CN204214941U - Special voltmeter for relay protection system tripping circuit pressing plate input - Google Patents
Special voltmeter for relay protection system tripping circuit pressing plate input Download PDFInfo
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- CN204214941U CN204214941U CN201420610361.3U CN201420610361U CN204214941U CN 204214941 U CN204214941 U CN 204214941U CN 201420610361 U CN201420610361 U CN 201420610361U CN 204214941 U CN204214941 U CN 204214941U
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- 239000004973 liquid crystal related substance Substances 0.000 claims description 4
- 210000000080 chela (arthropods) Anatomy 0.000 claims description 3
- 238000009421 internal insulation Methods 0.000 abstract 1
- 230000015556 catabolic process Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
- 230000005226 mechanical processes and functions Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
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- Measurement Of Current Or Voltage (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
The utility model provides a special voltmeter of relay protection system tripping operation return circuit clamp plate input, includes a voltmeter, characterized by: the voltmeter has no gear selection, the shell is only provided with two positive and negative jack connectors for detecting voltage, and the shell is provided with a positive meter pen and a negative meter pen, one end of the meter pen is a clamp end, the other end of the meter pen is a plug end matched with the positive and negative jack connectors, and a high-voltage-resistant high-power resistor which is larger than or equal to 4k omega is connected between the two ends of the meter pen. The utility model discloses can avoid selecting wrong gear, avoid inserting wrong jack, even the clamp plate drops into the voltmeter and short circuit or when internal insulation is punctured appear, also can ensure to measure safety.
Description
Technical field
The utility model relates to a kind of relay protection system trip(ping) circuit pressing plate and drops into specialized voltages table.
Background technology
The safe operation of relay protection system be the most important safety guarantee of electric system, and in relay protection system, the safe operation of relevant device is even more important.Because the singularity of the equipment such as protective relaying device, in trip(ping) circuit, " pressing plate " that must design is the important leverage means guaranteeing relay protection system safe operation.Substation field code clear stipulaties: operating isolating switch; true without after " one end positive electricity, one end negative electricity " voltage with high internal resistance voltage table measuring and protecting pressing plate two ends before dropping into protection pressing plate or aut.eq. pressing plate, protection or aut.eq. pressing plate can be dropped into.In prior art, work about electric power personnel are the voltage adopting multimeter measuring pressure plate opening two ends, but in actual mechanical process, when measuring pressure plate both end voltage, time have misuse multimeter electric current gear or resistance grade pressure measurement plate both end voltage cause the situation of isolating switch misoperation to occur; Also there are operating personnel to make pressing plate through multimeter short circuit over the ground wire wrong plug jack, cause the situation of line switching tripping operation in operation to occur; In addition, when measuring with multimeter, insulating material is breakdown sometimes, make pressing plate over the ground short circuit cause operating line switching to trip.Above situation all belongs to the potential safety hazard existed when using multimeter measuring pressure plate voltage, have impact on the reliability of power supply, causes harmful effect, bring economic loss to society to the normal electricity consumption of user.
Utility model content
Technical problem to be solved in the utility model, even if being just to provide that the insulation of one voltage table is breakdown also can not short circuit, nor the relay protection system trip(ping) circuit pressing plate that can produce maloperation drops into specialized voltages table.
Solve the problems of the technologies described above, the utility model takes following scheme:
A kind of pressing plate drops into specialized voltages table, comprise a voltage table, it is characterized in that: described voltage table is selected without gear, housing is only provided with the both positive and negative polarity female plug that two are detected voltage, be furnished with positive test pencil and negative test pencil, one end of test pencil is pincers end, the other end is the plug end coordinating both positive and negative polarity female plug, is connected to the high pressure resistant high-power resistance that is more than or equal to 4k Ω between two ends.
On the basis of the above, the utility model can also do further improvement:
Described voltmeter circuit comprises the sample circuit, amplifying circuit, A/D convertor circuit, CPU and the liquid crystal display that connect successively, and display display detects voltage graph.
The utility model has the following advantages and good effect:
(1) do not have gear to select, avoid the situation selecting wrong gear;
(2) be only provided with two test pencil jacks and avoid wrong plug jack;
(3) pressing plate drop into voltage table test pencil in increase high pressure resistant high-power resistance, even if pressing plate drop into voltage table occur short circuit or built-in electrical insulation breakdown time, also can guarantee measure safety.
Accompanying drawing explanation
Fig. 1 is that the utility model pressing plate drops into voltage table;
Fig. 2 is that the utility model pressing plate drops into voltage table test pencil;
Fig. 3 is that the utility model pressing plate drops into voltmeter circuit theory diagram.
In figure: 1-pressing plate drops into voltage table shell, 2-display, 3-test pencil negative pole jack, 4-test pencil positive pole jack, 5-power switch.
Embodiment
In order to understand the utility model better, be described further below in conjunction with the technical scheme of accompanying drawing to utility model.
See Fig. 1, Fig. 2 and Fig. 3, pressing plate of the present utility model drops into specialized voltages table embodiment, comprise a voltage table, voltage table is selected without gear, housing is only provided with the both positive and negative polarity female plug that two are detected voltage, be furnished with positive test pencil and negative test pencil, one end of test pencil is that pincers are held, the other end is the plug end coordinating both positive and negative polarity female plug, is connected to the high pressure resistant high-power resistance that is more than or equal to 4k Ω between two ends.Voltmeter circuit comprises the sample circuit, amplifying circuit, A/D convertor circuit, CPU and the liquid crystal display that connect successively, and display display detects voltage graph.Display, power switch, test pencil negative pole jack, test pencil positive pole jack are all arranged on voltage table shell.
In this example, pressing plate drops into voltage table principle of work: tested voltage enters sampling circuit device by test pencil, by sampling circuit device, electric resistance partial pressure is sampled, amplify through amplifier circuit device, then enter A/D convertor circuit device switching signal, the AD port finally outputting to CPU treating apparatus gathers, after signal received by CPU treating apparatus, process by analysis, the magnitude of voltage size tested by it and waveform are presented on liquid crystal indicator.
Claims (2)
1. a relay protection system trip(ping) circuit pressing plate drops into specialized voltages table; comprise a voltage table; it is characterized in that: described voltage table is selected without gear; housing is only provided with the both positive and negative polarity female plug that two are detected voltage; be furnished with positive test pencil and negative test pencil; one end of positive test pencil and negative test pencil is pincers end, the other end is the plug end coordinating both positive and negative polarity female plug, is connected to the high pressure resistant high-power resistance that is more than or equal to 4k Ω between two ends.
2. relay protection system trip(ping) circuit pressing plate according to claim 1 drops into specialized voltages table; it is characterized in that: described voltmeter circuit comprises the sample circuit, amplifying circuit, A/D convertor circuit, CPU and the liquid crystal display that connect successively, display display detects voltage graph.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420610361.3U CN204214941U (en) | 2014-10-22 | 2014-10-22 | Special voltmeter for relay protection system tripping circuit pressing plate input |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420610361.3U CN204214941U (en) | 2014-10-22 | 2014-10-22 | Special voltmeter for relay protection system tripping circuit pressing plate input |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204214941U true CN204214941U (en) | 2015-03-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420610361.3U Active CN204214941U (en) | 2014-10-22 | 2014-10-22 | Special voltmeter for relay protection system tripping circuit pressing plate input |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204214941U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105954572A (en) * | 2016-06-17 | 2016-09-21 | 国家电网公司 | Pressure plate special-purpose voltmeter |
| CN110879307A (en) * | 2019-11-29 | 2020-03-13 | 广州供电局有限公司 | Voltage resistance test meter based on relay protection specialty |
-
2014
- 2014-10-22 CN CN201420610361.3U patent/CN204214941U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105954572A (en) * | 2016-06-17 | 2016-09-21 | 国家电网公司 | Pressure plate special-purpose voltmeter |
| CN110879307A (en) * | 2019-11-29 | 2020-03-13 | 广州供电局有限公司 | Voltage resistance test meter based on relay protection specialty |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Hu Jun Inventor after: Li Zeshi Inventor after: Liu Naiqi Inventor after: Xiong Liangpu Inventor after: Mo Langjiao Inventor after: Yang Dexin Inventor after: Liu Yang Inventor after: Lu Kaicuan Inventor after: Li Ying Inventor after: Gu Yongkang Inventor before: Hu Jun Inventor before: Yuan Minshan Inventor before: Deng Xiaorong Inventor before: Li Baizhi Inventor before: Chen Dongxia Inventor before: Chen Qiujie Inventor before: Liu Guanke Inventor before: Zhang Yu Inventor before: Lu Kaicuan Inventor before: Huang Haiheng |