CN203014260U - Switch state indicator - Google Patents
Switch state indicator Download PDFInfo
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- CN203014260U CN203014260U CN 201220713066 CN201220713066U CN203014260U CN 203014260 U CN203014260 U CN 203014260U CN 201220713066 CN201220713066 CN 201220713066 CN 201220713066 U CN201220713066 U CN 201220713066U CN 203014260 U CN203014260 U CN 203014260U
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Abstract
The utility model relates to a switch state indicator. The utility model can solve a problem of a potential safety hazard existing in the prior art. A technical scheme is characterized in that the indicator comprises a microprocessor, a lockout circuit, a photoelectric isolation input circuit, a switch quantity simulation bar display circuit, a high-voltage charged indication circuit and a switch quantity input signal circuit; an input terminal of the high-voltage charged indication circuit is electrically connected with a secondary end of a high voltage sensor in a high-voltage circuit; an output terminal of the high-voltage charged indication circuit is electrically connected with the input terminal of the photoelectric isolation input circuit; the input terminal of the switch quantity input signal circuit is connected with an auxiliary contact of a breaker in a high voltage switch cabinet; the output terminal of the switch quantity input signal circuit is electrically connected with the input terminal of the photoelectric isolation input circuit; the photoelectric isolation input circuit is connected with the input terminal of the switch quantity simulation bar display circuit; the photoelectric isolation input circuit is also electrically connected with the microprocessor; and the microprocessor is electrically connected with a switch element in the high voltage switch cabinet through the lockout circuit. Safety performance of the indicator is good.
Description
Technical field
The utility model is a kind of power circuit guard member, particularly relates to a kind of indicators for switching condition.
Background technology
The indicators for switching condition function of the switch cubicle that present power industry is used is gradually improved, can quick, intuitive and accurately demonstrate the various states of switch cubicle, integrate the multiple functions such as primary circuit dynamic analog graphoid, on off state indication, circuit breaker position indication, handcart position indication, grounding switch position indication, the indication of spring energy-storage state, electrification in high voltage indication, electric-magnetic lock, Temperature and Humidity Control, voice anti-fault prompting.These deixis partables, its middle-high pressure electrification deixis need to be drawn from the high pressure sensor of switch cubicle the signal of telecommunication of A, B, C three-phase.Most of high pressure sensors are made post insulator style, and its inside is buried underground with high-strength dielectric function material and made the electric capacity plug.One end of electric capacity is connected with the high pressure primary circuit, and the other end is connected with the secondary connection end of transducer internally.Due to the electrification in high voltage LED light on the indicators for switching condition panel, its drive current is to bring in by the output of high pressure sensor to provide, and the capacitance of high pressure sensor is larger, and its drive current that provides is also larger, and whether charged demonstration be also apparent in view.Institute thinks that assurance electrification in high voltage LED light is normally luminous, the capacitance of high pressure sensor is generally all greater than 80pF at present, but when circuit breaks down or accident occurs, the drive current of exporting by the high pressure sensor of this appearance value is a milliampere level, might cause the human electric shock, have certain potential safety hazard.
China Patent Publication No.: CN202206064U, open day on April 25th, 2012, a kind of Intelligent display control device for switch cabinet is disclosed, it comprises processing module, dynamic analog graphoid display module, closed in advance the flash of light indicating module in pre-minute, the intact indicating module in divide-shut brake loop, charged demonstration and locking module, the humiture numeral shows and control module, the anti-error reminding module of intelligent sound, and warning function module, this dynamic analog graphoid display module, should close in advance the flash of light indicating module in pre-minute, this intact indicating module in divide-shut brake loop, this charged demonstration and locking module, this humiture numeral shows and control module, the anti-error reminding module of this intelligent sound and this warning function module are connected with this processing module respectively.In this technical scheme, drive current is also a milliampere level, still might cause the human electric shock, has certain potential safety hazard.
Summary of the invention
The purpose of this utility model is to exist the drive current of high pressure sensor output when circuit breaks down or accident occurs to be a milliampere level for solving present prior art, might cause the human electric shock, there is the problem of certain potential safety hazard, provide a kind of and drive indication by the small electric flow valuve in the human-body safety current value range, can more improve the indicators for switching condition of security performance.
the technical scheme that its technical problem that solves the utility model adopts is: a kind of indicators for switching condition, the electric state that is used for monitoring high-tension circuit middle-high voltage switch, powered by power circuit, comprise microprocessor, exclusive circuit, photoelectricity Isolation input circuit, switching value simulation bar display circuit, electrification in high voltage indicating circuit and switching value input signal circuit, the secondary terminals of the high pressure sensor in the input of described electrification in high voltage indicating circuit and high-tension circuit is electrically connected to, the output of electrification in high voltage indicating circuit is electrically connected to photoelectricity Isolation input circuit input end, the input of switching value input signal circuit is connected with the auxiliary contact of circuit breaker in high-tension switch cabinet, the output of switching value input signal circuit also is electrically connected to photoelectricity Isolation input circuit input end, photoelectricity Isolation input circuit is connected with the input of switching value simulation bar display circuit, photoelectricity Isolation input circuit also is electrically connected to microprocessor, described microprocessor is electrically connected to switch element in high-tension switch cabinet by exclusive circuit.The switching value input signal of switching value input signal circuit is taken from the auxiliary contact of circuit breaker in switch cubicle.Through switching value input signal circuit, photoelectric isolating circuit, on the one hand directly driving switch amount simulation bar display circuit show each switching value minute, close state, on the other hand signal is sent to microprocessor and carries out intelligent logical and control and process.The switching value input signal comprises breaker closing state, breaker open operation state, handcart experiment position, handcart service position, not energy storage of spring/energy storage state, earthing separating brake/"on" position, and the input signal of electrification in high voltage indicating circuit is taken from the high pressure sensor that is connected with bus.When arbitrary when mutually charged, the LED light that directly drives this phase after the processing of the Weak current process electrification in high voltage indicating circuit of the secondary terminals output of high pressure sensor is luminous, high pressure three-phase charged signal sends microprocessor to through photoelectric isolating circuit on the other hand, through output electrification in high voltage block signal after the microprocessor calculation process.
as preferably, described electrification in high voltage indicating circuit comprises rectification circuit, the batch (-type) circuits for triggering, thyristor Q3, inductance L 1, diode D1, LED light and optocoupler, the secondary terminals of the high pressure sensor in the input of described rectification circuit and high-tension circuit is electrically connected to, the positive output end of rectification circuit is connected with the input of batch (-type) circuits for triggering, the negative input end of batch (-type) circuits for triggering is connected with the negative output terminal of rectification circuit, the output of batch (-type) circuits for triggering is connected with the control end of thyristor Q3, the first conduction terminal of inductance L 1 is connected with the positive output end of rectification circuit, the second conduction terminal of inductance L 1 is connected by the positive input terminal of LED light with the optocoupler primary side, the anodic bonding of the negative output terminal of optocoupler primary side and diode D1, the secondary side of optocoupler is connected with the input of photoelectricity Isolation input circuit, the negative electrode of diode D1 is connected with the positive input terminal of batch (-type) circuits for triggering, the anodic bonding of the anode of thyristor Q3 and diode D1, the negative electrode of thyristor Q3 is connected with the negative output terminal of rectification circuit.Arrange like this, even high pressure sensor only has very little capacitance, its Weak current that provides can't directly make LED light luminous, but this Weak current carries out accumulation of energy after processing by the batch (-type) circuits for triggering, just can intermittently obtain larger drive current, make LED light to carry out the electrification in high voltage indication by flashing.Can not aware at an easy rate again the flicker of light source due to people's naked eyes, with greater than the frequency change of 50Hz the time, whether most people is just differentiated to go out light source and is being glimmered when light intensity, and the light source experienced of human eye just sends the light of steady and continuous at this moment.The utility model uses this principle to realize the normal luminescence display of electrification in high voltage LED light.
as preferably, described batch (-type) circuits for triggering comprise capacitor C 1, capacitor C 2, diode D2, triode Q1, triode Q2, resistance R 3, resistance R 4, resistance R 5, resistance R 6, resistance R 7 and resistance R 8, the first conduction terminal that the first conduction terminal of capacitor C 1 is connected with resistance R all is connected with the positive output end of rectification circuit, the second conduction terminal that the second conduction terminal of capacitor C 1 is connected with resistance R all is connected with the first conduction terminal of capacitor C 2, the second conduction terminal of capacitor C 2 is connected with the negative output terminal of rectification circuit, the negative electrode of diode D2 is connected with the second conduction terminal of resistance R 3, the anode of diode D2 is connected with the second conduction terminal of capacitor C 2, the collector electrode of triode Q1 is connected with the negative electrode of diode D2, the emitter of triode Q1 is connected with the base stage of triode Q2, the base stage of triode Q1 is connected with the emitter of triode Q2, the collector electrode of triode Q2 is connected with the control utmost point of thyristor Q3 by resistance R 7, one end of resistance R 4 is connected with the collector electrode of triode Q1, the other end of resistance R 4 is connected with the base stage of triode Q1, one end of resistance R 5 is connected with the base stage of triode Q1, the other end of resistance R 5 is connected with the emitter of triode Q1, one end of resistance R 6 is connected with the base stage of triode Q2, the other end of resistance R 6 is connected with the first end of resistance R 7, the first end of resistance R 8 is connected with the control end of thyristor Q3, the second end of resistance R 8 and the anodic bonding of diode D2.The batch (-type) circuits for triggering carry out step triggering, and auxiliary induction L1 carries out accumulation of energy, just can intermittently obtain larger drive current, make LED light to carry out the electrification in high voltage indication by flashing.
As preferably, described indicators for switching condition also comprises Temperature Humidity Sensor, temperature and humidity control circuit and humiture display circuit, and Temperature Humidity Sensor, temperature and humidity control circuit and humiture display circuit all are electrically connected to microprocessor.Adapted two-way Temperature Humidity Sensor, humiture numerical value is collected microprocessor with the form of digital signal, and through the judgement of microprocessor calculation process logic, auto controlled heater or blower fan carry out work, guarantee that the humiture index in switch cubicle meets working stamndard, and prevent the generation of condensation.The panel of Simultaneous Switching positioning indicator is provided with charactron and is used for showing in real time current humiture value, visual clear display.
As preferably, described indicators for switching condition also comprises human body induction module and voice anti-fault cue circuit, and human body induction module and voice anti-fault cue circuit all are electrically connected to described microprocessor.The voice anti-fault notification portion receives respectively human body induction module signal, on-off state signal and high pressure three-phase charged signal by microprocessor, then controls through intelligent logical and process laggard lang sound alarm, ensures better operating personnel's personal safety.
As preferably, described indicators for switching condition also includes the RS485 communication module, and the RS485 communication module is electrically connected to described microprocessor.RS485 bus and background monitoring computer carry out group-net communication, can realize easily the real-time dynamic operation simulation and remote environment monitoring of the electric primary system that one or more switch cubicle forms.
Substantial effect of the present utility model is: the electrification in high voltage indicating section of this device has adopted the high pressure sensor of low appearance value, the capacitance of high pressure sensor is little, its driving current value that provides is far smaller than the human-body safety current value, can more improve the security performance of indicators for switching condition.
Description of drawings
Fig. 1 is a kind of circuit block diagram of the present utility model;
Fig. 2 is the circuit theory schematic diagram of a phase electrification in high voltage indicating section in the utility model;
Fig. 3 is a kind of circuit theory schematic diagram of the utility model discontinuous formula circuits for triggering.
In figure: 1, microprocessor, 2, photoelectricity Isolation input circuit, 3, the electrification in high voltage indicating circuit, 4, high pressure sensor, 5, the switching value input signal circuit, 6, auxiliary contacts of circuit breaker, 7, switching value simulation bar display circuit, 8, human body induction module, 9, Temperature Humidity Sensor, 10, RS485 communication module, 11, voice anti-fault cue circuit, 12, temperature and humidity control circuit, 13, the humiture display circuit, 14, exclusive circuit, 15, power circuit.
Embodiment
Below by specific embodiment, and by reference to the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment:
a kind of indicators for switching condition (referring to accompanying drawing 1), the electric state that is used for monitoring high-tension circuit middle-high voltage switch, by power circuit 15 power supplies, it is characterized in that: comprise microprocessor 1, exclusive circuit 14, photoelectricity Isolation input circuit 2, switching value simulation bar display circuit 7, electrification in high voltage indicating circuit 3 and switching value input signal circuit 5, the secondary terminals of the high pressure sensor in the input of electrification in high voltage indicating circuit 3 and high-tension circuit is electrically connected to, the output of electrification in high voltage indicating circuit 3 is electrically connected to photoelectricity Isolation input circuit 2 inputs, the input of switching value input signal circuit 5 is connected with auxiliary contacts of circuit breaker 6 in high-tension switch cabinet, the output of switching value input signal circuit 5 also is electrically connected to photoelectricity Isolation input circuit 2 inputs, photoelectricity Isolation input circuit 2 is connected with the input of switching value simulation bar display circuit 7, photoelectricity Isolation input circuit 2 also is electrically connected to microprocessor 1, microprocessor 1 is electrically connected to switch element in high-tension switch cabinet by exclusive circuit 14.electrification in high voltage indicating circuit 3(is referring to accompanying drawing 2) comprise rectification circuit, the batch (-type) circuits for triggering, thyristor Q3, inductance L 1, diode D1, LED light and optocoupler, the secondary terminals of the high pressure sensor in the input of rectification circuit and high-tension circuit is electrically connected to, the positive output end of rectification circuit is connected with the input of batch (-type) circuits for triggering, the negative input end of batch (-type) circuits for triggering is connected with the negative output terminal of rectification circuit, the output of batch (-type) circuits for triggering is connected with the control end of thyristor Q3, the first conduction terminal of inductance L 1 is connected with the positive output end of rectification circuit, the second conduction terminal of inductance L 1 is connected by the positive input terminal of LED light with the optocoupler primary side, the anodic bonding of the negative output terminal of optocoupler primary side and diode D1, the secondary side of optocoupler is connected with the input of photoelectricity Isolation input circuit 2, the negative electrode of diode D1 is connected with the positive input terminal of batch (-type) circuits for triggering, the anodic bonding of the anode of thyristor Q3 and diode D1, the negative electrode of thyristor Q3 is connected with the negative output terminal of rectification circuit.batch (-type) circuits for triggering (referring to accompanying drawing 3) comprise capacitor C 1, capacitor C 2, diode D2, triode Q1, triode Q2, resistance R 3, resistance R 4, resistance R 5, resistance R 6, resistance R 7 and resistance R 8, the first conduction terminal that the first conduction terminal of capacitor C 1 is connected with resistance R all is connected with the positive output end of rectification circuit, the second conduction terminal that the second conduction terminal of capacitor C 1 is connected with resistance R all is connected with the first conduction terminal of capacitor C 2, the second conduction terminal of capacitor C 2 is connected with the negative output terminal of rectification circuit, the negative electrode of diode D2 is connected with the second conduction terminal of resistance R 3, the anode of diode D2 is connected with the second conduction terminal of capacitor C 2, the collector electrode of triode Q1 is connected with the negative electrode of diode D2, the emitter of triode Q1 is connected with the base stage of triode Q2, the base stage of triode Q1 is connected with the emitter of triode Q2, the collector electrode of triode Q2 is connected with the control utmost point of thyristor Q3 by resistance R 7, one end of resistance R 4 is connected with the collector electrode of triode Q1, the other end of resistance R 4 is connected with the base stage of triode Q1, one end of resistance R 5 is connected with the base stage of triode Q1, the other end of resistance R 5 is connected with the emitter of triode Q1, one end of resistance R 6 is connected with the base stage of triode Q2, the other end of resistance R 6 is connected with the first end of resistance R 7, the first end of resistance R 8 is connected with the control end of thyristor Q3, the second end of resistance R 8 and the anodic bonding of diode D2.Indicators for switching condition also comprises Temperature Humidity Sensor 9, temperature and humidity control circuit 12 and humiture display circuit 13, and Temperature Humidity Sensor 9, temperature and humidity control circuit 12 and humiture display circuit 13 all are electrically connected to microprocessor 1.Indicators for switching condition also comprises human body induction module 8 and voice anti-fault cue circuit 11, and human body induction module 8 and voice anti-fault cue circuit 11 all are electrically connected to microprocessor 1.Indicators for switching condition also includes RS485 communication module 10, and RS485 communication module 10 is electrically connected to microprocessor 1.
The switching value input signal of switching value input signal circuit is taken from the auxiliary contact of circuit breaker in switch cubicle.Through switching value input signal circuit, photoelectric isolating circuit, on the one hand directly driving switch amount simulation bar display circuit show each switching value minute, close state, on the other hand signal is sent to microprocessor and carries out intelligent logical and control and process.The switching value input signal comprises breaker closing state, breaker open operation state, handcart experiment position, handcart service position, not energy storage of spring/energy storage state, earthing separating brake/"on" position, and the input signal of electrification in high voltage indicating circuit is taken from the high pressure sensor that is connected with bus.When arbitrary when mutually charged, the LED light that directly drives this phase after the processing of the Weak current process electrification in high voltage indicating circuit of the secondary terminals output of high pressure sensor is luminous, high pressure three-phase charged signal sends microprocessor to through photoelectric isolating circuit on the other hand, through output electrification in high voltage block signal after the microprocessor calculation process.When the present embodiment uses, even high pressure sensor only has very little capacitance, its Weak current that provides can't directly make LED light luminous, but this Weak current carries out accumulation of energy after processing by the batch (-type) circuits for triggering, just can intermittently obtain larger drive current, make LED light to carry out the electrification in high voltage indication by flashing.Can not aware at an easy rate again the flicker of light source due to people's naked eyes, with greater than the frequency change of 50Hz the time, whether most people is just differentiated to go out light source and is being glimmered when light intensity, and the light source experienced of human eye just sends the light of steady and continuous at this moment.The utility model uses this principle to realize the normal luminescence display of electrification in high voltage LED light.
Above-described embodiment is a kind of better scheme of the present utility model, is not that the utility model is done any pro forma restriction, also has other variant and remodeling under the prerequisite that does not exceed the technical scheme that claim puts down in writing.
Claims (6)
1. indicators for switching condition, the electric state that is used for monitoring high-tension circuit middle-high voltage switch, powered by power circuit, it is characterized in that: comprise microprocessor, exclusive circuit, photoelectricity Isolation input circuit, switching value simulation bar display circuit, electrification in high voltage indicating circuit and switching value input signal circuit, the secondary terminals of the high pressure sensor in the input of described electrification in high voltage indicating circuit and high-tension circuit is electrically connected to, the output of electrification in high voltage indicating circuit is electrically connected to photoelectricity Isolation input circuit input end, the input of switching value input signal circuit is connected with the auxiliary contact of circuit breaker in high-tension switch cabinet, the output of switching value input signal circuit also is electrically connected to photoelectricity Isolation input circuit input end, photoelectricity Isolation input circuit is connected with the input of switching value simulation bar display circuit, photoelectricity Isolation input circuit also is electrically connected to microprocessor, described microprocessor is electrically connected to switch element in high-tension switch cabinet by exclusive circuit.
2. indicators for switching condition according to claim 1, it is characterized in that: described electrification in high voltage indicating circuit comprises rectification circuit, the batch (-type) circuits for triggering, thyristor Q3, inductance L 1, diode D1, LED light and optocoupler, the secondary terminals of the high pressure sensor in the input of described rectification circuit and high-tension circuit is electrically connected to, the positive output end of rectification circuit is connected with the input of batch (-type) circuits for triggering, the negative input end of batch (-type) circuits for triggering is connected with the negative output terminal of rectification circuit, the output of batch (-type) circuits for triggering is connected with the control end of thyristor Q3, the first conduction terminal of inductance L 1 is connected with the positive output end of rectification circuit, the second conduction terminal of inductance L 1 is connected by the positive input terminal of LED light with the optocoupler primary side, the anodic bonding of the negative output terminal of optocoupler primary side and diode D1, the secondary side of optocoupler is connected with the input of photoelectricity Isolation input circuit, the negative electrode of diode D1 is connected with the positive input terminal of batch (-type) circuits for triggering, the anodic bonding of the anode of thyristor Q3 and diode D1, the negative electrode of thyristor Q3 is connected with the negative output terminal of rectification circuit.
3. indicators for switching condition according to claim 2, it is characterized in that: described batch (-type) circuits for triggering comprise capacitor C 1, capacitor C 2, diode D2, triode Q1, triode Q2, resistance R 3, resistance R 4, resistance R 5, resistance R 6, resistance R 7 and resistance R 8, the first conduction terminal that the first conduction terminal of capacitor C 1 is connected with resistance R all is connected with the positive output end of rectification circuit, the second conduction terminal that the second conduction terminal of capacitor C 1 is connected with resistance R all is connected with the first conduction terminal of capacitor C 2, the second conduction terminal of capacitor C 2 is connected with the negative output terminal of rectification circuit, the negative electrode of diode D2 is connected with the second conduction terminal of resistance R 3, the anode of diode D2 is connected with the second conduction terminal of capacitor C 2, the collector electrode of triode Q1 is connected with the negative electrode of diode D2, the emitter of triode Q1 is connected with the base stage of triode Q2, the base stage of triode Q1 is connected with the emitter of triode Q2, the collector electrode of triode Q2 is connected with the control utmost point of thyristor Q3 by resistance R 7, one end of resistance R 4 is connected with the collector electrode of triode Q1, the other end of resistance R 4 is connected with the base stage of triode Q1, one end of resistance R 5 is connected with the base stage of triode Q1, the other end of resistance R 5 is connected with the emitter of triode Q1, one end of resistance R 6 is connected with the base stage of triode Q2, the other end of resistance R 6 is connected with the first end of resistance R 7, the first end of resistance R 8 is connected with the control end of thyristor Q3, the second end of resistance R 8 and the anodic bonding of diode D2.
4. indicators for switching condition according to claim 1 and 2, it is characterized in that: described indicators for switching condition also comprises Temperature Humidity Sensor, temperature and humidity control circuit and humiture display circuit, and Temperature Humidity Sensor, temperature and humidity control circuit and humiture display circuit all are electrically connected to microprocessor.
5. indicators for switching condition according to claim 1 and 2, it is characterized in that: described indicators for switching condition also comprises human body induction module and voice anti-fault cue circuit, and human body induction module and voice anti-fault cue circuit all are electrically connected to described microprocessor.
6. indicators for switching condition according to claim 1 and 2, it is characterized in that: described indicators for switching condition also includes the RS485 communication module, and the RS485 communication module is electrically connected to described microprocessor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220713066 CN203014260U (en) | 2012-12-21 | 2012-12-21 | Switch state indicator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220713066 CN203014260U (en) | 2012-12-21 | 2012-12-21 | Switch state indicator |
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| CN203014260U true CN203014260U (en) | 2013-06-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220713066 Expired - Fee Related CN203014260U (en) | 2012-12-21 | 2012-12-21 | Switch state indicator |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103956670A (en) * | 2014-05-22 | 2014-07-30 | 国家电网公司 | Indoor intelligent alternating current metal armoring movable switch device |
| CN106160214A (en) * | 2016-07-06 | 2016-11-23 | 河北箱变电器有限公司 | Switch cubicle Intelligent remote monitoring system |
| CN107291010A (en) * | 2017-07-01 | 2017-10-24 | 合肥东玖电气有限公司 | A kind of on off state display control device |
| CN108346105A (en) * | 2018-02-08 | 2018-07-31 | 重庆方胜共享科技有限公司 | Business handles system automatically on a kind of social insurance normal line |
| CN109147287A (en) * | 2018-11-01 | 2019-01-04 | 国家电网公司 | A kind of warning device preventing mistakenly entering charged chamber |
-
2012
- 2012-12-21 CN CN 201220713066 patent/CN203014260U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103956670A (en) * | 2014-05-22 | 2014-07-30 | 国家电网公司 | Indoor intelligent alternating current metal armoring movable switch device |
| CN106160214A (en) * | 2016-07-06 | 2016-11-23 | 河北箱变电器有限公司 | Switch cubicle Intelligent remote monitoring system |
| CN107291010A (en) * | 2017-07-01 | 2017-10-24 | 合肥东玖电气有限公司 | A kind of on off state display control device |
| CN108346105A (en) * | 2018-02-08 | 2018-07-31 | 重庆方胜共享科技有限公司 | Business handles system automatically on a kind of social insurance normal line |
| CN109147287A (en) * | 2018-11-01 | 2019-01-04 | 国家电网公司 | A kind of warning device preventing mistakenly entering charged chamber |
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Granted publication date: 20130619 Termination date: 20211221 |