CN105277880A - A switch device life test control system - Google Patents
A switch device life test control system Download PDFInfo
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- CN105277880A CN105277880A CN201510802491.6A CN201510802491A CN105277880A CN 105277880 A CN105277880 A CN 105277880A CN 201510802491 A CN201510802491 A CN 201510802491A CN 105277880 A CN105277880 A CN 105277880A
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- time relay
- auxiliary reclay
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- opened contact
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Abstract
The invention provides a switch device life test control system comprising a closing circuit used for sending closing signals to a tested switch and an opening circuit used for sending opening signals to the tested switch. The tested switch comprises an automatic opening and closing control circuit performing motion in response to the closing signals and the opening signals. The closing circuit is connected with the opening circuit in parallel. The closing circuit is triggered to send the closing signals and the closing signals are interrupted after delay of first time; the opening circuit is triggered to send the opening signals after delay of second time; the opening signals are interrupted after delay of third time; the closing circuit is triggered after delay of fourth time for entering the next cycle. The system is simple in structure, low in energy consumption and accurate in motion.
Description
Technical field
The present invention relates to a kind of switchgear durability test control system.
Background technology
Looped network cabinet switch requires K unit (loading switch cabinet) 5000 times, T unit (on-load switch-fuse combined cabinet) 5000 times, V unit (breaker cabinet) 10000 times mechanical life.In order to test the mechanical life of looped network cabinet switch, Chinese patent literature CN104569797A discloses a kind of life tests system and life detecting method of contact switch.The life tests system of this contact switch comprises by slowdown monitoring switch, drive unit, the first counting assembly and the second counting assembly, wherein, drive unit comprises and drives described tested switch opens and the driver closed, to be connected with described actuator electrical and to control the controller that described driver moves, and driver is specially air gun; First counting assembly is electrically connected the driving number of times to record drive unit with drive unit; Second counting assembly is electrically connected with by slowdown monitoring switch to record the conducting number of times by slowdown monitoring switch, the test mode of technique scheme is driven by drive unit to be carried out perseveration by the action button of slowdown monitoring switch, has that action is insensitive, energy consumption large, a complex structure and cannot testing by the serviceable life of the automatic divide-shut brake control circuit of slowdown monitoring switch.
Summary of the invention
The object of the invention is for the deficiencies in the prior art, provide a kind of based on by the switchgear durability test control system of the automatic divide-shut brake control circuit of slowdown monitoring switch, have that energy consumption is little, the accurate advantage of action.
Object of the present invention realizes by following technical solution:
A kind of switchgear durability test control system, comprise for sent by slowdown monitoring switch switching signal combined floodgate circuit and for sending the opening circuit of sub-gate signal to by slowdown monitoring switch, had by slowdown monitoring switch and can to respond point, switching signal carries out the automatic divide-shut brake control circuit of action, combined floodgate circuit is in parallel with opening circuit, be arranged to trigger combined floodgate circuit and send switching signal, and switching signal is interrupted after the delay very first time, trigger opening circuit after postponing for the second time again and send sub-gate signal, and sub-gate signal is interrupted after delay control three time, trigger combined floodgate circuit again after delay control four time and enter next circulation.
Further, the present invention also comprise for postpone the very first time and disconnect opening circuit very first time relay, for postponed for the second time and second time relay of conducting opening circuit, for delay control three time and disconnect combined floodgate circuit the 3rd time relay, for delay control four time and the 4th time relay of conducting combined floodgate circuit.
Further, described combined floodgate circuit is provided with the switch-on controlling module that energising can produce switching signal, and described opening circuit is provided with the separating brake control module that energising can produce sub-gate signal.
Further, the present invention also comprises first, second, third, fourth auxiliary reclay, described combined floodgate circuit comprises the 3rd time relay normally closed contact, the first control part and second control part of connecting successively, first control part comprises the first auxiliary reclay normally opened contact parallel with one another and the 4th time relay normally opened contact, second control part comprises five route roads parallel with one another, and the first via comprises the second auxiliary reclay normally closed contact and switch-on controlling module of series connection mutually; Second tunnel comprises the first auxiliary reclay coil; 3rd tunnel comprises the second time relay normally closed contact and the very first time relay coil of series connection mutually; 4th tunnel comprises very first time relay normally open contact, the second auxiliary reclay first normally opened contact and the second auxiliary reclay coil, with the second auxiliary reclay coils connected in series after very first time relay normally open contact is in parallel with the second auxiliary reclay first normally opened contact; 5th tunnel comprises the second auxiliary reclay second normally opened contact and second time relay coil of series connection mutually.
Further, the first control part of described combined floodgate circuit comprises the first auxiliary reclay normally opened contact parallel with one another, the 4th time relay normally opened contact and starting switch.
Further, described opening circuit comprises very first time relay normally closed contact, the first control part and second control part of connecting successively, first control part comprises the 3rd auxiliary reclay normally opened contact parallel with one another and the second time relay normally opened contact, second control part comprises five route roads parallel with one another, and the first via comprises the 4th auxiliary reclay normally closed contact and the separating brake control module of series connection mutually; Second tunnel comprises the 3rd auxiliary reclay coil; 3rd tunnel comprises the 4th time relay normally closed contact and the 3rd time relay coil of series connection mutually; 4th tunnel comprises the 3rd time relay normally opened contact, the 4th auxiliary reclay first normally opened contact and the 4th auxiliary reclay coil, with the 4th auxiliary reclay coils connected in series after the 3rd time relay normally opened contact is in parallel with the 4th auxiliary reclay first normally opened contact; 5th tunnel comprises the 4th auxiliary reclay second normally opened contact and the 4th time relay coil of series connection mutually.
Further, described combined floodgate circuit is provided with the combined floodgate counter for detecting the switch-on controlling module number of starts, and described opening circuit is provided with the separating brake counter for detecting the separating brake control module number of starts.
Further, described combined floodgate counter is in parallel with switch-on controlling module, and described separating brake counter is in parallel with separating brake control module.
Further, described switch-on controlling module and described separating brake control module are the AC/DC changeover switch for by AC conversion being direct current light current.
Further, the present invention also comprises the power module to combined floodgate circuit and opening circuit supply 220V alternating current.
The present invention has following beneficial effect:
The present invention is based on and undertaken by the automatic divide-shut brake control circuit of slowdown monitoring switch, realize being interrupted sending to automatic divide-shut brake control circuit repeatedly by multiple time delay and divide, switching signal, automatic divide-shut brake control circuit is made to control automatically to be divided/feed motion by slowdown monitoring switch, thus the life-span of testing by the mechanical life of slowdown monitoring switch and automatic divide-shut brake control circuit, because automatic divide-shut brake control circuit is light current circuit, (divide therefore only need to the faint electric signal of automatic divide-shut brake control circuit one, switching signal) just can realize being controlled by the divide-shut brake of slowdown monitoring switch, there is structure simple, energy consumption is low, the advantages such as action is accurate, point, switching signal by point, switch-on controlling module produces, point, the principle of work of switch-on controlling module is that energising can produce point, switching signal, thus raising control accuracy, the present invention also divides by arranging, the work times of combined floodgate counter records divide-shut brake control module, thus determines by the test volume of slowdown monitoring switch.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Fig. 1 is circuit theory diagrams of the present invention.
Embodiment
With reference to shown in Fig. 1, a kind of switchgear durability test control system, by slowdown monitoring switch have can to respond point, automatic divide-shut brake control circuit that switching signal carries out action, as the Remote circuit in ring main unit low-pressure cabinet.
A kind of switchgear durability test control system, comprise 220V AC power supply module and combined floodgate circuit parallel with one another and opening circuit, be arranged to trigger combined floodgate circuit and send switching signal, and switching signal is interrupted after the delay very first time, trigger opening circuit after postponing for the second time again and send sub-gate signal, and after delay control three time, interrupt sub-gate signal, then trigger after delay control four time combined floodgate circuit enter next circulation.
Concrete components and parts comprise switch-on controlling module MK1, separating brake control module MK2, combined floodgate counter BZ1, separating brake counter BZ2, very first time relay K T1, the second time relay KT2, the 3rd time relay KT3, the 4th time relay KT4, the first auxiliary reclay KA1, the second auxiliary reclay KA2, the 3rd auxiliary reclay KA3, the 4th auxiliary reclay KA4, starting switch SB2, shutdown switch SB1.
Combined floodgate circuit comprises the 3rd time relay KT3 normally closed contact, the first control part and second control part of connecting successively, first control part comprises the first auxiliary reclay KA1 normally opened contact, the 4th time relay KT4 normally opened contact and starting switch SB2 parallel with one another, second control part comprises five route roads parallel with one another, the first via comprises the second auxiliary reclay KA2 normally closed contact, switch-on controlling module MK1 and combined floodgate counter BZ1, switch-on controlling module MK1 and connects with the second auxiliary reclay KA2 with combined floodgate counter BZ1 parallel connection again; Second tunnel comprises the first auxiliary reclay KA1 coil; 3rd tunnel comprises the second time relay KT2 normally closed contact and the very first time relay K T1 coil of series connection mutually; 4th tunnel comprises very first time relay K T1 normally opened contact, the second auxiliary reclay KA2 first normally opened contact and the second auxiliary reclay KA2 coil, with the second auxiliary reclay KA2 coils connected in series after very first time relay K T1 normally opened contact is in parallel with the second auxiliary reclay KA2 first normally opened contact; 5th tunnel comprises the second auxiliary reclay KA2 second normally opened contact and second time relay KT2 coil of series connection mutually.
Opening circuit comprises very first time relay K T1 normally closed contact, the first control part and second control part of connecting successively, first control part comprises the 3rd auxiliary reclay KA3 normally opened contact parallel with one another and the second time relay KT2 normally opened contact, second control part comprises five route roads parallel with one another, the first via comprises the 4th auxiliary reclay KA4 normally closed contact, separating brake control module MK2 and separating brake counter BZ2, separating brake control module MK2 is in parallel with separating brake counter BZ2, then connects with the 4th auxiliary reclay KA4 normally closed contact; Second tunnel comprises the 3rd auxiliary reclay KA3 coil; 3rd tunnel comprises the 4th time relay KT4 normally closed contact and the 3rd time relay KT3 coil of series connection mutually; 4th tunnel comprises the 3rd time relay KT3 normally opened contact, the 4th auxiliary reclay KA4 first normally opened contact and the 4th auxiliary reclay KA4 coil, with the 4th auxiliary reclay KA4 coils connected in series after the 3rd time relay KT3 normally opened contact is in parallel with the 4th auxiliary reclay KA4 first normally opened contact; 5th tunnel comprises the 4th auxiliary reclay KA4 second normally opened contact and the 4th time relay KT4 coil of series connection mutually.Switch-on controlling module MK1 and separating brake control module MK2 is the AC/DC changeover switch for by AC conversion being direct current weak electric signal, starting switch SB2 is for often to leave reset switch for starting characteristics test, shutdown switch SB1 is connected on power supply output line road, for normally closed reset switch is for stopping test.
Concrete test method is: received by the signal output part of separating brake control module MK2 and switch-on controlling module MK1 by the input interface of the low-pressure cabinet Remote circuit of slowdown monitoring switch, then by starting switch SB2 starting characteristics test, very first time relay K T1 disconnects opening circuit and disconnects switch-on controlling module MK1 by the second auxiliary reclay KA2 after postponing the very first time, second time relay KT2 coordinates very first time relay K T1 conducting opening circuit after postponing for the second time, 3rd time relay KT3 disconnects combined floodgate circuit and disconnects separating brake control module MK2 by the 4th auxiliary reclay KA4 after being used for delay control three time, 4th time relay KT4 coordinates the 3rd time relay KT3 conducting combined floodgate circuit after being used for delay control four time, sub-gate signal and switching signal can be produced to control to be carried out divide-shut brake action by slowdown monitoring switch in the time of separating brake control module MK2 and switch-on controlling module MK1 conducting.
The above, be only preferred embodiment of the present invention, therefore can not limit scope of the invention process with this, and the equivalence namely done according to the present patent application the scope of the claims and description changes and modifies, and all should still remain within the scope of the patent.
Claims (10)
1. a switchgear durability test control system, comprise for sent by slowdown monitoring switch switching signal combined floodgate circuit and for sending the opening circuit of sub-gate signal to by slowdown monitoring switch, had by slowdown monitoring switch and can to respond point, switching signal carries out the automatic divide-shut brake control circuit of action, combined floodgate circuit is in parallel with opening circuit, be arranged to trigger combined floodgate circuit and send switching signal, and switching signal is interrupted after the delay very first time, trigger opening circuit after postponing for the second time again and send sub-gate signal, and sub-gate signal is interrupted after delay control three time, trigger combined floodgate circuit again after delay control four time and enter next circulation.
2. a kind of switchgear durability test control system according to claim 1, is characterized in that: also comprise for postpone the very first time and disconnect opening circuit very first time relay, for postponed for the second time and second time relay of conducting opening circuit, for delay control three time and disconnect combined floodgate circuit the 3rd time relay, for delay control four time and the 4th time relay of conducting combined floodgate circuit.
3. a kind of switchgear durability test control system according to claim 2, it is characterized in that: described combined floodgate circuit is provided with the switch-on controlling module that energising can produce switching signal, described opening circuit is provided with the separating brake control module that energising can produce sub-gate signal.
4. a kind of switchgear durability test control system according to claim 3, it is characterized in that: also comprise first, second, third, fourth auxiliary reclay, described combined floodgate circuit comprises the 3rd time relay normally closed contact, the first control part and second control part of connecting successively, first control part comprises the first auxiliary reclay normally opened contact parallel with one another and the 4th time relay normally opened contact, second control part comprises five route roads parallel with one another, and the first via comprises the second auxiliary reclay normally closed contact and switch-on controlling module of series connection mutually; Second tunnel comprises the first auxiliary reclay coil; 3rd tunnel comprises the second time relay normally closed contact and the very first time relay coil of series connection mutually; 4th tunnel comprises very first time relay normally open contact, the second auxiliary reclay first normally opened contact and the second auxiliary reclay coil, with the second auxiliary reclay coils connected in series after very first time relay normally open contact is in parallel with the second auxiliary reclay first normally opened contact; 5th tunnel comprises the second auxiliary reclay second normally opened contact and second time relay coil of series connection mutually.
5. a kind of switchgear durability test control system according to claim 4, is characterized in that: the first control part of described combined floodgate circuit comprises the first auxiliary reclay normally opened contact parallel with one another, the 4th time relay normally opened contact and starting switch.
6. a kind of switchgear durability test control system according to claim 4, it is characterized in that: described opening circuit comprises very first time relay normally closed contact, the first control part and second control part of connecting successively, first control part comprises the 3rd auxiliary reclay normally opened contact parallel with one another and the second time relay normally opened contact, second control part comprises five route roads parallel with one another, and the first via comprises the 4th auxiliary reclay normally closed contact and the separating brake control module of series connection mutually; Second tunnel comprises the 3rd auxiliary reclay coil; 3rd tunnel comprises the 4th time relay normally closed contact and the 3rd time relay coil of series connection mutually; 4th tunnel comprises the 3rd time relay normally opened contact, the 4th auxiliary reclay first normally opened contact and the 4th auxiliary reclay coil, with the 4th auxiliary reclay coils connected in series after the 3rd time relay normally opened contact is in parallel with the 4th auxiliary reclay first normally opened contact; 5th tunnel comprises the 4th auxiliary reclay second normally opened contact and the 4th time relay coil of series connection mutually.
7. a kind of switchgear durability test control system according to claim 3 or 4 or 5, it is characterized in that: described combined floodgate circuit is provided with the combined floodgate counter for detecting the switch-on controlling module number of starts, described opening circuit is provided with the separating brake counter for detecting the separating brake control module number of starts.
8. a kind of switchgear durability test control system according to claim 7, it is characterized in that: described combined floodgate counter is in parallel with switch-on controlling module, described separating brake counter is in parallel with separating brake control module.
9. a kind of switchgear durability test control system according to claim 3 or 4 or 5, is characterized in that: described switch-on controlling module and described separating brake control module are the AC/DC changeover switch for by AC conversion being direct current light current.
10. a kind of switchgear durability test control system according to any one of claim 1 to 6, is characterized in that: also comprise the power module to combined floodgate circuit and opening circuit supply 220V alternating current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510802491.6A CN105277880B (en) | 2015-11-19 | 2015-11-19 | A kind of switchgear life test control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510802491.6A CN105277880B (en) | 2015-11-19 | 2015-11-19 | A kind of switchgear life test control system |
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| CN105277880A true CN105277880A (en) | 2016-01-27 |
| CN105277880B CN105277880B (en) | 2018-01-12 |
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| CN201510802491.6A Active CN105277880B (en) | 2015-11-19 | 2015-11-19 | A kind of switchgear life test control system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106918780A (en) * | 2017-03-20 | 2017-07-04 | 陕西法士特齿轮有限责任公司 | A kind of pressure switch function life-span test control system and method |
| CN106992094A (en) * | 2016-11-26 | 2017-07-28 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Connection in series-parallel sequential logic relay circuit network |
| CN108663615A (en) * | 2018-05-08 | 2018-10-16 | 张永升 | A kind of programmable automatic cycle testing platform of switching mode electric operator |
| CN109406126A (en) * | 2018-11-28 | 2019-03-01 | 广东电网有限责任公司 | A kind of mechanical characteristic of high-voltage circuit breaker experimental rig |
| CN109580211A (en) * | 2019-01-25 | 2019-04-05 | 广东电网有限责任公司 | A kind of mechanical characteristic test system of high-voltage circuitbreaker |
| CN109581090A (en) * | 2017-09-28 | 2019-04-05 | 比亚迪股份有限公司 | The endurance testing device and life-span test system of master control preliminary filling device |
| CN114281060A (en) * | 2021-12-15 | 2022-04-05 | 上海平高天灵开关有限公司 | Mechanical life test device based on singlechip |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101144848A (en) * | 2007-06-28 | 2008-03-19 | 天津市百利电气有限公司 | Multifunctional integrative life experimental platform and its control method |
| CN101344574A (en) * | 2008-08-18 | 2009-01-14 | 天津市电力公司 | Mechanical endurance test instrument for high voltage switch |
| CN201637824U (en) * | 2010-01-28 | 2010-11-17 | 江苏大全凯帆电器有限公司 | Delivery life test device of plastic case circuit breaker |
| US20100296220A1 (en) * | 2009-05-21 | 2010-11-25 | Ls Industrial Systems Co., Ltd. | Abnormal current detecting circuit for circuit breaker |
| CN202404209U (en) * | 2011-11-15 | 2012-08-29 | 江苏大全长江电器股份有限公司 | Breaker life tester with contact on-off test function |
| CN104569797A (en) * | 2013-10-22 | 2015-04-29 | 珠海格力电器股份有限公司 | Life detection system and life detection method of contact switch |
| CN205210271U (en) * | 2015-11-19 | 2016-05-04 | 泉州七星电气有限公司 | Switchgear life test control system |
-
2015
- 2015-11-19 CN CN201510802491.6A patent/CN105277880B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101144848A (en) * | 2007-06-28 | 2008-03-19 | 天津市百利电气有限公司 | Multifunctional integrative life experimental platform and its control method |
| CN101344574A (en) * | 2008-08-18 | 2009-01-14 | 天津市电力公司 | Mechanical endurance test instrument for high voltage switch |
| US20100296220A1 (en) * | 2009-05-21 | 2010-11-25 | Ls Industrial Systems Co., Ltd. | Abnormal current detecting circuit for circuit breaker |
| CN201637824U (en) * | 2010-01-28 | 2010-11-17 | 江苏大全凯帆电器有限公司 | Delivery life test device of plastic case circuit breaker |
| CN202404209U (en) * | 2011-11-15 | 2012-08-29 | 江苏大全长江电器股份有限公司 | Breaker life tester with contact on-off test function |
| CN104569797A (en) * | 2013-10-22 | 2015-04-29 | 珠海格力电器股份有限公司 | Life detection system and life detection method of contact switch |
| CN205210271U (en) * | 2015-11-19 | 2016-05-04 | 泉州七星电气有限公司 | Switchgear life test control system |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106992094A (en) * | 2016-11-26 | 2017-07-28 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Connection in series-parallel sequential logic relay circuit network |
| CN106992094B (en) * | 2016-11-26 | 2019-02-05 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Series-parallel sequential logic relay circuit network |
| CN106918780A (en) * | 2017-03-20 | 2017-07-04 | 陕西法士特齿轮有限责任公司 | A kind of pressure switch function life-span test control system and method |
| CN109581090A (en) * | 2017-09-28 | 2019-04-05 | 比亚迪股份有限公司 | The endurance testing device and life-span test system of master control preliminary filling device |
| CN108663615A (en) * | 2018-05-08 | 2018-10-16 | 张永升 | A kind of programmable automatic cycle testing platform of switching mode electric operator |
| CN109406126A (en) * | 2018-11-28 | 2019-03-01 | 广东电网有限责任公司 | A kind of mechanical characteristic of high-voltage circuit breaker experimental rig |
| CN109406126B (en) * | 2018-11-28 | 2023-12-29 | 广东电网有限责任公司 | Mechanical characteristic test device for high-voltage circuit breaker |
| CN109580211A (en) * | 2019-01-25 | 2019-04-05 | 广东电网有限责任公司 | A kind of mechanical characteristic test system of high-voltage circuitbreaker |
| CN114281060A (en) * | 2021-12-15 | 2022-04-05 | 上海平高天灵开关有限公司 | Mechanical life test device based on singlechip |
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