CN204044320U - Apparatus for inspecting arc fault circuit breaker - Google Patents
Apparatus for inspecting arc fault circuit breaker Download PDFInfo
- Publication number
- CN204044320U CN204044320U CN201420363440.9U CN201420363440U CN204044320U CN 204044320 U CN204044320 U CN 204044320U CN 201420363440 U CN201420363440 U CN 201420363440U CN 204044320 U CN204044320 U CN 204044320U
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- Prior art keywords
- relay
- arc
- fault circuit
- circuit interrupter
- electrically connected
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- 238000007689 inspection Methods 0.000 claims description 27
- 238000010891 electric arc Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 10
- 238000012360 testing method Methods 0.000 description 9
- 238000003763 carbonization Methods 0.000 description 6
- 229920000915 polyvinyl chloride Polymers 0.000 description 3
- 239000004800 polyvinyl chloride Substances 0.000 description 3
- 229920000742 Cotton Polymers 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The utility model provides a device for inspecting an arc fault circuit breaker, which comprises a transformer, a relay, a power line notch, a load and an MCU; the number of the relays is 5, and the relays are respectively a first relay, a second relay, a third relay, a fourth relay and a fifth relay; the first relay, the transformer, the power line notch, the load and the second relay are electrically connected in sequence, and the first relay and the second relay are electrically connected with the arc fault circuit breaker to form a first passage; the power line notch, the load and the fourth relay are sequentially and electrically connected, the third relay and the fourth relay are electrically connected with the arc fault circuit breaker, and the fifth relay is electrically connected with the power line notch and the load and then grounded to form a second path; and the 5 relays are respectively electrically connected with the MCU. The utility model discloses a device can inspect arc fault circuit breaker's reliability, and circuit structure is simple and the cost is lower.
Description
Technical field
The utility model relates to arc-fault circuit interrupter apparatus field, particularly relates to the device of inspection arc-fault circuit interrupter.
Background technology
AFCI (Arc-Fault Circuit-Interrupter, arc-fault circuit interrupter) is a up-to-date electric circuit protection equipment, and its Main Function is the fire preventing electric arc from causing.The electric arc of these danger may occur in the wiring of household electrical appliance, on the wire harness of plugs and sockets tie point and household electrical appliance inside or the power lead of electrical equipment.Therefore, whether AFCI can disconnect in time when above-mentioned arc phenomenon appears in household electrical appliance etc. and seem particularly important.The device to test circuit structure of traditional inspection AFCI reliability is complicated, and cost is higher.
Utility model content
For device circuit complex structure, the problem that cost is higher of traditional inspection AFCI reliability, the utility model provides the device of the inspection arc-fault circuit interrupter that a kind of checking circuit structure is simple, cost is low.
For reaching technical purpose, the utility model embodiment adopts following technical scheme:
The utility model provides a kind of device checking arc-fault circuit interrupter, for being electrically connected with arc-fault circuit interrupter, checking described arc-fault circuit interrupter, comprising transformer, relay, power lead otch, load and MCU;
The quantity of described relay is 5, is respectively the first relay, the second relay, the 3rd relay, the 4th relay and the 5th relay;
Described first relay, described transformer, described power lead otch, described load and described second relay are electrically connected successively, and described first relay and described second relay are electrically connected with described arc-fault circuit interrupter, form the first path;
Described 3rd relay, described power lead otch, described load and described 4th relay are electrically connected successively, and described 3rd relay and described 4th relay are electrically connected with described arc-fault circuit interrupter, ground connection after described 5th relay is electrically connected with described power lead otch and described load, forms alternate path;
5 described relays are electrically connected with described MCU respectively.
As a kind of embodiment, also comprise the charactron of display arc-fault circuit interrupter trip time;
Described charactron is electrically connected with described MCU.
As a kind of embodiment, described MCU comprises the first timer, the second timer and the 3rd timer;
Described first timer, for the timing very first time;
Described second timer, for timing second time;
Described 3rd timer, for the delay time of relay described in timing.
As a kind of embodiment, also comprise the 4th timer, for the proving time of device described in timing.
As a kind of embodiment, described load is variable rheostat.
As a kind of embodiment, 5 described relays are identical.
The beneficial effects of the utility model:
The device of inspection arc-fault circuit interrupter of the present utility model, by the first relay, transformer, power lead otch, load and the second relay are electrically connected successively, and the first relay and the second relay are electrically connected with arc-fault circuit interrupter, form the first path, for power lead otch provides high pressure, by the 3rd relay, power lead otch, load and the 4th relay are electrically connected successively, and the 3rd relay and the 4th relay are electrically connected with arc-fault circuit interrupter, ground connection after 5th relay is electrically connected with power lead otch and load, form alternate path, for power lead otch provides line voltage, pass through high pressure carbonization, low pressure conducting, power lead otch is made to produce carbonized path, thus generation electric arc, whether inspection arc-fault circuit interrupter can disconnect when electric arc occurs in time, thus conclude the reliability of arc-fault circuit interrupter.This device compares conventional art, and circuit structure is simple and cost is lower.
Accompanying drawing explanation
Fig. 1 is the structural representation of an embodiment of the device of inspection arc-fault circuit interrupter of the present utility model;
Fig. 2 is the schematic flow sheet of an embodiment of the method for inspection of the device of inspection arc-fault circuit interrupter of the present utility model;
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, be further elaborated below in conjunction with the device of drawings and Examples to the utility model inspection arc-fault circuit interrupter.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
Shown in Figure 1, the utility model embodiment provides a kind of device checking arc-fault circuit interrupter, for being electrically connected with arc-fault circuit interrupter, check described arc-fault circuit interrupter, comprise transformer 7, relay, power lead otch 8, load 9 and MCU (Micro Control Unit, micro-control unit or microcomputer) 10; The quantity of relay is 5, is respectively the first relay 1, second relay 2, the 3rd relay 3, the 4th relay 4 and the 5th relay 5; First relay 1, transformer 7, power lead otch 8, load 9 and the second relay 2 are electrically connected successively, and the first relay 1 and the second relay 2 are electrically connected with arc-fault circuit interrupter 6, form the first path; 3rd relay 3, power lead otch 8, load 9 and the 4th relay 4 are electrically connected successively, and the 3rd relay 3 and the 4th relay 4 are electrically connected with arc-fault circuit interrupter 6, ground connection after the 5th relay 5 is electrically connected with power lead otch 8 and load, forms alternate path; 5 relays are electrically connected with MCU10 respectively.
It should be noted that herein, power lead live wire cuts and is formed by power lead otch 8, with two-layer electric black PVC (PolyVinyl Chloride, Polyvinylchloride) band parcel on power lead otch 8, then wrap in outside with layer glass fabric strip, for providing insulation, prevent heat from distributing simultaneously, more easily form carbonized path, then wrap Medical cotton on its surface, when power lead otch produces electric arc, Medical cotton is caught fire.
The device of inspection arc-fault circuit interrupter of the present utility model, first closed first relay 1 and the second relay 2, by live wire, first relay 1, transformer 7, power lead otch 8, load 9 and the second relay 2 are electrically connected successively, the line and arc-fault circuit interrupter 6 is started to exchange fire after being electrically connected with the first relay 1, arc-fault circuit interrupter 6 is electrically connected rear connecting to neutral line with the second relay 2, be electrically connected by transformer 7 between second relay 2 and load 9, the high pressure (15KV) that the first path formed produces is applied between the L-N (live wire-zero line) of power lead and L-G (live wire-ground wire), the output current of the 30mA that transformer is produced flows through power lead otch 8, power lead otch 8 is made to occur carbonization, then the first relay 1 and the second relay 2 is disconnected, closed 3rd relay 3, the 4th relay 4 and the 5th relay 5, by live wire, the 3rd relay 3, power lead otch 8, load 9, the 4th relay 4 are electrically connected successively, the line and arc-fault circuit interrupter 6 is started to exchange fire after being electrically connected with the 3rd relay 3, arc-fault circuit interrupter 6 is electrically connected rear connecting to neutral line with the 4th relay 4,5th relay 5 is by power lead otch 8 and load 9 ground connection, the line voltage (220V) that the alternate path formed produces is applied between L-N, makes power lead normally.Power lead otch 8 and load 9, by the 5th relay 5 ground connection, are avoided because of its electrical shock safety accident brought of leaking electricity.Wherein, first relay 1, second relay 2, the 3rd relay 3, the 4th relay 4 and the 5th relay 5 all with MCU (Micro Control Unit, micro-control unit or microcomputer) 10 electrical connections, detect its state in real time by MCU and control its state.The device of inspection arc-fault circuit interrupter of the present utility model makes the carbonization of power lead otch by high pressure, low pressure makes power lead conducting, and then produces series connection (or in parallel) electric arc, checks the reliability of AFCI, compare conventional art, its circuit structure is simple and cost is lower.
As a kind of embodiment, also comprise the charactron 11 of display arc-fault circuit interrupter 6 trip time; Charactron 11 is electrically connected with MCU10.
High pressure carbonization, low pressure conducting, power lead otch 8 place is made to produce carbonized path, thus produce series connection (or in parallel) electric arc, when an electrical arc occurs, if arc-fault circuit interrupter 6 disconnects in time, then MCU calculates T trip time that AFCI disconnects the moment, and trip time, T calculated according to formula T=Z (10+0.02)+0.001X, wherein X represents the first timer frequency of reckoning by time, and Z represents the second timer frequency of reckoning by time; Calculate and shown by charactron 11 after T trip time.
As a kind of embodiment, MCU comprises the first timer, the second timer and the 3rd timer; First timer, for the timing very first time; Second timer, for timing second time; 3rd timer, for the delay time of time switch.
Very first time during the first timer, the very first time is set as 1ms, for detecting the time of electric arc sustainable existence; Second time during the second timer, the second time was set as 10s, flowed through the time of power lead otch for controlling high pressure or normal pressure electric current; The delay time of the 3rd timer time switch, this delay time is set as 20ms, avoids the delay time because of relay to cause relay closes or disconnects inconsistent, affecting the test of whole device.
As a kind of embodiment, also comprise the 4th timer, for the proving time of time set.
4th timer can be arranged in MCU, controlled by MCU, also can be independently timer, as stopwatch, the time of the 4th timer sets is 5min, does not disconnect, when reaching 5min during the 4th timer in arc-fault circuit interrupter 6 is in proving time (5min), MCU control device stops test, ensures that circuit arrangement is not damaged.
As a kind of embodiment, load 9 is variable rheostat.
Load 9 is variable rheostat, by regulating variable rheostat, can change output current, testing the power lead of different wire diameter.And employing variable rheostat, when not dismounting load, the size of adjustable load, avoids the inconvenience that dismounting brings.
As a kind of embodiment, 5 relays are identical.
5 relays are identical, can be common contactor, and make the circuit structure of the device checking arc-fault circuit interrupter simple, cost is lower.
In order to be illustrated more clearly in device of the present utility model, the method for inspection below in conjunction with device carrys out detailed description, shown in Figure 2, and the method for inspection of the device of inspection stoppage circuit breaker of the present utility model, comprises the following steps:
S100, MCU control the first relay and the second relay closes, apply high pressure by transformer to power lead otch.
S200, after applying high pressure second time, disconnects described first relay and described second relay;
S300, after delay time, MCU controls the 3rd relay, the 4th relay and the 5th relay closes, provides line voltage, power lead otch described in conducting, provide the time of line voltage to be the second time to load.
S400, when described power lead otch produces carbonized path, whether inspection arc-fault circuit interrupter disconnects in time.
The method of inspection of the device of inspection arc-fault circuit interrupter of the present utility model, MCU10 controls the first relay 1 and the second relay 2 closes, and then closed first path, first path provides high pressure (15KV) for power lead, the high-tension current of generation is made to flow through power lead otch 8, it is made to produce carbonization, after the first path applies high pressure second time to power lead, disconnect the first relay 1 and the second relay 2, during the 3rd timer after delay time, MCU controls the 3rd relay 3, 4th relay 4 and the 5th relay 5 close, alternate path closes, for power lead provides civil power normal pressure (220V), make power lead conducting, pass through normal current, if now create carbonized path, namely there is series connection (or in parallel) electric arc, judge whether AFCI disconnects in time, thus the reliability of inspection AFCI, if now there is carbonized path not yet, namely AFCI does not disconnect, then when the second timer after the second time, disconnect the 3rd relay 3, the 4th relay 4 and the 5th relay 5, when the 3rd timer after delay time, closed first relay 1 and the second relay, repeats above-mentioned steps until power lead otch 8 carbonization produces electric arc.In the process, once, the frequency of reckoning by time of the second timer adds 1 to the every timing of the second timer.Adopt the reliability of the method inspection arc-fault circuit interrupter, easy to operate, step is simple, and the verifying attachment circuit structure provided for the method is simple, and cost is lower.
As a kind of embodiment, MCU10 controls the first relay 1 and the second relay 2 closes, and gives before power lead otch 8 applies high pressure, comprise the following steps by transformer 7:
S010, switches on power.
S020, detects the state of described 3rd relay, described 4th relay and described 5th relay;
If the 3rd relay, the 4th relay and the 5th relay are off state, then closed first relay and the second relay;
Otherwise, disconnect the 3rd relay, the 4th relay and the 5th relay, after described delay time, continue to detect its state.
Switch on power, for circuit is powered, first MCU10 detects the state of the 3rd relay 3, the 4th relay 4 and the 5th relay 5, judge whether they belong to off-state, if so, then can carry out step S100, otherwise, disconnect the 3rd relay 3, the 4th relay 4 and the 5th relay 5, when the 3rd timer after delay time, return step S020.
As a kind of embodiment, when power lead otch 8 produces carbonized path, whether inspection arc-fault circuit interrupter 6 disconnects in time, comprises the steps:
Judge whether arc-fault circuit interrupter 6 disconnects;
S410, if so, acquisition counter controling parameters, calculate the trip time of arc-fault circuit interrupter;
Whether S420, if not, reached for the second time when judging the second timer, reaches after the second time again after delay time, closed first relay 1 and the second relay 2.
When arc-fault circuit interrupter disconnects, indicate that electric arc produces, MCU gathers the frequency of reckoning by time X of the first timer, and according to the frequency of reckoning by time Z of the second timer, the frequency of reckoning by time of the 3rd timer is once more than the frequency of reckoning by time of the second timer, therefore by same tally control parameter, parametric variable can be reduced.Calculate when AFCI disconnects trip time used, trip time, T=Z (10+0.02)+0.001X, and was shown by charactron 11; When arc-fault circuit interrupter does not disconnect, repeat step S100 to S300, if when disconnecting not yet in the 4th timer timing time, MCU control test process stops, and prevent test period long, electrical equipment is damaged.
As a kind of embodiment, further comprising the steps of:
When described arc-fault circuit interrupter reach still do not disconnect proving time time, control test process stop.
The proving time of the 4th timer timer, in this embodiment, proving time is 5min, and it can be arranged in MCU, is controlled by MCU, also can be independently timer, as stopwatch.If when arc-fault circuit interrupter 6 disconnects not yet in the 4th timer timing time, MCU control test process stops, and prevent test period long, electrical equipment is damaged.
The above embodiment only have expressed several embodiment of the present utility model, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be as the criterion with claims.
Claims (6)
1. check a device for arc-fault circuit interrupter, for being electrically connected with arc-fault circuit interrupter, checking described arc-fault circuit interrupter, it is characterized in that, comprising transformer, relay, power lead otch, load and MCU;
The quantity of described relay is 5, is respectively the first relay, the second relay, the 3rd relay, the 4th relay and the 5th relay;
Described first relay, described transformer, described power lead otch, described load and described second relay are electrically connected successively, and described first relay and described second relay are electrically connected with described arc-fault circuit interrupter, form the first path;
Described 3rd relay, described power lead otch, described load and described 4th relay are electrically connected successively, and described 3rd relay and described 4th relay are electrically connected with described arc-fault circuit interrupter, ground connection after described 5th relay is electrically connected with described power lead otch and described load, forms alternate path;
5 described relays are electrically connected with described MCU respectively.
2. the device of inspection arc-fault circuit interrupter according to claim 1, is characterized in that, also comprises the charactron of display arc-fault circuit interrupter trip time;
Described charactron is electrically connected with described MCU.
3. the device of inspection arc-fault circuit interrupter according to claim 1, is characterized in that:
Described MCU comprises the first timer, the second timer and the 3rd timer;
Described first timer, for the timing very first time;
Described second timer, for timing second time;
Described 3rd timer, for the delay time of relay described in timing.
4. the device of inspection arc-fault circuit interrupter according to claim 3, is characterized in that, also comprises the 4th timer, for the proving time of device described in timing.
5. the device of the inspection arc-fault circuit interrupter according to any one of Claims 1-4, is characterized in that, described load is variable rheostat.
6. the device of inspection arc-fault circuit interrupter according to claim 5, is characterized in that, 5 described relays are identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420363440.9U CN204044320U (en) | 2014-07-02 | 2014-07-02 | Apparatus for inspecting arc fault circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420363440.9U CN204044320U (en) | 2014-07-02 | 2014-07-02 | Apparatus for inspecting arc fault circuit breaker |
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| Publication Number | Publication Date |
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| CN204044320U true CN204044320U (en) | 2014-12-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420363440.9U Expired - Fee Related CN204044320U (en) | 2014-07-02 | 2014-07-02 | Apparatus for inspecting arc fault circuit breaker |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104090231A (en) * | 2014-07-02 | 2014-10-08 | 珠海格力电器股份有限公司 | Apparatus and method for inspecting arc fault circuit interrupter |
| CN106707145A (en) * | 2015-11-12 | 2017-05-24 | 上海电科电器科技有限公司 | Arc fault detection device test device and test method |
| CN107290661A (en) * | 2017-08-21 | 2017-10-24 | 优利德科技(中国)有限公司 | A kind of arc fault breaker detection means and its detection method |
-
2014
- 2014-07-02 CN CN201420363440.9U patent/CN204044320U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104090231A (en) * | 2014-07-02 | 2014-10-08 | 珠海格力电器股份有限公司 | Apparatus and method for inspecting arc fault circuit interrupter |
| CN106707145A (en) * | 2015-11-12 | 2017-05-24 | 上海电科电器科技有限公司 | Arc fault detection device test device and test method |
| CN106707145B (en) * | 2015-11-12 | 2019-12-27 | 上海电科电器科技有限公司 | Testing device and testing method of arc fault detection device |
| CN107290661A (en) * | 2017-08-21 | 2017-10-24 | 优利德科技(中国)有限公司 | A kind of arc fault breaker detection means and its detection method |
| CN107290661B (en) * | 2017-08-21 | 2019-08-06 | 优利德科技(中国)股份有限公司 | A kind of arc fault breaker detection device and its detection method |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141224 Termination date: 20210702 |