CN103257301A - Current sealing detection device - Google Patents
Current sealing detection device Download PDFInfo
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- CN103257301A CN103257301A CN2013101554749A CN201310155474A CN103257301A CN 103257301 A CN103257301 A CN 103257301A CN 2013101554749 A CN2013101554749 A CN 2013101554749A CN 201310155474 A CN201310155474 A CN 201310155474A CN 103257301 A CN103257301 A CN 103257301A
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- current
- insulation crust
- led light
- electric current
- detection device
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Abstract
The invention discloses a current sealing detection device and relates to the technical field of dedicated devices for manufacturing, assembling and repairing disks or switches. The current sealing detection device comprises an insulating outer shell, wires and four current transformers, wherein the current transformers are fixed in the insulating outer shell, primary windings composed of the wires are wound on the outer sides of the current transformers, one ends of the four primary windings stretch out of the insulating outer shell, and the other ends of the four primary windings are connected together, an LED indicating lamp is arranged on the secondary winding of each current transformer, and LED indicating lamp observing holes are formed in the insulating outer shell. The current sealing detection device has the advantages of being convenient to use and high in operation safety.
Description
Technical field
The present invention relates to make, assemble or the isolated plant technical field of maintenance dish or switch, relate 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.
Summary of the invention
Technical matters to be solved by this invention 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, the technical solution used in the present invention 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
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
Fig. 1 is main TV structure synoptic diagram of the present invention;
Fig. 2 is inner structure synoptic diagram of the present invention;
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 invention and embodiment thereof are set forth, the explanation of above embodiment is just with helping understand method of the present invention 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 present invention under the prerequisite that does not break away from the principle of the invention, these improvement and modification also fall in the protection domain of claim of the present invention.
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 |
|---|---|---|---|
| CN2013101554749A CN103257301A (en) | 2013-04-28 | 2013-04-28 | Current sealing detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101554749A CN103257301A (en) | 2013-04-28 | 2013-04-28 | Current sealing detection device |
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| CN103257301A true CN103257301A (en) | 2013-08-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2013101554749A Pending CN103257301A (en) | 2013-04-28 | 2013-04-28 | Current sealing detection device |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201184891Y (en) * | 2008-01-11 | 2009-01-21 | 俞盛荣 | Detection module for short/open circuit of current mutual inductor secondary circuit |
| CN201576862U (en) * | 2009-09-18 | 2010-09-08 | 北京市电力公司 | Short circuit seal used for plugging in current test terminal |
| KR101104839B1 (en) * | 2010-10-05 | 2012-01-16 | 한국전력공사 | System and method for testing winding conditions of pad-mounted transformers |
| CN102522708A (en) * | 2011-12-14 | 2012-06-27 | 保定供电公司 | Sealing current device with automatic detector |
| CN202797561U (en) * | 2012-10-15 | 2013-03-13 | 沧州供电公司 | Current secondary loop sealing wire |
| CN203204111U (en) * | 2013-04-28 | 2013-09-18 | 国家电网公司 | Current sealing and detecting device |
-
2013
- 2013-04-28 CN CN2013101554749A patent/CN103257301A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201184891Y (en) * | 2008-01-11 | 2009-01-21 | 俞盛荣 | Detection module for short/open circuit of current mutual inductor secondary circuit |
| CN201576862U (en) * | 2009-09-18 | 2010-09-08 | 北京市电力公司 | Short circuit seal used for plugging in current test terminal |
| KR101104839B1 (en) * | 2010-10-05 | 2012-01-16 | 한국전력공사 | System and method for testing winding conditions of pad-mounted transformers |
| CN102522708A (en) * | 2011-12-14 | 2012-06-27 | 保定供电公司 | Sealing current device with automatic detector |
| CN202797561U (en) * | 2012-10-15 | 2013-03-13 | 沧州供电公司 | Current secondary loop sealing wire |
| CN203204111U (en) * | 2013-04-28 | 2013-09-18 | 国家电网公司 | Current sealing and detecting device |
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Application publication date: 20130821 |