CN2634490Y - Single clip mouth detection head for earthed resistor meter - Google Patents
Single clip mouth detection head for earthed resistor meter Download PDFInfo
- Publication number
- CN2634490Y CN2634490Y CN 03255283 CN03255283U CN2634490Y CN 2634490 Y CN2634490 Y CN 2634490Y CN 03255283 CN03255283 CN 03255283 CN 03255283 U CN03255283 U CN 03255283U CN 2634490 Y CN2634490 Y CN 2634490Y
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- grounding
- current coil
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Abstract
The utility model relates to a single jaw instrument head for grounding resistance meter, comprising a voltage coil, a current coil with an outer shielding layer, and a concentric annulus composed of the shielding layer between the coils, filled with engineering plastics and fixed in a shell. The leading-out wires of the coils are connected with the circuit part of a grounding resistance; the shell is integrated with the casing of the grounding resistance and is capable to be opened or closed. When being used for detection, the utility model does not need to drive subsidiary piles or to interrupt the grounding. As soon as a single jaw sleeve is connected to a grounding wire, the grounding resistance value can be detected. Therefore, the utility model has the advantages of convenient operation, quick detection and high anti-interference.
Description
Technical field
The utility model relates to the electric quantity test instrument, particularly a kind of ground meter single jaw measuring head.
Background technology
No matter be power transmission and transforming equipment, electromechanical equipment, or the good earth of buildings greatly, all be important assurance to normal operation of equipment and life security.Except earthing device to new installation, need test with outside determining to adhere to specification, to making regular check on of earthing device, also be the unique foundation that guarantees the equipment ground reliability.At present, known hand-rail type grounding resistance tester is checked stake resistance, and its ultimate principle is a bikini voltage drop method.The operability that digital afterwards earth resistance tester is reliable and stable with it, measuring accuracy is high and preferable, part replaces.But hand-rail type or digital earth resistance tester all have the following disadvantages: 1. must beat current potential, electric current auxiliary pile during on-the-spot test, this will make testing carry out to the firm occasion of grounds such as built-up city; 2. must detect ground wire with potential pole, two jaws of the electric current utmost point,, operate also pretty troublesome because of the sampling location difference will cause measuring error; 3. ground loop must be cut off, the normal trouble free service of equipment in service can be influenced; 4. need calculate through certain reading, could obtain measurement result, use inconvenient.
Summary of the invention
The utility model is in order to solve the existing existing technical matters of earth resistance tester complex operation, and a kind of auxiliary pile of need not beating is provided, single jaw measuring head that can online detection.
According to above-mentioned purpose, the utility model provides a kind of ground meter single jaw measuring head, is made of potential winding and extension line, current coil and extension line, screen layer and shell; Screen layer between wherein potential winding, current coil reach is formed donut, current coil also has screen layer outward, is fixed in the shell by the engineering plastics cast, and wherein extension line is connected with the circuit part of ground meter, shell and ground meter casing fuse, and can open or closure.
The utility model must not be beaten auxiliary pile owing to taked above technical measures when detecting stake resistance, must not interrupt ground connection, as long as the single jaw pincers are entangled ground lead, can record grounding resistance.Therefore have easy to operate, measure rapidly and advantage such as antijamming capability is strong.
Description of drawings
Fig. 1 is an electrical schematic diagram of the present utility model.
Fig. 2 is a structural representation of the present utility model.
Embodiment
As shown in Figure 1, maximum characteristics of the present utility model are that potential winding 3 and current coil 5 are placed in the jaw 1, become the measuring head of single jaw.Need only press the jaw spanner (not drawing among the figure) of ground meter during operation, jaw 1 is opened, entangle tested ground wire 2 again and unclamp spanner, jaw 1 closure, potential winding 3, current coil 5 also constitute closed circuit simultaneously.Instrument potential circuit V exports an oscillating voltage, and this voltage will produce an induction current in the ground wire 2 of ground loop, and induction current receives and input instrument current circuit I through current coil 5.Oscillating voltage and induction current convert corresponding stake resistance to through instrument data treatment circuit V/I, can directly show on the display screen LCD of instrument.
As shown in Figure 2, be the longitudinal sectional view of ground meter with the single jaw measuring head, the just composition surface of single jaw two halves.It is made of potential winding 3 and extension line 4, current coil 5 and extension line 6, screen layer 7, screen layer 8 and shell 9.Screen layer 8 between wherein potential winding 3, current coil 5 reach is formed donuts, and shielding screen 7 is also arranged outside the current coil 5, is poured into a mould by engineering plastics 10 to be fixed in the shell 9.Wherein extension line 4,6 is connected with circuit part V, the I of stake resistance respectively, and shell 9 fuses with the ground meter casing.Because voltage, two coils of electric current place same jaw, will produce electromagnetic interference (EMI), influence measuring accuracy.The utility model has been taked two measures: 1. be provided with three road screen layers 8 between potential winding 3 and current coil 5, can effectively prevent between oscillating voltage and the induction current problem of mutual interference mutually; 2. the screen layer 7 outside the current coil 5 can prevent effectively that external electromagnetic field from disturbing faradic power frequency.
Claims (1)
1. a ground meter single jaw measuring head is characterized in that: be made of potential winding and extension line, current coil and extension line, screen layer and shell; Screen layer between wherein potential winding, current coil reach is formed donut, and current coil also has screen layer outward, is fixed in the shell by the engineering plastics cast; Wherein extension line is connected with the circuit part of ground meter, and shell and ground meter casing fuse, and can open or closure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03255283 CN2634490Y (en) | 2003-07-03 | 2003-07-03 | Single clip mouth detection head for earthed resistor meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03255283 CN2634490Y (en) | 2003-07-03 | 2003-07-03 | Single clip mouth detection head for earthed resistor meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2634490Y true CN2634490Y (en) | 2004-08-18 |
Family
ID=34294888
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03255283 Expired - Fee Related CN2634490Y (en) | 2003-07-03 | 2003-07-03 | Single clip mouth detection head for earthed resistor meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2634490Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102636722A (en) * | 2012-04-27 | 2012-08-15 | 广东电网公司肇庆供电局 | Detection device for preventing switching-on of grounding wires |
| CN102749524A (en) * | 2012-07-25 | 2012-10-24 | 上海电信工程有限公司 | Method for measuring ground resistance with clamp-on ground resistance tester |
| CN103022736A (en) * | 2012-12-11 | 2013-04-03 | 辽宁省电力有限公司朝阳供电公司 | Ground lead needle holder |
| CN106483382A (en) * | 2016-11-23 | 2017-03-08 | 云南电网有限责任公司电力科学研究院 | A kind of GIS circuit loop resistance measuring instrument and measuring method |
| CN108459207A (en) * | 2018-07-06 | 2018-08-28 | 广东电网有限责任公司 | Grounding measurement device and grounding wire detection system |
| CN108490307A (en) * | 2018-07-06 | 2018-09-04 | 广东电网有限责任公司 | Grounding integrated device and grounding detection system |
| CN108490316A (en) * | 2018-07-06 | 2018-09-04 | 广东电网有限责任公司 | Intelligent distribution network grounding wire device and intelligent distribution network grounding wire grounding measurement system |
| CN114034933A (en) * | 2021-11-12 | 2022-02-11 | 陕西省地方电力(集团)有限公司渭南供电分公司 | Detection circuit for ground wire grounding resistance |
-
2003
- 2003-07-03 CN CN 03255283 patent/CN2634490Y/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102636722A (en) * | 2012-04-27 | 2012-08-15 | 广东电网公司肇庆供电局 | Detection device for preventing switching-on of grounding wires |
| CN102636722B (en) * | 2012-04-27 | 2014-12-10 | 广东电网公司肇庆供电局 | Detection device for preventing switching-on of grounding wires |
| CN102749524A (en) * | 2012-07-25 | 2012-10-24 | 上海电信工程有限公司 | Method for measuring ground resistance with clamp-on ground resistance tester |
| CN103022736A (en) * | 2012-12-11 | 2013-04-03 | 辽宁省电力有限公司朝阳供电公司 | Ground lead needle holder |
| CN103022736B (en) * | 2012-12-11 | 2016-04-20 | 国网辽宁省电力有限公司朝阳供电公司 | Ground lead needle holder |
| CN106483382A (en) * | 2016-11-23 | 2017-03-08 | 云南电网有限责任公司电力科学研究院 | A kind of GIS circuit loop resistance measuring instrument and measuring method |
| CN108459207A (en) * | 2018-07-06 | 2018-08-28 | 广东电网有限责任公司 | Grounding measurement device and grounding wire detection system |
| CN108490307A (en) * | 2018-07-06 | 2018-09-04 | 广东电网有限责任公司 | Grounding integrated device and grounding detection system |
| CN108490316A (en) * | 2018-07-06 | 2018-09-04 | 广东电网有限责任公司 | Intelligent distribution network grounding wire device and intelligent distribution network grounding wire grounding measurement system |
| CN114034933A (en) * | 2021-11-12 | 2022-02-11 | 陕西省地方电力(集团)有限公司渭南供电分公司 | Detection circuit for ground wire grounding resistance |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |