CN104752913A - Universal safety electric socket - Google Patents
Universal safety electric socket Download PDFInfo
- Publication number
- CN104752913A CN104752913A CN201510124303.9A CN201510124303A CN104752913A CN 104752913 A CN104752913 A CN 104752913A CN 201510124303 A CN201510124303 A CN 201510124303A CN 104752913 A CN104752913 A CN 104752913A
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- Prior art keywords
- phase
- circuit
- socket
- voltage
- contactor
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
- H01R13/665—Structural association with built-in electrical component with built-in electronic circuit
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
- H01R13/70—Structural association with built-in electrical component with built-in switch
- H01R13/713—Structural association with built-in electrical component with built-in switch the switch being a safety switch
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R27/00—Coupling parts adapted for co-operation with two or more dissimilar counterparts
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a universal safety electric socket which is connected with an AC electric wire of a U, V, W, N and PE three-phase five-wire system. The universal safety electric socket comprises an AC contactor KT, a short circuit/ overvoltage/ undervoltage/ overcurrent protecting QF, an electricity leakage detecting control circuit CT and a socket unit ET. The socket has the protection function for short circuit, overload, unvervoltage, overcurrent and electricity leakage. The whole circuit is high in capacity of being cut off in danger; the arc spark in electric contact is small; the sense of scare and fear of students at the beginning of electrifying can be removed, and the safety and protection in experiment and practices can be greatly improved; a fuse is not connected, thus the trouble of replacing the fused core or fused wire after abnormal accident of the common protection is avoided, the resource can be saved, and the protection can be safely and reliably performed; an interface of the socket unit ET under safe electrifying is of a three-phase four-hole type or a single-phase three-hole type; the single-phase three-hole or three-phase four-hole can be applied to a power board by adapting, and the protection effect is the same; therefore, the connection scope of the experimental socket board can be conveniently expanded.
Description
Technical field
The present invention relates to a kind of socket, particularly a kind of safe energization socket with defencive function.
Background technology
During vocational education and all kinds of electromechanical speciality learn, student and teacher will do a large amount of dynamo-electric real training laboratories every year, and the circuit of testing making is all different at every turn, especially the electrotechnics student begun to learn will complete the experiment works of AC220V/AC380V, first time energising, normal occur experimental circuit internal short-circuit on fire, burn out the accidents such as automatically controlled facility.Trace it to its cause, because the knowledge understanding of beginner to electrical engineering circuit is limited, the circuit structure placement-and-routing made makes mistakes or the difference such as carelessness, there will be multiple unpredictable mistake or wrong plug-in unit etc., cause tested product be energized moment be just short-circuited, overcurrent, the accident such as electric leakage.These accidents, gently then broken parts real training equipment, heavy then likely entail dangers to is to the teachers and students' life security participating in test, this is also sensational absolutely not, and the accident in mech-electric experiment is everyday of common occurrence both at home and abroad.
Test dangerous because electrical engineering circuit organizes the student real training, teachers and students complete a set of electromechanics test will significant care careful, because fearing, accidents happened, make participation test the teachers and students made and have larger pressure, especially the low-voltage electrical circuit product made is energized first, repeatedly checks although done by universal instrument or Other Instruments before and tests, unpredictability in Experiment of Electrical Circuits is difficult to avoid, and is exactly the assurance that the old laboratory technician of experiment experience for many years is also difficult to 100%.So, complete student or the teacher of self testing electroscope facility, all fear to insert energising (AC220V/380V) instantaneously, at once be short-circuited (play spark, smolder, quick-fried fuse, burn electric wire, ruin electrical equipment etc.) event, when causing real training, teacher, student switch on power for giving test electrical installation " plug-in " and fear and worry., in the electromechanics manufacture of factory of enterprise, also usually there is the energising of new control equipment and occur because of short circuit or electric leakage to damage the hidden danger events such as electrical equipment, fire, electric shock in this dangerous situation not only school.
Summary of the invention
In order to overcome the deficiencies in the prior art, the invention provides one and there is the protection systems such as overload, under-voltage, overcurrent, electric leakage, can prevent and avoid the peril in dynamo-electric test, ensure the safe energization socket of Almightiness type that the real training test class of teachers and students carries out safely.
The technical solution adopted for the present invention to solve the technical problems is:
The safe energization socket of a kind of Almightiness type, connects the alternating electromotive force circuit of U, V, W, N, PE three-phase five-wire mode, comprises A.C. contactor KT, short circuit/overvoltage/under-voltage/current foldback circuit QF, electric leakage telemetry circuit CT and socket unit ET; The input termination U of described A.C. contactor KT, V, W three-phase alternating current, the input of described short circuit/overvoltage/under-voltage/current foldback circuit QF is connected with the output of A.C. contactor KT; Described socket unit ET comprises three-phase socket and single-phase socket, and the three-phase alternating current terminal of described three-phase socket is connected with U, V, W three-phase alternating current output of A.C. contactor KT respectively, and zero terminal is connected with N line; The live wire end terminal of described single-phase socket any one to be connected with U, V, W three-phase alternating current output of A.C. contactor KT, and zero terminal is connected with N line, and ground wire terminal is connected with PE line; The three-phase line of described short circuit/overvoltage/under-voltage/between current foldback circuit QF and socket unit ET is through the induction coil of described electric leakage telemetry circuit CT, and the lead-out terminal of described electric leakage telemetry circuit CT is connected with the control end of described A.C. contactor KT.
As a further improvement on the present invention, U, V, W three-phase alternating current output of described short circuit/overvoltage/under-voltage/current foldback circuit QF output is connected with one end of three indicator lights respectively, and the other end of described three indicator lights is connected with N line.
Further improve as of the present invention, in U, V, W three-phase alternating current output of described short circuit/overvoltage/under-voltage/current foldback circuit QF output, wherein between two-phase, be connected with leakage tests switch DA.
Described short circuit/overvoltage/under-voltage/current foldback circuit QF is air switch.
Described A.C. contactor KT, short circuit/overvoltage/under-voltage/current foldback circuit QF, electric leakage telemetry circuit CT are arranged in a bin, and described socket unit ET is arranged on the shell of bin.
The invention has the beneficial effects as follows: the safe energization socket of Almightiness type of the present invention comprises A.C. contactor KT, short circuit/overvoltage/under-voltage/current foldback circuit QF, electric leakage telemetry circuit CT and socket unit ET, short circuit is had when running into testing inspection inside circuit, overload, under-voltage, overcurrent, during the abnormal failures such as electric leakage, there is good defencive function, current supply circuit can be cut off fast, because breaking capacity in danger in transmitting loop of the present invention is high, arc light spark greatly reduces, just eliminate fearing and fear when preliminary examination students is energized, greatly improve degree of safety and protection in experimental real-training.Owing to not adopting fuse in circuit; eliminate Universal protector after abnormal accident; change the trouble of fusing core or fusible link; not only saving resource but also can be safe and reliable protection; the interface of socket has three-phase four hole and single-phase three-hole two kinds; single-phase three-hole (or three-phase four hole) also can do extension socket plate with turning slotting power board, equally also can play a protective role.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is circuit principle structure figure of the present invention.
Embodiment
With reference to Fig. 1, the safe energization socket of a kind of Almightiness type, connects the alternating electromotive force circuit of U, V, W, N, PE three-phase five-wire mode, comprises A.C. contactor KT, short circuit/overvoltage/under-voltage/current foldback circuit QF, electric leakage telemetry circuit CT and socket unit ET; The input termination U of described A.C. contactor KT, V, W three-phase alternating current, the input of described short circuit/overvoltage/under-voltage/current foldback circuit QF is connected with the output of A.C. contactor KT; Described socket unit ET comprises three-phase socket (380V) and single-phase socket (220V), and the three-phase alternating current terminal of described three-phase socket is connected with U, V, W three-phase alternating current output of A.C. contactor KT respectively, and zero terminal is connected with N line; The live wire end terminal of described single-phase socket any one to be connected with U, V, W three-phase alternating current output of A.C. contactor KT, and zero terminal is connected with N line, and ground wire terminal is connected with PE line; The three-phase line of described short circuit/overvoltage/under-voltage/between current foldback circuit QF and socket unit ET is through the induction coil of described electric leakage telemetry circuit CT; the lead-out terminal of described electric leakage telemetry circuit CT is connected with the control end of described A.C. contactor KT; pay special attention to; protection zero line and PE line, can not through earth leakage protective device.
A.C. contactor KT adopts quick de-electric-type; protective current is that 20mA(is general in 30mA); compare with common earth leakage protective device; speed not only fast 1 times; and highly sensitive 1/3rd, the safeguard protection of begining to learn hookup product to students has well fast and effective accurately.
U, V, W three-phase alternating current output of described short circuit/overvoltage/under-voltage/current foldback circuit QF output is connected with one end of three indicator lights respectively; the other end of described three indicator lights is connected with N line; after energising, three indicator lights are lighted, and represent that U, V, W three-phase alternating-current powered is normal.
Foregoing circuit of the present invention is arranged in a bin, if trial target one group of high-power mechanical-electrical device during energising, also need not be afraid of to occur large arc light pyrophoric behavio(u)r.Socket unit ET is arranged on the shell of bin, debugging is checked and examined in the energising simultaneously can carrying out tens array hookup products, participate in the need of the energising detection of experiment product for meeting Practical Courses several test student simultaneously, often overlap three-phase (AC380V) and single-phase (AC220V) respectively equipment 15 groups of safety socket, if there is any battery of tests circuit to occur abnormal failure, all can the safety of electricity consumption of power-off protection testing ground, patch power board do patch-panel for expanding available one of the scope of application single-phase (AC220V), 5X15=75 group can be extended, equally also can play a protective role, but socket is many mutually in test, still the fail safe of electricity consumption will be noted.Here ben, common earth leakage circuit-breaker or earth leakage protective device are only applicable to power frequency AC, and to other power supply, the trial target as the circuit such as DC power supply, high frequency electric source is inapplicable, must not abuse.
1, short circuit/overvoltage/under-voltage/overcurrent protection function
In the present invention, described short circuit/overvoltage/under-voltage/current foldback circuit QF is air switch, namely circuit breaker, and current air switch has possessed short circuit/overvoltage/under-voltage/overcurrent tripping defencive function.Air switch access three-phase four-wire system (AC380V/AC220V/50HZ) electric power system; that presses air switch presses green " conjunction " pressure button QA; enter "on" position; air switch; connect in circuit, disjunction and carrying rated operational current, and can transship at circuit and load (example: motor, A.C. contactor, light fixture etc.), short circuit, under-voltage carry out the switching effect of protectiveness supply voltage.
The main contacts of automatic air-break switch is that the dynamic green " conjunction " of pressing of armrest presses button QA.After main contacts ZC is closed, main contacts ZC is locked on closing position by free tripping mechanism, three-phase four-wire system (AC380V/AC220V/50HZ) place power supply state.The coil of the overcurrent trip of this controller and the thermal element of thermal overload release are connected with main circuit, the coil of under-voltage release and power sources in parallel.When hookup be short-circuited or heavy overload time, the armature adhesive of overcurrent trip, makes free tripping mechanism action, and main contacts ZC disconnects main circuit.When circuit overloads, the thermal element heating of thermal overload release makes on bimetal leaf bending, promotes free tripping mechanism action; When circuit under voltage, the armature release of under-voltage release, also makes free tripping mechanism action, cuts off main contacts ZC.Test U, V, W three-phase power supply system that the abnormal accidents such as appliance circuit is short-circuited, overcurrent, under voltage, overload all effectively can cut off rapidly main contacts ZC in access, protect the galvanoscopic safety of examination.
2, creepage protection function
Earth leakage protective is another large characteristic of safety socket of the present invention; due to experiment producer is new hand; neglect wrong line for the moment; or the first-class reason of casing part is encountered in exposed electric wire girdle contact; the generation electric leakage accident of the hookup device that capital is caused, it is anticreep with electrical shock protection safety system that this just requires safety socket to have.
If just trial product generator shell electric leakage or personnel's electric shock accidents, three-phase current sum just no longer equals zero, and equals a certain phase current values Ins.The leakage current of Ins by casing or human body, greatly, transformer neutral point forms loop, can be detected by electric leakage telemetry circuit CT, controls A.C. contactor KT and disconnect.
In the present invention; electric leakage telemetry circuit CT is zero sequence current mutual inductor; when there is electric leakage; zero sequence current mutual inductor secondary side produces the induced electromotive force corresponding with Ins, when Ins reaches certain value (30mA), and release action; promote the snap close of A.C. contactor KT; disconnect U, V, W three-phase power supply system of main circuit, enter leak shock guard mode, with the safety of protection test personnel and equipment and material.
3, leakage tests function
In U, V, W three-phase alternating current output of described short circuit/overvoltage/under-voltage/current foldback circuit QF output, wherein between two-phase, be connected with leakage tests switch DA.Earth leakage protective button DA is examination electric protection button, and its examination electric protection electric current is because exceeding 1/3(20mA than general)
So its test resistance R4 20K Ω/1W larger than general resistance.Before test, first click DA and try eletric button, energy normal power down, namely contact KT cuts off (often opening) three-phase electricity, and the indicator light (red greenish-yellow) on U, V, W three-phase extinguishes as earth leakage protective is normal.Attention to the air switch of safety socket and leakage switch reliability, will accomplish periodic check and detection, and this is the important duty of each colleges and universities and enterprise's mech-electric experiment room administrative staff.
4, mutually disconnected and phase shortage is reported to the police and is indicated
In practice, we find three-phase (the U phase in Fig. 1, V phase, W phase) indicator light, owing to have employed special high-brightness light emitting diode (the red greenish-yellow LED of Ф 5mm) indicator light, not only profile is beautiful, three red greenish-yellow LED also have disconnected phase and open-phase protection to indicate effect, because safe energization socket of the present invention mainly uses for beginner, may occur not connecing certain phase line in three-phase four-wire power supply, especially working zero line (N) is not connect, zero line does not connect and can cause multiple shielding failure, three-phase (U phase can be made, V phase, W phase) indicator light all do not work, just prompting experimenter tests after fixing a breakdown again, as lack a phase line or a certain phase voltage on the low side, indicator light can not work or meeting luminance shortage, experimenter is all pointed out to fix a breakdown again, do next step detection experiment again, these automated, multi-levels have been had to protect detection system, make participation experimenter safer, teaching result is just better.
Indicator light LED selects a kind of special luminescent device be made up of CMOS integrated circuit and light-emitting diode, can be used for report to the police instruction and blinking light emitting diode (BTS) that is under-voltage, superpressure instruction, model: BTS32405B type, operating voltage 5V, electric current is that electric current selectes 35mA, and current-limiting resistance selects 6.2K/1W best results.
The operation of safety socket:
1, the POST of safety socket: when after connection three-phase four-wire system power supply to the safe energization socket of Almightiness type, press green " conjunction " pressure button QA, indicator light (red greenish-yellow) on U, V, W three-phase is lighted, and represents that the three-phase four-wire system power supply of safety energization socket has entered and treats operating state.
2, press redness and " divide " pressure button QT, the indicator light (red greenish-yellow) on U, V, W three-phase extinguishes, and represents that safety socket self-inspection is normal.
3, after self-inspection normally, press green " conjunction " pressure button QA, cut off the power supply on socket, at this moment, by the input power plug (380V or 220V) of product device to be tested, to be energised on the socket of insertion three-phase (380V) or single-phase (220V).
4, after socket inserting test products, then press green " conjunction " pressure button QA, test products device enters the energizing test stage, at this moment has two kinds of results:
A, trial target circuit arrangement are normal: institute's trial product energising is normal, and experimenter can proceed test.
B, trial target circuit arrangement are abnormal: red " dividing " pressure button QT automatic trip power-off (cutting off 380V or 220V), illustrates that this trial target circuit arrangement inside has the anomalous event of " short circuit " or " electric leakage " etc. to occur.Experimenter will stop test, extract attaching plug, short circuit that trial target may exist, electric leakage, overvoltage, the disadvantage mistake such as under-voltage are looked in de-electric-examination, repair after test product device, then plug-in test, if still occur that redness " divides " pressure button QT tripping operation power-off, will reexamine and treat test product circuit, until the indicator light on U, V, W three-phase seeing on the panel of this device occurred is normal, namely U, V, W three-phase indicator light is complete normally bright, and experimenter can continue to do experiment.
Safety socket of the present invention can be eliminated and avoid in electronic product trial-production completely, the danger that the accident such as the short circuit of test (facility) inside circuit, electric leakage that carelessness or false wiring due to experiment producer cause is expanded in energising detects again.The safe energization socket device of Almightiness type is equipped with in the laboratory of colleges and universities or factory; teachers and students and workman just can be courageously relieved the test works completing oneself; do not worry due to not yet done to automatically controlled performance or neglect for the moment again, and make to occur during energising trial-production circuit facility and damage or the peril of personal safety.
Claims (5)
1. the safe energization socket of Almightiness type, connects the alternating electromotive force circuit of U, V, W, N, PE three-phase five-wire mode, it is characterized in that it comprises A.C. contactor KT, short circuit/overvoltage/under-voltage/current foldback circuit QF, electric leakage telemetry circuit CT and socket unit ET; The input termination U of described A.C. contactor KT, V, W three-phase alternating current, the input of described short circuit/overvoltage/under-voltage/current foldback circuit QF is connected with the output of A.C. contactor KT; Described socket unit ET comprises three-phase socket and single-phase socket, and the three-phase alternating current terminal of described three-phase socket is connected with U, V, W three-phase alternating current output of A.C. contactor KT respectively, and zero terminal is connected with N line; The live wire end terminal of described single-phase socket any one to be connected with U, V, W three-phase alternating current output of A.C. contactor KT, and zero terminal is connected with N line, and ground wire terminal is connected with PE line; The three-phase line of described short circuit/overvoltage/under-voltage/between current foldback circuit QF and socket unit ET is through the induction coil of described electric leakage telemetry circuit CT, and the lead-out terminal of described electric leakage telemetry circuit CT is connected with the control end of described A.C. contactor KT.
2. safe energization socket according to claim 1; it is characterized in that U, V, W three-phase alternating current output of described short circuit/overvoltage/under-voltage/current foldback circuit QF output is connected with one end of three indicator lights respectively, the other end of described three indicator lights is connected with N line.
3. safe energization socket according to claim 1, is characterized in that U, V, W three-phase alternating current output of described short circuit/overvoltage/under-voltage/current foldback circuit QF output is wherein connected with leakage tests switch DA between two-phase.
4. safe energization socket according to claim 1, is characterized in that described short circuit/overvoltage/under-voltage/current foldback circuit QF is air switch.
5. safe energization socket according to claim 1, it is characterized in that described A.C. contactor KT, short circuit/overvoltage/under-voltage/current foldback circuit QF, electric leakage telemetry circuit CT is arranged in a bin, described socket unit ET is arranged on the shell of bin.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520160633.9U CN204497496U (en) | 2015-03-20 | 2015-03-20 | The safe energization socket of Almightiness type |
| CN201510124303.9A CN104752913A (en) | 2015-03-20 | 2015-03-20 | Universal safety electric socket |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520160633.9U CN204497496U (en) | 2015-03-20 | 2015-03-20 | The safe energization socket of Almightiness type |
| CN201510124303.9A CN104752913A (en) | 2015-03-20 | 2015-03-20 | Universal safety electric socket |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104752913A true CN104752913A (en) | 2015-07-01 |
Family
ID=72474041
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520160633.9U Expired - Fee Related CN204497496U (en) | 2015-03-20 | 2015-03-20 | The safe energization socket of Almightiness type |
| CN201510124303.9A Pending CN104752913A (en) | 2015-03-20 | 2015-03-20 | Universal safety electric socket |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520160633.9U Expired - Fee Related CN204497496U (en) | 2015-03-20 | 2015-03-20 | The safe energization socket of Almightiness type |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN204497496U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105650017A (en) * | 2015-12-23 | 2016-06-08 | 广东美的暖通设备有限公司 | Fan rotation speed measuring fixture |
| WO2018019213A1 (en) * | 2016-07-24 | 2018-02-01 | 郭振华 | Intelligent control circuit, charger, leakage protector and intelligent socket |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204497496U (en) * | 2015-03-20 | 2015-07-22 | 中山市唐王光电技术有限公司 | The safe energization socket of Almightiness type |
| CN106329498A (en) * | 2016-09-07 | 2017-01-11 | 合肥三冠包装科技有限公司 | Protection circuit for six-head balance main power circuit |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87212552U (en) * | 1987-12-05 | 1988-12-07 | 上海市燎原电器总厂二分厂 | Power supply plug with electricity leakage protecting |
| JPH10163045A (en) * | 1996-11-29 | 1998-06-19 | Eye Lighting Syst Corp | Transformer core, three-phase power transformer and discharge lamp stabilizer |
| CN2386552Y (en) * | 1999-06-09 | 2000-07-05 | 卢志信 | Power-supply socket with high sensitivity leakage and overvoltage protection |
| US20050212505A1 (en) * | 2001-06-08 | 2005-09-29 | Murray Martin A | Measuring devices |
| CN201674072U (en) * | 2010-05-17 | 2010-12-15 | 李连池 | Movable earth leakage protection socket |
| CN202103420U (en) * | 2010-03-10 | 2012-01-04 | 顾伟 | Safety movable power source chamber |
| CN202210598U (en) * | 2011-08-15 | 2012-05-02 | 郑州人造金刚石及制品工程技术研究中心有限公司 | Dual anti-creeping socket |
| CN202735430U (en) * | 2012-07-04 | 2013-02-13 | 广东金南方电器实业有限公司 | Comprehensive testing power supply box of low voltage complete equipment |
| CN204497496U (en) * | 2015-03-20 | 2015-07-22 | 中山市唐王光电技术有限公司 | The safe energization socket of Almightiness type |
-
2015
- 2015-03-20 CN CN201520160633.9U patent/CN204497496U/en not_active Expired - Fee Related
- 2015-03-20 CN CN201510124303.9A patent/CN104752913A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87212552U (en) * | 1987-12-05 | 1988-12-07 | 上海市燎原电器总厂二分厂 | Power supply plug with electricity leakage protecting |
| JPH10163045A (en) * | 1996-11-29 | 1998-06-19 | Eye Lighting Syst Corp | Transformer core, three-phase power transformer and discharge lamp stabilizer |
| CN2386552Y (en) * | 1999-06-09 | 2000-07-05 | 卢志信 | Power-supply socket with high sensitivity leakage and overvoltage protection |
| US20050212505A1 (en) * | 2001-06-08 | 2005-09-29 | Murray Martin A | Measuring devices |
| CN202103420U (en) * | 2010-03-10 | 2012-01-04 | 顾伟 | Safety movable power source chamber |
| CN201674072U (en) * | 2010-05-17 | 2010-12-15 | 李连池 | Movable earth leakage protection socket |
| CN202210598U (en) * | 2011-08-15 | 2012-05-02 | 郑州人造金刚石及制品工程技术研究中心有限公司 | Dual anti-creeping socket |
| CN202735430U (en) * | 2012-07-04 | 2013-02-13 | 广东金南方电器实业有限公司 | Comprehensive testing power supply box of low voltage complete equipment |
| CN204497496U (en) * | 2015-03-20 | 2015-07-22 | 中山市唐王光电技术有限公司 | The safe energization socket of Almightiness type |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105650017A (en) * | 2015-12-23 | 2016-06-08 | 广东美的暖通设备有限公司 | Fan rotation speed measuring fixture |
| WO2018019213A1 (en) * | 2016-07-24 | 2018-02-01 | 郭振华 | Intelligent control circuit, charger, leakage protector and intelligent socket |
Also Published As
| Publication number | Publication date |
|---|---|
| CN204497496U (en) | 2015-07-22 |
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Application publication date: 20150701 |
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