CN101114557A - Safety circuit breaker - Google Patents
Safety circuit breaker Download PDFInfo
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- CN101114557A CN101114557A CNA2007100126368A CN200710012636A CN101114557A CN 101114557 A CN101114557 A CN 101114557A CN A2007100126368 A CNA2007100126368 A CN A2007100126368A CN 200710012636 A CN200710012636 A CN 200710012636A CN 101114557 A CN101114557 A CN 101114557A
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- spring
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 16
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- 238000005507 spraying Methods 0.000 claims description 4
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims 2
- 229910052742 iron Inorganic materials 0.000 claims 1
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- 238000009825 accumulation Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
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- 230000008569 process Effects 0.000 description 2
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- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
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- 238000001816 cooling Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
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Abstract
A safety breaker comprises a handle, a tension spring, a U-shaped ring, a plastic compression bar, a moving contact with linear motion double breaks, a static contact with an end tab, an arc chute, a reaction spring, an overrun spring, an electromagnetic breaking device, a fast current sensor, an earth leakage current transformer and a controller. The mechanical release, the four-bar linkage, the thermal relay and the soft connection of the existing breaker are removed, and the protective function is realized by the electromagnetic breaking device, the fast current sensor, the earth leakage current transformer and the controller. As the contact system is of double breaks which is the same as the contactor, breaking and closing are operated manually, the safety breaker has the advantages of fast breaking, strong ability of arc extinguishing, safe and reliable operation, simple structure, fewer components, small volume and low production cost, and the electrical endurance life and the mechanical life can be prolonged by over 20 times.
Description
Technical field
Safety cut-out is used for protective circuit and power consumption equipment; belong to the protection electrical equipment in the mechanical switch; also can be used as not, the control switch of frequent operation uses; use electromagnetism breaker system to replace complicated four connecting rods and mechanical tripping device; adopt the double break mouth to replace single break simultaneously; make that moving contact closes, separating brake becomes rectilinear motion, eliminated being flexible coupling on electric, the mechanical endurance and the electric life of circuit breaker improved respectively more than 20 times.
Technical background
Existing circuit breaker adopts four connecting rods and release that moving contact is rotated realize to divide, close a floodgate, and the motion of closing a floodgate is acted on by the manpower joystick that switching-in spring finishes.The separating brake motion divides three kinds of situations, and normal running is finished the separating brake motion by manpower, finishes the separating brake motion by electromagnetic relay during short circuit, finishes the separating brake motion by thermal relay during overload.Thermal relay is influenced by ambient temperature big, and the heat accumulation time is long, and resetting time is long, and active force passes to four connecting rods by tripping system and moving contact done rotate and finished separating brake and move.Caused moving component many like this, interconnected complexity, the error of each parts stroke accumulation is bigger, causes misoperation easily, and electric life is also very low.Moving contact rotates in addition, then realizes by being flexible coupling, and causes that mechanical endurance is very low and be flexible coupling.Existing circuit breaker adopts four complicated connecting rods and takes off mouthpart, simultaneously the link of being flexible coupling is arranged again, and this is low excessively key reason mechanical endurance, also is the main cause that circuit breaker stable operation reliability reduces.In order to overcome the existing above-mentioned shortcoming of circuit breaker, the present invention adopts the probe of contactor form, makes moving contact finish the motion of closing a floodgate by rotary handle compressed energy-storage spring during combined floodgate.Because handle power is added in the reaction spring and the acting in conjunction of excess of stroke spring of moving contact, quicken to finish the separating brake motion during separating brake.When short circuit or overload, do the separating brake motion by quick current-sensing control electromagnetism breaker acceleration handle and finish quick disjunction.Three parts of moving contact and moving contact depression bar and handle can be realized the rectilinear motion of moving contact like this.Simplified moving component significantly, cancelled the system that is flexible coupling again, and the electromagnetism breaker is only when running into short circuit or overload situation, play and offset the switching-in spring active force and quicken separating brake and the power-assisted effect, therefore the electromagnetism breaker is very little parts, the electromagnet in the A.C. contactor.Handle still rotates, because handle drives the moving contact depression bar and affacts on the moving contact, make moving contact do rectilinear motion, be fixed into as a whole parts by the plastics depression bar with reaction spring and excess of stroke spring location and with moving contact, depression bar transmits handle power makes moving contact do combined floodgate or separating brake motion, therefore can become to improve more than 20 times with electric life mechanical endurance, novel breaker of the present invention be called " safety cut-out ".
Substantive technology contents
Safety cut-out rotates up combined floodgate by the manpower joystick, handle shape is identical substantially with existing circuit breaker, but connected mode is different with existing circuit breaker with structure, arm pivot post is on handle center's line, and be fixed on the casing, the present invention adopts extension spring, produces revolving force handle and casing are coupled together, the extension spring lower end is fixed on the housing, and the extension spring upper end is fixed on the axle of handle center's line.Close when handle is in, during the centre position of sub-gate position horizontalization separated time, the extension spring center line overlaps with the handle center line and the axis of rotation by handle.The revolving force that this position extension spring acts on the handle equals zero, and this center is equivalent to the dead point to the extension spring revolving force.The revolving force that acts on the handle in extension spring before the dead point makes handle get back to gate-dividing state, position after at the dead point, the revolving force that extension spring acts on the handle makes handle be in "on" position, therefore other upper handles of being in respectively outside branch, the closing position of handle can not be stablized stop, and this is the property that the structure of handle extension spring causes.As long as handle is under external force through behind the dead point, external force disappears also can rotate on which settling position except that the dead point, so separating brake and closing position are the stable state points, external force refers to that the people acts on branch, the switching force on the handle, refers to that perhaps electromagnetism breaker mechanism acts on the tripping force on the handle.
The present invention adopts the electromagnetism breaker to produce tripping force, the electromagnetism breaker belongs to voltage-type dc coil electromagnet, it can not detect the size of electric current and can only produce tripping force, therefore coil will pass through conducting of IGBT switch controlled or shutoff, IGBT conducting electromagnetic actuation produces tripping force, and the IGBT switching tube can receive the signal of telecommunication that a plurality of fault currents export and makes circuit breaker choose lock like this.Single-phase circuit breaker or multi-phase circuit breaker need only be established an electromagnetism breaker and can control simultaneously and whenever trip immediately when fault current occurring mutually, the all exportable signal of telecommunication makes circuit breaker trip for the electromagnetism breaker when short circuit current or overload fault current and Leaked Current of Line to Ground accident, and all fault current signals are all exported to electromagnetism breaker generation tripping force trips circuit breaker immediately.Owing to the electromagnetism breaker receive fault current after IGBT conducting immediately produce tripping force, tripping operation run duration and quenching time sum at most can be above 20 milliseconds, IGBT control coil conducting current time at most can be above 20 milliseconds yet, the other times coil is to be in zero load, coil always is in conducting electric current under the normal temperature state like this, ON time is short again, therefore coil conducting current overload is very competent, the voltage-type coil can increase considerably than operate as normal coil conducting rated current within 20 milliseconds, be equivalent to short-circuit current value, so the lead of electromagnetism breaker coil can be very thin, current density can increase substantially.As seen the electromagnetism breaker is different from the electromagnet in the contactor, coil is in conducting state during contactor making electromagnet operate as normal, and the electromagnetism breaker all is in the coil blackout state when operate as normal or during the disjunction state, have only that coil just is in conducting state within 20 milliseconds in the breaking course, this is identical with the current relay operating state, so the execution components and parts that the electromagnetism breaker is short circuit and overload fault current and electric leakage fault current thereof after sending trip signal.The present invention adopts quick current-sensing to detect short circuit current and overload fault current, owing to there is fixing air gap in the magnetic circuit of quick current-sensing, current changing rate can be directly changed into voltage signal, immediate current rate of change maximum has just appearred in short circuit current, be directly changed into enough big voltage signal, export to the electromagnetism breaker immediately and carry out trip command, so tripping operation speed is fast, the time of cutting-off of short-circuit electric current is short.Quick current-sensing detects the wide ranges of size of current in addition; can detect short circuit current; can detect the overload electric current again; also can detect simultaneously the short time delay overload fault current of the rated current more than 6 times; make safety cut-out realize omnibearing defencive function; safety cut-out earth leakage protective adopts existing leakage current transformer, detects leakage current over the ground.All fault currents all convert the signal of telecommunication to and directly export to electromagnetism breaker control IGBT switching tube conducting generation tripping force like this, make the circuit breaker disjunction.Thoroughly broken away from the influence of the influenced by ambient temperature and installation site of thermal relay, the error that causes is excessive or occur shortcomings such as misoperation easily, the resetting time of thermal relay is long in addition, in case of emergency also can't make the breaker closing operation after the tripping operation, this also is the shortcoming that thermal relay can't overcome, these shortcomings that adopt thermal relay to cause in the existing circuit breaker are all thoroughly overcome in safety cut-out.All fault currents send trip signal and all produce tripping force by an electromagnetism breaker, directly act on the plastics depression bar of moving contact, realize the tripping operation motion, and simple in structure, connecting link is few.Quadric chain and dropout link complicated in the existing circuit breaker have been overcome, and reduce because connecting link causes the big shortcoming of accumulation site error more, so the mechanical part in the safety cut-out reduces significantly, makes and installs easily, safe and reliable to operation, and cost descends.
Safety cut-out mechanical structure is simple, by handle manual revolving force is acted on the moving contact plastics depression bar through U type ring, and the plastics depression bar is subjected to the slide rail restriction to do rectilinear motion with moving contact.Contact system and structure are identical with contactor, moving contact is oppressed by excess of stroke spring and reaction spring active force, and being fixed into as a whole parts with the plastics depression bar, the reaction spring fulcrum is fixed on the housing, the clearance between open contacts maximum when the compressing moving contact is on the separating brake position.Affect switch on of moving contact by the handle revolving force through the moving plastics depression bar of U type endless belt during combined floodgate, and compression excess of stroke spring makes moving contact to closing position.At this moment handle is subjected to the extension spring active force greater than excess of stroke spring and reaction spring compressing moving contact active force sum, so handle is stabilized on the closing position by the extension spring tension.Get back to the separating brake position if want to make handle, answer manpower to separating brake position rotation or make the electromagnetism breaker produce tripping force, when excess of stroke spring and reaction spring act on power on the moving contact and external force sum greater than the extension spring tightening force, will make moving contact and handle get back to the separating brake position.Fixed contact and run-on tab weld together, and run-on tab is pressed on the support bar of shell and with arc control device and handle chamber and is isolated into two sealing chambers, and arc control device are provided with the arc extinguishing screen, and arc spraying mouth is through arc control device and cooling chamber ejection.Quick current-sensing is fixed in the handle chamber after being inserted in the fixed contact conductive plate, and same leakage current transformer also is fixed in the handle chamber of opposite side and with live wire and zero line and on the leakage current transformer magnetic circuit.Live wire and zero line single-phase voltage become electromagnetism breaker DC control supply after the energy storage of bridge rectifier electrochemical capacitor, electromagnetism breaker coil be connected to DC power supply after the IGBT switching tube is connected, the IGBT switching tube can receive multichannel control voltage pulse signal and conducting makes circuit breaker trip.Other fault currents such as short circuit accident electric current, overload fault current, electric leakage fault current send voltage pulse signal when occurring, isolate mutually that through diode voltage pulse signal is inputed to the IGBT switching tube, as long as there is one road voltage pulse signal circuit breaker is tripped immediately through the isolating diode input.The width of potential pulse should be selected in about 15 milliseconds, can guarantee that like this circuit breaker reliably trips, and the coil ON time has only 15 milliseconds can not generate heat, and avoids the long-term conducting electric current of coil.Electromagnetism breaker voltage-type coil is because the number of turn is few, AC impedance is low, therefore the current-rising-rate during the coil conducting is very fast, 1.2 millisecond left and right sides conducting electric current can be by the maximum that is raised to above freezing, make magnetic flux in the magnetic circuit state that reaches capacity, so the pull characteristics of electromagnetism breaker when having image current relay conducting short circuit current.Produce tripping force during the moving adhesive unshakable in one's determination of electromagnetism breaker like this, and the current relay in pull characteristics in the attracting process and the existing circuit breaker is close.Produce repulsion when short circuit current is through moving contact in addition moving contact is scolded out rapidly, can quicken the breaking speed that trips.Quick current-sensing is maximum by the induced voltage signal that current-rising-rate causes in secondary coil at the incipient zero crossing of short circuit current constantly, therefore when the short circuit current zero crossing with regard to exportable short circuit current trip command, so the ability of safety cut-out disjunction short circuit current is strong, speed is fast, safe and reliable.
The present invention still adopts leakage current transformer to detect the Leaked Current of Line to Ground fault current, and zero line and live wire and on the instrument transformer magnetic circuit, the voltage signal that secondary coil is responded to are exported to IGBT switching tube in the electromagnetism breaker as the trip command signal after rectification.The introducing of zero line and draw joint be arranged on another isolated chamber of live wire and arc control device in, wiring boards such as the controller of electromagnetism breaker and power supply also are arranged in another chamber of this isolation, this is identical with existing earth leakage circuit breaker.The present invention adopts quick current-sensing to detect fault currents such as short circuit and overload, there is the air gap of one section regular length in the magnetic circuit of quick current-sensing, the fixed contact conductive plate passes magnetic circuit as primary current, the secondary coil output voltage signal is directly proportional with primary current, the voltage signal of exporting during rated current is a sinusoidal waveform, and the secondary coil output voltage signal was very narrow impulse wave when primary current was the short circuit accident electric current.The voltage signal of secondary coil output becomes folk prescription to voltage behind bridge rectifier, use for detecting behind electric resistance partial pressure.The lower limit that adopts voltage comparator to measure the regulation short circuit current for short circuit current is then sent a pulse trip signal by controller makes the circuit breaker disjunction.For overload fault current I, then should square after add up I
2The t value is worked as I
2Controller sent a pulse voltage signal when t reached setting, made the circuit breaker disjunction.Send a pulse voltage signal by controller equally for other fault currents and make the circuit breaker disjunction.
No matter safety cut-out is a utmost point or multipole, need only an electromagnetism breaker and controller be set on extremely at one, other utmost points are with the handle interlock of which utmost point that the electromagnetism breaker is set, so the tripping force that the electromagnetism breaker produces should be greater than the tripping force sum of all utmost points.But each utmost point all should be provided with quick current-sensing to detect the fault current of each utmost point respectively.For example three-phase breaker can be established an electromagnetism breaker mutually in the centre, other and middle interlock mutually, the controller of electromagnetism breaker and wiring board can be arranged in the handle chamber of arbitrary phase in the both sides, electromagnetism breaker coil use direct voltage can by after the two phase firewire rectifications by providing behind the capacitance energy storage, emphasize capacitance energy storage be because short circuit current when occurring sending trip command the coil pick-up voltage always be in the maximum state, the electric current rate of climb is fast like this, can not be subjected to the sine wave phase angle to influence the electric current rate of climb, make the trip time short and stablize.Safety cut-out is by handle, extension spring, U type ring, plastics depression bar, moving contact and excess of stroke spring and reaction spring, reaction spring seat, electromagnetism breaker and pressing plate in a word, fixed contact and run-on tab and arc-chute, arc spraying mouth, quick current-sensing, leakage current transformer, plastic casing constitute, as shown in Figure 1.The wiring board that the controller of safety cut-out is made up of chip and other electronic devices is fixed in the handle chamber of isolating with arc control device, and the controller main line as shown in Figure 2.
Description of drawings
Accompanying drawing 1 is the structural representation of safety cut-out.
Accompanying drawing 2 is controller main loop circuit figure of safety cut-out.
Embodiment
The safety cut-out structural representation as shown in Figure 1.The 1st, spray arc road and arc spraying mouth, electric arc after supercooling, makes electric arc lose conductivity from the arc-chute ejection; The 2nd, arc extinguishing grid pieces, the 3rd, the fixed contact run-on tab is drawn electric arc when disjunction from silver point, and arc control device and handle chamber isolation are become two separate chambers, and the 4th, fixed contact and conductive plate, the 5th, live wire terminal screw; The 6th, quick current-sensing, detecting fault current will become voltage signal by the conductive plate current conversion, and the 7th, wiring board is the controller of electromagnetism breaker, the 8th, casing; The 9th, the electromagnetism breaker produces disjunction power and makes circuit breaker trip during circuit breaker emerged in operation fault current, be fixed contact and conductive plate, and the 10th, pressing plate, electromagnetism breaker attracting process passes to the plastics depression bar with tripping force and makes circuit breaker trip; The 11st, the plastics depression bar is fixed into moving contact, reaction spring, excess of stroke spring as a whole; The 12nd, U type ring be to transmit the connecting link of interaction force between handle and the plastics depression bar, and the 13rd, switch lever manually closes, the usefulness of separating brake; The 14th, the fixed rotating shaft of handle, the 15th, extension spring, make close, gate-dividing state is stable, the 16th, the reaction spring seat; The 17th, reaction spring; The 18th, leakage current transformer, the usefulness of detection leakage current over the ground; The 19th, moving contact, the 20th, excess of stroke spring is compressed in moving contact on the closing position during switch on of moving contact, and the 21st, circuit breaker is installed the card rail, circuit breaker is stuck on the attachment rail, the 22nd, the zero line terminal screw.Above-mentioned is the structural representation of single-phase circuit breaker.Three-phase breaker can be stacked to constitute by three single-phase circuit breakers, as long as in the handle chamber of a middle phase, establish an electromagnetism breaker, other handles that respectively communicated interconnect the tripping force and the manual operation power that the electromagnetism breaker can be produced and pass to other combined floodgate or disjunctions together mutually, can save two electromagnetism breakers like this, but the tripping force of an electromagnetism breaker generation should can guarantee that so the reliable tripping operation of three-phase or multipole circuit breaker makes the disjunction success greater than all phase or multipole tripping force sum.
Three-phase or multipole circuit breaker be repeated description no longer.The controller major loop line map of electromagnetism breaker as shown in Figure 2.Exchange single phase poaer supply through rectifier bridge Z
1After the rectification, adopt electrolytic capacitor C
1Energy storage becomes electromagnetism breaker coil L
1DC power supply, coil L
1G is connected in series in DC power supply with switching tube, and the control voltage signal of switching tube G is by controller 1 output, and controller 1 receives quick current-sensing secondary coil L
2Detect fault current through Z
2Send trip signal after the rectification and export to switching tube G, same earth leakage current instrument transformer secondary coil L
3Detect earth leakage current through Z
3Rectification is sent trip signal and is given switching tube G, the disjunction of control circuit breaker, and accident current vanishes after the disjunction, control signal also disappears, so the coil electric current of conducting for a long time not.If do not have closing by hand power after the tripping operation, circuit breaker can not close a floodgate once more, and the operational mode of this and existing circuit breaker is in full accord.Quick current-sensing sees that (application number: 200710012177.3) detailed description is arranged, the present invention is adopted patent of invention " safe contactor ", and the structure of quick current-sensing no longer describes in detail.
Claims (3)
1. safety cut-out is by handle; extension spring; U type ring; the plastics depression bar; moving contact and excess of stroke spring and reaction spring; the reaction spring seat; electromagnetism breaker and pressing plate; fixed contact and run-on tab and arc-chute; arc spraying mouth; quick current-sensing; leakage current transformer; plastic casing constitutes; close; the separating brake active force is produced by the manpower rotary handle; the revolving force that extension spring produces is in handle respectively and closes; all stable state during the separating brake position; the plastics depression bar is with excess of stroke spring; reaction spring; moving contact is fixed as whole moving component; defencive function detects fault current control electromagnetism breaker generation tripping force respectively by quick current-sensing and earth leakage current instrument transformer and makes the circuit breaker disjunction, becomes the safety cut-out with omnibearing protection function.
2. according to claim 1, handle rotates around fixed axis, when being in, closes by handle, during the centre position of separating brake, the center line of handle and the central lines of extension spring, at this moment the extension spring center line is by the fixed axis of handle, the extension spring lower end is fixed on the casing, the extension spring upper end is fixed on the axle of handle center's line, handle is connected with the plastics depression bar through U type ring, and the handle revolving force is passed to moving contact do rectilinear motion, realizes closing, separating brake, the fixed contact run-on tab is isolated into two independently chambers with arc control device and handle chamber, avoid device in the handle chamber to be subjected to electric arc influence and damage, moving contact is subjected to the slide rail constraint to do rectilinear motion, forms the double break mouth.
3. according to claim 1; the electromagnetism breaker is made of the voltage-type coil and the iron circuit that adopt DC power supply; DC power supply should be set up capacitance energy storage; the voltage-type coil turn is few; AC impedance is low; the conducting electric current is raised to the time of maximum about 1.2 milliseconds by above freezing; make in the magnetic circuit magnetic flux state that reaches capacity; pull characteristics when having current relay conducting short circuit current; an electromagnetism breaker produces tripping force and can drive the multipole circuit breaker tripping operation; and can receive the potential pulse trip signal that the multichannel fault current sends, make the circuit breaker disjunction, realize that circuit breaker possesses omnibearing defencive function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100126368A CN101114557A (en) | 2007-08-30 | 2007-08-30 | Safety circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100126368A CN101114557A (en) | 2007-08-30 | 2007-08-30 | Safety circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101114557A true CN101114557A (en) | 2008-01-30 |
Family
ID=39022813
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100126368A Pending CN101114557A (en) | 2007-08-30 | 2007-08-30 | Safety circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101114557A (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101834425A (en) * | 2010-03-30 | 2010-09-15 | 王有元 | Man-mobile phone-network double-communication power supply |
| CN101826420B (en) * | 2010-02-09 | 2012-04-18 | 王有元 | Alternating-current contactor with multiple-proportion moment |
| CN102568959A (en) * | 2010-11-23 | 2012-07-11 | 西门子公司 | Switch, especially for low voltage circuit breaker |
| CN108630506A (en) * | 2017-11-14 | 2018-10-09 | 佳电气有限公司 | Bypass module and leakage circuit breakers for leakage circuit breakers |
| CN109659203A (en) * | 2018-12-24 | 2019-04-19 | 厦门宏发开关设备有限公司 | A kind of miniature circuit breaker abnormal protection device and miniature circuit breaker |
| CN110289198A (en) * | 2019-07-26 | 2019-09-27 | 贵州泰永长征技术股份有限公司 | A kind of current limliting and quick disjunction structure of miniature circuit breaker |
| CN110444446A (en) * | 2018-05-06 | 2019-11-12 | 天津市中力神盾电子科技有限公司 | A miniature circuit breaker |
| CN111063586A (en) * | 2018-10-17 | 2020-04-24 | 天津市中力神盾电子科技有限公司 | a composite switch |
| CN111370265A (en) * | 2020-04-10 | 2020-07-03 | 未彬 | Contactor structure |
| US10770533B2 (en) | 2015-12-31 | 2020-09-08 | Lg Display Co., Ltd. | Organic light emitting diode display panel having pads disposed at different distances from an edge and organic light emitting diode display device having the same |
| CN112786400A (en) * | 2019-11-07 | 2021-05-11 | 余姚市嘉荣电子电器有限公司 | Separated permanent-magnet leakage protector |
| CN113237678A (en) * | 2021-04-16 | 2021-08-10 | 德基申（厦门）电气有限公司 | Method and equipment for testing mechanical function of circuit breaker |
| CN115206743A (en) * | 2022-08-26 | 2022-10-18 | 天津加美特电气股份有限公司 | Electromagnetic leakage circuit breaker adopting leakage current relay to replace EMR |
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2007
- 2007-08-30 CN CNA2007100126368A patent/CN101114557A/en active Pending
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101826420B (en) * | 2010-02-09 | 2012-04-18 | 王有元 | Alternating-current contactor with multiple-proportion moment |
| CN101834425A (en) * | 2010-03-30 | 2010-09-15 | 王有元 | Man-mobile phone-network double-communication power supply |
| CN101834425B (en) * | 2010-03-30 | 2012-07-25 | 王有元 | Man-mobile phone-network double-communication power supply |
| CN102568959A (en) * | 2010-11-23 | 2012-07-11 | 西门子公司 | Switch, especially for low voltage circuit breaker |
| US10770533B2 (en) | 2015-12-31 | 2020-09-08 | Lg Display Co., Ltd. | Organic light emitting diode display panel having pads disposed at different distances from an edge and organic light emitting diode display device having the same |
| CN108630506A (en) * | 2017-11-14 | 2018-10-09 | 佳电气有限公司 | Bypass module and leakage circuit breakers for leakage circuit breakers |
| CN108630506B (en) * | 2017-11-14 | 2024-11-22 | 佳一电气有限公司 | Bypass module for residual current circuit breaker and residual current circuit breaker |
| CN110444446A (en) * | 2018-05-06 | 2019-11-12 | 天津市中力神盾电子科技有限公司 | A miniature circuit breaker |
| CN111063586A (en) * | 2018-10-17 | 2020-04-24 | 天津市中力神盾电子科技有限公司 | a composite switch |
| CN109659203A (en) * | 2018-12-24 | 2019-04-19 | 厦门宏发开关设备有限公司 | A kind of miniature circuit breaker abnormal protection device and miniature circuit breaker |
| CN110289198A (en) * | 2019-07-26 | 2019-09-27 | 贵州泰永长征技术股份有限公司 | A kind of current limliting and quick disjunction structure of miniature circuit breaker |
| CN110289198B (en) * | 2019-07-26 | 2024-03-01 | 贵州泰永长征技术股份有限公司 | Current limiting and quick breaking structure of miniature circuit breaker |
| CN112786400A (en) * | 2019-11-07 | 2021-05-11 | 余姚市嘉荣电子电器有限公司 | Separated permanent-magnet leakage protector |
| CN111370265A (en) * | 2020-04-10 | 2020-07-03 | 未彬 | Contactor structure |
| CN111370265B (en) * | 2020-04-10 | 2022-02-01 | 常州天利智能控制股份有限公司 | Contactor structure |
| CN113237678A (en) * | 2021-04-16 | 2021-08-10 | 德基申（厦门）电气有限公司 | Method and equipment for testing mechanical function of circuit breaker |
| CN115206743A (en) * | 2022-08-26 | 2022-10-18 | 天津加美特电气股份有限公司 | Electromagnetic leakage circuit breaker adopting leakage current relay to replace EMR |
| CN115206743B (en) * | 2022-08-26 | 2024-03-22 | 天津加美特电气股份有限公司 | Electromagnetic leakage circuit breaker adopting leakage current relay to replace EMR |
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