CN103941048A - Method for measuring voltage to earth of protective pressing plate and special grounded port - Google Patents
Method for measuring voltage to earth of protective pressing plate and special grounded port Download PDFInfo
- Publication number
- CN103941048A CN103941048A CN201410202539.5A CN201410202539A CN103941048A CN 103941048 A CN103941048 A CN 103941048A CN 201410202539 A CN201410202539 A CN 201410202539A CN 103941048 A CN103941048 A CN 103941048A
- Authority
- CN
- China
- Prior art keywords
- pressing plate
- copper bar
- interface body
- nut
- hollow copper
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
The invention relates to a method for measuring the voltage to earth of a protective pressing plate and a special grounded port, belonging to the technical filed of electric power measurement. The technical scheme is that the special grounded port comprises a ground terminal rod (1), a port body (2), a locknut (2), a front nut (4) and a hollow copper rod (6), wherein the port body is in a hollow cylinder structure, the outer surface is provided with a locking thread (5), the locknut and the front nut are arranged on the locking thread in a matching way, and the front nut is adjacent to the front end of the port body. A hollow cylinder at the front end of the port body is internally provided with a hollow copper rod, the ground terminal rod is arranged in the hollow cylinder at the rear end of the port body, and the ground terminal rod and the hollow copper rod are fixedly connected to be in an integrated structure; and the inner diameter of the hollow copper rod is matched with the outer diameter of a pen of a universal meter. The special grounded port can be reliably connected with the grounded pen of the universal meter, so that the accuracy rate and cheapness of the protective pressing plate for testing the voltage to earth can be improved; furthermore, the special grounded port is simple in structure and convenient to use, and the problems of the imperfect earth and inconvenient operation of the protective pressing plate can be solved when the voltage to earth of the protective pressing plate is measured.
Description
Technical field
The method and the Special grounding interface that the present invention relates to a kind of measuring and protecting pressing plate voltage-to-ground, belong to power measurement technical field.
Background technology
Relay protection and aut.eq. refer to when the force device in electric system or electric system itself is broken down or when abnormal; can send warning signal to operations staff, or directly send the orders such as tripping operation to controlled isolating switch to stop the robotization set of equipments of these event development.Separating brake and the combined floodgate of the pressing plate gauge tap that such device exports by breaker tripping and closing.The measurement of pressing plate two ends voltage-to-ground, controls power supply while being 220V direct current, for tripping operation output clamping:
(1) pressing plate is suitable for reading have over the ground-110V, end opening has 110V over the ground, and protection has outlet;
(2) pressing plate is suitable for reading have over the ground-110V, end opening has 0V over the ground, not outlet of protection;
(3) pressing plate is suitable for reading have over the ground-0V, end opening has 0V over the ground, and trip(ping) circuit broken string is obstructed;
(4) pressing plate is suitable for reading have over the ground-0V, end opening has 110V over the ground, and protection has outlet, and trip(ping) circuit is obstructed.
When preventing that relay protection and aut.eq. pressing plate from dropping into because the reasons such as plant failure cause power transmission and transforming equipment mistrip; execute-in-place code regulation: isolating switch is at closing position; before dropping into its protection and aut.eq. pressing plate, palpus is normal with high internal resistance voltage table measuring pressure plate two ends voltage-to-ground, can drop into pressing plate.Facts have proved, this is very effective technical measures that prevent switch malfunction.When preventing that relay protection and aut.eq. pressing plate from dropping into because the reasons such as plant failure cause power transmission and transforming equipment mistrip; execute-in-place code regulation: isolating switch is at closing position; before dropping into its protection and aut.eq. pressing plate, palpus is normal with high internal resistance voltage table measuring pressure plate two ends voltage-to-ground, can drop into pressing plate.Facts have proved, this is very effective technical measures that prevent switch malfunction.
At present, O&M personnel in the time of pressure measurement plate voltage, can only be with the test pencil pestle of multimeter in exposed metal/bare metal parts such as the screws of protection screen or switch cubicle as earth point.Due to screw surface oxidation etc. reason, often cause measuring voltage numerical value inaccurate, if make O&M personnel erroneous judgement, consequence will be very serious.And surveying when voltage, should hand-held multimeter, aim at respectively earth point and protect pressing plate with two test pencils simultaneously again, it is very inconvenient to operate.
Summary of the invention
The object of the invention is to provide a kind of method and Special grounding interface of measuring and protecting pressing plate voltage-to-ground, ensures that measurement result is accurate, imperfect earth and unhandy problem while solving measuring and protecting pressing plate voltage-to-ground.
Technical scheme of the present invention is:
A kind of Special grounding interface of measuring and protecting pressing plate voltage-to-ground; comprise earth terminal bar, interface body, set nut, front nut and hollow copper bar; interface body is hollow cylinder structure; outside surface is provided with locking screw; set nut and front nut all mate and are arranged on locking screw, and front nut is near the front end of interface body.
In the hollow cylinder of interface body front end, be provided with hollow copper bar, be provided with earth terminal bar in the hollow cylinder of interface body rear end, earth terminal bar and hollow copper bar are fixed together, and are structure as a whole; The test pencil external diameter of the internal diameter of hollow copper bar and multimeter matches.
Earth terminal bar is reliably connected with the protective ground copper bar of protection screen or switch cubicle, and the ground connection test pencil of multimeter inserts hollow copper bar, and hollow copper bar is reliably connected with the measurement test pencil of multimeter.
The front end of described interface body raises up, and the external diameter of projection is greater than the external diameter of locking screw, prevents that front nut from falling down.
A method for measuring and protecting pressing plate voltage-to-ground, comprises following steps:
1. adopt Special grounding interface to carry out, it comprises earth terminal bar, interface body, set nut, front nut and hollow copper bar, interface body is hollow cylinder structure, outside surface is provided with locking screw, set nut and front nut all mate and are arranged on locking screw, and front nut is near the front end of interface body; In the hollow cylinder of interface body front end, be provided with hollow copper bar, be provided with earth terminal bar in the hollow cylinder of interface body rear end, earth terminal bar and hollow copper bar are fixed together, and are structure as a whole; The test pencil external diameter of the internal diameter of hollow copper bar and multimeter matches;
2. perforate on pressing plate, the diameter of perforate is greater than the external diameter of locking screw, is less than the external diameter of set nut and front nut, and interface body is passed from perforate, and pressing plate two ends are by set nut and front fastening nuts, and interface body is installed on pressing plate;
3. earth terminal bar is reliably connected with the protective ground copper bar of protection screen or switch cubicle, and the ground connection test pencil (black test pencil) of multimeter inserts hollow copper bar, and hollow copper bar is reliably connected with the measurement test pencil (red test pencil) of multimeter;
4. the red test pencil of multimeter contacts with upper and lower mouthful of pressing plate, can measure respectively upper and lower mouthful of voltage-to-ground of pressing plate.
Ground interface design must meet " protecting indoor protection screen Special grounding network countermeasure ".The international IEC61010 technical standard of Bing An is manufactured, and technical indicator need meet GB4793.1-2007 national standard and international IEC technical standard.
The invention has the beneficial effects as follows: can reliably be connected with multimeter ground connection test pencil; improve protection pressing plate and survey voltage-to-ground accuracy rate and cheap property, simple in structure, easy to use; guarantee measurement result is accurate, imperfect earth and unhandy problem while solving measuring and protecting pressing plate voltage-to-ground.
Brief description of the drawings
Fig. 1 is embodiment of the present invention structural representation;
Fig. 2 is the present invention's scheme of installation on pressing plate;
Fig. 3 is that the present invention measures practical operation schematic diagram;
In figure: earth terminal bar 1, interface body 2, set nut 3, front nut 4, locking screw 5, hollow copper bar 6, projection 7, pressing plate 8, multimeter 9, ground connection test pencil 10, measurement test pencil 11.
Embodiment
Below in conjunction with accompanying drawing, by example, the invention will be further described.
A kind of Special grounding interface of measuring and protecting pressing plate voltage-to-ground; comprise earth terminal bar 1, interface body 2, set nut 3, front nut 4 and hollow copper bar 6; interface body is hollow cylinder structure; outside surface is provided with locking screw 5; set nut 3 and front nut 4 all mate and are arranged on locking screw 5, and front nut 4 is near the front end of interface body.
In the hollow cylinder of interface body front end, be provided with hollow copper bar 6, be provided with earth terminal bar 1 in the hollow cylinder of interface body rear end, earth terminal bar 1 is fixed together with hollow copper bar 6, is structure as a whole; The test pencil external diameter of the internal diameter of hollow copper bar 6 and multimeter matches.
The front end of described interface body raises up 7, and the external diameter of projection is greater than the external diameter of locking screw 5, prevents that front nut from falling down.
A method for measuring and protecting pressing plate voltage-to-ground, comprises following steps:
1. adopt Special grounding interface to carry out, it comprises earth terminal bar 1, interface body 2, set nut 3, front nut 4 and hollow copper bar 6, interface body is hollow cylinder structure, outside surface is provided with locking screw 5, set nut 3 and front nut 4 all mate and are arranged on locking screw 5, and front nut 4 is near the front end of interface body; In the hollow cylinder of interface body front end, be provided with hollow copper bar 6, be provided with earth terminal bar 1 in the hollow cylinder of interface body rear end, earth terminal bar 1 is fixed together with hollow copper bar 6, is structure as a whole; The test pencil external diameter of the internal diameter of hollow copper bar 6 and multimeter matches;
2. perforate on pressing plate, the diameter of perforate be greater than locking screw 5 external diameter, be less than the external diameter of set nut 3 and front nut 4, interface body is passed from perforate, pressing plate two ends are fastening by set nut 3 and front nut 4, interface body is installed on pressing plate;
3. earth terminal bar 1 is reliably connected with the protective ground copper bar of protection screen or switch cubicle, the ground connection test pencil 10(black test pencil of multimeter) insert hollow copper bar 6, hollow copper bar 6 is reliably connected with the ground connection test pencil 10 of multimeter;
4. the red test pencil of the measurement test pencil 11(of multimeter) contact with upper and lower mouthful of pressing plate, can measure respectively upper and lower mouthful of voltage-to-ground of pressing plate.
Claims (3)
1. the Special grounding interface of a measuring and protecting pressing plate voltage-to-ground, it is characterized in that comprising earth terminal bar (1), interface body (2), set nut (3), front nut (4) and hollow copper bar (6), interface body is hollow cylinder structure, outside surface is provided with locking screw (5), set nut (3) and front nut (4) all mate that to be arranged on locking screw (5) upper, and front nut (4) is near the front end of interface body;
In the hollow cylinder of interface body front end, be provided with hollow copper bar (6), be provided with earth terminal bar (1) in the hollow cylinder of interface body rear end, earth terminal bar (1) is fixed together with hollow copper bar (6), is structure as a whole; The internal diameter of hollow copper bar (6) and the test pencil external diameter of multimeter match;
Earth terminal bar (1) is reliably connected with the protective ground copper bar of protection screen or switch cubicle, and the ground connection test pencil of multimeter inserts hollow copper bar (6), and hollow copper bar (6) is reliably connected with the measurement test pencil of multimeter.
2. the Special grounding interface of a kind of measuring and protecting pressing plate voltage-to-ground according to claim 1, is characterized in that the front end of described interface body raises up (7), and the external diameter of projection is greater than the external diameter of locking screw (5).
3. a method for measuring and protecting pressing plate voltage-to-ground, is characterized in that comprising following steps:
1. adopt Special grounding interface to carry out, it comprises earth terminal bar (1), interface body (2), set nut (3), front nut (4) and hollow copper bar (6), interface body is hollow cylinder structure, outside surface is provided with locking screw (5), set nut (3) and front nut (4) all mate that to be arranged on locking screw (5) upper, and front nut (4) is near the front end of interface body; In the hollow cylinder of interface body front end, be provided with hollow copper bar (6), be provided with earth terminal bar (1) in the hollow cylinder of interface body rear end, earth terminal bar (1) is fixed together with hollow copper bar (6), is structure as a whole; The internal diameter of hollow copper bar (6) and the test pencil external diameter of multimeter match;
2. perforate on pressing plate, the diameter of perforate be greater than locking screw (5) external diameter, be less than the external diameter of set nut (3) and front nut (4), interface body is passed from perforate, and pressing plate two ends are fastening by set nut (3) and front nut (4), and interface body is installed on pressing plate;
3. earth terminal bar (1) is reliably connected with the protective ground copper bar of protection screen or switch cubicle, and the ground connection test pencil of multimeter inserts hollow copper bar (6), and hollow copper bar (6) is reliably connected with the measurement test pencil of multimeter;
4. the red test pencil of multimeter contacts with upper and lower mouthful of pressing plate, can measure respectively upper and lower mouthful of voltage-to-ground of pressing plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410202539.5A CN103941048A (en) | 2014-05-14 | 2014-05-14 | Method for measuring voltage to earth of protective pressing plate and special grounded port |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410202539.5A CN103941048A (en) | 2014-05-14 | 2014-05-14 | Method for measuring voltage to earth of protective pressing plate and special grounded port |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103941048A true CN103941048A (en) | 2014-07-23 |
Family
ID=51188798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410202539.5A Pending CN103941048A (en) | 2014-05-14 | 2014-05-14 | Method for measuring voltage to earth of protective pressing plate and special grounded port |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103941048A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH085659A (en) * | 1994-06-16 | 1996-01-12 | Chubu Electric Power Co Inc | Test plug for insertion test terminal |
| CN203103056U (en) * | 2012-12-27 | 2013-07-31 | 宁夏电力公司固原供电局 | Transformer bushing end screen grounding device |
| CN203465297U (en) * | 2013-09-17 | 2014-03-05 | 国家电网公司 | Grounding device for electrical testing |
| US20140097827A1 (en) * | 2012-10-08 | 2014-04-10 | Erick William Rudaitis | Banana jack adapter for test switch |
-
2014
- 2014-05-14 CN CN201410202539.5A patent/CN103941048A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH085659A (en) * | 1994-06-16 | 1996-01-12 | Chubu Electric Power Co Inc | Test plug for insertion test terminal |
| US20140097827A1 (en) * | 2012-10-08 | 2014-04-10 | Erick William Rudaitis | Banana jack adapter for test switch |
| CN203103056U (en) * | 2012-12-27 | 2013-07-31 | 宁夏电力公司固原供电局 | Transformer bushing end screen grounding device |
| CN203465297U (en) * | 2013-09-17 | 2014-03-05 | 国家电网公司 | Grounding device for electrical testing |
Non-Patent Citations (2)
| Title |
|---|
| 张金枝等: "一起直流一点接地误跳500kV线路原因分析", 《安徽电气工程职业技术学院学报》, vol. 16, no. 1, 31 March 2011 (2011-03-31) * |
| 袁卫华: "一起线路开关跳闸故障分析", 《科技资讯》, no. 11, 31 December 2009 (2009-12-31) * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102565696B (en) | Quick measuring device of protective pressing plate and measuring method thereof | |
| CN204405734U (en) | A kind of electric energy meter with residual current detection function | |
| CN101587176A (en) | Instrument for lightning arrester monitor test | |
| CN201788245U (en) | Online monitor device for service life of arrester with gaps | |
| CN201594108U (en) | Wide-range transformer iron core grounding current on-line monitoring sensing device | |
| KR101163963B1 (en) | Appratus for protecting surge of monitoring data | |
| CN201532453U (en) | Tester of lightning arrester monitor | |
| CN101726687A (en) | Method for monitoring one-point grounding of secondary neutral point of voltage transformer between transformer substation and power plant | |
| CN203249969U (en) | A lightning arrester having a ground resistance testing function | |
| CN211126465U (en) | Intelligent grounding monitoring device | |
| CN105467197B (en) | Integrated arrester on-Line Monitor Device | |
| CN201413370Y (en) | Detection device for surge protective device | |
| CN103267923A (en) | Safety grounding all-purpose online detector | |
| CN203811638U (en) | Special grounding interface for measuring line-to-ground voltage of protection pressure plate | |
| CN103308753A (en) | On-line overvoltage monitoring system based on switching surge current of lightning arrester | |
| CN207396654U (en) | Distribution Zinc-Oxide Arrester acceptance test device | |
| CN206401744U (en) | It is a kind of that there is the high pressure PT cabinets for detecting voltage and defencive function | |
| CN103941048A (en) | Method for measuring voltage to earth of protective pressing plate and special grounded port | |
| CN110261763A (en) | A kind of DC current inducing method for surveying breaker two-terminal-grounding branch wire time | |
| CN102074927A (en) | Earth leakage protection circuit of withstand voltage tester | |
| CN204882693U (en) | Trip protections equipment and electroscope thereof | |
| CN104316824A (en) | On-line iron core grounding current monitoring device | |
| CN205562672U (en) | Integration arrester on -line monitoring device | |
| CN104188238A (en) | High-voltage early-warning insulation boot | |
| CN210243745U (en) | Intelligent ground resistance monitoring terminal of highway lightning grounding device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140723 |