CN109917202A - A kind of earth leakage protective device endurance testing device - Google Patents
A kind of earth leakage protective device endurance testing device Download PDFInfo
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- CN109917202A CN109917202A CN201711330904.0A CN201711330904A CN109917202A CN 109917202 A CN109917202 A CN 109917202A CN 201711330904 A CN201711330904 A CN 201711330904A CN 109917202 A CN109917202 A CN 109917202A
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- sequence current
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- control chip
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- machine box
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- 238000012360 testing method Methods 0.000 title claims abstract description 15
- 230000001681 protective effect Effects 0.000 title claims abstract description 11
- 239000000523 sample Substances 0.000 claims abstract description 16
- 241000270722 Crocodylidae Species 0.000 claims abstract description 14
- 238000001514 detection method Methods 0.000 claims abstract description 14
- 238000006243 chemical reaction Methods 0.000 claims abstract description 13
- LNNWVNGFPYWNQE-GMIGKAJZSA-N desomorphine Chemical compound C1C2=CC=C(O)C3=C2[C@]24CCN(C)[C@H]1[C@@H]2CCC[C@@H]4O3 LNNWVNGFPYWNQE-GMIGKAJZSA-N 0.000 claims abstract description 13
- 230000001012 protector Effects 0.000 claims abstract description 9
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 7
- 230000005611 electricity Effects 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 2
- 238000013500 data storage Methods 0.000 description 4
- 238000009413 insulation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention discloses a kind of earth leakage protective device endurance testing devices; including fitting machine box; the outer surface of fitting machine box is inlaid with liquid crystal display and function selection key; integrated circuit board is installed inside fitting machine box; main control chip is welded on integrated circuit board; the data input pin of main control chip is connected with zero-sequence current detection module, and order output terminal is connected with breaker protector and sound and light alarm module；Zero-sequence current detection module includes external probe, external probe input terminal is connected with crocodile clip, crocodile clip clamping connection is in circuit under test, the output end of external probe is connected with zero sequence current mutual inductor, the output end of zero sequence current mutual inductor is connected with linear operational amplifier, and linear operational amplifier is also connected with voltage comparator and analog to digital conversion circuit.The present invention can effectively detect leaky, and sound an alarm while realizing circuit protection in time, reduce safety accident odds.
Description
Technical field
The present invention relates to electric wiring security technology area, specially a kind of earth leakage protective device endurance testing device.
Background technique
High-voltage fence people are not easy to contact, and low voltage electric network covering surface is big, and electrical equipment is more, and the chance that people touches also compares
It is more, since electric wiring makes moist, the overload power utilization of peak times of power consumption, service conductor, lead-out wire insulation ag(e)ing or breakage, rubber
Insulated wire sheath, flexible cable sheath and insulating layer rupture, flexible cable splice insulation binder select it is improper or loosely fall off etc. because
Element can all cause the electric leakage accident of low-voltage supply line to occur, to cause the disasters such as electric shock, fire.
Summary of the invention
In view of the above problems, can effectively detect electric leakage the present invention provides a kind of earth leakage protective device endurance testing device
Phenomenon, and circuit protection is sounded an alarm while realized in time, reduce safety accident odds, can effectively solve background skill
The problems in art.
To achieve the above object, the invention provides the following technical scheme: a kind of earth leakage protective device endurance testing device, including
Fitting machine box, the outer surface of the fitting machine box are inlaid with liquid crystal display and function selection key, installation inside fitting machine box
There is integrated circuit board, main control chip is welded on the integrated circuit board, the data input pin of the main control chip is connected with zero
Sequence current detection module, order output terminal are connected with breaker protector and sound and light alarm module；The zero-sequence current detection module
Including external probe, the external probe is pierced by from the side of fitting machine box, and input terminal is connected with crocodile clip, the crocodile clip folder
It connects in circuit under test, the output end of external probe is connected with zero sequence current mutual inductor, the output of the zero sequence current mutual inductor
End is connected with linear operational amplifier, and the output end of the linear operational amplifier is also connected with voltage comparator and analog-to-digital conversion
Circuit.
As a preferred technical solution of the present invention, the main control chip uses 8051 enhanced series monolithics
STCl5F2K60S2, and main control chip is also connected with battery and data storage.
As a preferred technical solution of the present invention, the sound and light alarm module includes Current amplifier driver, described
The output end of Current amplifier driver is connected with buzzer and flash lamp.
As a preferred technical solution of the present invention, analog-digital conversion circuit as described uses 10 A/D conversion chips
TLC1543, and the communication port for being connected to main control chip of the DATAOUT of chip.
It compared with prior art, the beneficial effects of the present invention are: should be based on the electric wiring leak current fault inspection that signal triggers
Device is surveyed, by the way that zero-sequence current detection module is arranged, external circuit is connected with crocodile clip using external probe, utilizes zero-sequence current
Mutual inductor carries out zero-sequence current detection, carries out current signal processing in conjunction with linear operational amplifier and voltage comparator, recycles
Breaker protector forms closed loop feedback control, effectively realizes down circuitry protection operation；It can by setting buzzer and flash lamp
To realize that light warning operates；The present invention can effectively detect leaky, and sound an alarm while realizing circuit protection in time,
Reduce safety accident odds.
Detailed description of the invention
Fig. 1 is modular structure schematic diagram of the present invention；
Fig. 2 is schematic structural view of the invention；
Fig. 3 is analog to digital conversion circuit schematic diagram.
In figure: 1- fitting machine box；2- liquid crystal display；3- function selection key；4- integrated circuit board；5- main control chip；
6- zero-sequence current detection module；7- breaker protector；8- sound and light alarm module；The external probe of 9-；10- crocodile clip；11- zero sequence electricity
Current transformer；12- linear operational amplifier；13- voltage comparator；14- battery；15- data storage；16- Current amplifier
Driver；17- buzzer；18- flash lamp；19- analog to digital conversion circuit.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Embodiment:
It please refers to Fig.1 to Fig.3, the present invention provides a kind of technical solution: a kind of earth leakage protective device endurance testing device, including
Fitting machine box 1, the outer surface of the fitting machine box 1 are inlaid with liquid crystal display 2 and function selection key 3, inside fitting machine box 1
Integrated circuit board 4 is installed, main control chip 5, the data input pin of the main control chip 5 are welded on the integrated circuit board 4
It is connected with zero-sequence current detection module 6, order output terminal is connected with breaker protector 7 and sound and light alarm module 8；The zero sequence electricity
Flowing detection module 6 includes external probe 9, and the external probe 9 is pierced by from the side of fitting machine box 1, and input terminal is connected with crocodile
Folder 10, for 10 clamping connection of crocodile clip in circuit under test, the output end of external probe 9 is connected with zero sequence current mutual inductor 11, institute
The output end for stating zero sequence current mutual inductor 11 is connected with linear operational amplifier 12, the output end of the linear operational amplifier 12
It is also connected with voltage comparator 13 and analog to digital conversion circuit 19；
The main control chip 5 uses 8051 enhanced series monolithic STCl5F2K60S2, and main control chip 5 is also connected with
There are battery 14 and data storage 15；The sound and light alarm module 8 includes Current amplifier driver 16, and the Current amplifier drives
The output end of dynamic device 16 is connected with buzzer 17 and flash lamp 18；Analog-digital conversion circuit as described 19 converts core using 10 A/D
Piece TLC1543, and the communication port for being connected to main control chip 5 of the DATAOUT of chip.
The working principle of the invention: the fitting machine box 1 is made of insulation shielding material, for protecting internal circuit knot
Structure；The integrated circuit board 4 is used to all circuit structures assembling integral structure, and the function selection key 3 is used for
Corresponding operation mode and running parameter setting are selected, the liquid crystal display 2 can show current operation value, the master control core
Piece 5 carries out data receiver and Data Analysis Services；
For the zero-sequence current detection module 6 for detecting whether there is leaky, the crocodile clip 10 can be convenient folder
It holds in the line node for being fixed on and needing to detect, the external probe 9 is wired to crocodile clip 10, will be on crocodile clip 10
Signal be introduced to zero sequence current mutual inductor 11, when there is leaky to occur, the secondary side of zero sequence current mutual inductor 11 is generated
Corresponding induced current, linear operational amplifier 12 are fed through voltage comparator after the induced current of generation is carried out Linear Amplifer
13 and analog to digital conversion circuit 19, the end in the same direction of the voltage comparator 13 is connected with reference data voltage, carries out pair with input value
Than exporting high level when being less than reference value, 5 decision circuitry of main control chip is normal at this time, exports low electricity when being greater than reference value
Flat, main control chip 5 can then trigger breaker protector 7 and sound and light alarm module 8 immediately, and the triggering breaker protector 7 is by circuit
Power supply at disconnect, the Current amplifier driver 16 will be after output Current amplifier, and driving buzzer 17 issues alarm, simultaneously
Light flash lamp 18；
Collected analog voltage is converted into digital signal by analog-digital conversion circuit as described 19, and is sent into main control chip 5,
The main control chip 5 calls internal processes to handle current data, and stores to data storage 15, while passing through liquid crystal
Display 2 is shown.
The electric wiring leak current fault detection device based on signal triggering, by the way that zero-sequence current detection module 6, benefit is arranged
External circuit is connected with external probe 9 and crocodile clip 10, carries out zero-sequence current detection, bonding wire using zero sequence current mutual inductor 11
Property operational amplifier 12 and voltage comparator 13 carry out current signal processing, recycle breaker protector 7 formed closed loop feedback control
System effectively realizes down circuitry protection operation；Light warning operation may be implemented by setting buzzer 17 and flash lamp 18；This
Invention can effectively detect leaky, and sound an alarm while realizing circuit protection in time, reduce the several of safety accident generation
Rate.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (4)
1. the outer surface of a kind of earth leakage protective device endurance testing device, including fitting machine box (1), the fitting machine box (1) is inlayed
There are liquid crystal display (2) and function selection key (3), integrated circuit board (4) is installed inside fitting machine box (1), feature exists
In: it is welded with main control chip (5) on the integrated circuit board (4), the data input pin of the main control chip (5) is connected with zero sequence
Current detection module (6), order output terminal are connected with breaker protector (7) and sound and light alarm module (8)；The zero-sequence current inspection
Surveying module (6) includes external probe (9), and the external probe (9) is pierced by from the side of fitting machine box (1), and input terminal is connected with
Crocodile clip (10), for crocodile clip (10) clamping connection in circuit under test, it is mutual that the output end of external probe (9) is connected with zero-sequence current
The output end of sensor (11), the zero sequence current mutual inductor (11) is connected with linear operational amplifier (12), the linear operation
The output end of amplifier (12) is also connected with voltage comparator (13) and analog to digital conversion circuit (19).
2. a kind of earth leakage protective device endurance testing device according to claim 1, it is characterised in that: the main control chip
(5) 8051 enhanced series monolithic STCl5F2K60S2 are used, and main control chip (5) is also connected with battery (14) sum number
According to memory (15).
3. a kind of earth leakage protective device endurance testing device according to claim 1, it is characterised in that: the sound-light alarm mould
Block (8) includes Current amplifier driver (16), the output end of the Current amplifier driver (16) be connected with buzzer (17) and
Flash lamp (18).
4. a kind of earth leakage protective device endurance testing device according to claim 1, it is characterised in that: the analog-to-digital conversion electricity
Road (19) uses 10 A/D conversion chip TLC1543, and the communication ends for being connected to main control chip (5) of the DATAOUT of chip
Mouthful.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711330904.0A CN109917202A (en) | 2017-12-13 | 2017-12-13 | A kind of earth leakage protective device endurance testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711330904.0A CN109917202A (en) | 2017-12-13 | 2017-12-13 | A kind of earth leakage protective device endurance testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109917202A true CN109917202A (en) | 2019-06-21 |
Family
ID=66959016
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711330904.0A Pending CN109917202A (en) | 2017-12-13 | 2017-12-13 | A kind of earth leakage protective device endurance testing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109917202A (en) |
-
2017
- 2017-12-13 CN CN201711330904.0A patent/CN109917202A/en active Pending
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190621 |
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| WD01 | Invention patent application deemed withdrawn after publication |