CN110112043B - Safety leakage protection switch - Google Patents
Safety leakage protection switch Download PDFInfo
- Publication number
- CN110112043B CN110112043B CN201910465717.6A CN201910465717A CN110112043B CN 110112043 B CN110112043 B CN 110112043B CN 201910465717 A CN201910465717 A CN 201910465717A CN 110112043 B CN110112043 B CN 110112043B
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- test
- state
- timer
- protection switch
- leakage protection
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- 238000012360 testing method Methods 0.000 claims abstract description 107
- 239000003990 capacitor Substances 0.000 claims description 7
- 230000002159 abnormal effect Effects 0.000 abstract description 6
- 230000006870 function Effects 0.000 description 29
- 230000008034 disappearance Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000011990 functional testing Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
- H01H83/02—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by earth fault currents
- H01H83/04—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by earth fault currents with testing means for indicating the ability of the switch or relay to function properly
Abstract
The invention discloses a safe leakage protection switch, which comprises a shell and a circuit board, wherein an automatic leakage test loop is arranged on the circuit board, a test button, a test failure indicator lamp, a test normal indicator lamp and a tripping time prompt information screen are arranged on a panel of the shell, an in-out wire connecting terminal and a base fixing hole are correspondingly arranged on the upper side and the lower side of the shell, a logic function control unit is also arranged on the circuit board, and comprises a panel display module, a bistable circuit, a logic voice module, a power module, an I-state test timer, an I-state tripping timer and an II-state timer, and the state of the bistable circuit is switched by adopting a switch with auxiliary contacts. The invention has the advantages that the management function of the leakage test is added on the basis of the common leakage protection switch, the use is convenient, the safety performance is higher, the self-contained management function is realized, the use can be automatically refused when the test is abnormal, the safety of personnel and property can be effectively protected, and the invention has obvious economic value and social value.
Description
Technical Field
The invention relates to the technical field of leakage protection, in particular to a safety type leakage protection switch.
Background
The leakage is current leakage caused by insulation damage or other reasons, and when the leakage is caused, safety accidents such as personal electric shock, fire disaster and explosion can be caused, so that in order to prevent damage caused by the leakage, a leakage protection switch is often connected into a main circuit loop of a circuit, and the leakage protection switch can quickly disconnect the main circuit loop when the leakage or the insulation damage occurs in the main circuit loop, so that a large protection effect is played for personal and property safety, general importance is paid to people, and the current leakage protection switch is widely applied to all industrial fields.
The existing leakage protection switch has some management loopholes and potential safety hazards in the use process, firstly, due to the factors of human management, the function test of the leakage protection switch on time is difficult to ensure, or the function test is carried out, but sometimes the test result is abnormal and the leakage protection switch still continues to be used; in the industrial site overhaul temporary power supply management, although a periodical test record book exists, only an spot check mode is adopted, even more, only a record is adopted, and no actual test exists, if the leakage protection switch is used for a long time and is not subjected to functional test, the leakage protection switch is likely to fail to trip when the circuit leaks due to mechanical jamming or circuit faults, the protection function of the leakage protection switch is lost, and a certain invisible threat is caused to personal and property safety of a user. Therefore, the safety type leakage protection switch which is convenient to use, higher in safety performance, and capable of automatically rejecting use due to abnormal testing is researched and developed, and is objectively required.
Disclosure of Invention
The invention aims to provide the safe type leakage protection switch which is convenient to use, higher in safety performance, and capable of automatically rejecting use when being tested abnormally and has a management function.
The invention aims at realizing the purposes, and the circuit board comprises a shell and a circuit board, wherein an electric leakage automatic test loop is arranged on the circuit board, a test button, a test failure indicator lamp, a test normal indicator lamp and a tripping time prompt information screen are arranged on a panel of the shell, an in-out wire connecting terminal and a base fixing hole are correspondingly arranged on the upper side and the lower side of the shell, and a logic function control unit is also arranged on the circuit board.
The logic function control unit comprises a panel display module, a bistable circuit, a logic voice module, a power module, an I-state test timer, an I-state trip timer and an II-state timer, wherein the input end of the power module is connected with the outlet side of the outlet of the leakage protection switch, namely the outlet side of the leakage automatic test circuit, and the output end of the power module is respectively connected with the panel display module, the bistable circuit, the logic voice module, the I-state test timer, the I-state trip timer and the II-state timer through control buses.
The panel display module is connected with the test failure indicator lamp and the test normal indicator lamp respectively through wires, the input end of the bistable circuit is connected with the auxiliary contact of the switch, the output end of the bistable circuit is connected with the I state test timer and the II state timer respectively through a control bus, the output end of the I state test timer is connected with the I state trip timer through wires, the output end of the I state trip timer is connected with the electric leakage tripping circuit, the output end of the II state timer is connected with the electric leakage tripping circuit, and the output end of the I state test timer is connected with the test button on the electric leakage testing circuit in the logic function circuit in parallel.
Further, the time of the I state test timer is 0.3-0.7 seconds.
Further, the time of the I state tripping timer is 0.3-0.7 seconds. Further, the timing time of the II-state timer is 14-18 hours.
Further, the capacitor holding time of the power supply module is 8-12 seconds.
Further, the voice prompt sent by the logic language module is "test normal", please reclose "or" test failed ", and the use is forbidden.
The invention has the advantages that the logic function control unit is added on the basis of the common leakage protection switch, the logic function control unit is used for forcedly realizing the effective management function, so that the leakage protection switch has the function of automatic detection, the leakage detection circuit and the tripping mechanism are automatically detected to be normal or not when the leakage protection switch is electrified or not, whether the leakage protection switch is successfully tripped or not is judged according to whether alternating current disappears or not, if the tripping is successful, the leakage protection switch can be normally used after reclosing, if the tripping is unsuccessful, the leakage detection circuit is possibly failed, the leakage protection switch can be ensured to be not closed, and also the tripping is possibly failed, a voice prompt of test failure is sent, the leakage protection switch is automatically refused to be used, and in such a way, the problem of the leakage protection switch on management is solved, and the electricity utilization safety is ensured. The invention has the advantages of convenient use, higher safety performance, self-contained management function, automatic refusal of use when abnormal test occurs, effective protection of personnel and property safety, and obvious economic and social values.
Drawings
Fig. 1 is a schematic view of a panel structure of a housing 1 of the present invention;
FIG. 2 is a schematic diagram of a circuit board according to the present invention;
in the figure: the device comprises a 1-shell, a 2-base fixing hole, a 3-test button, a 4-test failure indicator lamp, a 5-test normal indicator lamp, a 6-wire inlet and outlet connecting terminal, a 7-trip time prompt information screen, an 8-logic function control unit, a 9-panel display module, a 10-bistable circuit, an 11-control bus, a 12-power supply module, a 13-logic voice module, a 14-II state timer, a 15-I state trip timer, a 16-I state test timer and a 17-switch auxiliary contact.
Detailed Description
The invention is further described below with reference to the accompanying drawings, without limiting the invention in any way, and any alterations or modifications based on the teachings of the invention are within the scope of the invention.
As shown in fig. 1-2, the invention comprises a shell 1 and a circuit board, wherein a logic function loop with leakage testing and tripping functions, namely an automatic leakage testing loop, is arranged on the circuit board, a testing button 3, a testing failure indicator lamp 4, a testing normal indicator lamp 5 and tripping time prompt information 7 are arranged on a panel of the shell 1, a wire inlet and outlet wiring terminal 6 and a base fixing hole 2 are correspondingly arranged on the upper side and the lower side of the shell 1, and a logic function control unit 8 is also arranged on the circuit board.
The panel display module 9 is connected with the test failure indicator lamp 4 and the test normal indicator lamp 5 respectively through the wire, the input end of the bistable circuit 10 is connected with the switch auxiliary contact 17, the output end is connected with the I state test timer 16 and the II state timer 14 respectively through the wire, the output end of the I state test timer 16 is connected with the I state trip timer 15 through the wire, the output end of the I state trip timer 15 is connected with the electric leakage tripping loop, the output end of the II state timer 14 is connected with the electric leakage tripping loop, and the I state test timer 16 is connected with the test button 3 on the electric leakage automatic test loop in parallel.
The logic function control unit 8 comprises a power supply module 12, wherein the power supply module 12 provides power for the panel display module 9, the logic voice module 13, the bistable circuit 10, the I state test timer 16, the I state trip timer 15, the II state timer 14 and the like through the control bus 11, and provides a criterion signal of 'AC disappearance' trip for the logic voice module 13.
The logic function control unit 8 includes a panel display module 9, and the panel display module 9 obtains an operating power from a power supply module 12 through a control bus 11 and outputs to the test failure indicator lamp 4 and the test normal indicator lamp 5 on the panel of the housing 1.
The logic function control unit 8 comprises a bistable circuit 10, the bistable circuit 10 obtains working power from a power module 12 through a control bus 11, an abnormal signal is provided through a switch auxiliary contact 17, the output is connected to an I state test timer 16 and a II state timer 14, the bistable circuit 10 works in the I state, the I state test timer 16 is connected, the II state timer 14 is connected when the bistable circuit works in the II state, and the II state timer 14 starts to count when the power module 12 'AC disappearance' signal is not received.
The logic function control unit 8 comprises a logic voice module 13, the logic voice module 13 obtains a working power supply through the control bus 11, and sends out a voice prompt of normal test, reclosing or test failure, prohibiting the use of the voice prompt, meeting the time arrival of the I-state test timer 16, and sending out a voice prompt of normal test and reclosing when the power module 12 generates an alternating current vanishing signal through the voltage change information of the power module 12 and the state of the I-state test timer 16; satisfying the I state trip timer 15, if it reaches a delay time, a voice prompt of "test failure, use prohibition" is issued.
The logic function control unit 8 includes an i-state test timer 16, the i-state test timer 16 obtains a working power supply through the control bus 11, obtains a timing start signal from the bistable circuit 10, starts timing when bistable is in the i-state, and has two paths of outputs after the time arrives: one path of output is connected to the test button 3 to start the test, and the other path of output is connected in series with the 'AC disappearance' non-action signal sent by the power module 12 to serve as the starting condition of the I-state tripping timer 15.
The logic function control unit 8 comprises an I-state tripping timer 15, the I-state tripping timer 15 obtains working power through the control bus 11, a timing starting signal is obtained from the I-state testing timer 16 and the power module 12, when the time of the I-state testing timer 16 arrives and the power module 12 has no 'AC vanishing' signal, the timing is started, the output is directly connected with the switch release in parallel, and after the time arrives, the tripping is directly started.
The logic function control unit 8 comprises a state II timer 14, the state II timer 14 obtains a working power supply through the control bus 11, a timing starting signal is obtained from the bistable circuit 10, the bistable circuit starts timing in the state II, the output is directly connected to the switch release in parallel, and the trip is directly started after the time is reached.
The operation principle of the invention is as follows: when power is transmitted for the first time, the capacitor of the power module 12 is not charged, the bistable circuit 10 is automatically maintained in the state I, and after the state I is delayed for 0.5 seconds by the test timer 16, a leakage test signal is output, so that a leakage test function is started. If the leakage test fails, namely the switch is not tripped, the starting condition of the I-state tripping timer 15 is met, the I-state tripping timer 15 starts to count, and the time delay reaches the direct starting tripping after 0.5 seconds; if the leakage test is normal, i.e. the switch trips, the power module 12 sends an 'alternating current vanishing' signal, the state I tripping timer 15 does not meet the starting condition, does not output a tripping signal, and is switched on again in about 10 seconds of the maintenance of the capacitance and the electric quantity of the power module 12, the bistable circuit 10 triggers the deflection to the state II through the auxiliary contact 17 of the switch, the state II timer 14 starts to count time, and the automatic tripping is performed after about 16 hours of time delay. In addition, when the leakage test is abnormal, the invention cannot be normally used in a closing manner, because the output of the I-state tripping timer 15 is kept before the capacity of the power module 12 is exhausted, namely within about 10 seconds, and the switch is tripped immediately after the closing, but if the capacity of the power module 12 is exhausted and then the switch is closed again, namely after about 10 seconds, the two timers 16 and 15 are tripped after the delay of the I-state test and the tripping, even if the tripping circuit itself fails and cannot be tripped, the voice prompt or the panel alarm can be continued, and the switch can be effectively replaced as soon as possible.
The operation state of the invention is fed back by sound and light, sound is emitted by the logic voice module 13, light is emitted by the test failure indicator lamp 4 and the test normal indicator lamp 5 on the panel of the shell 1, and the sound corresponds to the indicator lamp state one by one. The specific acousto-optic feedback process is as follows: the I state test timer 16 is up, and the power module 12 does not have an alternating current disappearance signal, sends out a test failure, prohibits the use of an audible prompt, and lights the test failure indicator lamp 4; the I state test timer 16 is up, and the power module 12 has an "AC disappearing" signal, and sends out a "test normal", please reclose "sound prompt, and lights the test normal indicator lamp 5. If the switching on is not performed again before the capacitor of the power module 12 is exhausted, the acousto-optic information disappears after the capacitor is exhausted; if the power module 12 is reclosed before the capacity of the capacitor is exhausted, the power module 12 'AC vanishing' signal is reset after the reclosing, and the acousto-optic information is automatically closed.
In summary, the invention adds a logic function control unit 8 on the basis of the common leakage protection switch, the power is taken from the outlet side of the leakage protection switch, and the logic function control unit 8 works after the switch is closed. The logic function control unit 8 comprises a bistable circuit 10, when power is transmitted for the first time, the logic function control unit 8 automatically works in an I state, the I state test timer 16 starts to work, the I state test timer 16 reaches time after 0.5 seconds, a leakage test signal is output, if the test is successful, the switch trips, the test normal indicator lamp 5 is lightened and blinks, meanwhile, a voice prompt of 'test normal, switch-on again' is sent out, after the switch-on again, the bistable circuit 10 is triggered by the switch auxiliary contact 17 to automatically enter a II state, (note: during the switch-off period, the logic function control unit 8 is powered by a capacitor in the power module 12 and can maintain normal work for about 10 seconds, the switch-on again is needed during the period to enter the II state, otherwise, the II state timer 14 starts to count time, and the switch automatically trips after 16 hours). If the test is successful, the switch is not tripped, the time of the I-state tripping timer 15 reaches after 1 second, the tripping device is directly driven to trip, the test failure indicator 4 is lightened and blinks, meanwhile, a voice prompt of 'test failure and use prohibition' is sent out, after the tripping, the output contact of the I-state testing timer 16 can be kept on before the capacitance of the power module 12 is exhausted, at the moment, if the reclosing is performed immediately without delay, if the reclosing is performed after the capacitance is exhausted for a period of time, the tripping is performed after the time of the I-state tripping timer 15 reaches after 1 second, which means that the switch can not be normally closed all the time, thereby meeting the design concept of a safe type electric leakage protection switch.
Claims (5)
1. The utility model provides a safe type earth leakage protection switch, includes casing (1) and circuit board, is provided with electric leakage automatic test circuit on the circuit board, its characterized in that: the circuit board is characterized in that a test button (3), a test failure indicator lamp (4), a test normal indicator lamp (5) and a tripping time prompt information screen (7) are arranged on a panel of the shell (1), a wire inlet and outlet wiring terminal (6) and a base fixing hole (2) are correspondingly arranged on the upper side and the lower side of the shell (1), and a logic function control unit (8) is arranged on the circuit board;
the logic function control unit (8) comprises a panel display module (9), a bistable circuit (10), a logic voice module (13), a power supply module (12), an I state test timer (16), an I state trip timer (15) and an II state timer (14), wherein the input end of the power supply module (12) is connected with the outlet side of the electric leakage automatic test loop, and the output end of the power supply module is respectively connected with the panel display module (9), the bistable circuit (10), the logic voice module (13), the I state test timer (16), the I state trip timer (15) and the II state timer (14) through a control bus (11);
the panel display module (9) is connected with the test failure indicator lamp (4) and the test normal indicator lamp (5) respectively through wires, the input end of the bistable circuit (10) is connected with the switch auxiliary contact (17), the output end of the bistable circuit is connected with the I-state test timer (16) and the II-state timer (14) respectively through a control bus, the output end of the I-state test timer (16) is connected with the I-state trip timer (15) through wires, the output end of the I-state trip timer (15) is connected with the leakage tripping loop, the output end of the II-state timer (14) is connected with the leakage tripping loop, and the output end of the I-state test timer (16) is connected with the test button (3) on the leakage automatic test loop in parallel.
2. A safety type earth leakage protection switch as defined in claim 1, wherein: the time of the I state test timer (16) is 0.3-0.7 seconds.
3. A safety type earth leakage protection switch as defined in claim 1, wherein: the timing time of the II-state timer (14) is 14-18 hours.
4. A safety type earth leakage protection switch as defined in claim 1, wherein: the capacitor of the power supply module (12) maintains the power supply for 8-12 seconds.
5. A safety type earth leakage protection switch as defined in claim 1, wherein: the voice prompt sent by the logic voice module (13) is 'test normal, switch on again' or 'test failure, and the use is forbidden'.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910465717.6A CN110112043B (en) | 2019-05-30 | 2019-05-30 | Safety leakage protection switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910465717.6A CN110112043B (en) | 2019-05-30 | 2019-05-30 | Safety leakage protection switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110112043A CN110112043A (en) | 2019-08-09 |
| CN110112043B true CN110112043B (en) | 2024-03-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910465717.6A Active CN110112043B (en) | 2019-05-30 | 2019-05-30 | Safety leakage protection switch |
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| Country | Link |
|---|---|
| CN (1) | CN110112043B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200953413Y (en) * | 2006-03-13 | 2007-09-26 | 黄华道 | Electrical leakage protection socket with service life stopping detection and detection result prompting function |
| WO2007123389A1 (en) * | 2006-04-26 | 2007-11-01 | See Ni Fong | An earth leakage protection device with time alert feature |
| CN101192731A (en) * | 2006-11-20 | 2008-06-04 | 黄华道 | Secure leakage protection jack with life termination detection function |
| KR100990860B1 (en) * | 2009-04-22 | 2010-10-29 | 엠티엔시 (주) | Electric leakage test system and method of electric leakage breaker |
| CN107910232A (en) * | 2017-12-18 | 2018-04-13 | 淄博职业学院 | A kind of Intelligent leakage protection switch |
| CN209822585U (en) * | 2019-05-30 | 2019-12-20 | 南方电网调峰调频发电有限公司鲁布革水力发电厂 | Safety leakage protection switch |
-
2019
- 2019-05-30 CN CN201910465717.6A patent/CN110112043B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200953413Y (en) * | 2006-03-13 | 2007-09-26 | 黄华道 | Electrical leakage protection socket with service life stopping detection and detection result prompting function |
| WO2007123389A1 (en) * | 2006-04-26 | 2007-11-01 | See Ni Fong | An earth leakage protection device with time alert feature |
| CN101192731A (en) * | 2006-11-20 | 2008-06-04 | 黄华道 | Secure leakage protection jack with life termination detection function |
| KR100990860B1 (en) * | 2009-04-22 | 2010-10-29 | 엠티엔시 (주) | Electric leakage test system and method of electric leakage breaker |
| CN107910232A (en) * | 2017-12-18 | 2018-04-13 | 淄博职业学院 | A kind of Intelligent leakage protection switch |
| CN209822585U (en) * | 2019-05-30 | 2019-12-20 | 南方电网调峰调频发电有限公司鲁布革水力发电厂 | Safety leakage protection switch |
Non-Patent Citations (1)
| Title |
|---|
| 漏电保护器在低压电网中的应用;周志敏;大众用电(09);全文 * |
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| CN110112043A (en) | 2019-08-09 |
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