system can change light indicating device's color or light intensity according to the size of step voltage and report to the police, and the staff can monitor near short circuit ground point earth's surface step voltage's the condition the very first time before the work, has greatly improved the factor of safety in personnel and the instrument and equipment test process.
Drawings
The technical solution of the present application is further explained below with reference to the drawings and the embodiments.
FIG. 1 is a schematic diagram of a step voltage indicating system for a short circuit grounding test according to an embodiment of the present application;
fig. 2 is a schematic diagram of a power supply circuit of a three primary color LED array according to an embodiment of the present application.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be considered limiting of the scope of the present application. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, unless otherwise specified, "a plurality" means two or more.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art through specific situations.
The technical solutions of the present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Referring to fig. 1, a step voltage indicating system for a short-circuit grounding test includes an insulating pad 1, a light indicator 2, a metal contact pin 4 and a voltage line 3. The top of the light indicator 2 is provided with a light window for the light emitted by the light indicator 2. The metal contact pins 4 are provided with a plurality of pairs, are uniformly distributed around the light indicator 2 and are grounded, so that the step voltage in each direction can be conveniently detected. The light indicator 2 is at least partially embedded into the insulating pad 1 and exposed out of the light window, grooves for embedding power supply voltage wires 3 are formed in the insulating pad 1, and different pairs of metal contact pins 4 are connected to the light indicator 2 in parallel through the voltage wires 3. When there is a potential difference between the ground contacted by the pair of metal contact pins 4, the light indicator 2 is driven by the pair of metal contact pins 4 generating the maximum voltage and emits the indicating light. The indication light is sent through the optical window, the situation of the step voltage at the position can be judged by the indication light color or the light intensity, and by observation, before a tester enters a work site, the tester can know the higher position of the ground surface step voltage near the short circuit grounding point in advance and take prevention and control measures in advance. The insulating pad 1 and the embedded ingenious arrangement thereof can be beneficial to the original indoor pad laying requirement, extra equipment and internal decoration are not added, the experimental environment is kept clean, and the pad is very convenient to lay; the insulation pad 1 ensures the insulation of the ground, and the experimental safety is further improved.
In one embodiment, 8 voltage lines 3 in different directions are led out from the lower part of the light indicator 2 and are respectively connected with four pairs (8 directions) of metal contact pins 4 for collecting step voltages in different directions at a certain position on the ground surface near the short circuit grounding point.
In one embodiment, 8 voltage lines 3 in different directions are distributed on the bottom surface of the insulating pad 1, and in order to avoid short circuit and electromagnetic coupling between the voltage lines 3, grooves capable of being buried are processed on the bottom surface of the insulating pad 1, so that independent channels of the voltage lines 3 are not influenced.
In one embodiment, the light indicator 2 is embedded in the insulating pad 1, and the light indicator 2 only exposes the light window part when viewed from top to bottom, so that the observation is facilitated.
In one embodiment, the device further comprises a camera 5, a processor and an alarm, wherein the camera 5 is arranged above the light indicator 2, the processor is respectively connected with the camera 5 and the alarm, and the processor sends out a signal for alarming or not to the alarm according to the indicating light shot by the camera 5. In this embodiment, the processor may be a computer, the alarm may be a sound alarm or a light alarm, and the processor sends a corresponding signal to the alarm according to the shot indication light and the light or color information pre-stored in advance. Of course, the camera 5 may be replaced by another image sensor or a photosensor in a similar principle to the present embodiment.
In one embodiment, the camera 5 is a 360 ° spherical camera for full-angle synchronous shooting.
In one embodiment, the light indicator 2 comprises an indicator housing, a three primary color LED array and a color change control section arranged within the indicator housing. The indicator shell can protect internal electrical elements, the color-changing control part comprises a binary counter connected with the three-primary-color LED array, and the color-changing control part controls the three-primary-color LED array to emit indicating light with different colors according to the acquired maximum voltage. The inside of the indicator housing also comprises a power return constituted by a voltage line 3 to which a metal contact pin 4 is connected. Referring to fig. 2, in one embodiment, four parallel power supplies (V1, V2, V3, V4) are formed by power supply loops formed by four pairs of voltage lines 3 and simultaneously supply power to the three-primary-color LED array, and along with fluctuation of step voltage in various directions, according to the parallel circuit principle, the power supply voltage of the three-primary-color LED array only selects the highest value of any power branch in the parallel circuit, and at this time, the color-change control portion controls the three-primary-color LED array according to the obtained level. The color-changing control part is the key for changing color of the tricolor LED array, the color-changing control part is borne by a binary counter, and the color-changing control part controls the emission of blue, green, red or mixed color among three colors according to the acquired level.
Different colors of indicating light can accurately diagnose the step voltage condition. In one embodiment, when the maximum voltage is greater than 40v and less than or equal to 60v, the indicator light is green; when the maximum voltage is greater than 60v and less than or equal to 100v, the indicating light is yellow light; when the maximum voltage is more than 100v, the indicating light is red. In one embodiment, each string of the three-primary-color LED array is formed by connecting four LEDs in series, and different current-limiting resistors are arranged in an LED loop. Such as green light emitted by the LED when a particular leg step voltage exceeds 40 volts, yellow light emitted by the LED when a particular leg step voltage exceeds 60 volts, red light emitted by the LED when a particular leg step voltage exceeds 100 volts, and so forth. Each string of the tricolor LED array is formed by connecting four LEDs in series, and because the tube voltage drop and the luminous intensity of the red LED and the green LED are different, different current-limiting resistors are arranged in an LED loop, on one hand, the current of the LEDs is forced, and on the other hand, the luminous brightness is better matched.
In one embodiment, the indicator housing and the optical window are made of acrylic organic glass. In this embodiment, the indicator shell is a flat cylinder acrylic organic glass box, and many LED optical windows distributed on the surface of the upper end of the acrylic organic glass box are also made of acrylic organic glass material. The acrylic organic glass material has good transparency, chemical stability and insulativity, is easy to process, has beautiful appearance and is suitable for laboratories.
In one embodiment, the insulating pad 1 is a silicon rubber insulating soft pad made of room temperature vulcanizing type silicon rubber material. The RTV silica gel (room temperature vulcanized silicone rubber) has long storage period, stable performance, outstanding insulating performance and excellent adhesion, can be used for adhering common metal and non-metal materials, and is suitable for adhesion and sealing among various metals and between metal and non-metal materials.
In order to be able to vary the area and shape required for any combination according to the field in the vicinity of the short-circuit ground point, in one of the embodiments the insulating mat 1 is provided with a relief at its edges for splicing to each other. In one embodiment, the plurality of insulating pads 1 have the same structure, and the concave-convex parts are positioned around the insulating pads 1 and are in a meshed tooth shape, so that a plurality of same insulating pads 1 can be spliced conveniently.
In one embodiment, the metal contact pins 4 are copper sheets with the diameter of 4cm, and the distance between the pair of metal contact pins 4 is 0.8-1.2 m so as to meet the step characteristics of a human body. In different embodiments, the distance between the pair of metal contact pins 4 may be 0.8m, 1.0m, or 1.2m, etc., due to the property of the step voltage, when the distance between the pair of metal contact pins 4 is less than 0.8m, the risk of missing detection and missing alarm of the step voltage exists, and when the distance is too large, the risk of false alarm exists. Considering the step length of human, the surface conduction efficiency, etc. comprehensively, it is preferable that the distance between the pair of metal contact pins 4 is 1 m. The utility model has the advantages that: the utility model discloses can realize when simulating power equipment short circuit ground connection test to the laboratory, near short circuit ground point earth's surface step voltage carries out real-time supervision and alarm indication, and the system can change light indicating device's color or light intensity according to the size of step voltage and report to the police, and the staff can monitor near short circuit ground point earth's surface step voltage's the condition the very first time before the work, has greatly improved the factor of safety in personnel and the instrument and equipment test process.
In light of the foregoing description of the preferred embodiments according to the present application, it is to be understood that various changes and modifications may be made without departing from the spirit and scope of the invention. The technical scope of the present application is not limited to the contents of the specification, and must be determined according to the scope of the claims.
Claims (10)
1. The short circuit grounding test step voltage indicating system is characterized by comprising an insulating pad (1), a light indicator (2) with a light window arranged at the top, a voltage wire (3) and a plurality of pairs of metal contact pins (4), wherein the metal contact pins (4) are distributed around the light indicator (2) and are grounded, the light indicator (2) is at least partially embedded into the insulating pad (1) and is exposed out of the light window, a groove for the voltage wire (3) to be embedded is formed in the insulating pad (1), different pairs of metal contact pins (4) are connected onto the light indicator (2) in parallel through the voltage wire (3), and when a potential difference exists between the paired ground contacted by the metal contact pins (4), the light indicator (2) is driven by the pair of metal contact pins (4) which generate the maximum voltage and emits indicating light.
2. The short circuit grounding test step voltage indicating system as claimed in claim 1, further comprising a camera (5), a processor and an alarm, wherein the camera (5) is arranged above the light indicator (2), the processor is respectively connected with the camera (5) and the alarm, and the processor sends out a signal whether to alarm or not to the alarm according to the indicating light shot by the camera (5).
3. The short circuit grounding test step voltage indication system according to claim 2, characterized in that the camera (5) is a 360 ° spherical camera.
4. The short-circuit grounding test step voltage indicating system as claimed in claim 1, wherein the light indicator (2) comprises an indicator housing, a three-primary-color LED array disposed in the indicator housing, and a color change control portion, the color change control portion comprises a binary counter connected to the three-primary-color LED array, and the color change control portion controls the three-primary-color LED array to emit indicating light of different colors according to the acquired maximum voltage.
5. The short-circuit grounding test step voltage indicating system as claimed in claim 4, wherein when the maximum voltage is greater than 40v and less than or equal to 60v, the indicating light is green light; when the maximum voltage is greater than 60v and less than or equal to 100v, the indicating light is yellow light; when the maximum voltage is more than 100v, the indicating light is red light.
6. The short-circuit grounding test step voltage indicating system as claimed in claim 4, wherein each string of the three-primary-color LED array is formed by connecting four LEDs in series, and different current-limiting resistors are arranged in an LED loop.
7. The short-circuit grounding test step voltage indicating system as claimed in claim 4, wherein the indicator housing and the optical window are made of acrylic organic glass.
8. The short circuit grounding test step voltage indicating system according to claim 1, wherein the insulating pad (1) is a silicon rubber soft pad made of room temperature vulcanizing type silicon rubber material.
9. The short-circuit grounding test step voltage indication system as claimed in claim 1, characterized in that the edges of the insulating mat (1) are provided with irregularities for splicing to each other.
10. The short circuit grounding test step voltage indicating system as claimed in claim 1, wherein the metal contact pins (4) are copper sheets with a diameter of 4cm, and a distance between a pair of the metal contact pins (4) is 0.8-1.2 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922134808.XU CN211652984U (en) | 2019-12-03 | 2019-12-03 | Step voltage indicating system for short circuit grounding test |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922134808.XU CN211652984U (en) | 2019-12-03 | 2019-12-03 | Step voltage indicating system for short circuit grounding test |
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| CN211652984U true CN211652984U (en) | 2020-10-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110865229A (en) * | 2019-12-03 | 2020-03-06 | 国网河南省电力公司电力科学研究院 | Step voltage indicating system for short circuit grounding test |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110865229A (en) * | 2019-12-03 | 2020-03-06 | 国网河南省电力公司电力科学研究院 | Step voltage indicating system for short circuit grounding test |
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