CN102158099B - Remote control constant current source with phase selection connection function and control method - Google Patents
Remote control constant current source with phase selection connection function and control method Download PDFInfo
- Publication number
- CN102158099B CN102158099B CN 201110007190 CN201110007190A CN102158099B CN 102158099 B CN102158099 B CN 102158099B CN 201110007190 CN201110007190 CN 201110007190 CN 201110007190 A CN201110007190 A CN 201110007190A CN 102158099 B CN102158099 B CN 102158099B
- Authority
- CN
- China
- Prior art keywords
- output
- power supply
- transformer
- current source
- current
- 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.)
- Expired - Fee Related
Links
Images
Classifications
-
- 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/40—Display of information, e.g. of data or controls
Landscapes
- Control Of Electrical Variables (AREA)
Abstract
The invention relates to a remote control constant current source with the phase selection connection function and a control method. The remote control constant current source is characterized by comprising an industrial control computer, an industrial touch display screen and a current-stabilizing power supply, wherein the industrial touch display screen is connected with the industrial control computer through a matching cable; and the current-stabilizing power supply comprises a switching power supply, a signal processing unit, a thyristor control unit, an output transformer and a constant current source circuit. When the performances of a circuit breaker are detected, the detected circuit breaker can be prevented from detaching from a dispersed power distribution loop, thereby greatly saving manpower, physical resources and financial resources; the constant current source can realize remote control and solve the status quo that a vehicle can not enter the using scene; furthermore, the constant current source has the phase selection connection function, precise current is provided for short-circuit breaking testing of part of the circuit breaker, and whether breaking time of the circuit breaker is reasonable or not can be judged correctly.
Description
Technical field
The invention belongs to a kind of breaker test stand, particularly relate to a kind of with choosing be connected control constant-current source far away and the control method of function.
Background technology
Low-voltage electrical apparatus is the base components of mechanical industry, and the Performance and quality of its product directly affects the reliability service of electric power system and industrial control system.Common product will move after putting into operation always continuously, and the Shi Caihui that only breaks down detects it.But special sector is as regular testing product performance all such as space flight, army, and in time changes problematic circuit breaker.At present, circuit breaker can only be taken out from distribution loop, transport in the laboratory and regularly detect.And after in a single day circuit breaker be installed in the power distribution cabinet, it all was very difficult unloading with installing; The wink dynamic test of part switch need to be examined at the stationary phase plugged short circuit breaking capacity of circuit breaker, but the power-supply device of ordinary test chamber does not have this function, wink, dynamic test can't carry out according to the requirement of national standard fully, can not make accurate judgment.
Summary of the invention
The present invention provides a kind of need not that circuit breaker is unloaded for solving the technical problem that exists in the known technology, just the use Site Detection, can be remote operated with choosing be connected control constant-current source far away and the control method of function.
The technical scheme that the present invention takes for the control constant-current source far away of the function that is connected with choosing for the technical problem that exists in the solution known technology is: it includes an industrial control computer, an industrial touch display and a stabilized current power supply; Described industrial touch display links to each other with described industrial control computer by supporting cable; Described stabilized current power supply includes: Switching Power Supply, signal processing unit, thyristor control unit, output transformer and constant-current source circuit; AC 220 V is industrial control computer, and the 3rd transformer (T3) and the described Switching Power Supply of described industrial touch display, described thyristor control unit provide input power; Switching Power Supply produces positive 5V, the GND power supply; Have two groups of identical circuit in the described thyristor control unit: namely by two groups of described the 3rd transformer (T3) outputs independently first, second exchanges 24 volts of power supply (A1, A2), described first, second exchanges 24 volts of power supply (A1, A2) access respectively again by the first～the 4th diode (D1～D4), the the 5th～the 8th diode (D5～D8) form first, the second rectification circuit, described the first rectification circuit rectification is output as the first DC power supply of DC24V and GND1, seals in behind the second current-limiting resistance (R2) in parallel with the 9th voltage-stabiliser tube (D9) again behind described the first DC power supply and the first electric capacity (C1) parallel filtering again; Described the second rectification circuit rectification is output as the second DC power supply of DC24V and GND2, seals in behind the 4th current-limiting resistance (R4) in parallel with the tenth voltage-stabiliser tube (D10) again behind described the second DC power supply and the second electric capacity (C2) parallel filtering again; One end of described the 9th, the tenth voltage-stabiliser tube (D9, D10) respectively correspondence is received the collector electrode of first, second optocoupler (U1, U2), and the emitter of described first, second optocoupler (U1, U2) is received corresponding first, second control end (G1, G2) of first, second thyristor (Q1, Q2) of described constant-current source circuit; First, second negative electrode (K1, K2) that described first, second thyristor (Q1, Q2) is corresponding is received GND1, the GND2 of described first, second DC power supply output; Described signal processing unit input 1,2 is received respectively the two ends (T1-1, T1-2) of the first transformer (T1) secondary; Described signal processing unit input 3,4 is received respectively the two ends (C1, C2) of the first current transformer (CT1); Described signal processing unit output 5,6 connects with described industrial control computer input 1,2; Described industrial control computer output port 3,4 are connected in series respectively the anode that accesses respectively more described first, second optocoupler (U1, U2) behind the first, the 3rd current-limiting resistance (R1, R3), and the negative electrode of described first, second optocoupler (U1, U2) meets GND; Described industrial control computer output port 5,6 is controlled respectively rotating and reverse of motor (M), and then changes the secondary coil position of voltage regulator (TV1); The former edge joint of described voltage regulator (TV1) exchanges the 380V power supply, and described voltage regulator (TV1) secondary is as the former limit input of the first transformer (T1); The negative electrode of the anode of the first thyristor (Q1) and the second thyristor (Q2) is connected to an end of described voltage regulator (TV1) secondary, and the negative electrode of the first thyristor (Q1) and the second thyristor (Q2) anode are connected to an output (TV1-1) of described constant-current source circuit; The two ends (T2-1, T2-2) on the former limit of output transformer (T2) and an output (TV1-1) of described constant-current source circuit be connected another output (TV1-2) that the other end of voltage regulator (TV1) secondary is described constant-current source circuit and be connected; The secondary of output transformer (T2) seals in detected circuit breaker (K1) and the first current transformer (CT1).
The present invention for solving the technical problem that exists in the known technology for described with the choosing technical scheme that the control method of control constant-current source far away of function takes that is connected is:
To install onboard with the be connected control constant-current source far away of function of choosing, the detected circuit breaker (K1) that described output transformer (T2) is moved on to dispersion uses on-the-spot, the holding wire of selecting appropriate length according to distance is connected an output (TV1-1) of described constant-current source circuit with an end (T2-1) on the former limit of output transformer (T2), another output (TV1-2) of described constant-current source circuit is connected with the other end on the former limit of output transformer (T2); Closed on-the-spot detected circuit breaker (K1), the user test is set onboard with the output current size and after connecting phase place, its control step is as follows:
(1). judge whether to set test with output current size and phase place, then do not continue to wait for if set;
(2). industrial control computer control output end mouth 6 control motors (M) counter-rotating makes described voltage regulator (TV1) secondary adjust to 0.2 times of full scale; By industrial control computer output port 3,4 output high level are controlled first, second optocoupler (U1, U2) work, and then so that first, second thyristor (Q1, Q2) work conducting, connect major loop, signal processing unit gathers the secondary signal of the first current transformer (CT1) and the first transformer (T1), be input to 1,2 port of industrial control computer after processing by 5,6 ports;
(3). record synchronization the first current transformer (CT1) and the phase difference of the first transformer (T1), and this phase difference is converted into time t under the power frequency 50Hz; Calculate to set simultaneously test with the multiple of output current and current actual current, and this multiple and voltage regulator (TV1) secondary voltage multiplied each other obtain voltage regulator (TV1) secondary purpose voltage u; Then control first, second optocoupler (U1, U2) by industrial control computer output port 3,4 output low levels and quit work, and then so that first, second thyristor (Q1, Q2) work cut-off disconnects major loop;
(4). control motor forward or reverse makes voltage regulator (TV1) secondary adjust to purpose voltage u, if the voltage u that do not achieve the goal then continues to adjust;
(5) if. voltage u has achieved the goal, then to the first transformer (T1) secondary signal real-time tracking, zero crossing at this signal begins timing, t exports high level and controls first, second optocoupler (U1, U2) work after the time, and then so that first, second thyristor (Q1, Q2) work conducting, connect major loop, detected circuit breaker (K1) can begin to carry out Performance Detection.
Advantage and good effect that the present invention has are: detect the circuit breaker performance, avoided being detected circuit breaker and unloaded from the distribution loop that disperses, saved a large amount of manpowers, material resources, financial resources; Constant-current source can be realized control far away, has solved to use the inaccessiable present situation of on-the-spot automobile; And constant-current source is with the choosing function that is connected, and for the short circuit breaking test of part circuit breaker provides accurate electric current, draws that the circuit breaker break-time is whether reasonably correct to be judged.
Description of drawings
Fig. 1 is circuit theory diagrams of the present invention;
Fig. 2 is control flow chart of the present invention.
Embodiment
For further understanding content of the present invention, Characteristic, hereby exemplify following examples, and cooperate accompanying drawing to be described in detail as follows:
As shown in Figure 1, industrial touch display links to each other with industrial control computer by supporting cable; Stabilized current power supply includes: Switching Power Supply, signal processing unit, thyristor control unit, output transformer and constant-current source circuit; AC 220 V is industrial control computer, and transformer T3 and the switch power module of industrial touch display, thyristor control unit provide input power; Switching Power Supply produces positive 5V, the GND power supply; Have two groups of identical circuit in the thyristor control unit: namely export two groups by transformer T3 and independently exchange 24 volts of power supply A1, A2; Exchange DC power supply that rectification circuit rectification that 24 volts of power supply A1 access is comprised of diode D1～D4 exports DC24V and GND1 and capacitor C 1 in parallel after, seal in again current-limiting resistance R2, be connected with voltage-stabiliser tube D9 between the other end of resistance R 2 and the GND1; Exchange DC power supply that rectification circuit rectification that 24 volts of power supply A2 access is comprised of diode D5～D8 exports DC24V and GND2 and capacitor C 2 in parallel after, seal in again current-limiting resistance R4, be connected with voltage-stabiliser tube D10 between the other end of resistance R 4 and the GND2; One of voltage-stabiliser tube D9 terminates to the collector electrode of optocoupler U1, and the emitter of optocoupler U1 is received the thyristor Q1 control end G1 of constant-current source output circuit; The negative electrode K1 of thyristor Q1 receives the GND1 of DC power supply output; One of voltage-stabiliser tube D10 terminates to the collector electrode of optocoupler U2, and the emitter of optocoupler U2 is received the thyristor Q2 control end G2 of constant-current source circuit; The negative electrode K2 of thyristor Q2 receives the GND2 of DC power supply output; Signal processing unit input 1,2 is received respectively the two ends T1-1 of transformer T1 secondary, T1-2; Signal processing unit input 3,4 is received respectively two ends C1, the C2 of Current Transmit 1; Adopt the integrated transporting discharging such as OP07 that the signal of input port 1,2 and 3,4 is zoomed into the equivalent signal that industrial control computer can be identified in the signal processing unit; Signal processing unit output 5,6 connects with industrial control computer input 1,2; Access the anode of two optocoupler U1 behind the industrial control computer output port KG1 serial connection current-limiting resistance R1, the negative electrode of optocoupler U1 meets GND again; Access the anode of two optocoupler U2 behind the industrial control computer output port KG2 serial connection current-limiting resistance R3, the negative electrode of optocoupler U2 meets GND again; Industrial control computer output port 5,6 is controlled respectively rotating and reverse of motor M, and then changes the secondary coil position of voltage regulator TV1; The former edge joint of voltage regulator TV1 exchanges the 380V power supply, and voltage regulator TV1 secondary is as the former limit input of transformer T1; The negative electrode of the anode of thyristor Q1 and thyristor Q2 is connected to an end of voltage regulator TV1 secondary, and the negative electrode of thyristor Q1 and thyristor Q2 anode are connected to an output TV1-1 of constant-current source circuit; The two ends T2-1 on the former limit of output transformer T2, T2-2 and an output TV1-1 of constant-current source circuit are connected another output TV1-2 that the other end is described constant-current source circuit and are connected with voltage regulator TV1 secondary; The secondary of output transformer T2 seals in detected circuit breaker K1 and the first Current Transmit 1.
As shown in Figure 2, to install onboard with the be connected control constant-current source far away of function of choosing, the detected circuit breaker K1 that described output transformer T2 is moved on to dispersion uses on-the-spot, the holding wire of selecting appropriate length according to distance is connected an output TV1-1 of described constant-current source circuit with an end T2-1 on the former limit of output transformer T2, another output TV1-2 of described constant-current source circuit is connected with the other end on the former limit of output transformer T2; Closed on-the-spot detected circuit breaker K1, user test are set onboard with the output current size and after connecting phase place, its control step is as follows:
(1). judge whether to set test with output current size and phase place, then do not continue to wait for if set;
(2). the 6 control motor M counter-rotatings of control industrial control computer output port make voltage regulator TV1 secondary adjust to 0.2 times of full scale; By industrial control computer output port 3,4 output high level control optocoupler U1, U2 work, and then so that thyristor Q1, Q2 work conducting, connect major loop, signal processing unit gathers the secondary signal of Current Transmit 1 and transformer T1, be input to 1,2 port of industrial control computer after processing by 5,6 ports;
(3). the phase difference of record synchronization Current Transmit 1 and the first transformer T1, and this phase difference is converted into time t under the power frequency 50Hz; Calculate to set simultaneously test with the multiple of output current and current actual current, and this multiple and voltage regulator TV1 secondary voltage multiplied each other obtain voltage regulator TV1 secondary purpose voltage u; Then quit work by industrial control computer output port 3,4 output low levels control optocoupler U1, U2, and then the cut-off so that thyristor Q1, Q2 work, major loop disconnected;
(4). control motor forward or reverse makes voltage regulator TV1 secondary adjust to purpose voltage u, if the voltage u that do not achieve the goal then continues to adjust;
(5) if. voltage u has achieved the goal, then to transformer T1 secondary signal real-time tracking, zero crossing at this signal begins timing, t exports high level control optocoupler U1, U2 work after the time, and then so that thyristor Q1, Q2 work conducting, connect major loop, detected circuit breaker K1 can begin to carry out Performance Detection.
Claims (2)
1. one kind with the be connected control constant-current source far away of function of choosing, and it is characterized in that: it includes an industrial control computer, an industrial touch display and a stabilized current power supply; Described industrial touch display links to each other with described industrial control computer by supporting cable; Described stabilized current power supply includes: Switching Power Supply, signal processing unit, thyristor control unit, output transformer and constant-current source circuit; AC 220 V is industrial control computer, and the 3rd transformer (T3) and the described Switching Power Supply of described industrial touch display, described thyristor control unit provide input power; Switching Power Supply produces positive 5V, the GND power supply; Have two groups of identical circuit in the described thyristor control unit: namely by two groups of described the 3rd transformer (T3) outputs independently first, second exchanges 24 volts of power supply (A1, A2), described first, second exchanges 24 volts of power supply (A1, A2) access respectively again by the first～the 4th diode (D1～D4), the the 5th～the 8th diode (D5～D8) form first, the second rectification circuit, described the first rectification circuit rectification is output as the first DC power supply of DC24V and GND1, seals in behind the second current-limiting resistance (R2) in parallel with the 9th voltage-stabiliser tube (D9) again behind described the first DC power supply and the first electric capacity (C1) parallel filtering again; Described the second rectification circuit rectification is output as the second DC power supply of DC24V and GND2, seals in behind the 4th current-limiting resistance (R4) in parallel with the tenth voltage-stabiliser tube (D10) again behind described the second DC power supply and the second electric capacity (C2) parallel filtering again; One end of described the 9th, the tenth voltage-stabiliser tube (D9, D10) respectively correspondence is received the collector electrode of first, second optocoupler (U1, U2), and the emitter of described first, second optocoupler (U1, U2) is received corresponding first, second control end (G1, G2) of first, second thyristor (Q1, Q2) of described constant-current source circuit; First, second negative electrode (K1, K2) that described first, second thyristor (Q1, Q2) is corresponding is received GND1, the GND2 of described first, second DC power supply output; Described signal processing unit input 1,2 is received respectively the two ends (T1-1, T1-2) of the first transformer (T1) secondary; Described signal processing unit input 3,4 is received respectively the two ends (C1, C2) of the first current transformer (CT1); Described signal processing unit output 5,6 connects with described industrial control computer input 1,2; Described industrial control computer output port 3,4 are connected in series respectively the anode that accesses respectively more described first, second optocoupler (U1, U2) behind the first, the 3rd current-limiting resistance (R1, R3), and the negative electrode of described first, second optocoupler (U1, U2) meets GND; Described industrial control computer output port 5,6 is controlled respectively rotating and reverse of motor (M), and then changes the secondary coil position of voltage regulator (TV1); The former edge joint of described voltage regulator (TV1) exchanges the 380V power supply, and described voltage regulator (TV1) secondary is as the former limit input of the first transformer (T1); The negative electrode of the anode of the first thyristor (Q1) and the second thyristor (Q2) is connected to an end of described voltage regulator (TV1) secondary, and the negative electrode of the first thyristor (Q1) and the second thyristor (Q2) anode are connected to an output (TV1-1) of described constant-current source circuit; The two ends (T2-1, T2-2) on the former limit of output transformer (T2) and an output (TV1-1) of described constant-current source circuit be connected another output (TV1-2) that the other end of voltage regulator (TV1) secondary is described constant-current source circuit and be connected; The secondary of output transformer (T2) seals in detected circuit breaker (K1) and the first current transformer (CT1).
One kind as claimed in claim 1 with the be connected control method of control constant-current source far away of function of choosing, it is characterized in that: will install onboard with the be connected control constant-current source far away of function of choosing, the detected circuit breaker (K1) that described output transformer (T2) is moved on to dispersion uses on-the-spot, the holding wire of selecting appropriate length according to distance is connected an output (TV1-1) of described constant-current source circuit with an end (T2-1) on the former limit of output transformer (T2), another output (TV1-2) of described constant-current source circuit is connected with the other end on the former limit of output transformer (T2); Closed on-the-spot detected circuit breaker (K1), the user test is set onboard with the output current size and after connecting phase place, its control step is as follows:
(1). judge whether to set test with output current size and phase place, then do not continue to wait for if set;
(2). industrial control computer output port 6 control motors (M) counter-rotating makes described voltage regulator (TV1) secondary adjust to 0.2 times of full scale; By industrial control computer output port 3,4 output high level are controlled first, second optocoupler (U1, U2) work, and then so that first, second thyristor (Q1, Q2) work conducting, connect major loop, signal processing unit gathers the secondary signal of the first current transformer (CT1) and the first transformer (T1), be input to 1,2 port of industrial control computer after processing by 5,6 ports;
(3). record synchronization the first current transformer (CT1) and the phase difference of the first transformer (T1), and this phase difference is converted into time t under the power frequency 50Hz; Calculate to set simultaneously test with the multiple of output current and current actual current, and this multiple and voltage regulator (TV1) secondary voltage multiplied each other obtain voltage regulator (TV1) secondary purpose voltage u; Then control first, second optocoupler (U1, U2) by industrial control computer output port 3,4 output low levels and quit work, and then so that first, second thyristor (Q1, Q2) work cut-off disconnects major loop;
(4). control motor forward or reverse makes voltage regulator (TV1) secondary adjust to purpose voltage u, if the voltage u that do not achieve the goal then continues to adjust;
(5) if. voltage u has achieved the goal, then to the first transformer (T1) secondary signal real-time tracking, zero crossing at this signal begins timing, t exports high level and controls first, second optocoupler (U1, U2) work after the time, and then so that first, second thyristor (Q1, Q2) work conducting, connect major loop, detected circuit breaker (K1) can begin to carry out Performance Detection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110007190 CN102158099B (en) | 2011-01-14 | 2011-01-14 | Remote control constant current source with phase selection connection function and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110007190 CN102158099B (en) | 2011-01-14 | 2011-01-14 | Remote control constant current source with phase selection connection function and control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102158099A CN102158099A (en) | 2011-08-17 |
| CN102158099B true CN102158099B (en) | 2013-04-24 |
Family
ID=44439340
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110007190 Expired - Fee Related CN102158099B (en) | 2011-01-14 | 2011-01-14 | Remote control constant current source with phase selection connection function and control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102158099B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7221548B2 (en) * | 2000-04-25 | 2007-05-22 | Siemens Aktiengesellschaft | Residual-current circuit breaker and a method for testing the reliability performance of a residual-current circuit breaker |
| CN101169468A (en) * | 2007-11-27 | 2008-04-30 | 天津市百利电气有限公司 | Board back insertion type circuit breaker characteristic detection and test device |
| CN201976008U (en) * | 2011-01-14 | 2011-09-14 | 尹超英 | Remote control constant current source with phase selection connecting function |
-
2011
- 2011-01-14 CN CN 201110007190 patent/CN102158099B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7221548B2 (en) * | 2000-04-25 | 2007-05-22 | Siemens Aktiengesellschaft | Residual-current circuit breaker and a method for testing the reliability performance of a residual-current circuit breaker |
| CN101169468A (en) * | 2007-11-27 | 2008-04-30 | 天津市百利电气有限公司 | Board back insertion type circuit breaker characteristic detection and test device |
| CN201976008U (en) * | 2011-01-14 | 2011-09-14 | 尹超英 | Remote control constant current source with phase selection connecting function |
Non-Patent Citations (1)
| Title |
|---|
| 高琴妹等.基于虚拟仪器技术的万能式断路器检测系统设计.《常熟理工学院学报（自然科学）》.2008,第22卷(第10期),6-11. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102158099A (en) | 2011-08-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203522773U (en) | POE power supply splitter and POE system | |
| CN201724988U (en) | Input phase failure detector for power unit of high-voltage frequency converter | |
| CN203135543U (en) | Cell phone adapter | |
| CN102843051B (en) | Power supply adaptor | |
| CN213069012U (en) | High voltage wire harness insulation testing device based on direct current | |
| CN201976008U (en) | Remote control constant current source with phase selection connecting function | |
| CN105391320A (en) | Multi-phase power circuit | |
| CN104077260B (en) | A kind of concentrator M BUS host communication interface arrangements | |
| CN209880490U (en) | Electromagnetic relay control circuit based on zero-crossing detection | |
| CN102158099B (en) | Remote control constant current source with phase selection connection function and control method | |
| CN104362689A (en) | Direct-current emergency power supply device with supercapacitor module | |
| CN104579698A (en) | Power receiving end equipment | |
| CN204304446U (en) | The quick harmonics restraint reactive power compensator of a kind of intelligent integrated formula | |
| CN203275503U (en) | Universal high-voltage potential indicator | |
| CN205231540U (en) | Intelligence hot plug power is listed as cabinet | |
| CN104836239A (en) | Low-voltage intelligent synchronous switch | |
| CN201976115U (en) | Communication circuit | |
| CN209231764U (en) | A kind of laser wireless control apparatus | |
| CN203231468U (en) | Cabinet air conditioner having direct-current reverse connection resisting and alternating-current voltage offset detecting functions | |
| CN208955920U (en) | A kind of intelligence control system power supply buses multiple groups output reset switch power circuit | |
| CN209030069U (en) | A kind of multiple-output electric power | |
| CN203339798U (en) | Fire-fighting linkage power supply module | |
| CN207396699U (en) | A kind of AC220V voltage detecting circuits for fire-fighting equipment power supply | |
| CN207124489U (en) | A kind of Intelligent power distribution system of high RST transmission stability | |
| CN202188922U (en) | Multipath dual-mode detector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130424 Termination date: 20170114 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |