CN203909174U - Testing device used for residue current operated protective device - Google Patents
Testing device used for residue current operated protective device Download PDFInfo
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- CN203909174U CN203909174U CN201420274996.0U CN201420274996U CN203909174U CN 203909174 U CN203909174 U CN 203909174U CN 201420274996 U CN201420274996 U CN 201420274996U CN 203909174 U CN203909174 U CN 203909174U
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- relay
- timer
- rcd
- current source
- testing
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- 238000012360 testing method Methods 0.000 title claims abstract description 42
- 230000001681 protective effect Effects 0.000 title abstract description 5
- 238000009434 installation Methods 0.000 claims description 13
- 102100032982 CCR4-NOT transcription complex subunit 9 Human genes 0.000 description 11
- 101710152866 CCR4-NOT transcription complex subunit 9 Proteins 0.000 description 11
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 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
- 238000002474 experimental method 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
- 238000012423 maintenance 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
- 230000001960 triggered effect Effects 0.000 description 1
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Abstract
The utility model relates to a testing device used for a residue current operated protective device and belongs to the technical field of power testing equipment. The testing device includes a testing coil and a current source connected in series with each other, and a timer and a relay connected with each other in series. The testing coil is installed in a zero-sequence mutual inductor of the residue current operated protective device. The relay is controlled by output signals of the residue current operated protective device. A normally-opened contact of the relay is connected with one end of the timer. A common end of the relay is connected with the other end of the timer. The on-off states of a loop composed of the testing coil and the current source and a loop composed of the relay and the timer are controlled by a double-pole switch at the same time. According to the utility model, the testing device is very simple in integral structure, so that the size can be reduced substantially. Besides, the testing device can be driven by a dry cell, so that the weight is reduced substantially. Therefore, the testing device is convenient to carry.
Description
Technical field
The utility model relates to a kind of external proving installation of RCD, belongs to power test 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.
Supply line loop is when normal work, and 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.When 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.The principle of work of Here it is RCD.
RCD needs periodic maintenance, test could ensure that it is effective, and 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 during wiring, cause the complicated trouble of wiring process.Make RCD line service efficiency lower.
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 circumscribed, simple, the portable RCD proving installation of wiring.
The utility model is that the technical scheme that solves the problems of the technologies described above proposition is: comprise the RCD that contains zero-sequence transformer, also comprise timer and the relay of the test coil of series connection and current source, series connection; Described test coil curls up the magnetic core ring in described zero-sequence transformer; The output signal of described RCD connects the controlled end of described relay; The normally opened contact of described relay is connected with one end of described timer, and the common port of described relay is connected with the other end of described timer; Break-make is controlled through same double-break switch in the loop that the loop that described test coil, current source form and described relay, timer form.
Such scheme further improves and is: between described test coil and described current source, by the first quick inserting fitting, be connected; Between described relay and described timer, by the second quick inserting fitting, be connected.
Such scheme further improves and is: between described test coil and described current source, be in series with current-limiting resistance.
Such scheme further improves and is: described current source, described relay and described timer are driven by dry cell.
The RCD proving installation 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 current source connect with this coil to produce simulated failure generation current, when double-break switch is closed, energising in test coil, the beginning timing that is also triggered of while timer, zero-sequence transformer triggering RCD; Then, by the output terminal of RCD in order to drive the signal of isolating switch to take out, utilize this signal to drive relay adhesive, after relay adhesive, triggering timing device stops timing, completes once test.The RCD proving installation 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.
Accompanying drawing explanation
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-timer, 5-current source, 6-Quick connector, 7-reometer, 8-double-break switch, 9-relay.
Embodiment
Embodiment
The RCD proving installation of the present embodiment as shown in Figure 1, comprising: timer 4 and the relay 9 of the test coil 3 of RCD 1, series connection and current source 5, series connection; Test coil 3 windings on the magnetic core ring of the zero-sequence transformer 2 of RCD 1, test coil 3 and the end to end formation of current source 5 loop; Relay 9 is controlled by the output signal of RCD 1; The normally opened contact of relay 9 is connected with one end of timer 4, and the common port of relay 9 is connected with the other end of timer 4, thereby forms a loop; Its break-make is controlled in the loop that the loop that test coil 3, current source 5 form and relay 9, timer form by a double-break switch 8 time.
Between test coil 3 and current source 5, by quick inserting fitting 6, be connected; Between relay 9 and timer 4, also by this quick inserting fitting 6, be connected, therefore, this quick inserting fitting 6 is at least 4pin.Like this, at the good test coil 3 of winding and after installing relay 9, can conveniently it be connected in other parts, it is more convenient to make to install.
In order to guarantee the stable and safety of the proving installation operation of the present embodiment, on test coil 3, be in series with current-limiting resistance.
For convenience of reading, current source 5 reometer 7 of also connecting.
The electric weight that need to use due to the proving installation of the present embodiment is less, only for current source 5, relay 9 and timer 4 need electric power, therefore uses dry cell to drive.
During work, test coil 3 is put into zero-sequence transformer 2, in fact, the test coil 3 of the present embodiment is the wire of a circle tape insulation skin, is passed the magnetic core ring of zero-sequence transformer 2.Relay 9 is then installed; from the output terminal of RCD 1, get desired signal; the control end that is connected to relay 9 coils after utilizing amplifying circuit that signal is amplified, then utilizes quick inserting fitting 6, and test coil 3, relay 9 are coupled together with other parts.
According to the model of RCD 1, set the size of current (also i.e. the desired current value of this RCD 1 Standard test programme) of current source 5.It is example that the present embodiment be take ancient cooking vessel board LJM6L-200 type RCD, and its test should be 3 times, and measuring current value should be 200ma, 400ma and 500ma.
Closing Switch 8 starts test experiments; switch 8 is connected test coil 3 and timer 4 simultaneously; current trigger RCD 1 in test coil 3; 1 of RCD outputs signal to isolating switch to cut off power supply; 9, relay is got this signal as control signal; thereby by extremely normally closed electric shock of the common port adhesive of relay 9; and this action can make timer 4 stop timing, the time that show on timer 4 this time is electric leakage action and the break of RCD 1 namely.Cut-off switch 8 after record, leakage current disappears, RCD 1 meeting automatic recovery of power supply after 1 minute.
Like this, the size of current of current source 5 is set according to the testing standard of RCD 1, can simulates different leakage current situations, the time of then recording timer 4, just can obtain the performance index of RCD 1.
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 proving installation, comprises the RCD that contains zero-sequence transformer, it is characterized in that: the timer and the relay that also comprise the test coil of series connection and current source, series connection; Described test coil curls up the magnetic core ring in described zero-sequence transformer; The output signal of described RCD connects the controlled end of described relay; The normally opened contact of described relay is connected with one end of described timer, and the common port of described relay is connected with the other end of described timer; Break-make is controlled through same double-break switch in the loop that the loop that described test coil, current source form and described relay, timer form.
2. RCD proving installation according to claim 1, is characterized in that: between described test coil and described current source, by the first quick inserting fitting, be connected; Between described relay and described timer, by the second quick inserting fitting, be connected.
3. RCD proving installation according to claim 1, is characterized in that: between described test coil and described current source, be in series with current-limiting resistance.
4. RCD proving installation according to claim 1, is characterized in that: described current source, described relay and described timer are driven by dry cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420274996.0U CN203909174U (en) | 2014-05-27 | 2014-05-27 | Testing device used for residue current operated protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420274996.0U CN203909174U (en) | 2014-05-27 | 2014-05-27 | Testing device used for residue current operated protective device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203909174U true CN203909174U (en) | 2014-10-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420274996.0U Expired - Lifetime CN203909174U (en) | 2014-05-27 | 2014-05-27 | Testing device used for residue current operated protective device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203909174U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104459526A (en) * | 2014-11-27 | 2015-03-25 | 苏州上电科电气设备有限公司 | B-type residual current protecting circuit breaker testing device |
| CN104880666A (en) * | 2015-05-13 | 2015-09-02 | 国家电网公司 | Remote testing device of automatic grounding operation |
| CN106168650A (en) * | 2016-08-30 | 2016-11-30 | 中山市开普电器有限公司 | A kind of specified residue connects breaking capacity test device |
-
2014
- 2014-05-27 CN CN201420274996.0U patent/CN203909174U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104459526A (en) * | 2014-11-27 | 2015-03-25 | 苏州上电科电气设备有限公司 | B-type residual current protecting circuit breaker testing device |
| CN104880666A (en) * | 2015-05-13 | 2015-09-02 | 国家电网公司 | Remote testing device of automatic grounding operation |
| CN104880666B (en) * | 2015-05-13 | 2017-11-17 | 国家电网公司 | A kind of remote auto landing operation experimental rig |
| CN106168650A (en) * | 2016-08-30 | 2016-11-30 | 中山市开普电器有限公司 | A kind of specified residue connects breaking capacity test device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141029 |