CN104578117A - Intelligent phase choosing switch based on power line carrier communication and control circuit thereof - Google Patents
Intelligent phase choosing switch based on power line carrier communication and control circuit thereof Download PDFInfo
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- CN104578117A CN104578117A CN201410856979.2A CN201410856979A CN104578117A CN 104578117 A CN104578117 A CN 104578117A CN 201410856979 A CN201410856979 A CN 201410856979A CN 104578117 A CN104578117 A CN 104578117A
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- power supply
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/26—Arrangements for eliminating or reducing asymmetry in polyphase networks
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
Abstract
The invention provides an intelligent phase choosing switch based on power line carrier communication and a control circuit of the intelligent phase choosing switch. The intelligent phase choosing switch comprises a switch controller and the control circuit, wherein one end of the switch controller is connected with a power supply bus, the other end of the switch controller is connected with a current mutual inductor, the power supply bus is further connected with a contactor and one end of a diode, the other end of the diode is connected with one end of an auxiliary relay in series, and the contactor, the diode and the auxiliary relay are connected in parallel; the auxiliary relay and the other end of the diode are connected with the current mutual inductor; the control circuit is composed of a microprocessor, a carrier communication module, a signal sampling conditioning module, a power supply module, a relay driving module and a contractor driving module. According to the intelligent phase choosing switch, the control circuit of the intelligent phase choosing switch is simplified, meanwhile, the equipment reliability is improved, losses are quite low, no radiating circuit needs to be added, arc-free switching is achieved, the service life of the contactor and the service life of the auxiliary relay can be greatly prolonged, the power supply system phase-to-phase switching time is short, and the requirement for sensitive loads can be met.
Description
Technical field
The present invention relates to field of electrical equipment, particularly relate to a kind of Intelligent phase-selection switch based on power line carrier, PLC and control circuit thereof.
Background technology
Switch a kind ofly can make open circuit, makes current interruptions or or make it flow to the electronic component of other circuit.Modal switch is the electromechanical equipment allowing people operate, and wherein has one or several electronic contact.The closed expression contact conducting of node, allows electric current to flow through; The open circuit of switch represents that electronic contact not conducting forms open circuit, does not allow electric current to flow through.
Switch is the most basic in electrical network, is also one of most important equipment, is used for, to the conducting of different load in circuit and disconnection, realizing controlling the difference of circuit.Switch can be divided into multiple different kind according to the difference of its structure, purposes, and wherein electric mechanical switch is a kind of switch of extensive use, and it take mechanical mechanism as the switch of critical piece.
Electric mechanical switch have structure simple, apply advantage easily, the requirement of most of system to control circui can be met, and electric mechanical switch also can be divided into multiple different switch, as single control switch, double control switch, more-control switch etc. according to different application circuits, demand for control.But electric mechanical switch also has the place of its deficiency, if electric mechanical switch is when carrying out the operation of on-off, due to the restriction of its mechanical structure self, the inherent characteristic of mechanical structure makes the switching of electric mechanical switch cannot accomplish seamless switching.Simultaneously at electric mechanical switch closed or when disconnecting, also triggering can be caused to deteriorate due to phenomenons such as the vibration of its contact, the starting the arc, the problem such as electromagnetic interference and electric energy loss, this not only limits the scope of application of electric mechanical switch, also reduce its electric useful life simultaneously.
For the Special controlling place of the seamless switching of control overflow, generally select Intelligent phase-selection switch, Intelligent phase-selection switch is that one is widely used in low-voltage reactive compensator capable, can the circuit of alternative composite switch, contactor or thyristor, can meet as switched capacitor, sensitive load etc. require higher situation.But current correlation technique exists certain deficiency, the Intelligent phase-selection switch structure as current is more complicated, and simultaneously A.C. contactor is wherein limited for useful life, often produces the problem that the starting the arc is burnt; And if use thyristor can raise its cost, and further its control circuit complicated etc.
Therefore, how effectively to design one and can meet the contour performance requirement of seamless switching, have better simply structure, the Intelligent phase-selection switch of Applied economy just becomes problem demanding prompt solution simultaneously.
Summary of the invention
The object of the present invention is to provide a kind of Intelligent phase-selection switch based on power line carrier, PLC and control circuit thereof, by using the automatic phase selecting of electric power carrier communication technology intelligent control switch, to balance the three-phase load of low-voltage network.
A part of the present invention, for providing a kind of Intelligent phase-selection switch based on power line carrier, PLC, is characterized in that, comprising:
On-off controller, its one end connects power supply bus, and the other end connects current transformer;
The other end of power supply bus connects one end of contactor and diode respectively;
One end of the other end series connection auxiliary relay of diode;
Contactor is in parallel with described diode and auxiliary relay;
Auxiliary relay is connected current transformer with the other end of diode;
On-off controller passes through to export respective switch signal controlling contactor and auxiliary relay, for controlling the phase selection of power supply.
On-off controller is by carrier communication mode reception control signal.
Contactor, diode and auxiliary relay are respectively multiple.
Contactor, diode and auxiliary relay are connected on the not homophase of power supply.
Another part of the present invention is the control circuit providing a kind of Intelligent phase-selection switch based on power line carrier, PLC, it is characterized in that, comprising:
Microprocessor, and be connected to carrier communication module, sample of signal conditioning module, power supply module, relay driving module and the contactor driver module on microprocessor;
Carrier communication module receives phase selection switching command, and phase selection switching command is transferred to microprocessor;
Sample of signal conditioning module connects current transformer and power supply bus and samples, and sampled signal is transferred to microprocessor after conditioning;
Microprocessor is according to the phase selection switching command received and sampled signal, and control relay driver module and contactor driver module export corresponding switching signal;
Power supply module is microprocessor power supply.
The phase selection result performed according to phase selection switching command is transferred to distant place network by carrier communication module and shows by microprocessor after carrier communication.
Power supply model calling power supply bus, by power supply bus acquisition power supply and to microprocessor power supply.
Intelligent phase-selection switch based on power line carrier, PLC of the present invention and control circuit thereof have the following advantages:
(1) by using diode as electronic power switch, simplifying control circuit, also improving equipment dependability simultaneously.
(2) loss is extremely low, without the need to additional heat circuit.
(3) achieve commutating without arcing, greatly can extend the life-span of contactor and auxiliary relay.
(4) electric power system is short for alternate switching time, can meet the requirement of sensitive load.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structure chart of an embodiment of the Intelligent phase-selection switch based on power line carrier, PLC of the present invention and control circuit thereof.
Fig. 2 is the circuit structure diagram of an embodiment of the Intelligent phase-selection switch based on power line carrier, PLC of the present invention and control circuit thereof.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Fig. 1 is the structure chart of an embodiment of the Intelligent phase-selection switch based on power line carrier, PLC of the present invention and control circuit thereof, and Fig. 2 is the circuit structure diagram of an embodiment of the Intelligent phase-selection switch based on power line carrier, PLC of the present invention and control circuit thereof.
As shown in Figure 1 and Figure 2, the symbol in figure in circuit is, J1, J3, J5 are contactor, and J2, J4, J6 are auxiliary relay, and D1, D2, D3 are diode, and TA is current transformer, and K1, K2, K3, K4, K5, K6 are switching signal.
As shown in Figure 1, the present embodiment a kind of Intelligent phase-selection switch based on power line carrier, PLC is provided, it is characterized in that, comprising:
On-off controller, its one end connects power supply bus, and the other end connects current transformer TA; Power supply bus also connects one end of contactor J1, J3, J5 and diode D1, D2, D3 respectively; One end of the other end series connection auxiliary relay J2, J4, J6 of diode D1, D2, D3; Contactor J1, J3, J5 are in parallel with diode D1, D2, D3 and auxiliary relay J2, J4, J6; Auxiliary relay J2, J4, J6 are connected current transformer with the other end of diode D1, D2, D3; On-off controller passes through to export respective switch signal K1, K2, K3, K4, K5, K6 control contactor J1, J3, J5 and auxiliary relay J2, J4, J6, for controlling the phase selection of power supply.
Concrete, contactor J1, J3, J5, diode D1, D2, D3 and auxiliary relay J2, J4, J6 are respectively multiple, and its number is equal, connect power supply bus respectively in one end of on-off controller, and the other end connects current transformer TA.
Power supply bus is also in series with one end of contactor J1, J3, J5 in parallel and diode D1, D2, D3.
One end and diode D1, D2, D3 other end of auxiliary relay J2, J4, J6 are in series, and namely auxiliary relay J2, J4, J6 and contactor J1, J3, J5 are in parallel.
Auxiliary relay J2, J4, J6 are connected the other end of current transformer TA with the other end of contactor J1, J3, J5.
On-off controller is by the control signal of carrier communication mode receiving key, and export corresponding switching signal K1, K2, K3, K4, K5, K6 control contactor J1, J3, J5 according to received control signal and auxiliary relay J2, J4, J6 carry out corresponding on or off operation respectively, thus realize operating the respective selection of power supply according to control signal.
As shown in Figure 2, the control circuit providing a kind of Intelligent phase-selection switch based on power line carrier, PLC of the present embodiment, is characterized in that, comprising:
Microprocessor, and be connected to carrier communication module, sample of signal conditioning module, power supply module, relay driving module and the contactor driver module on microprocessor;
Carrier communication module receives phase selection switching command, and phase selection switching command is transferred to microprocessor;
Sample of signal conditioning module connects current transformer TA and power supply bus and samples, and sampled signal is transferred to microprocessor after conditioning;
Microprocessor is according to the phase selection switching command received and sampled signal, and control relay driver module and contactor driver module export corresponding switching signal K1, K2, K3, K4, K5, K6;
Power supply module is microprocessor power supply.
Concrete, connect carrier communication module, sample of signal conditioning module, power supply module, relay driving module and contactor driver module on the microprocessor respectively.
Wherein, control circuit receives the phase selection switching command assigned from distant place network control by carrier communication module, and the phase selection switching command received is transferred to microprocessor processes.
Sample of signal conditioning module connects the current transformer TA in Intelligent phase-selection switch and power supply bus respectively, and power supply sampling is carried out to its power supply connected, to measure Selecting phasing and the power supply loading condition of current Intelligent phase-selection switch, and sampled signal is transferred to microprocessor and processes after conditioning accordingly.
Microprocessor is according to connecting after phase selection switching command that carrier communication receives and sampled signal carry out integrated treatment, and control relay driver module and contactor driver module export corresponding switching signal K1, K2, K3, K4, K5, K6 to the on or off operation of control contactor J1, J3, J5 and auxiliary relay J2, J4, J6 respectively.
Power supply module connects power supply bus by it and obtains power supply, and the backward microprocessor power supply of electric energy process that will obtain, to meet the demand of microprocessor work.
Further, microprocessor can perform the operation of corresponding phase selection according to the phase selection switching command received, the redlyyest the result of operation is transmitted back distant place network control by carrier communication module again after carrier communication show, realize replying operating result situation to operation side.
The present embodiment based on the specific works step of the Intelligent phase-selection switch of power line carrier, PLC is:
(1) judge whether the supply load in electric power system balances, judge to power according to voltage and current imbalance factor, method is:
Wherein, U2 is negative sequence voltage, and I2 is negative-sequence current, and U1 is positive sequence voltage, and I1 is forward-order current.
Specify in International Power association, during U% > 3 or I% > 5, three-phase load unbalance can cause unfavorable and infringement to power supply facilities.
(2) centralized control center in the network control of a distant place judges light load phase in electric power system and heavy load phase by the size of each phase current, after carrying out computing, produces corresponding phase selection switching command according to load balancing principle and system optimizing control.
(3) phase selection switching command is issued to each Intelligent phase-selection switch by power line carrier, PLC mode by distant place network control.
(4) control circuit of Intelligent phase-selection switch is switched to another phase by the phase selection switching command received mutually from one, is exemplified as and is switched to B phase from A phase in the present embodiment.
(5) Intelligent phase-selection switch controls self to excise from A phase.Microprocessor exports corresponding switching signal K1, K2, K3, K4, K5, K6 by control relay driver module and contactor driver module, closed auxiliary relay J2 is controlled by switching signal K2, because contactor J1 is in closure state, after auxiliary relay J2 is closed, electric current is not had to pass through.When A phase voltage is positive half cycle, switching signal K1 control contactor J1 power-off, along with the increase of the contact distance of contactor J1, the voltage at two ends, contact also increases, when voltage exceedes the conducting voltage 0.7V of diode D1, diode D1 conducting, and the voltage clamping that contact in contactor J1 contact separation process is born is at below 0.7V, contactor J1 contact disconnects completely in the positive half cycle of A phase voltage.When A phase voltage is negative half-cycle, switching signal K2 controls auxiliary relay J2 and disconnects, at the negative half-cycle of A phase voltage, the not conducting of diode D1 reverse bias, do not have electric current by load, auxiliary relay J2 completes disconnection, and namely Intelligent phase-selection switch completes and excises process from A phase
(6) Intelligent phase-selection switch controls self access B phase.Microprocessor exports corresponding switching signal K1, K2, K3, K4, K5, K6 by control relay driver module and contactor driver module, be energized at the negative half period of B phase voltage by switching signal K4 control relay J4, relay contact is steady closure when B phase voltage negative half period, due to diode D2 reverse bias, do not have electric current to pass through in closing of contact process, Intelligent phase-selection switch is also in off-state; When after B phase voltage zero passage, the rapid conducting of diode D2, load starts have electric current to flow through, and Simultaneous Switching signal K3 control contactor J3 is energized, the contact of contactor J3 completes steady closure during diode D2 forward conduction, namely completes Intelligent phase-selection switch access B phase process.
At the present embodiment Intelligent phase-selection switch access B phase time, in the process of the contactor J3 closing of contact, distance between contact is from the ultimate range disconnected to complete period of contact, and the voltage that contact is born is only the forward voltage 0.7V of diode D2, therefore can not produce surge current or the starting the arc.
The Intelligent phase-selection switch based on power line carrier, PLC of the present embodiment and control circuit thereof have structure simple, control advantage easily; can effectively prevent the situation such as surge current or the starting the arc; the normal work of protection Intelligent phase-selection switch; phase selection switch speed can meet the demands simultaneously, applies to the circuit controlling sensitive load.
Intelligent phase-selection switch based on power line carrier, PLC of the present invention and control circuit thereof are by using diode as electronic power switch, simplify control circuit, also improve equipment dependability simultaneously, loss is extremely low, without the need to additional heat circuit, achieve commutating without arcing, greatly can extend the life-span of contactor and auxiliary relay, electric power system is short for alternate switching time, can meet the requirement of sensitive load.
Last it is noted that above embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (7)
1. based on an Intelligent phase-selection switch for power line carrier, PLC, it is characterized in that, comprising:
On-off controller, its one end connects power supply bus, and the other end connects current transformer;
Described power supply bus also connects one end of contactor and diode;
One end of the other end series connection auxiliary relay of described diode;
Described contactor is in parallel with described diode and auxiliary relay;
Described auxiliary relay is connected described current transformer with the other end of described diode;
Described on-off controller passes through to export contactor and described auxiliary relay described in respective switch signal controlling, for controlling the phase selection of power supply.
2. a kind of Intelligent phase-selection switch based on power line carrier, PLC according to claim 1, is characterized in that, described on-off controller is by carrier communication mode reception control signal.
3. a kind of Intelligent phase-selection switch based on power line carrier, PLC according to claim 1, it is characterized in that, described contactor, diode and auxiliary relay are respectively multiple.
4. a kind of Intelligent phase-selection switch based on power line carrier, PLC according to claim 3, it is characterized in that, described contactor, diode and auxiliary relay are connected on the not homophase of power supply.
5. based on a control circuit for the Intelligent phase-selection switch of power line carrier, PLC, it is characterized in that, comprising:
Microprocessor, and be connected to carrier communication module, sample of signal conditioning module, power supply module, relay driving module and the contactor driver module on described microprocessor;
Described carrier communication module receives phase selection switching command, and described phase selection switching command is transferred to described microprocessor;
Described sample of signal conditioning module connects described current transformer and power supply bus and samples, and sampled signal is transferred to described microprocessor after conditioning;
Described microprocessor, according to the described phase selection switching command received and sampled signal, controls described relay driving module and contactor driver module exports corresponding switching signal;
Described power supply module is described microprocessor power supply.
6. a kind of Intelligent phase-selection switch based on power line carrier, PLC according to claim 5, it is characterized in that, the phase selection result performed according to described phase selection switching command is transferred to distant place network by described carrier communication module and shows by described microprocessor after carrier communication.
7. a kind of Intelligent phase-selection switch based on power line carrier, PLC according to claim 5, is characterized in that, power supply bus described in described power supply model calling, by described power supply bus acquisition power supply and to described microprocessor power supply.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410856979.2A CN104578117B (en) | 2014-12-31 | 2014-12-31 | A kind of intelligent phase-selection switch and its control circuit based on power line carrier, PLC |
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| CN201410856979.2A CN104578117B (en) | 2014-12-31 | 2014-12-31 | A kind of intelligent phase-selection switch and its control circuit based on power line carrier, PLC |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105305470A (en) * | 2015-08-07 | 2016-02-03 | 北京中电博达科技有限公司 | Low-voltage load balance adjustment device for power distribution network, and automatic phase-change switch |
| CN105552937A (en) * | 2015-12-25 | 2016-05-04 | 国家电网公司 | Power carrier technology-based load side phase identification method for three-phase four-wire system network |
| CN106130046A (en) * | 2016-08-25 | 2016-11-16 | 李建新 | A kind of AC three-phase load automatic-balancing system |
| CN106207652A (en) * | 2016-08-26 | 2016-12-07 | 张红 | A kind of Sparkless switch device and protection against electric shock smart jack |
| CN106211434A (en) * | 2016-07-17 | 2016-12-07 | 安徽卓越电气有限公司 | A kind of intelligent LED explosion-proof lamp drive circuit |
| CN110098627A (en) * | 2019-06-17 | 2019-08-06 | 重庆大全泰来电气有限公司 | A kind of commutation device, method, system and three-phase power balance method, system |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06269128A (en) * | 1993-03-11 | 1994-09-22 | Ngk Insulators Ltd | Power-supply-line changeover apparatus in three-phase distribution line |
| CN201733105U (en) * | 2010-08-02 | 2011-02-02 | 重庆雷尔斯科技有限公司 | Low-voltage intelligent phase-selection switch |
| CN201839007U (en) * | 2010-07-01 | 2011-05-18 | 山东卓尔电气有限公司 | Remote control automatic phase selecting switch |
| CN201860115U (en) * | 2010-06-28 | 2011-06-08 | 王海 | AC capacitor fling-cut switch circuit |
| CN202759250U (en) * | 2012-08-30 | 2013-02-27 | 万美蓉 | Rapid non-impact capacitance fling-cut switch for middling pressure reactive compensation |
| CN103259276A (en) * | 2013-06-04 | 2013-08-21 | 长沙高升电子电器科技有限公司 | Automatic intelligent power distribution system and power distribution method |
| CN103795076A (en) * | 2014-03-05 | 2014-05-14 | 贾继莹 | Three-phase load automatic balancer and phase changing device thereof |
-
2014
- 2014-12-31 CN CN201410856979.2A patent/CN104578117B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06269128A (en) * | 1993-03-11 | 1994-09-22 | Ngk Insulators Ltd | Power-supply-line changeover apparatus in three-phase distribution line |
| CN201860115U (en) * | 2010-06-28 | 2011-06-08 | 王海 | AC capacitor fling-cut switch circuit |
| CN201839007U (en) * | 2010-07-01 | 2011-05-18 | 山东卓尔电气有限公司 | Remote control automatic phase selecting switch |
| CN201733105U (en) * | 2010-08-02 | 2011-02-02 | 重庆雷尔斯科技有限公司 | Low-voltage intelligent phase-selection switch |
| CN202759250U (en) * | 2012-08-30 | 2013-02-27 | 万美蓉 | Rapid non-impact capacitance fling-cut switch for middling pressure reactive compensation |
| CN103259276A (en) * | 2013-06-04 | 2013-08-21 | 长沙高升电子电器科技有限公司 | Automatic intelligent power distribution system and power distribution method |
| CN103795076A (en) * | 2014-03-05 | 2014-05-14 | 贾继莹 | Three-phase load automatic balancer and phase changing device thereof |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105305470A (en) * | 2015-08-07 | 2016-02-03 | 北京中电博达科技有限公司 | Low-voltage load balance adjustment device for power distribution network, and automatic phase-change switch |
| CN105552937A (en) * | 2015-12-25 | 2016-05-04 | 国家电网公司 | Power carrier technology-based load side phase identification method for three-phase four-wire system network |
| CN106211434A (en) * | 2016-07-17 | 2016-12-07 | 安徽卓越电气有限公司 | A kind of intelligent LED explosion-proof lamp drive circuit |
| CN106130046A (en) * | 2016-08-25 | 2016-11-16 | 李建新 | A kind of AC three-phase load automatic-balancing system |
| CN106130046B (en) * | 2016-08-25 | 2018-08-14 | 李建新 | A kind of AC three-phase load automatic-balancing system |
| CN106207652A (en) * | 2016-08-26 | 2016-12-07 | 张红 | A kind of Sparkless switch device and protection against electric shock smart jack |
| CN106207652B (en) * | 2016-08-26 | 2020-03-31 | 张红 | Sparkless switch device and electric shock prevention intelligent socket |
| CN110098627A (en) * | 2019-06-17 | 2019-08-06 | 重庆大全泰来电气有限公司 | A kind of commutation device, method, system and three-phase power balance method, system |
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| CN104578117B (en) | 2018-02-13 |
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Effective date of registration: 20230614 Address after: 518000 Nanshan Nanyou No.1 Industrial Zone, Shenzhen, Guangdong Province, 107 buildings and 3 floors Patentee after: Shenzhen Longdian Huaxin Holding Group Co.,Ltd. Address before: Room 402, Building 7, No. 18 Anningzhuang East Road, Qinghe, Haidian District, Beijing, 100085 Patentee before: CHINA ELECTRIC BODA TECHNOLOGY Co.,Ltd. |