CN102623954A - Intelligently controlled protector - Google Patents
Intelligently controlled protector Download PDFInfo
- Publication number
- CN102623954A CN102623954A CN2011104556249A CN201110455624A CN102623954A CN 102623954 A CN102623954 A CN 102623954A CN 2011104556249 A CN2011104556249 A CN 2011104556249A CN 201110455624 A CN201110455624 A CN 201110455624A CN 102623954 A CN102623954 A CN 102623954A
- Authority
- CN
- China
- Prior art keywords
- cpu
- circuit
- current
- resistance
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention relates to an intelligently controlled protector. A control circuit of the intelligently controlled protector comprises a current sampling circuit, a current amplification shaping circuit, a voltage detecting circuit, a trip driving circuit, a CPU (central processing unit) and a switching power circuit. Voltage signals detected by the voltage detecting circuit are inputted to the CPU; after leakage current signals acquired by a zero sequence current transformer are amplified and shaped, alternating-current signals of the leakage current signals are inputted to the CPU, and direct-current signals of the leakage current signals are inputted to the CPU after being rectified and filtered; and after load current signals are amplified and shaped, alternating-current signals of the load current signals are inputted to the CPU, and direct-current signals of the load current signals are inputted to the CPU after being rectified and filtered. The intelligently controlled protector is provided with the unique control circuit, the industrial-grade CPU is used as the central processing unit of the protector, and the intelligently controlled protector has the advantages of ultra-small size, complete functions, high interference resistance, super-low power consumption and the like. By the aid of the design of a small number of peripheral components and a unique switching power supply with low power consumption, the intelligently controlled protector is attractive, small and exquisite, and meets the standard of American 'energy star'.
Description
Technical field
The present invention relates to a kind of low-voltage electrical apparatus, relate in particular to a kind of Based Intelligent Control formula protector.
Background technology
Along with the continuous development of technology, domestic low-voltage electrical apparatus also develops towards intelligent, environment-friendly type, low-power consumption direction gradually.In household appliance technical field, especially for some intermittently electricity consumptions, and the very big power consumption equipment of stand-by time power consumption; Such as air-conditioning, television set etc., their stand-by time is often long, more existing intelligent low-pressure electrical equipment and their supporting uses on the market; But because the cause of circuit design, these intelligent low-pressure electrical equipment are when holding state, and power consumption is than higher; Increase user's power consumption on the contrary, also had influence on the life-span of power consumption equipment.Therefore we develop a low-power consumption Based Intelligent Control formula protector in the hope of filling up the blank in market, satisfy and reach green, energy-conservation, reductions of discharging needs.
Summary of the invention
The objective of the invention is to overcome the defective of prior art, provide extra small, intelligent degree height of a kind of volume and stand-by power consumption very low a Based Intelligent Control formula protector, fill a hole in the market.
For realizing above-mentioned purpose; The present invention adopts a kind of Based Intelligent Control formula protector; Comprise base and be arranged on installation cover plate on the base, one and cover plate is installed is matched and cover and be located at the face frame on the installation cover plate and be installed in the interior load module on the mount pad; Interior load module comprises and offers the through hole that can supply lead to get on control circuit, input terminal assembly, output terminal assembly, moving contact group, fixed contact group, detection of electrical leakage assembly, the face frame; Cover plate is installed is provided with the exposed wire area that matches with output terminal assembly, the wire area position is corresponding with the lead to the hole site on the face frame, constitutes a kind of lead from through hole entering and the lead connection mode that is electrically connected at exposed wire area with output terminal assembly; The input terminal assembly links to each other with the moving contact group; Three output terminal assemblies link to each other with the fixed contact group, are in contact with one another/separate through dynamic and static sets of contacts to constitute energising of Based Intelligent Control formula protector or dead electricity, and control circuit comprises current sampling circuit, electric current amplification integeral type circuit, voltage detecting circuit, dropout drive circuit, CPU and switching power circuit; Input to CPU by the detected voltage signal of voltage detecting circuit; The leakage current signal of being obtained by zero sequence current mutual inductor is after amplifying shaping, and its AC signal inputs to CPU, and direct current signal inputs to CPU after through rectifying and wave-filtering; Load current signal is after amplifying shaping, and its AC signal inputs to CPU, and direct current signal inputs to CPU after through rectifying and wave-filtering.
The present invention further is set to control circuit and also comprises remote control circuit and indication warning circuit, and remote control circuit all links to each other with CPU with the indication warning circuit.Wherein remote control circuit is to adopt by U
3The infrared radiation receiving circuit that POS1838 etc. form, it mainly is to accomplish the order that the user assigns through the instruction that receives IR remote controller.
The present invention further is set to current sampling circuit and comprises by zero sequence current mutual inductor L2 summation current transformer L4.The primary current of current transformer is a load current, can accomplish 40B even bigger as required, and the secondary current of instrument transformer is 5mB, is convenient to the control analysis of microprocessor.
The present invention further is set to the electric current amplification integeral type circuit and comprises and decide current potential resistance R 12, R19; Operational amplifier U2A, U2B; Rectifier diode D3, D5; The integer circuit of forming by resistance R 5, R13, R7, R20 and capacitor C 5, C7, the filtering shaping circuit of forming by resistance R 14, R21 and capacitor C 6, C8.Sampling current through to secondary loop of mutual inductor amplifies, integer; One the road directly gets into CPU from PL2, PL0 output AC signal; One the tunnel carries out sending into after rectification, the filtering CPU to signal again carries out B/D conversion, mathematical computations, logic analysis and I/O output.
The present invention further is set to voltage detecting circuit and comprises piezo-resistance JRV, resistance R 9; Precision photoelectric coupler U1, current-limiting resistance R8; From the electricity consumption wireline inspection to the variation of AC voltage signal deliver to microprocessor CPU through precision photoelectric coupler by V; Carry out logic analysis, mathematical computations according to detected information, with the working condition that realizes that multi-functional indication and judgment processing are current.
The present invention's drive circuit that further is set to thread off comprises current-limiting resistance R10, R11, R15, R16, R17, R18, photoelectricity bidirectional triode thyristor driver Q2, Q3 and controllable silicon Q4, Q5.
The present invention further is set to switching power circuit again and comprises bridge rectifier block ZL, capacitance-resistance filter R3, C4, R2, C2, R1, C1; Diode D1, D2, D7; Voltage-stabiliser tube Q1, D4; Magnetic amplifier B1, its maximum characteristics are to exchange once for a short time of 0.2mA, and the voltage stabilizing D.C. capacity of output satisfies the requirement of system fully.
The present invention further is set to indicate warning circuit to comprise reset switch K2, signal processor U3, spacing diode D6, light-emitting diode Q6, buzzer LS and location resistance R 22, crystal amplifier Q6.
Connect in the following manner between the above circuit: switching power circuit is from BC 50Hz
220V obtains voltage with electric line, after the shaping of ZL rectifying and wave-filtering, exports D.C. regulated power supply through the voltage-stabilizing system of being made up of Q1, B1, D4 by the VCC end, and the working power of each control circuit is provided.By the detected voltage signal in voltage detecting loop; It reflects size, the phase place of alternating voltage, by the 3 pin entering of microprocessor CPU, changes through B/D; Participate in the analytical calculation of CPU, with the demonstration that draws voltage, power, power factor and the output of relevant dropout guard signal.
Take out zero sequence current signal through amplification, shaping by zero sequence current mutual inductor L2,1,2 pin by PL2, PL3 export CPU to participate in the analytical calculation of CPU, with the output of decision electric leakage trip signal.
Take out load current signal through amplifying, export to by PL0, PL1 after the shaping 20,19 pin of CPU by current transformer L4; Reflect the relevant information of load current; Participate in the analytical calculation of CPU, with the demonstration that draws electric current, power, power factor and the output of relevant guard signal.
According to various voltages, current signal by the CPU analytical calculation after; When needs carry out load dropout protection; Promptly input to 2 pin of photoelectricity bidirectional triode thyristor driver Q2, Q3 in the dropout drive circuit through 17,18 pin; The break-make of the TD through Q2, Q3, SD control utmost point control controllable silicon major loop, its output voltage is connected to the coil of load release through L, N, with rapid dropout; 10 pin GND by CPU output signal to the indication warning circuit simultaneously, and signal inputs to LS through amplification and sends audible warning, send the photoelectric alarm signal by D8 simultaneously, and caution relevant personnel load circuit breaks down.
The present invention adopts technical grade CPU as this machine central processing unit, and it has ultra-small volume, characteristics such as powerful and strong anti-interference and super low-power consumption.Add the design of small number of peripheral components and parts and unique low power consumption Switching Power Supply, constitute the Based Intelligent Control formula protector that small and exquisite exquisiteness attractive in appearance meets U.S.'s " Energy Star " standard.
Maximum power dissipation was 0.5 watt when the present invention used on 220 volts or 110 volts of power supplys, and stand-by power consumption is less than 0.1 watt.The present invention as an energy pass on switch its output rated current big, it is useful for the middle low power occasion of 220 volts or the 110 volts power supplys that are useful on.Especially for some intermittently electricity consumptions; And the power consumption equipment that the stand-by time power consumption is very big is a very practical product such as air-conditioning, refrigerator, and it not only can practice thrift considerable electric weight every year; Reduce the power consumption equipment standby working time simultaneously, prolonged power consumption equipment useful life.When power consumption equipment was not worked, this product thoroughly broke off power supply and power consumption equipment, thereby made the person of power utilization environment occasion and power consumption equipment safer.The design of hommization also is another big characteristics of the present invention; It can adopt timing automatic control mode and remote controller control mode; Make things convenient for different user to whether have the people or unmanned the time, can reach equally power consumption equipment is normally used, and obtain same energy-saving effect.
Description of drawings
Fig. 1 is an embodiment of the invention stereogram.
Fig. 2 is an embodiment of the invention front view.
Fig. 3 is an embodiment of the invention upward view.
Fig. 4 is an embodiment of the invention rearview.
Fig. 5 is an embodiment of the invention Facad structure exploded view.
Fig. 6 is an embodiment of the invention polycrystalline substance exploded view.
Fig. 7 is that face frame master TV structure sketch map is removed in embodiment of the invention front.
Fig. 8 is that face mount structure sketch map is removed in embodiment of the invention front.
Fig. 9 is an embodiment of the invention control circuit functional-block diagram.
Figure 10 is an embodiment of the invention schematic circuit.
Embodiment
Shown in Fig. 1-10; Specific embodiment of the present invention is a kind of Based Intelligent Control formula protector; Comprise base 1 and be arranged on installation cover plate 2 on the base 1, one and cover plate 2 is installed is matched and merge lid and be located at face frame 3 and the interior load module on the mount pad 7 on the installation cover plate 2; Interior load module comprises control circuit a, dynamic and static sets of contacts, insulated substrate, detection of electrical leakage assembly, SR assembly, testing button assembly, input terminal assembly, output terminal assembly 4; Offer the through hole 31 that can supply lead to get on the face frame 3; Cover plate 2 is installed is provided with the exposed wire area 5 that matches with output terminal assembly 4, wire area 5 positions are corresponding with through hole 31 positions on the face frame 3, constitute a kind of lead from through hole 31 entering and the lead connection mode that is electrically connected at exposed wire area 5 with output terminal assembly 4.The input terminal assembly links to each other with the moving contact group through copper conductor, and three output terminal assemblies 4 link to each other with the fixed contact group through copper conductor, is in contact with one another/separates energising of formation earth leakage protective device or dead electricity through dynamic and static sets of contacts.
Control circuit a wherein comprises current sampling circuit a1, electric current amplification integeral type circuit a2, voltage detecting circuit a3, dropout drive circuit a6, indication warning circuit a4, CPU, remote control circuit and switching power circuit a5; Input to CPU by the detected voltage signal of voltage detecting circuit a3; The leakage current signal of being obtained by zero sequence current mutual inductor is after amplifying shaping; Its AC signal inputs to CPU, and direct current signal inputs to CPU after through rectifying and wave-filtering; Load current signal is after amplifying shaping, and its AC signal inputs to CPU, and direct current signal inputs to CPU after through rectifying and wave-filtering.
Current sampling circuit a1 comprises by zero sequence current mutual inductor L2 summation current transformer L4.The primary current of current transformer is a load current, can accomplish 40B even bigger as required, and the secondary current of instrument transformer is 5mB, is convenient to the control analysis of microprocessor.
Electric current amplification integeral type circuit a2 comprises and decides current potential resistance R 12, R19; Operational amplifier U2A, U2B; Rectifier diode D3, D5, the integer circuit of forming by resistance R 5, R13, R7, R20 and capacitor C 5, C7, the filtering shaping circuit of forming by resistance R 14, R21 and capacitor C 6, C8.Sampling current through to secondary loop of mutual inductor amplifies, integer; One the road directly gets into CPU from PL2, PL0 output AC signal; One the tunnel carries out sending into after rectification, the filtering CPU to signal again carries out B/D conversion, mathematical computations, logic analysis and I/O output.
Voltage detecting circuit a3 comprises piezo-resistance JRV, resistance R 9; Precision photoelectric coupler U1, current-limiting resistance R8; From the electricity consumption wireline inspection to the variation of AC voltage signal deliver to microprocessor CPU through precision photoelectric coupler by V; Carry out logic analysis, mathematical computations according to detected information, with the working condition that realizes that multi-functional indication and judgment processing are current.
Dropout drive circuit a6 comprises current-limiting resistance R10, R11, R15, R16, R17, R18, photoelectricity bidirectional triode thyristor driver Q2, Q3 and controllable silicon Q4, Q5.
Indication warning circuit a4 comprises reset switch K2, signal processor U3, spacing diode D6, light-emitting diode Q6, buzzer LS and location resistance R 22, crystal amplifier Q6.
Switching power circuit a5 comprises bridge rectifier block ZL, capacitance-resistance filter R3, C4, R2, C2, R1, C1; Diode D1, D2, D7, voltage-stabiliser tube Q1, D4, magnetic amplifier B1; Its maximum characteristics are to exchange once for a short time of 0.2mA, and the voltage stabilizing D.C. capacity of output satisfies the requirement of system fully.
Wherein remote control circuit is to adopt the infrared radiation receiving circuit of being made up of U3POS1838 etc., and it mainly is to accomplish the order that the user assigns through the instruction of reception IR remote controller.
Switching power circuit a5 provide D.C. regulated power supply, supplies the usefulness of the power supply of each control circuit of protector.
A1 obtains zero sequence current signal through L3 by current sampling circuit; Zero sequence current signal is after operational amplifier U2A amplification and R5, R13, C5 shaping, and a route PL2 output AC is to 1 pin of CPU, and one the tunnel through the D3 rectification; Export 2 pin of CPU behind R14, the C6 shaping filter to by PL3; Leakage control signal is provided, after the A/D conversion, carries out analytical calculation, export various demonstrations and control signal.Protector is obtained load current signal through L4, and this signal amplifies through operational amplifier U2A, R7, R20, C7 shaping; One route PL0 output AC signal is to 19 pin of CPU; One the tunnel through the D5 rectification, is exported to 20 pin of CPU behind R21, the C8 shaping filter by PL1, and size, the phase information of load current is provided; Through the CPU analytical calculation, export various demonstrations and control signal.
Obtain voltage signal by voltage detecting circuit a3 through thermistor JRV, resistance R 9; The size of this signal, phase place and current variation of AC voltage value are taken out 3 pin that signal is delivered to microprocessor CPU through photoelectrical coupler U2; Carry out logic analysis, mathematical computations according to detected data, export various demonstrations and control signal.
Input to 3 pin of CPU according to the detected voltage signal of voltage detecting circuit a3 from V, zero sequence current signal is through amplification and rectification circuit a3, and its AC signal inputs to 1 pin of CPU by PL2, inputed to 2 pin of CPU by PL3 through the direct current signal of rectifying and wave-filtering shaping; And load current signal is through amplification and rectification circuit a3; Its AC signal is inputed to 19 pin of CPU by PL0; Input to 20 pin of CPU by PL1 through the direct current signal of rectifying and wave-filtering shaping; These reflections are carried out analytical calculation with electric current, the information of voltage of electric loading through microprocessor CPU; Confirm that load is leaked electricity, overload, short circuit etc. are with behind the electric fault, by 2 pin of 17, the 18 pin output control trip signal of CPU photoelectricity bidirectional triode thyristor driver Q2, Q3 to the drive circuit a6 that threads off, export through the voltage of the control utmost point TD of Q2, Q3, SD control controllable silicon Q4, Q5; Through the coil voltage of L, N control load release, thus the rapid dropout of control load release; While is by 3,2 pin of U3 among 8,10 pin output alarm signal to the sound equipment indicating circuit a4 of CPU; Promoting alarm LS sends audible alarm on the one hand after the Q6 processing and amplifying; Light-emitting diode sends caution photoelectric alarm signal simultaneously, and caution relevant personnel load circuit breaks down.
CPU leaves a plurality of empty pin, in order to the various functions of expansion multifunctional electric leakage protector, like functions such as electric current, voltage, power, power factor, the isoparametric demonstration of power consumption and Remotes.
Claims (10)
1. Based Intelligent Control formula protector; Comprise base and be arranged on installation cover plate on the base, one and cover plate is installed is matched and cover and be located at the face frame on the installation cover plate and be installed in the interior load module on the mount pad; Interior load module comprises and offers the through hole that can supply lead to get on control circuit, input terminal assembly, output terminal assembly, moving contact group, fixed contact group, detection of electrical leakage assembly, the face frame; Cover plate is installed is provided with the exposed wire area that matches with output terminal assembly; The wire area position is corresponding with the lead to the hole site on the face frame; Constitute the lead connection mode that a kind of lead gets into and is electrically connected at exposed wire area with output terminal assembly from through hole, the input terminal assembly links to each other with the moving contact group, and three output terminal assemblies link to each other with the fixed contact group; Be in contact with one another/separate protector energising of formation Based Intelligent Control formula or dead electricity through dynamic and static sets of contacts; It is characterized in that: control circuit comprises current sampling circuit, electric current amplification integeral type circuit, voltage detecting circuit, dropout drive circuit, CPU and switching power circuit, inputs to CPU by the detected voltage signal of voltage detecting circuit, and the leakage current signal of being obtained by zero sequence current mutual inductor is after amplifying shaping; Its AC signal inputs to CPU, and direct current signal inputs to CPU after through rectifying and wave-filtering; Load current signal is after amplifying shaping, and its AC signal inputs to CPU, and direct current signal inputs to CPU after through rectifying and wave-filtering.
2. Based Intelligent Control formula protector according to claim 1 is characterized in that: described control circuit also comprises remote control circuit and indication warning circuit, and remote control circuit all links to each other with CPU with the indication warning circuit.
3. Based Intelligent Control formula protector according to claim 1 and 2 is characterized in that: described current sampling circuit comprises by zero sequence current mutual inductor L2 summation current transformer L4.
4. Based Intelligent Control formula protector according to claim 1 and 2; It is characterized in that: said electric current amplification integeral type circuit comprises decides current potential resistance R 12, R19; Operational amplifier U2A, U2B; Rectifier diode D3, D5, the integer circuit of forming by resistance R 5, R13, R7, R20 and capacitor C 5, C7, the filtering shaping circuit of forming by resistance R 14, R21 and capacitor C 6, C8.Sampling current through to secondary loop of mutual inductor amplifies, integer; One the road directly gets into CPU from PL2, PL0 output AC signal; One the tunnel carries out sending into after rectification, the filtering CPU to signal again carries out B/D conversion, mathematical computations, logic analysis and I/O output.
5. Subminature multifunctional earth leakage protective device control circuit according to claim 1 and 2; It is characterized in that: described voltage detecting circuit comprises piezo-resistance JRV, resistance R 9; Precision photoelectric coupler U1, current-limiting resistance R8; From the electricity consumption wireline inspection to the variation of AC voltage signal deliver to microprocessor CPU through precision photoelectric coupler by V, carry out logic analysis, mathematical computations according to detected information, with the working condition that realizes that multi-functional indication and judgment processing are current.
6. Subminature multifunctional earth leakage protective device control circuit according to claim 3; It is characterized in that: described voltage detecting circuit comprises piezo-resistance JRV, resistance R 9; Precision photoelectric coupler U1, current-limiting resistance R8; From the electricity consumption wireline inspection to the variation of AC voltage signal deliver to microprocessor CPU through precision photoelectric coupler by V, carry out logic analysis, mathematical computations according to detected information, with the working condition that realizes that multi-functional indication and judgment processing are current.
7. Based Intelligent Control formula protector according to claim 1 and 2 is characterized in that: said dropout drive circuit comprises current-limiting resistance R10, R11, R15, R16, R17, R18, photoelectricity bidirectional triode thyristor driver Q2, Q3 and controllable silicon Q4, Q5.
8. Based Intelligent Control formula protector according to claim 1 and 2; It is characterized in that: said switching power circuit comprises bridge rectifier block ZL, capacitance-resistance filter R3, C4, R2, C2, R1, C1; Diode D1, D2, D7, voltage-stabiliser tube Q1, D4, magnetic amplifier B1.
9. Based Intelligent Control formula protector according to claim 3 is characterized in that: said switching power circuit comprises bridge rectifier block ZL, capacitance-resistance filter R3, C4, R2, C2, R1, C1, diode D1, D2, D7, voltage-stabiliser tube Q1, D4, magnetic amplifier B1.
10. Based Intelligent Control formula protector according to claim 1 and 2 is characterized in that: said indication warning circuit comprises reset switch K2, signal processor U3, spacing diode D6, light-emitting diode Q6, buzzer LS and location resistance R 22, crystal amplifier Q6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104556249A CN102623954A (en) | 2011-12-31 | 2011-12-31 | Intelligently controlled protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104556249A CN102623954A (en) | 2011-12-31 | 2011-12-31 | Intelligently controlled protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102623954A true CN102623954A (en) | 2012-08-01 |
Family
ID=46563699
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011104556249A Pending CN102623954A (en) | 2011-12-31 | 2011-12-31 | Intelligently controlled protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102623954A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105490246A (en) * | 2015-12-22 | 2016-04-13 | 张正怡 | Electric leakage protection device for AC polarity correction and control method of electric leakage protection device |
| CN111640604A (en) * | 2020-05-28 | 2020-09-08 | 新驰电气集团有限公司 | Low-power-consumption control and protection switching device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2106432U (en) * | 1991-10-14 | 1992-06-03 | 沈阳市三思工业电器研究所 | High voltage combined protection relay device |
| CN101420116A (en) * | 2008-12-04 | 2009-04-29 | 临安亿安电子有限公司 | Intelligent integrated electricity leakage protection device |
| CN201699144U (en) * | 2010-06-20 | 2011-01-05 | 浙江路美思电气有限公司 | Wiring type leakage protection socket |
| CN202424122U (en) * | 2011-12-31 | 2012-09-05 | 浙江路美思电气有限公司 | Intelligent control type protector |
-
2011
- 2011-12-31 CN CN2011104556249A patent/CN102623954A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2106432U (en) * | 1991-10-14 | 1992-06-03 | 沈阳市三思工业电器研究所 | High voltage combined protection relay device |
| CN101420116A (en) * | 2008-12-04 | 2009-04-29 | 临安亿安电子有限公司 | Intelligent integrated electricity leakage protection device |
| CN201699144U (en) * | 2010-06-20 | 2011-01-05 | 浙江路美思电气有限公司 | Wiring type leakage protection socket |
| CN202424122U (en) * | 2011-12-31 | 2012-09-05 | 浙江路美思电气有限公司 | Intelligent control type protector |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105490246A (en) * | 2015-12-22 | 2016-04-13 | 张正怡 | Electric leakage protection device for AC polarity correction and control method of electric leakage protection device |
| CN105490246B (en) * | 2015-12-22 | 2017-12-12 | 佛山市顺德区凌晨电器有限公司 | A kind of alternating electrical polarity correction earth leakage protective device and control method |
| CN111640604A (en) * | 2020-05-28 | 2020-09-08 | 新驰电气集团有限公司 | Low-power-consumption control and protection switching device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR20140053297A (en) | Energy efficient inductive power transmission system and method | |
| WO2001084521A2 (en) | Apparatus and method for traffic signal flash mode during power outages | |
| CN208209824U (en) | Bluetooth audio device power supply device | |
| CN201886304U (en) | Intelligent switch module and intelligent switch | |
| CN102545388A (en) | Intelligent controller of permanent magnet mechanism breaker | |
| CN203434652U (en) | Medical device based on wireless charging | |
| CN204205306U (en) | Based on the Domestic distributing box of mobile module remote monitoring | |
| CN209562512U (en) | A kind of photovoltaic system and detection system | |
| CN110829372A (en) | Intelligent anti-harmonic-eliminating PT comprehensive protection device and protection method thereof | |
| CN102623954A (en) | Intelligently controlled protector | |
| CN202424122U (en) | Intelligent control type protector | |
| CN111829675A (en) | Temperature measuring device of power distribution network monitoring system | |
| CN110161328A (en) | A kind of platform area power quality integritied monitoring and controling system of coastal area and high peak-valley difference | |
| CN208210264U (en) | Duplicate supply formula Bluetooth audio device power supply device | |
| CN202696482U (en) | Power supply circuit for leakage circuit breaker | |
| CN201993879U (en) | Wireless fault alarm of digital cables | |
| CN115021382A (en) | USB power management system and charging cabinet | |
| CN210536489U (en) | Improved adapter circuit | |
| CN103904715A (en) | Wall-in intelligent USB charging socket | |
| CN207426673U (en) | The hardware circuit of control and protective switch equipment | |
| CN206117161U (en) | Electric installation is got in electric current mutual inductance | |
| CN207380824U (en) | Possess the sale of electricity charging terminal and system of wireless charging function | |
| CN109980620A (en) | A kind of protective relaying device with change relay parameter function | |
| CN205827206U (en) | A kind of automatic acquisition control system of electric quantity data | |
| CN205786881U (en) | A kind of electric instrument |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120801 |