CN104505806A - Self-recovery over-voltage and under-voltage protector - Google Patents
Self-recovery over-voltage and under-voltage protector Download PDFInfo
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- CN104505806A CN104505806A CN201510006872.3A CN201510006872A CN104505806A CN 104505806 A CN104505806 A CN 104505806A CN 201510006872 A CN201510006872 A CN 201510006872A CN 104505806 A CN104505806 A CN 104505806A
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Abstract
The invention discloses a self-recovery over-voltage and under-voltage protector. The technical scheme is that a fixed contact and a spring tongue contact of the contact portion are pulled in or separated under control of a regulation mechanism. A rotary shaft portion is hinged to one side of the spring tongue contact close to a moving contact mounting base and is fixed at the bottom of the inner side of a casing. A torsion elastic part used for tilting the spring tongue contact is sleeved on the rotary shaft portion, and the other end of the spring tongue contact extends below the fixed contact. The spring tongue contact has large enough contract final pressure under the effect of the torsion elastic part so when the over-voltage state occurs during use, the distance between the spring tongue contact and the fixed contact is large, so voltage strength exerted between the spring tongue contact and the fixed contact by the external circuits are not large enough to break down air between the spring tongue contact and the fixed contact, accordingly arcs are not easy to generate, melting and adhesion of the spring tongue contact and the fixed contact caused by fusion welding or ablation of the contact portion is avoided, and explosion caused by protector failure or small separation as well as insufficient final pressure of the contacts is prevented.
Description
Technical field
The present invention relates to electric switch technical field, more particularly, it relates to a kind of Self-recover overvoltage-undervoltage protector.
Background technology
Self-recover overvoltage-undervoltage protector control circuit adopts that high speed micro-low power consumption processor is core, magnetic latching relay is main circuit, modularization standard design, Self-recover overvoltage-undervoltage protector have line over-voltage, under voltage protection function and line voltage distribution normal after time-delay reset function.Be mainly used in the protection of the distribution line of Separate Home case inlet wire or protection single-phase electric devices.Its mounting means is the same with miniature circuit breaker is guide rails assembling, and the mode of connection and side view are also similar to miniature circuit breaker.When there is overvoltage, under voltage in supply line; protector can cut off circuit rapidly, safely under continuous high-pressure impacts; avoid the generation that abnormal voltage feeding terminal appliance causes the accident; when voltage resume normal value; protector incites somebody to action automatic processing circuit at the appointed time, guarantees that terminal appliance normally runs in unattended operation situation.
Self-recover overvoltage-undervoltage protector includes shell, circuit part and contact apparatus, contact apparatus includes contact part and for the governor motion controlling contact part adhesive or separate, existing contact apparatus is all adopt magnetic latching relay to realize connection and the disconnection of contact, magnetic latching relay is by the adhesive of two contacts or the effect separating realizing circuit control by magnet, because the magnetic force of magnet is limited, thus limit contact part and cannot accomplish enough large clearance between open contacts, if opening apart from comparatively large of relay, cannot realize automatically reseting, so when overvoltage disconnects main circuit, micro-disconnected state is between two contacts, during micro-disconnected state, the spacing of two contacts is less, thus under overvoltage condition because the open circuit voltage between two contacts will be larger, so just very easily puncture the air between two contacts, thus cause the generation of electric arc, tradition magnetic latching relay adopts the magnetic force of permanent magnet to provide end pressure simultaneously, thus easily there is the problem that contact terminate pressure is inadequate, but in normal use procedure, the problem that contact terminate pressure will cause contact acutely to be shaken not, because the shake of contact will cause repeatedly cut-offfing of the circuit of contact part, so will cause the generation of electric arc (namely occurring drawing the problem of electric arc between contact), contact will be there is melt adhesion under the effect of electric arc, the long-time conducting of two contacts, protector lost efficacy and makes equipment be in the state of overlond running for a long time thus cause the problem of device damage, also very easily occur that protector main circuit part is exploded because of the high temperature of electric arc simultaneously, and then the problem of initiation fire.Can not cause electric control component failure or because opening apart from little, the contact terminate pressure blast produced not for can bear withstand current, what need contact part opens apart from being greater than safety index, and therefore tradition magnetic latching relay cannot reach this effect.
Although in Self-recover overvoltage-undervoltage protector, existing circuit part is disclosed testing circuit simultaneously; whether this testing circuit is under-voltage for detecting voltage; thus control contact apparatus is in trip status or closure state; but Self-recover overvoltage-undervoltage protector of the prior art directly cannot show voltage value; be not easy to man-machine interaction; on housing, do not set up test button, be not easy to detect Self-recover overvoltage-undervoltage protector and whether be in normal operating state yet.
Summary of the invention
For prior art exist deficiency, the object of the present invention is to provide a kind of strengthen clearance between open contacts and be convenient to detect Self-recover overvoltage-undervoltage protector.
For achieving the above object, the invention provides following technical scheme: a kind of Self-recover overvoltage-undervoltage protector, include shell, circuit part and contact apparatus, described contact apparatus includes contact part and for the governor motion controlling contact part adhesive or separate, described contact part includes stationary contact head and moving contact portion, described stationary contact head includes fixed contact and fixed contact mount pad, described fixed contact and the electrical connection of fixed contact mount pad, the bullet tongue contact that described moving contact portion includes moving contact mount pad and can fit with fixed contact or separate, described bullet tongue contact one end is electrically connected with moving contact mount pad, the described bullet tongue contact other end extends to fixed contact side, described governor motion is for controlling to play the adhesive of tongue contact and fixed contact or separating, described bullet tongue contact is hinged with shaft near moving contact mount pad side, described shaft is fixed on shell inside bottom, described shaft is arranged with for the torsion elastic component by playing the tilting of tongue contact, the other end of described bullet tongue contact extends to below fixed contact.
By adopting technique scheme, play tongue contact to tilt under the active force of torsion elastic component, and fixed contact of fitting of conflicting, realizing circuit loop, and play tongue contact and have enough large contact terminate pressure under the active force of torsion elastic component, guarantee the stability of on-state, control by governor motion the motion playing tongue contact when open circuit, bullet tongue contact is made to depart from fixed contact, in this structure, opening of contact part realizes regulating apart from the length by controlling to play tongue contact, play tongue contact longer, governor motion its ends points displacement when control plays tongue contact is larger, therefore play that this structure of tongue contact can make it with fixed contact to open distance larger, be greater than safety index, when in use there is overvoltage condition, the distance played between tongue contact and fixed contact is larger, so external circuit is applied to the voltage strength played between tongue contact and fixed contact and just can not punctures its air between the two, thus be just not easy to produce electric arc, nature contact part also melting welding or ablation can not make to play tongue contact and melts bonding with fixed contact, thus avoid protector lost efficacy or because opening apart from little, the contact terminate pressure blast produced not, the fire even caused because of blast, effectively improve the usage safety performance of protector.
The present invention is set to further: described governor motion includes motor, and the output of described motor is provided with and the eccentric wheel playing tongue contact and conflict.
By adopting technique scheme, when overvoltage, under voltage appear in supply line, circuit part controls electric motor starting, and band movable eccentric wheel turns clockwise, conflict bullet tongue contact of camshaft major radius one end makes it be pressed downwardly, thus plays tongue contact and be separated with fixed contact; During reset, circuit part controls electric motor starting, band movable eccentric wheel is rotated counterclockwise, camshaft short radius one end is towards torsion elastic component, remove the pressing force acting on and play on tongue contact, play tongue contact to be upturned under the active force of torsion elastic component and fixed contact of fitting of conflicting, realizing circuit loop simultaneously.This bullet tongue contact coordinates by motor and torsion elastic component the folding realizing contact part; because motor drives eccentric active force larger also more stable; thus it is also more reliable and stable by the action of eccentric wheel control bullet tongue contact; avoid the situation that cannot realize comparatively greatly resetting because opening distance; make the control of bullet tongue contact more reliable and stable, be conducive to protector in working order time use safety stablize.
The present invention is set to further: be provided with the limiting section for preventing fixed contact movement inside described shell.
By adopting technique scheme, utilize limiting section to be stabilized in by fixed contact and play directly over tongue contact end, not only can strengthen the installation soundness of fixed contact, be convenient to play when tongue contact resets and precisely can fit with fixed contact, and play tongue contact to be upturned under the active force of torsion elastic component, not easily produce displacement after fitting with fixed contact, make the connection of contact part more firm.
The present invention is set to further: described circuit part comprises:
Control circuit: be coupled with reset button and test button, to receive reset signal or stimulus, and exports corresponding reset instruction signal or TD signal;
Reset, hookup: be coupled to control circuit, to receive reset instruction signal or TD signal, and export corresponding homing action signal or test actuating signal, be also coupled to motor, rotate to carry out drive motors according to homing action signal or test actuating signal;
Over under-voltage protection circuit: be coupled to external power source, to receive real-time voltage signal, and output overvoltage signal or under-voltage signal, be also coupled to control circuit, so that overvoltage signal or under-voltage signal are sent to control circuit;
Wherein, when reset, hookup output test actuating signal, motor turns clockwise, contact apparatus is threaded off, and when reset, hookup export homing action signal, motor is rotated counterclockwise, contact apparatus closes, when control circuit receives overvoltage signal or under-voltage signal, motor turns clockwise, and contact apparatus is threaded off.
By adopting technique scheme, when pressing test button, control circuit can receive stimulus, and output test command signal is to reset, hookup, and motor is rotated counterclockwise, and contact apparatus is threaded off; When pressing reset button, control circuit will receive reset signal, and exports reset instruction signal to reset, hookup, and motor is turned clockwise, contact apparatus closes, and detects Self-recover overvoltage-undervoltage protector and can its contact apparatus normally work with this; If overvoltage or the situation such as under-voltage appear in external power source, over under-voltage protection circuit produces overvoltage signal or under-voltage signal and is sent to control circuit, and control circuit controls motor and turns clockwise, and contact apparatus is threaded off, reaches with this object that overvoltage/undervoltage protects.
The present invention is set to further: described control circuit is also coupled with the display that can show real-time voltage signal.
By adopting technique scheme, display is coupled to control circuit to show real-time voltage numerical value, is convenient to man-machine interaction.
Accompanying drawing explanation
Fig. 1 is the structural representation of Self-recover overvoltage-undervoltage protector of the present invention;
Fig. 2 is the A portion structure for amplifying schematic diagram of Fig. 1;
Fig. 3 is the perspective view of partial shell;
Fig. 4 is the schematic diagram of reset, hookup;
Fig. 5 is the schematic diagram of control circuit;
Fig. 6 is the schematic diagram of over under-voltage protection circuit.
Reference numeral: 1, shell; 11, shaft; 111, torsion elastic component; 12, limiting section; 2, contact part; 21, stationary contact head; 211, fixed contact; 212, fixed contact mount pad; 22, moving contact portion; 221, tongue contact is played; 222, moving contact mount pad; 3, governor motion; 31, motor; 32, eccentric wheel; S1, stimulus; S2, reset signal; TurnR, reset instruction signal; TurnL, TD signal; U Input, overvoltage signal or under-voltage signal; M1, the first contact group; M2, the second contact group; Q4, the 4th NPN triode; Q5, the 5th NPN triode; Q6, the 6th NPN triode; Q7, the 7th NPN triode; D1, the first diode; E1, the first electrochemical capacitor; U1A, comparator; DS1, display.
Embodiment
Referring to figs. 1 through Fig. 6, Self-recover overvoltage-undervoltage protector embodiment of the present invention is described further.
A kind of Self-recover overvoltage-undervoltage protector, include the shell 1 roughly arranged in rectangular structure, circuit part and the contact apparatus for realizing circuit break-make is provided with in shell 1, contact apparatus includes contact part 2 and for the governor motion 3 controlling contact part 2 adhesive or separate, contact part 2 includes the stationary contact head 21 and moving contact portion 22 that are located at shell 1 both sides respectively, stationary contact head 21 includes fixed contact 211 and fixed contact mount pad 212, fixed contact 211 and fixed contact mount pad 212 are electrically connected, the bullet tongue contact 221 that moving contact portion 22 includes moving contact mount pad 222 and can fit with fixed contact 211 or separate, play tongue contact 221 one end to be electrically connected with moving contact mount pad 222, usual fixed contact mount pad 212 and moving contact mount pad 222 are fixedly mounted on the relative both sides of housing respectively, play the below that tongue contact 221 other end extends to fixed contact 211 side, and the end playing tongue contact 221 extension can be provided with contact, be conducive to the laminating of contact part 2.Play tongue contact 221 and be hinged with shaft 11 near moving contact mount pad 222 side, shaft 11 is fixed on shell 1 inside bottom, play tongue contact 221 by offering for the interspersed spliced eye in the past of shaft 11 at sidewall, shaft 11 can make bullet tongue contact 221 rotate in portion 11 around the shaft in door font, shaft 11 is arranged with again the torsion elastic component 111 for playing tongue contact 221 and tilt, the cooperation eventually through governor motion 3 and torsion elastic component 111 controls to play the adhesive of tongue contact 221 and fixed contact 211 or separates.Torsion elastic component 111 can be torsion spring, the toggle of torsion spring can act on respectively and play tongue contact 221 on one end and shaft 11 of contact, bullet tongue contact 221 is tilted under the active force of torsion spring, the fixed contact 211 of fitting and conflict in the end making it extend, realizing circuit loop, and play tongue contact 221 and have enough large contact terminate pressure under the active force of torsion elastic component 111, guarantee the stability of on-state, like this play tongue contact 221 will tightly inconsistent with fixed contact 211, would not occur that playing the shake of tongue contact 221 makes it to be separated with fixed contact 211 multiple-contact the problem causing drawing electric arc like this in the process of protector use, contact will be there is under further would not appearing at the effect of electric arc and melt adhesion, equipment is made to be in the state of overlond running for a long time thus to cause the problem of device damage, also there will not be protector main circuit part to burn because of the high temperature of electric arc simultaneously, and then the problem of initiation fire, control by governor motion 3 motion playing tongue contact 221 when open circuit, bullet tongue contact 221 is made to depart from fixed contact 211, in this structure, opening of contact part 2 realizes regulating apart from the length by controlling to play tongue contact 221, play tongue contact 221 longer, governor motion 3 its ends points displacement when control plays tongue contact 221 is larger, therefore play that this structure of tongue contact 221 can make it with fixed contact 211 to open distance larger, be greater than safety index, when in use there is overvoltage condition, the distance played between tongue contact 221 and fixed contact 211 is larger, so external circuit is applied to the voltage strength played between tongue contact 221 and fixed contact 211 and just can not punctures its air between the two, thus be just not easy to produce electric arc, nature contact part 2 also melting welding or ablation can not make to play tongue contact 221 and melts bonding with fixed contact 211, thus avoid protector lost efficacy or because opening apart from little, the contact terminate pressure blast produced not, the fire even caused because of blast, effectively improve the usage safety performance of protector.
Governor motion 3 can be that the technology such as electromagnet of the prior art realize, but the suction of electromagnet can be unstable when clearance between open contacts is larger, likely the adhesive of bullet tongue contact 221 is not put in place, therefore the application's preferred version is the operate condition realizing playing tongue contact 221 by motor 31 with movable eccentric wheel 32, motor 31 in governor motion 3 realizes in the shell 1 installed by motor 31 by the mounting cup being used for fixing motor 31, and motor 31 is placed in the top playing tongue contact 221, its active force of eccentric wheel 32 that the output of motor 31 is conflicted with bullet tongue contact 221 is enable to control to play the motion of tongue contact 221, simultaneously eccentric wheel 32 between shaft 11 and contact above, be preferably and arrange near shaft 11, even if eccentric wheel 32 rotational angle is less like this, also the end amplitude of fluctuation of bullet tongue contact 221 contact-carrying can be made to increase, what be conducive to increase contact part 2 opens distance.When there is overvoltage, under voltage in supply line, circuit part controls motor 31 and starts, band movable eccentric wheel 32 turns clockwise, and eccentric wheel 32 axial length radius one end bullet tongue contact 221 of conflicting makes it be pressed downwardly, thus plays tongue contact 221 and be separated with fixed contact 211; During reset, circuit part control motor 31 starts, band movable eccentric wheel 32 is rotated counterclockwise, eccentric wheel 32 axle short radius one end is towards torsion elastic component 111, remove the pressing force acting on and play on tongue contact 221, play tongue contact 221 to be upturned under the active force of torsion elastic component 111 and fixed contact 211 of fitting of conflicting, realizing circuit loop simultaneously.This bullet tongue contact 221 coordinates by motor 31 and torsion elastic component 111 the folding realizing contact part 2; because motor 31 drives the active force of eccentric wheel 32 larger also more stable; thus it is also more reliable and stable by the action of eccentric wheel 32 control bullet tongue contact 221; avoid the situation that cannot realize comparatively greatly resetting because opening distance; make the control of bullet tongue contact 221 more reliable and stable, be conducive to protector in working order time safety and stability.
Shell 1 madial wall is fixedly installed the limiting section 12 for preventing fixed contact 211 movement, utilize limiting section 12 to be stabilized in by fixed contact 211 and play directly over tongue contact 221 end, not only can strengthen the installation soundness of fixed contact 211, be convenient to play when tongue contact 221 resets and precisely can fit with fixed contact 211, and play tongue contact 221 to be upturned under the active force of torsion elastic component 111, not easily produce displacement after fitting with fixed contact 211, make the connection of contact part 2 more firm.
Circuit part comprises reset, hookup, control circuit, and over under-voltage protection circuit, control circuit is coupled with reset button and test button, to receive reset signal S2 or stimulus S1, and exporting corresponding reset instruction signal TurnR or TD signal TurnL, reset button and test button can be arranged on the front of shell 1 simultaneously; Reset, hookup are coupled to control circuit, to respond reset instruction signal TurnR or TD signal TurnL; Over under-voltage protection circuit is coupled to external power source, to receive real-time voltage signal, and output overvoltage signal or under-voltage signal U Input, be also coupled to control circuit, so that overvoltage signal or under-voltage signal U Input are sent to control circuit.Control circuit is also coupled with the display DS1 that can show real-time voltage signal.
When pressing test button, control circuit can receive stimulus S1, and output test command signal TurnL is to reset, hookup, and motor 31 is rotated counterclockwise, and contact apparatus is threaded off, when pressing reset button, control circuit will receive reset signal S2, and export reset instruction signal TurnR to resetting, hookup, motor 31 is turned clockwise, contact apparatus closes, can normally work with the contact apparatus that this detects Self-recover overvoltage-undervoltage protector, if there is overvoltage or the situation such as under-voltage in external power source, over under-voltage protection circuit produces overvoltage signal or under-voltage signal U Input and is sent to control circuit, control circuit controls motor 31 and turns clockwise, contact apparatus is threaded off, the object of overvoltage/undervoltage protection is reached with this, in addition, display DS1 is coupled to control circuit to show real-time voltage.
In more detail, press test button, control circuit receives stimulus S1, and output test command signal TurnL is to reset, hookup, makes the 5th NPN triode Q5 and the 7th NPN triode Q7 conducting, then the first contact group M1 conducting, motor 31 is rotated counterclockwise, and be with movable eccentric wheel 32 to rotate, the jut of eccentric wheel 32 contacts at and plays tongue contact 221 and be with tongue contact 221 of moving to rotate, and makes bullet tongue contact 221 and fixed contact 211 disjunction; Press reset button, control circuit receives reset signal S2, and export reset instruction signal TurnR to reset, hookup, make the 4th NPN triode Q4 and the 6th NPN triode Q6 conducting, then the second contact group M2 conducting, makes motor 31 turn clockwise, and is with movable eccentric wheel 32 to rotate, the jut of eccentric wheel 32 contacts at and plays tongue contact 221 and be with tongue contact 221 of moving to rotate, and bullet tongue contact 221 and fixed contact 211 are resetted.Over under-voltage protection circuit is coupled to zero line and the live wire of external power source; receive alternating voltage and carry out rectification by the first diode D1; and first electrochemical capacitor E1 carry out filtering; voltage is compared by comparator U1A; if there is overvoltage or under-voltage situation; comparator U1A output overvoltage signal or under-voltage signal U Input are to control circuit, and control circuit controls motor 31 and turns clockwise, and contact apparatus is threaded off.Wherein, display DS1 is light-emitting diode display, and control circuit comprises programmable chip (such as ATT7022 series, TSB41AB2 family chip), by by burned for program programmable chip; control reset, hookup, and over under-voltage protection circuit realizes function described above.In addition, the components and parts do not identified in Fig. 4 to Fig. 6 are considered as those skilled in the art's common practise.
Below be only the preferred embodiment of the present invention, protection scope of the present invention be not only confined to above-described embodiment, all technical schemes belonged under thinking of the present invention all belong to protection scope of the present invention.It should be pointed out that for those skilled in the art, some improvements and modifications without departing from the principles of the present invention, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (5)
1. a Self-recover overvoltage-undervoltage protector, include shell, circuit part and contact apparatus, described contact apparatus includes contact part and for the governor motion controlling contact part adhesive or separate, described contact part includes stationary contact head and moving contact portion, it is characterized in that: described stationary contact head includes fixed contact and fixed contact mount pad, described fixed contact and the electrical connection of fixed contact mount pad, the bullet tongue contact that described moving contact portion includes moving contact mount pad and can fit with fixed contact or separate, described bullet tongue contact one end is electrically connected with moving contact mount pad, the described bullet tongue contact other end extends to fixed contact side, described governor motion is for controlling to play the adhesive of tongue contact and fixed contact or separating, described bullet tongue contact is hinged with shaft near moving contact mount pad side, described shaft is fixed on shell inside bottom, described shaft is arranged with for the torsion elastic component by playing the tilting of tongue contact, the other end of described bullet tongue contact extends to below fixed contact.
2. Self-recover overvoltage-undervoltage protector according to claim 1, is characterized in that: described governor motion includes motor, and the output of described motor is provided with and the eccentric wheel playing tongue contact and conflict.
3. Self-recover overvoltage-undervoltage protector according to claim 1 and 2, is characterized in that: be provided with the limiting section for preventing fixed contact movement inside described shell.
4. Self-recover overvoltage-undervoltage protector according to claim 1, is characterized in that: described circuit part comprises:
Control circuit: be coupled with reset button and test button, to receive reset signal or stimulus, and exports corresponding reset instruction signal or TD signal;
Reset, hookup: be coupled to control circuit, to receive reset instruction signal or TD signal, and export corresponding homing action signal or test actuating signal, be also coupled to motor, rotate to carry out drive motors according to homing action signal or test actuating signal;
Over under-voltage protection circuit: be coupled to external power source, to receive real-time voltage signal, and output overvoltage signal or under-voltage signal, be also coupled to control circuit, so that overvoltage signal or under-voltage signal are sent to control circuit;
Wherein, when reset, hookup output test actuating signal, motor turns clockwise, contact apparatus is threaded off, and when reset, hookup export homing action signal, motor is rotated counterclockwise, contact apparatus closes, when control circuit receives overvoltage signal or under-voltage signal, motor turns clockwise, and contact apparatus is threaded off.
5. Self-recover overvoltage-undervoltage protector according to claim 4, is characterized in that: described control circuit is also coupled with the display that can show real-time voltage signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510006872.3A CN104505806B (en) | 2015-01-05 | 2015-01-05 | Self-recover overvoltage-undervoltage protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510006872.3A CN104505806B (en) | 2015-01-05 | 2015-01-05 | Self-recover overvoltage-undervoltage protector |
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| Publication Number | Publication Date |
|---|---|
| CN104505806A true CN104505806A (en) | 2015-04-08 |
| CN104505806B CN104505806B (en) | 2017-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510006872.3A Active CN104505806B (en) | 2015-01-05 | 2015-01-05 | Self-recover overvoltage-undervoltage protector |
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| Country | Link |
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| CN (1) | CN104505806B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1271592A1 (en) * | 2001-06-29 | 2003-01-02 | Denso Corporation | Deceleration impact detector for use in automotive vehicle |
| CN201820714U (en) * | 2010-09-01 | 2011-05-04 | 刘爱民 | Motor-type high power relay |
| CN202196721U (en) * | 2011-09-13 | 2012-04-18 | 浙江正泰电器股份有限公司 | Operation mechanism of modulization breaker |
| CN202917961U (en) * | 2012-11-23 | 2013-05-01 | 中国轻工业武汉设计工程有限责任公司 | Self-recovery type over-voltage and under-voltage protection circuit breaker |
| CN203774749U (en) * | 2013-12-31 | 2014-08-13 | 安徽鑫龙电器股份有限公司 | Digital display adjustable self-reset type overvoltage and undervoltage protector |
-
2015
- 2015-01-05 CN CN201510006872.3A patent/CN104505806B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1271592A1 (en) * | 2001-06-29 | 2003-01-02 | Denso Corporation | Deceleration impact detector for use in automotive vehicle |
| CN201820714U (en) * | 2010-09-01 | 2011-05-04 | 刘爱民 | Motor-type high power relay |
| CN202196721U (en) * | 2011-09-13 | 2012-04-18 | 浙江正泰电器股份有限公司 | Operation mechanism of modulization breaker |
| CN202917961U (en) * | 2012-11-23 | 2013-05-01 | 中国轻工业武汉设计工程有限责任公司 | Self-recovery type over-voltage and under-voltage protection circuit breaker |
| CN203774749U (en) * | 2013-12-31 | 2014-08-13 | 安徽鑫龙电器股份有限公司 | Digital display adjustable self-reset type overvoltage and undervoltage protector |
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| Publication number | Publication date |
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| CN104505806B (en) | 2017-06-30 |
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Effective date of registration: 20200514 Address after: 325000 No. 30 Tengfei Road, Liushi Town, Wenzhou City, Zhejiang, Yueqing Patentee after: Zhejiang Tianwei Electric Technology Co., Ltd Address before: 325604 No. 30 Tengfei Road, Liushi Town, Wenzhou City, Zhejiang, Yueqing Patentee before: ZHEJIANG AUDK ELECTRICAL APPLIANCE Co.,Ltd. |
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