CN2609162Y - Monolithic program controlled AC contactor - Google Patents
Monolithic program controlled AC contactor Download PDFInfo
- Publication number
- CN2609162Y CN2609162Y CN 03229004 CN03229004U CN2609162Y CN 2609162 Y CN2609162 Y CN 2609162Y CN 03229004 CN03229004 CN 03229004 CN 03229004 U CN03229004 U CN 03229004U CN 2609162 Y CN2609162 Y CN 2609162Y
- Authority
- CN
- China
- Prior art keywords
- contact
- arc
- contactor
- coil
- control
- 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
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The utility model relates to a uniwafer programmed control alternating current contactor, pertaining to the electric control equipment field. The uniwafer programmed control alternating current contactor of the utility model comprises an upper shell, a main base, a bottom box and a bottom board. The utility model is characterized in that three groups of switching mechanisms provided with a break back contact, a moving contact and a break arc contact; a movable contact spring with a moving contact and an arc spring are respectively connected on the rotary rotating shaft frame on the bearing board; the other end of the arc spring plugs in and is fixed in the upper bayonet of the push board which can move up and down and is provided with a reset button; a magnetic lock driving mechanism is arranged in the main base, and comprises a coil and a gag bit arranged in the coil, wherein, one end of the gag bit is plugged in and is fixed in the lower bayonet of the push board; a uniwafer programmed control circuit is arranged in the bottom box, and comprises a system control power source supplied to the special mask type uniwafer of the solidified programmer. The utility model has the advantages of resisting flowing, no voltaic arc on off and prolonging the service life.
Description
Technical field
The utility model relates to the program control A.C. contactor of a kind of monolithic, can be widely used in dump, three-phase electric apparatus control, the three-phase protective switch of three-phase IC-card electric energy meter, connects the electric equipment that exchanges main circuit and big volume controlled circuit with disjunction continually.Its major control also can be used as electrical loads such as control electroheat equipment, electric lighting, electric welding machine and capacitor group to liking motor.The utility model belongs to the electrical control equipment field.
Background technology
The three-phase ac contactor that existing tradition is used, its volume is bigger, need when excitatory coil is powered for a long time, thereby coil adhesive energy consumption is big, and winding is often burnt out.During load is connected, alternating current is zero passage, phase shift accurately, the contact of adding contactor is under the mechanical type spring action, response force is inconsistent, can not contact synchronously, thereby produce tens of times of surge currents, cause main contact melting welding, mains by harmonics excessive, even can cause in electric power, the electrical system many automatic control equipments malfunctioning, lead to electric power accident.
The main contact of contactor disconnect moment can not separated in synchronization, minimum because of the contact distance, electric field strength is very big, produce a large amount of charged corpuscles between contact, form scorching hot electron stream, produce the arc discharge phenomenon, electric arc can make the contact burn, also can make circuitry cuts time lengthening, and it is very harmful.Though adopt arc-extinguish chamber, arc-chute can play certain blow-out effect, also be prone to because of multiple reason and cause arc short-circuit.Wherein inappropriate with the blow-out time serves as maximum.This powerful short circuit current burns A.C. contactor, the short-circuiting device tripping operation, even cause distribution power supply unit breaking-up accident.
Now, most hybrid AC contactors, zero passage switch, no arc switching device and with the sub-assembly of the traditional contactor of Single-chip Controlling etc., their common feature is: use single-chip microcomputer (non-maskization, program are solidified) to control thyristor module usually, or wait with additional Digital Logical Circuits (being cmos circuit) and power electronic element such as thyristor and to realize the electronics arc extinguishing, bear the transient process of conventional AC contactor forceful electric power circuit, after treating that transient process finishes, put into operation by the conventional AC contactor, and power electronic element is out of service.
The drawback of above-mentioned these modes is: single-chip microcomputer of (1) uncured program and cmos circuit functional reliability under industrial work condition environment is relatively poor, and intelligent degree is not high.(2) gone to control an integral body of conventional AC contactor by incorporate electronics arc extinguishing controller, such assembly is installed and is used inconvenient.(3) can not energy-saving run, silent running; And volume is big, the cost height.(4) need select parts such as the two contacts of bridge-type, arc-extinguish chamber, arc control device, mechanical spring for use; Do not have arcing contact and do not have the bistable magnetic latch function.
Summary of the invention
The purpose of this utility model provides the program control A.C. contactor of a kind of incorporate monolithic, the two contacts of the conventional bridge-type of using of abandoning tradition contactor, arc-extinguish chamber, arc control device and mechanical spring, improve security reliability, realize highly sensitive synchronous contact, separated in synchronization, the anti-electric arc break-make of shoving, go out.Another purpose of the present utility model provides the single-chip microcomputer program control technology and makes thyristor, relay, the intellectuality of contactor control circuit.
The purpose of the program control A.C. contactor of the utility model monolithic reaches by following means and measure.
The program control A.C. contactor of the utility model monolithic includes the mechanical structure part and the single-chip microcomputer programme control circut part of its body.Body mechanical structure partly includes upper casing, the seat of honour, end box and base plate.Both sides respectively have three and the corresponding screw hole of the fastening terminal of wiring before and after above the upper casing; The contact switching mechanism is housed above the seat of honour, the magnetic padlock driving mechanism also is housed in inside; The program control control circuit of monolithic is housed in the end box; Base plate has the galvanized iron sheet of gap slot for the both sides, front and back, and also has each several part is linked to be the threaded apertures that the whole long spiro nail that vertically runs through connects fastening usefulness, it is characterized in that:
A. the structure of the contact switching mechanism that is provided with above of the seat of honour is: the rotating shaft frame is movably connected on the support plate of seat of honour two side with the bearing pin at two ends, in the middle of the rotating shaft frame rear portion rectangle aperture stretch out and be provided with a bottom connect armature, top has the draw back plate of reset button; The fixed contact assembly of contact switching mechanism includes fixed contact and the arc fixed contact on the stairstepping copper frame; The moving contact assembly includes and is contained in the arc reed that has the movable contact spring of moving contact on the rotating shaft frame and have the arc moving contact, and the arc reed is connected with draw back plate top;
B. the magnetic padlock driving mechanism of the inside of seat of honour setting is: it includes the magnet steel of clamping between two yokes and is with the skeleton of armature, coil, and the yoke outside also is connected with magnetic shield panel; One end of armature is connected with the lower end of draw back plate; The skeleton hollow space that is wound with coil be inserted with have copper stent, two ends can be around the rectangular armature of middle pivot pin rotary oscillation;
C. the structure of the program control control circuit of monolithic that is provided with in the end box is: adopt anti-interference strong system control power supply, for its control acp chip, i.e. the mask-type single-chip microcomputer work that contactor special use, program have been solidified; Be provided with the combination of the special-purpose thick film sheet of contactor ASIC1, ASIC2 and peripheral drive circuit; Utilizing single-chip microcomputer to produce pulse width modulated wave control zero passage optocoupler triggering thyristor opens and turn-offs; Drive the coil motion of relay, contactor simultaneously; And constitute magnetic loop by armature, yoke, magnet steel, coil; Add that with the small-sized magnetic padlock relay of heavy load of low power thyristor and band arc contact high-power switching circuit dedicated capacitor and piezo-resistance form dynamo-electric synthesizer; Three-phase antisurge magnetic padlock contactor, magnetic padlock heavy load relay are set.
The advantage and the good effect of the program control A.C. contactor of the utility model single-chip microcomputer are as described below:
(1) do not adopt parts such as the two contacts of employed bridge-type, arc-extinguish chamber, arc control device and mechanical spring in traditional contactor, but the main contact switching mechanism of the energy antisurge of employing main contact, arc contact composition, the big electric current of load, no arc spark, so contactor is shock-resistant, reliable in action, working stability, long service life.
(2) the program control A.C. contactor of single-chip microcomputer is integrated, its compact conformation, and volume is little, and can realize highly sensitive synchronous contact, separated in synchronization, anti-ly shoves, do not have the electric arc break-make.
(3) have the bistable magnetic latch function, be provided with the magnetic padlock structure that constitutes flux circuit, keep the magnetic padlock state, thus do not need during excitation for a long time to reduce coil adhesive energy consumption to coil power supply, but saves energy.
(4) adopt single-chip microcomputer programme control circut system, make thyristor, relay, the intellectuality of contactor control circuit; Complete thyristor, capacitor, arcing contact, main contact modularization; Product architecture modularizationization.
Description of drawings
Fig. 1 is a perspective view of the present utility model.
Fig. 2 is the schematic perspective view of contact switching mechanism in the utility model.
Fig. 3 is a dynamic and static contact assembly structural representation in the utility model.
Fig. 4 is an auxiliary contact modular construction schematic diagram in the utility model.
Fig. 5 is a magnetic padlock structural representation in the utility model.
Fig. 6 is a magnetic padlock Drive Structure schematic diagram in the utility model.
Fig. 7 is a user mode reference diagram of the present utility model, and wherein a is the contact off-state, and b is a contact closure condition.
Fig. 8 is the utility model monolithic stored program controlled circuit diagram.
Fig. 9 is the dynamo-electric condensating synthesizering circuit figure in the utility model monolithic stored program controlled.
Embodiment
Now in conjunction with the accompanying drawings and embodiments, the utility model is described in further detail.
Embodiment one: referring to Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6 and Fig. 7, the program control A.C. contactor of a kind of monolithic of the present utility model includes the mechanical structure part and the single-chip microcomputer programme control circut part of its body; The mechanical structure of body partly includes upper casing 1, the seat of honour 7, end box 8 and base plate 9; Both sides respectively have three and the fastening terminal 5 corresponding screw holes of wiring (L1, L2, L3 line and T1, T2, T3 line promptly insert at this fastening terminal) before and after above the upper casing 1; The contact switching mechanism is housed above the seat of honour 7, the magnetic padlock driving mechanism also is housed in inside; The program control control circuit of monolithic is housed in the end box 8; Base plate 9 has the galvanized iron sheet of gap slot for the both sides, front and back, and also has each several part is linked to be the threaded apertures that the whole long spiro nail that vertically runs through connects fastening usefulness.
The structure of the contact switching mechanism that the seat of honour 7 is provided with above is: the bearing pin at rotating shaft frame 4 usefulness two ends is movably connected on the support plate 6 of the seat of honour 7 two sides, in the middle of rotating shaft frame 4 rear portions rectangle aperture stretch out and be provided with a bottom be connected with armature 26, top has the draw back plate 3 of reset button 2; The fixed contact assembly of contact switching mechanism includes fixed contact 12 and the arc fixed contact 14 on the stairstepping copper frame 13; The moving contact assembly includes and is contained in movable contact spring 21 that has moving contact 20 on the rotating shaft frame and the arc reed 19 that has arc moving contact 18, and arc reed 19 is connected with the long and narrow aperture bayonet socket that draw back plate 3 tops have.Have that the upper and lower respectively has a long and narrow aperture bayonet socket on the plate of draw back plate 3 of reset button 2, the middle part has a bigger rectangle square hole; The long and narrow aperture bayonet socket in top inserts and is connected with the arc reed 19 that has arc moving contact 18, the long and narrow aperture bayonet socket in bottom inserts and is connected with the armature 26 of the skeleton 28 that has coil 29, inserts the moving other end (referring to Fig. 3 and Fig. 6) of drawing terminal block 10 that an end is connected with copper wire braid 11 in the rectangle square hole of middle part.Three groups can by fastening terminal 5 connect leads quiet draw terminal block 15 and moving draw terminal block 10 respectively by screw in three major troughs of the seat of honour 7 two ends.Fixed contact 12 and arc fixed contact 14 are weldingly fixed on the stairstepping copper frame 13 in the fixed contact assembly, and copper frame 13 is fixed on a quiet end of drawing terminal block 15.In the moving contact assembly, drive the movable contact spring of contact 20 and the arc reed 19 of band arc moving contact 18, by screw on the lower surface of rotating shaft frame 4.The end in addition of movable contact spring 21 is welded with the copper wire braid 11 that is flexible coupling, and the other end of copper wire braid 11 then is connected with moving medial extremity of drawing terminal block 10.In the auxilliary groove on the seat of honour 7 support plates 6 next doors, promptly the left side outermost also be provided with by the push rod 17 that is connected with rotating shaft frame 4 bearing pins move up and down control often open auxiliary contact 16 and normally closed auxiliary contact 22 (referring to Fig. 4).
The magnetic padlock driving mechanism that the inside of the seat of honour 7 is provided with is: it includes the magnet steel 25 of 24 clampings of two " " shape yoke and is with the skeleton 28 of armature 26, coil 29, for preventing the magnetic diffusion and strengthen magnetic flux density that yoke 24 also has the magnetic shield panel 23 of box-like; Be around with 28 liang on the skeleton of coil 29 and be embedded with copper stent 27 in the middle of inboard, strip armature 26 places in the skeleton 28, is connected with through hole on the copper frame 27 with the pivot pin of its centre, both sides, thereby can makes armature 26 two ends around fulcrum pivot pin rotary oscillation (referring to Fig. 5).
Magnetic pin driver mechanism places in the housing 30, and with screw housing 30 is fixed on the lower surface of the seat of honour 7.
During use, when giving direct impulse of coil 29 inputs, the armature 26 in the skeleton 28 resembles seesaw and rotates around copper stent 27 fulcrums, and upset constitutes flux circuit to the another location by a position, referring to Fig. 7 a.Armature 26 is by joining draw back plate 3 pulling rotating shaft framves 4 simultaneously, and drive movable contact spring 21, arc reed 19 thus, make moving contact 20 on it, arc moving contact 18 break away from fixed contacts 12, arc fixed contact 14, treat direct impulse after, still keep this magnetic padlock state, be called forward and latch.
If when giving reverse impulse of coil 29 inputs, the armature 26 in the skeleton 28 returns the origin-location and constitutes magnetic loop, referring to Fig. 7 b.Simultaneously armature 26 drives draw back plates 3, rotating shaft frame 4 is rotated, and drive movable contact spring 21, arc reed 19 thus, makes moving contact 20,18 contacts of arc moving contact on it closed, treat reverse impulse after, still keep this magnetic padlock state, be called oppositely and latch.So just finished one and deposited the process that reverse magnetic padlock is deposited that is transformed into, constantly repeated said process, made contactor constantly finish the break-make task from the forward magnetic padlock.
The program control control circuit system of monolithic that is provided with in the end box 8 referring to Fig. 8 and Fig. 9, realizes that by low-loss, low temperature rise, noiselessness, microminiature 3WR type transformer strong and weak electricity is isolated, voltage transformation (the transformer T among Fig. 8).The interchange 14V voltage of transformer output, through the UR single-phase bridge rectification, R1, R2, C7, C8, the towering type filter circuit of C9 divide the two-way output dc voltage excessively, i.e. A road and B road.The A road is divided into two-way A (1) and A (2) again.A (1) to C1, C2 charging and energy storage, drives KA line bag power supply for H1 bridge in the special-purpose thick film (ASIC1) by the D1 isolating diode.A (2) to C3, C4 charging and energy storage, drives KM line bag power supply for H2 bridge in the special-purpose thick film (ASIC1) by the D2 isolating diode.B delivers on the road 7812 voltage stabilizing circuits, crosses the D3 isolating diode to C5 charging and energy storage, output 11.3V.Its (1) gives special-purpose thick film (ASIC2), zero passage optocoupler, open-phase protection circuit power supply.Its (2) cross the D4 isolating diode to C6 charging and energy storage output 5.3V through 7,806 twice voltage stabilizing, make single-chip microcomputer governor circuit power supply.
R3, R4, R5, DZ, ASIC2 constitute o-volt protection function (promptly disappearing or be reduced to certain value at supply voltage automatically resets when following, and contact discharges).RV1, RV2, PTC make circuit have overvoltage, overcurrent protection.R6, R7, R8, D5, C10, PC1 composition phase shortage, thyristor circuit, contact circuit detect.
R9, R10, R11, C11, C12, C13, RV3, RV4, RV5 are that thyristor protection absorbs circuit among Fig. 9, again the contact instantaneous high pressure high current (rated current 4/5) of relay, contactor are protected absorption simultaneously.Excessive for the restricting circuits voltage build-up rate, guarantee thyristor, relay safe operation, absorb network in thyristor, relay contact two ends RC capacitance-resistance in parallel, the characteristic of utilizing the electric capacity both end voltage not suddenly change is come the deboost climbing.Because always there is inductance (transformer inductance, load inductance) in circuit, so can play damping action with capacitor C series resistance R.It can prevent R, L, C circuit in filter process, because of the overvoltage that concussion occurs at the capacitor two ends is damaged thyristor, relay.Single-chip microcomputer sequential and control circuit are that single-chip microcomputer (hardware) and program (software) are finished pulse signal jointly.Executive agent is thyristor, magnetic padlock heavy load relay, magnetic padlock heavy load contactor.According to characteristics, the character of alternating current, single-chip microcomputer sequential and control circuit not only from time arrangement make and break period, and are further sought an only cutting point from order, shove, do not have being switched on or switched off of electric arc, no harmonic wave thereby real realization resists.
Claims (3)
1. program control A.C. contactor of monolithic includes the mechanical structure part and the single-chip microcomputer programme control circut part of its body; The mechanical structure of body partly includes upper casing (1), the seat of honour (7), end box (8) and base plate (9); Both sides respectively have three and the corresponding screw hole of the fastening terminal of wiring (5) before and after above the upper casing (1); The seat of honour is equipped with the contact switching mechanism above (7), and the magnetic padlock driving mechanism also is housed in inside; The program control control circuit of monolithic is housed in the end box (8); Base plate (9) has the galvanized iron sheet of gap slot for the both sides, front and back, and also has each several part is linked to be the threaded apertures that the whole long spiro nail that vertically runs through connects fastening usefulness, it is characterized in that:
A. the structure of the electric shock switching mechanism that is provided with above of the seat of honour (7) is: rotating shaft frame (4) is movably connected on the support plate (6) of the seat of honour (7) two side with the bearing pin at two ends, stretch out on the rectangle aperture in the middle of rotating shaft frame (4) rear portion and be provided with a bottom connect armature (26), top has the draw back plate (3) of reset button (2); The fixed contact assembly of contact switching mechanism includes fixed contact (12) and the arc fixed contact (14) on the stairstepping copper frame (13); The moving contact assembly includes and is contained in movable contact spring (21) that has moving contact (20) on the rotating shaft frame (4) and the arc reed (19) that has arc moving contact (18), and arc reed (19) is connected with draw back plate (3) top;
B. the magnetic padlock driving mechanism of the inside of the seat of honour (7) setting is: it includes the magnet steel (25) of clamping between two yokes (24) and is with the skeleton (28) of armature (26), coil (29), and yoke (24) outside also is connected with magnetic shield panel (23); One end of armature (26) is connected with the lower end of draw back plate (3); The skeleton that is wound with coil (29) (28) hollow space be inserted with have copper stent (27), two ends can be around the rectangular armature (26) of middle pivot pin rotary oscillation;
C. the structure of the program control control circuit of monolithic that is provided with in the end box (8) is: adopt anti-interference strong system control power supply, for its control acp chip, i.e. the mask-type single-chip microcomputer work that contactor special use, program have been solidified; Be provided with the combination of the special-purpose thick film sheet of contactor ASIC1, ASIC2 and peripheral drive circuit; Utilizing single-chip microcomputer to produce pulse width modulated wave control zero passage optocoupler triggering thyristor opens and turn-offs; Drive the coil motion of relay, contactor simultaneously; And constitute magnetic loop by armature, yoke, magnet steel, coil; Add that with the small-sized magnetic padlock relay of heavy load of low power thyristor and band arc contact high-power switching circuit dedicated capacitor and piezo-resistance form dynamo-electric synthesizer; Three-phase antisurge magnetic padlock contactor, magnetic padlock heavy load relay are set.
2. the program control A.C. contactor of a kind of monolithic according to claim 1 is characterized in that, described top has the draw back plate (3) of reset button (2), and the upper and lower respectively has a long and narrow aperture bayonet socket on the plate, and the middle part has a bigger rectangle square hole; The long and narrow aperture bayonet socket in top inserts and is connected with the arc reed (19) that has arc moving contact (18), the long and narrow aperture bayonet socket in bottom inserts and is connected with the armature (26) in the skeleton (28) that has coil (29), inserts the moving other end of drawing terminal block (10) that an end is connected with copper wire braid (11) in the rectangle square hole of middle part.
3. the program control A.C. contactor of a kind of monolithic according to claim 1, it is characterized in that, the contact switching mechanism that the seat of honour (7) top is provided with also is provided with by what the push rod (17) that is connected with rotating shaft frame (4) bearing pin moved up and down control in the left side outermost and often opens auxiliary contact (16) and normally closed auxiliary contact (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03229004 CN2609162Y (en) | 2003-02-25 | 2003-02-25 | Monolithic program controlled AC contactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03229004 CN2609162Y (en) | 2003-02-25 | 2003-02-25 | Monolithic program controlled AC contactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2609162Y true CN2609162Y (en) | 2004-03-31 |
Family
ID=34164646
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03229004 Expired - Fee Related CN2609162Y (en) | 2003-02-25 | 2003-02-25 | Monolithic program controlled AC contactor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2609162Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101442191B (en) * | 2007-11-23 | 2011-09-07 | 浙江正泰电器股份有限公司 | Contactor with peripheral surge restraining unit |
| CN101546670B (en) * | 2009-04-30 | 2012-01-04 | 淮南市启迪电子有限公司 | Zero current disjunction AC vacuum contactor |
| CN103197107A (en) * | 2012-01-09 | 2013-07-10 | 德昌电机国际（英国）有限公司 | Contactor and meter assembly, and contactor and wall box assembly |
| CN104157490A (en) * | 2014-08-27 | 2014-11-19 | 武汉长海电气科技开发有限公司 | High-voltage direct current contactor contact system |
| CN104885180A (en) * | 2012-12-21 | 2015-09-02 | 松下知识产权经营株式会社 | Blinking device |
| WO2021122552A1 (en) * | 2019-12-17 | 2021-06-24 | Tyco Electronics (Shenzhen) Co. Ltd . | Auxiliary contact system of contactor |
| US12142446B2 (en) | 2019-12-17 | 2024-11-12 | Tyco Electronics (Shenzhen) Co., Ltd. | Auxiliary contact system of contactor |
-
2003
- 2003-02-25 CN CN 03229004 patent/CN2609162Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101442191B (en) * | 2007-11-23 | 2011-09-07 | 浙江正泰电器股份有限公司 | Contactor with peripheral surge restraining unit |
| CN101546670B (en) * | 2009-04-30 | 2012-01-04 | 淮南市启迪电子有限公司 | Zero current disjunction AC vacuum contactor |
| CN103197107A (en) * | 2012-01-09 | 2013-07-10 | 德昌电机国际（英国）有限公司 | Contactor and meter assembly, and contactor and wall box assembly |
| CN104885180A (en) * | 2012-12-21 | 2015-09-02 | 松下知识产权经营株式会社 | Blinking device |
| CN104885180B (en) * | 2012-12-21 | 2018-03-09 | 松下知识产权经营株式会社 | Point off device |
| CN104157490A (en) * | 2014-08-27 | 2014-11-19 | 武汉长海电气科技开发有限公司 | High-voltage direct current contactor contact system |
| WO2021122552A1 (en) * | 2019-12-17 | 2021-06-24 | Tyco Electronics (Shenzhen) Co. Ltd . | Auxiliary contact system of contactor |
| US12142446B2 (en) | 2019-12-17 | 2024-11-12 | Tyco Electronics (Shenzhen) Co., Ltd. | Auxiliary contact system of contactor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN2609162Y (en) | Monolithic program controlled AC contactor | |
| CN101114557A (en) | Safety circuit breaker | |
| CN201860115U (en) | AC capacitor fling-cut switch circuit | |
| CN100490043C (en) | Permanent magnet non-arching AC contactor | |
| CN106786013B (en) | Low-pressure multi-functional safeguard protection distribution box | |
| CN211859601U (en) | Direct current cuts device soon | |
| CN101980348A (en) | Alternating current contact with soft-start and non-arc make-and-break functions | |
| CN2750508Y (en) | Waterproof leakage protection plug | |
| CN1242443C (en) | Controller for electromagnetic system of universal contactor | |
| CN208401531U (en) | A kind of monitor-type overvoltage protection | |
| CN202872457U (en) | Mechanical-electronic mixing type dual-supply automatic change-over switch | |
| CN113037177A (en) | Reversible operation control circuit of motor | |
| CN2596535Y (en) | Controller of general contactor electromagnetic system | |
| CN201038084Y (en) | Permanent magnetism no-arc AC contactor | |
| CN2285512Y (en) | Arcless ac relay contactor | |
| Cheng et al. | A DC Power Connector with Voltage Spike Suppression | |
| CN212112195U (en) | Contactless contactor | |
| CN2192101Y (en) | AC static disposition protective switch controller | |
| CN2739783Y (en) | Voltage-clamping shunt direct-off circuit breaker using diode | |
| JP2603662B2 (en) | Circuit protector | |
| CN1271955A (en) | Long-service silver-saving switch appliance with arc transfer contact | |
| CN2216307Y (en) | Multifunctional control cabinet for load shunt switch | |
| CN2388758Y (en) | AC/DC integral field-discharge over-voltage protection for generator rotor | |
| CN2181084Y (en) | AC and dc electric magnet operation controlling box | |
| JPH03129614A (en) | Switch gear for high tension load |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |