CN203204111U - Current sealing and detecting device - Google Patents
Current sealing and detecting device Download PDFInfo
- Publication number
- CN203204111U CN203204111U CN 201320228086 CN201320228086U CN203204111U CN 203204111 U CN203204111 U CN 203204111U CN 201320228086 CN201320228086 CN 201320228086 CN 201320228086 U CN201320228086 U CN 201320228086U CN 203204111 U CN203204111 U CN 203204111U
- Authority
- CN
- China
- Prior art keywords
- current
- insulation crust
- led light
- electric current
- detecting device
- 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.)
- Expired - Fee Related
Links
- 238000007789 sealing Methods 0.000 title abstract description 8
- 238000004804 winding Methods 0.000 claims abstract description 26
- 238000009413 insulation Methods 0.000 claims description 23
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 14
- 230000001681 protective effect Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000007257 malfunction Effects 0.000 description 3
- 229920000965 Duroplast Polymers 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001012 protector Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 208000032368 Device malfunction Diseases 0.000 description 1
- KYIKRXIYLAGAKQ-UHFFFAOYSA-N abcn Chemical compound C1CCCCC1(C#N)N=NC1(C#N)CCCCC1 KYIKRXIYLAGAKQ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Images
Landscapes
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The utility model discloses a current sealing and detecting device relating to the technical field of special devices used for manufacturing, assembling or maintaining plates or switches. The current sealing and detecting device includes an insulating shell, a lead and four current transformers. The current transformers are fixed in the insulating shells. First primary windings composed of leads are coiled outside the current transformers. One ends of the four primary windings are protruded outside the insulating shell while the other ends of the four primary windings are connected together. Secondary windings of the current transformer are provided with LED indicating lamps respectively. The insulating shell is provided with an LED indicating lamp observing hole. The current sealing and detecting device has characteristics of convenient usage and high operation safety.
Description
Technical field
The utility model relates to the isolated plant technical field of manufacturing, assembling or maintenance dish or switch, relates in particular to a kind of electric current envelope checking device.
Background technology
For the personnel that are engaged in the relay protection specialty, the work on the ac circuit is very many.Current return must reliably seal, and prevents open circuit; Voltage circuit need prevent short circuit.Our the normal envelope current methods that adopts is to use electric current envelope line.But because the consequence of current return open circuit is very serious, may cause protective device malfunction or tripping, even may make the high pressure progress of disease of primary equipment jeopardize personal safety to secondary.After hours, the current return that seals must be removed, as is retained in the working site, may cause the protective device tripping, or malfunction, causes large-area power failure.Traditional electric current envelope line does not have the function in standby current loop, can only be by monitoring clamp table or the artificial supervision of device sampling.So when the sealing current secondary circuit, the staff is double cautious, cause work efficiency very low like this.
When some visual plants that do not have a power failure carry out all schools, as bus differential protection, adopt electric current envelope inspection device to be necessary; Some current coil uses for a plurality of protective devices, when one of them protective device is carried out work, and in order to prevent from influencing other protective devices, need be the reliable short envelope of current return, this short envelope just need not use the electric current envelope to examine device.At the protection specialty, in the process of the test of protective device, can on the terminal row of protective device, add electric current line or pressure-wire, can use wire clamp to clamp terminal row usually, or primary current or pressure-wire are opened, then insert test wire.In the process of test, if accidentally test wire is bumped or test wire is fixing does not tightly come off, will cause voltage short circuit or current open, burn protective device or test unit.
The utility model content
Technical problem to be solved in the utility model provides a kind of electric current envelope checking device, and described device has easy to use, the characteristics that processing safety is high.
For solving the problems of the technologies described above, technical solution adopted in the utility model is: a kind of electric current envelope checking device, it is characterized in that comprising insulation crust, lead and four current transformers, described current transformer is fixed in the described insulation crust, outer felt at described current transformer is wound with a winding that is made of lead, one end of four windings stretches out described insulation crust, the other end of four windings connects together, the Secondary Winding of each current transformer is provided with LED light, and described insulation crust is provided with the LED light viewport.
Preferably: the Secondary Winding of each current transformer is provided with two LED light, and above-mentioned two LED light are connected in parallel.
Preferably: described insulation crust is provided with the dish terminal, and described dish terminal is provided with two, is fixed on the front side of described shell.
Preferably: described insulation crust is provided with suppending hole.
The beneficial effect that adopts technique scheme to produce is: during detection, only an end of four windings of described device need be sealed line mutually with A, B, C, the N four of current return respectively and be connected and get final product.Connect the back and just can determine by the situation of lighting of observing LED light whether current return is sealed, needn't whether reduce by the sampled value of observing protector or the value by supervision clamp table realizes intuitive display; observe easily; wiring is simple, and is easy to use, safe.
LED light is to light by the voltage that electric current envelope line induces, and does not influence the reliability of primary current envelope line, has fundamentally guaranteed the security of electric current envelope line; Secondary loop of mutual inductor in operation exists induced voltage always, guarantees that LED light is lighted always, plays indicative function, thus avoided malfunction, mistake tear open and end-of-job after leak the possibility of tearing electric current envelope line open.Described insulation crust is provided with the dish terminal, when described device does not use with a winding around thereon, be convenient for carrying and prevent between the lead to twine mutually; Also be provided with suppending hole on the described insulation crust, make things convenient for it when not using, to hang on the wall by arranging of suppending hole, reduce and take up an area of the space.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Fig. 1 is main TV structure synoptic diagram of the present utility model;
Fig. 2 is inner structure synoptic diagram of the present utility model;
Wherein: 1, insulation crust 2, lead 3, current transformer 4, LED light 5, LED light viewport 6, dish terminal 7, suppending hole.
Embodiment
Shown in Fig. 1-2, a kind of electric current envelope checking device, it is characterized in that comprising insulation crust 1, lead 2 and four current transformers 3, described current transformer 3 is fixed in the described insulation crust 1, outer felt at described current transformer 3 is wound with a winding that is made of lead 2, one end of four windings stretches out described insulation crust 1, the other end of four windings connects together, the Secondary Winding of each current transformer 3 is provided with LED light 4, and described insulation crust is provided with LED light viewport 5.For the free end that prevents a winding twines mutually, be provided with dish terminal 6 at described insulation crust 1, described dish terminal 6 is provided with two, is fixed on the front side of described shell.Convenient for hook, be provided with suppending hole 7 at described insulation crust 1.The Secondary Winding of each current transformer is provided with two LED light 4, and above-mentioned two LED light are connected in parallel.
Described device utilizes the principle of current transformer, with the secondary circuit of electric current as the primary current that detects current transformer, current transformer is enclosed within on the primary current envelope line, only there is electromagnetic connection with electric current envelope line, nothing is contacted directly, light light emitting diode by induction current, thereby realize the automatic detection of electric current.In order to improve the reliability of detection, adopt the mode of two light emitting diode parallel connections to replace single diode.The starting current of light emitting diode is 10-12mA, and running current is 10mA-5A.The Current Transformer Secondary number of turn is 5 circles, and one time the number of turn is twined by oneself.
When around 1 circle, feed the electric current of 50mA, diode can correctly be lighted.The out-of-balance current In of current return N phase when measuring normal operation by 10 on-the-spot use clamp tables, the result is not more than 8mA.Simultaneously, use the technology of colding pressing, with joint and conductor compression jointing.The shell of described device is selected the duroplasts of the voltage of anti-1000V for use, and insulating property are good, and is solid and reliable.
Current return tetrad contact pin adopts the test wire contact pin supporting with terminal row, and the distance between the contact pin is consistent with terminal row, can conveniently be inserted in ac terminal row's the testing terminal, guarantees that the current return sealing is reliable.The voltage dedicated pins can directly be screwed on the nut at terminal row middle part with the screw thread design, and the other end designs for wiring, and test wire can be linked in the contact pin.
Described device adopts 4 small current mutual inductors, is respectively applied to the current surveillance of four current returns of ABCN.Current transformer adopts overload capacity: 1-20A to satisfy on-the-spot service requirement.LED light luminosity: 0.1mcd/A, guarantee led lighting night, daytime human eye all can differentiate easily; Size is: 31mm * 22mm * 10mm, rationally arrange, and make the electric current envelope checking device moderate dimensions of moulding, the scene of being convenient to is carried and is used.Winding of small current mutual inductor adopts the special-purpose annealed copper wire of current transformer, and number of turn of winding is 4 circles, feeds the 13mA electric current diode is correctly lighted.
The wiring employing standard in sealing current loop is numbered when the regulation core is 2.5 squares in the quick attachment plug of flat of GB17196-1997, and stretching resistance must not be less than 230 newton.Use tension tester, test under 500 newton's pulling force, joint is excellent.The shell of envelope checking device is selected the duroplasts of the voltage of anti-1000V for use, and insulating property are good, and are solid and reliable.
Current return tetrad fork adopts the test wire contact pin supporting with terminal row, and the distance between the contact pin is consistent with terminal row, can conveniently be inserted in ac terminal row's the testing terminal, guarantees that the current return sealing is reliable.The voltage dedicated pins can directly be screwed on the nut at terminal row middle part with the screw thread design, and the other end designs for wiring, and test wire can be linked in the contact pin.In voltage circuit work, use rotatable fixing secondary line plug, plug is fixed on the terminal row by rotation, and it is good to apply mechanically the insulating sheath plastic packaging outward, avoids occurring test wire and bumps or come off automatically, causes the phenomenon of current open or voltage short circuit.
During detection, only an end of four windings of described device need be sealed line mutually with A, B, C, the N four of current return respectively and be connected and get final product.Connect the back and just can determine by the situation of lighting of observing LED light whether current return is sealed, needn't whether reduce by the sampled value of observing protector or the value by supervision clamp table realizes intuitive display; observe easily; wiring is simple, and is easy to use, safe.
LED light is to light by the voltage that electric current envelope line induces, and does not influence the reliability of primary current envelope line, has fundamentally guaranteed the security of electric current envelope line; Secondary loop of mutual inductor in operation exists induced voltage always, guarantees that LED light is lighted always, plays indicative function, thus avoided malfunction, mistake tear open and end-of-job after leak the possibility of tearing electric current envelope line open.Described insulation crust is provided with the dish terminal, when described device does not use with a winding around thereon, be convenient for carrying and prevent between the lead to twine mutually; Also be provided with suppending hole on the described insulation crust, make things convenient for it when not using, to hang on the wall by arranging of suppending hole, reduce and take up an area of the space.
Used specific case herein principle of the present utility model and embodiment thereof are set forth, the explanation of above embodiment is just with helping understand method of the present utility model and core concept thereof.Should be pointed out that for the person of ordinary skill of the art, can also carry out some improvement and modification to the utility model under the prerequisite that does not break away from the utility model principle, these improvement and modification also fall in the protection domain of the utility model claim.
Claims (4)
1. an electric current seals checking device, it is characterized in that comprising insulation crust (1), lead (2) and four current transformers (3), described current transformer (3) is fixed in the described insulation crust (1), outer felt at described current transformer (3) is wound with a winding that is made of lead (2), one end of four windings stretches out described insulation crust (1), the other end of four windings connects together, the Secondary Winding of each current transformer (3) is provided with LED light (4), and described insulation crust is provided with LED light viewport (5).
2. a kind of electric current envelope checking device according to claim 1 is characterized in that the Secondary Winding of each current transformer is provided with two LED light (4), and above-mentioned two LED light are connected in parallel.
3. a kind of electric current envelope checking device according to claim 1 is characterized in that described insulation crust (1) is provided with dish terminal (6), and described dish terminal (6) is provided with two, is fixed on the front side of described shell.
4. a kind of electric current envelope checking device according to claim 1 is characterized in that described insulation crust (1) is provided with suppending hole (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320228086 CN203204111U (en) | 2013-04-28 | 2013-04-28 | Current sealing and detecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320228086 CN203204111U (en) | 2013-04-28 | 2013-04-28 | Current sealing and detecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203204111U true CN203204111U (en) | 2013-09-18 |
Family
ID=49148207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320228086 Expired - Fee Related CN203204111U (en) | 2013-04-28 | 2013-04-28 | Current sealing and detecting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203204111U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103257301A (en) * | 2013-04-28 | 2013-08-21 | 国家电网公司 | Current sealing detection device |
| CN113125821A (en) * | 2021-04-07 | 2021-07-16 | 国网河北省电力有限公司邯郸供电分公司 | Junction box for metering secondary circuit safety arc extinction |
-
2013
- 2013-04-28 CN CN 201320228086 patent/CN203204111U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103257301A (en) * | 2013-04-28 | 2013-08-21 | 国家电网公司 | Current sealing detection device |
| CN113125821A (en) * | 2021-04-07 | 2021-07-16 | 国网河北省电力有限公司邯郸供电分公司 | Junction box for metering secondary circuit safety arc extinction |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204422694U (en) | A kind of New single-phase Three-hole socket testing circuit | |
| CN105116180B (en) | Portable experiment short jumper device | |
| CN203204111U (en) | Current sealing and detecting device | |
| CN103257301A (en) | Current sealing detection device | |
| CN102522708B (en) | Sealing current device with automatic detector | |
| CN203243023U (en) | Leakage alarm and protection circuit | |
| CN205982495U (en) | Electric control line school lineman's utensil | |
| CN104020326B (en) | A kind of switching device tested used by switch machine characteristic | |
| CN209215471U (en) | A kind of indicator whether detection distribution power supply line has electric current to pass through | |
| CN204439773U (en) | A kind of circuit checker | |
| CN204694795U (en) | Surge arrester failure indicating circuit | |
| CN203983932U (en) | A kind of low-voltage circuit Special lightning protection device | |
| CN203981715U (en) | A kind of Test Switchboard mechanical property switching device used | |
| CN203455044U (en) | Real-time water level monitoring device for cable tunnel | |
| CN2896506Y (en) | GFCI with fault indication function | |
| CN203387028U (en) | Shorting device for shorting current terminal | |
| CN206894222U (en) | A kind of ground wire and leakage protection circuit | |
| CN202204838U (en) | Voltage wiring terminal | |
| CN204536399U (en) | A kind of alterating and direct current detection system | |
| CN205406868U (en) | Electric leakage protection plug | |
| CN204287297U (en) | High-voltage charge display device | |
| CN204030297U (en) | A kind of power distribution cabinet with ageing of insulation status monitoring function | |
| CN204441634U (en) | There is the leakage protecting plug of the abnormal deixis of current supply circuit | |
| CN203479849U (en) | Test seal line | |
| CN203941221U (en) | Without electric display |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130918 Termination date: 20180428 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |