CN203909173U - Trial jump device used for residue current operated protective device - Google Patents
Trial jump device used for residue current operated protective device Download PDFInfo
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- CN203909173U CN203909173U CN201420274979.7U CN201420274979U CN203909173U CN 203909173 U CN203909173 U CN 203909173U CN 201420274979 U CN201420274979 U CN 201420274979U CN 203909173 U CN203909173 U CN 203909173U
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- Prior art keywords
- rcd
- trial jump
- electrotimer
- jump device
- current
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- 230000001681 protective effect Effects 0.000 title abstract description 5
- 238000012360 testing method Methods 0.000 claims abstract description 32
- 102100032982 CCR4-NOT transcription complex subunit 9 Human genes 0.000 description 8
- 101710152866 CCR4-NOT transcription complex subunit 9 Proteins 0.000 description 8
- 230000005611 electricity Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
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Abstract
The utility model relates to a trial jump used for a residue current operated protective device and belongs to the technical field of power testing equipment. The trial jump device includes a testing coil, a time relay and a current source connected in series with each other. The testing coil is installed in a zero-sequence mutual inductor of the residue current operated protective device. According to the utility model, the testing coil is installed in the zero-sequence mutual inductor of the prior residue current operated protective device. The trial jump device is very simple in integral structure, so that the size can be reduced substantially. Besides, the trial jump device can be driven by a dry cell, so that the weight is reduced substantially. Therefore, the trial jump device is convenient to carry.
Description
Technical field
The utility model relates to a kind of proving installation of RCD, belongs to electrical equipment technical field.
Background technology
At present, RCD (residual current operated protective device) all can be installed in low voltage electric network, referred to as RCD.
Because supply line loop is in the time of normal work, the electric current of its input line is consistent with the size of current of output line, opposite direction.Utilize this point, zero-sequence transformer is enclosed within outside electric wire, magnetic flux is now 0.In the time there are other abnormal conditions such as electric leakage, electric shock, input line is no longer consistent with output line size of current, will in zero-sequence transformer, produce induction current.Subsequent conditioning circuit detects after this induction current, controls corresponding isolating switch and opens circuit, and ensures Electrical Safety.
RCD needs periodic maintenance, test could ensure that it is effective, and most important one of its day-to-day test is trip test.While namely testing the minimum leakage electric current that RCD can detect at it, whether can effectively identify and electricity absolutely.But existing proving installation is bulky, and must be connected with the 220V in power distribution cabinet (JP cabinet).And inevitable charged in power distribution cabinet, so just need power-off when wiring, cause the complicated trouble of wiring process.Make RCD line service efficiency lower.
And existing test is all manually completed by operating personnel by day, can make troubles to user and jump electricity daytime, the complaint of power supply department is increased.
Summary of the invention
The technical problems to be solved in the utility model is, overcomes the shortcoming of prior art, propose a kind of wiring simple, be easy to carry, RCD trial jump device that can fixed time test.
The utility model is that the technical scheme that solves the problems of the technologies described above proposition is: a kind of RCD trial jump device, comprise the RCD that contains zero-sequence transformer, also comprise test coil, electrotimer and the current source of series connection successively; Described test coil curls up the magnetic core ring in described zero-sequence transformer.Such scheme further improves and is: between described test coil and described electrotimer, current source, be connected by quick inserting fitting.
Such scheme further improves and is: between described test coil and described electrotimer, be in series with current-limiting resistance.
Such scheme further improves and is: described current source and described electrotimer are driven by dry cell.
The RCD trial jump device that the utility model provides packs one group of test coil in the zero-sequence transformer of existing RCD, and installation process is simple.Utilize the current source of connecting with this coil to produce simulated failure electric current, trigger RCD and complete test.Electrotimer (is generally 1 front and back at midnight in order to set the test duration, when user is less, reduce the impact of power-off on user) as far as possible, so, without manually on duty, installing and set rear personnel can leave, and after within second day, returning, can learn test result by reading opening circuit of isolating switch with recovery record.The RCD trial jump device one-piece construction providing due to the utility model is very simple, therefore reduced volume significantly, and drive with dry cell, weight also significantly alleviates, and is easy to carry.
Brief description of the drawings
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Fig. 1 is the circuit diagram of a preferred embodiment of the utility model.
Number in the figure is schematically as follows: 1-RCD, 2-zero-sequence transformer, 3-test coil, 4-electrotimer, 5-current source, 6-Quick connector, 7-reometer.
Embodiment
Embodiment
The RCD trial jump device of the present embodiment as shown in Figure 1, comprising: test coil 3, electrotimer 5 and the current source 5 of RCD 1, series connection successively.Between test coil 3 and electrotimer 4, current source 5, be connected by quick inserting fitting 6, test coil 3 can be installed separately like this, convenient and swift.
For the stable and safety that ensures that the trial jump device of the present embodiment moves, on test coil 3, be in series with current-limiting resistance R1, on electrotimer, current source, be in series with current-limiting resistance R2.
In order to make measuring current more directly perceived, current source 5 places are also in series with reometer 7.
The electric weight that need to use due to the trial jump device of the present embodiment is less, only for current source and electrotimer need electric power, therefore uses dry cell to drive.
When work, test coil 3 is wrapped on the magnetic core ring of zero-sequence transformer 2, in fact, the test coil of the present embodiment is the wire of a circle tape insulation skin, is passed the magnetic core ring of zero-sequence transformer 2.Then utilize quick inserting fitting 6, test coil 3 and other parts are coupled together.
The size of current (meeting the minimum trigger current of RCD 1) of setting current source 5 according to the model of RCD 1, the present embodiment is taking ancient cooking vessel board LJM6L-300 as example, and its trigger current is 300ma.Reset 4 start-up times of electrotimer, the present embodiment is taking 01:08:18 as example.So,, completed and installed and set.Operating personnel can leave.
In the time arriving 01:08:18; electrotimer 4 starts; loop is connected; current source 5 provides the electric current of 300ma for test coil 3; RCD 1 detects the electric current in zero-sequence transformer 2; if himself is good working order not, think and break down, by RCD 1 output terminal output signal to isolating switch open circuit cut off power supply.After 1 second, electrotimer 4 is recovered, and test coil 3 electric currents revert to 0, and RCD 1 postpones 1 minute (general utility functions of current used RCD) after leakage current disappears, more again exports new signal and restore electricity.
Second day, operating personnel got back to scene, by reading the break-make record of isolating switch.If isolating switch connects with communication network, also can be in the inquiry of power supply chamber place.If this record conforms to the setting-up time of electrotimer 4, prove that RCD 1 function is intact, if be not inconsistent, illustrate that RCD 1 goes wrong, need maintenance.
The utility model is not limited to the various embodiments described above, and all employings are equal to replaces the technical scheme forming, and all drops on the protection domain of the utility model requirement.
Claims (4)
1. a RCD trial jump device, comprises the RCD that contains zero-sequence transformer, it is characterized in that: the test coil, electrotimer and the current source that also comprise series connection successively; Described test coil curls up the magnetic core ring in described zero-sequence transformer.
2. RCD trial jump device according to claim 1, is characterized in that: between described test coil and described electrotimer, current source, be connected by quick inserting fitting.
3. RCD trial jump device according to claim 1, is characterized in that: between described test coil and described electrotimer, be in series with current-limiting resistance.
4. RCD trial jump device according to claim 1, is characterized in that: described current source and described electrotimer are driven by dry cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420274979.7U CN203909173U (en) | 2014-05-27 | 2014-05-27 | Trial jump device used for residue current operated protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420274979.7U CN203909173U (en) | 2014-05-27 | 2014-05-27 | Trial jump device used for residue current operated protective device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203909173U true CN203909173U (en) | 2014-10-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420274979.7U Expired - Fee Related CN203909173U (en) | 2014-05-27 | 2014-05-27 | Trial jump device used for residue current operated protective device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203909173U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109671591A (en) * | 2018-12-26 | 2019-04-23 | 韦明肯 | A kind of simple high power digital switch of while falling |
-
2014
- 2014-05-27 CN CN201420274979.7U patent/CN203909173U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109671591A (en) * | 2018-12-26 | 2019-04-23 | 韦明肯 | A kind of simple high power digital switch of while falling |
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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: 20141029 Termination date: 20150527 |
|
| EXPY | Termination of patent right or utility model |