CN2432713Y - Non-fuse safety device - Google Patents
Non-fuse safety device Download PDFInfo
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- CN2432713Y CN2432713Y CN 00226371 CN00226371U CN2432713Y CN 2432713 Y CN2432713 Y CN 2432713Y CN 00226371 CN00226371 CN 00226371 CN 00226371 U CN00226371 U CN 00226371U CN 2432713 Y CN2432713 Y CN 2432713Y
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- 230000000087 stabilizing effect Effects 0.000 claims description 15
- 238000005070 sampling Methods 0.000 claims description 10
- 239000003381 stabilizer Substances 0.000 claims description 9
- 238000001514 detection method Methods 0.000 abstract description 3
- 239000003990 capacitor Substances 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000001934 delay Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000005611 electricity Effects 0.000 description 5
- 230000001052 transient effect Effects 0.000 description 5
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 4
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 239000006004 Quartz sand Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- -1 ferrous metals Chemical class 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The utility model relates to a safety device, which is suitable for the over-current protection of a high voltage and high power electric apparatus. The utility model is characterized in that a current sensor, a detection circuit and a power electronic switching circuit are connected in series between high voltage power supply and an electric apparatus; the current sensor and the detection circuit are connected with an over-current setting device and a comparison circuit; the output ends of the over-current setting device and the comparison circuit are simultaneously connected with a momentary over-current action circuit and a long-time over-current action circuit; the momentary over-current action circuit is connected with the control end of the power electronic switching circuit; the output end of the long-time over-current action circuit is connected with the control end of the power electronic switching circuit. The shutdown of unnecessary over-current can be reduced and the use-cost is low.
Description
The utility model relates to a kind of safeties of electric equipment, particularly is suitable for high voltage, powerful electric equipment overvoltage, the safeties of overcurrent protection.
At present, use the safeties on electric equipment to mainly contain following several:
1, general purpose fuse insurance
2, fast acting fuse
3, thermistor current limliting insurance
The general purpose fuse safeties are suitable for low-voltage, the electric equipment of small-power, and it uses simple, and price is low, fuses during insurance work.Shortcoming: consume the non-ferrous metal contaminated environment; to the effect of momentary excess current unprotect; the Mechanical Contact of fuse is easy non-protective fusing when bad; price is not low when often being operated in blown state; it is not firm to insure; whether the phenomenon that or not during this fusing happen occasionally, and the relay protection device of electric equipment is had high requirements.
Fast acting fuse is suitable for the high-power electric equipment, and its advantage is: overcurrent all has safety effect during to instantaneous and length, and price is lower under situation about not fusing.Some fast acting fuse also is equipped with signal contact outside safety box.Shortcoming: instantaneous overcurrent under need not the shutdown situation causes to shut down and causes production loss, consumes non-ferrous metal and quartz sand; Price height when often being operated in the momentary excess current circuit; Relay protection device to electric equipment has higher requirements.
The insurance of temperature-sensitive current limliting is suitable for circuit and micropower equipment; its advantage is: simply do not have fuse; device overcurrent in the electric wiring there is protective effect; variations in temperature resistance variations restriction electric current increases; shortcoming: no on-off action; can not excise power supply, influenced by the resistance change scope, use occasion is limited.
For 1,2 above-mentioned a large amount of two kinds of insurances using; its operation principle is to utilize the heat that overcurrent produces in the electric equipment course of work; fuse when reaching the fusing point of its operation material-fuse, make power supply circuits and electric equipment open circuit, to reach the purpose of protection electric equipment.Above-mentioned 3 described thermistor current limliting insurances, its operation principle is to utilize the heat that overcurrent produces in the electric equipment course of work, and its resistance value is increased, and protects electric equipment with the method that overcurrent is limited within the specific limits, but can not cut off the electricity supply.
Though above-mentioned 1,2,3 safeties are easy to use,, when using on the powerful electric equipment, there is certain limitation at high voltage.High voltage, powerful electric equipment play crucial effects generally speaking in production link, the startup of this electric equipment, stop and downtime length, directly influence other electric equipment and productivity effect.In high voltage, the powerful electric equipment loop, the overcurrent of generation has two kinds: overcurrent and momentary excess current when long, overcurrent means that equipment exists and damages fault when long, must be with equipment off-the-line and cutting off the electricity supply from the loop.The reason that momentary excess current produces is more, most of overcurrent all is instantaneous in high voltage, the powerful electric equipment loop, this momentary excess current ordinary circumstance can not damaged electric equipment, not necessarily will be with the equipment off-the-line or the production loss that causes out of service of cutting off the electricity supply from the loop yet.Above-mentioned 1,2,3 safeties all can not play such effect: when overcurrent was promptly arranged in high voltage, the powerful electric equipment loop when long, protection was cut off the electricity supply when growing; When momentary excess current is arranged, carry out instantaneous protection and cut off the electricity supply, automatic recovery of power supply after momentary excess current disappears is avoided unnecessary shutdown and production loss.Above-mentioned 1,2 safeties also will consume a large amount of non-ferrous metals, cause waste and pollution.
The purpose of this utility model is a kind of like this safeties of design: it is a kind of safeties that are applied in high voltage, the powerful electric equipment loop, when overcurrent is arranged in high voltage, the powerful electric equipment loop when long, safeties enter blocking state fast, make the blocking-up of power supply and electric equipment, protection power supply and electric equipment; When in high voltage, the powerful electric equipment loop momentary excess current being arranged, safeties enter instantaneous blocking state fast, make the instantaneous blocking-up of power supply and electric equipment, protection power supply and electric equipment, after the momentary excess current in high voltage, the powerful electric equipment loop disappears, the fast quick-recovery opening state of safeties makes power supply and electric equipment recover to be connected, and avoids unnecessary shutdown and production loss; Its volume simple in structure is little, and use cost is low.
The technical solution of the utility model;
A kind of no fuse safeties is characterized in that: it is by current sensor and testing circuit, overcurrent setting and comparison circuit, momentary excess current actuating circuit, overcurrent actuating circuit, power electronic switching and switching circuit are electrically connected to form when long; Current sensor and testing circuit, power electronic switching and switching circuit are connected between high voltage source and the electric equipment, current sensor and testing circuit set with overcurrent and comparison circuit is connected, overcurrent actuating circuit when the output of overcurrent setting and comparison circuit connects momentary excess current actuating circuit and length simultaneously, the momentary excess current actuating circuit is connected with the control end of power electronic switching and switching circuit; The output of overcurrent actuating circuit is connected with the control end of ON-OFF control circuit when long.
Above-mentioned said current sensor and testing circuit are made up of a current transformer and rectification circuit; Output-parallel one resistance of current transformer connects the ac input end of rectification circuit simultaneously, and the output of rectification circuit is taken over current settings and comparison circuit.
Above-mentioned said rectification circuit can be an also half-wave rectifying circuit of full-wave rectifying circuit.
Above-mentioned said overcurrent setting and comparison circuit are by a voltage comparator, and a reference voltage generating circuit and a pressure sampling circuit are formed; Reference voltage generating circuit also connects above-mentioned said rectification circuit direct current two ends, the positive input terminal of the output termination voltage comparator of reference voltage generating circuit; Pressure sampling circuit also be connected on above-mentioned said rectification circuit direct current two ends, the negative input end of the output termination voltage comparator of pressure sampling circuit.
Above-mentioned said reference voltage generating circuit is made of a resistance and a voltage-stabiliser tube, is connected in parallel on above-mentioned said rectification circuit dc output end after resistance and the voltage-stabiliser tube serial connection, and the tie point of resistance and voltage-stabiliser tube connects the positive input terminal of voltage comparator.
Above-mentioned said pressure sampling circuit is by two resistance serial connection and above-mentioned said rectification circuit dc output end, and two resistance contacts connect the negative input end of voltage comparator T.
Above-mentioned said momentary excess current actuating circuit comprises that a photoelectric coupled device, a power electronic power switch open circuit, the input of photoelectric coupled device connects the output of above-mentioned said voltage comparator, the output termination power electronic switching circuit trigger end of photoelectric coupled device connects the power electronic power switch simultaneously and opens circuit.
Above-mentioned said momentary excess current actuating circuit also can be made up of a voltage stabilizing circuit, and the negative terminal of voltage stabilizing circuit connects the input of photoelectric coupled device, is connected to electric capacity between voltage-stabilizing device and current-limiting resistance.
It is to be made of resistance and diode series connection that power electronic power switch in the above-mentioned said momentary excess current actuating circuit is opened circuit, the input of another termination power electronic switching circuit of resistance, another termination power electronic switching circuit trigger end of diode.
Above-mentioned said when long the overcurrent actuating circuit comprise that an integrator delay-time circuit, a photoelectric coupled device and relay form, the output of above-mentioned said voltage comparator is connected with the input of integrator delay-time circuit, the output termination photoelectrical coupler input of integrator delay-time circuit, photoelectric coupler output end is succeeded appliance switch one end; The other end of relay can be connected in series indicator light, connects the input of electronic power switch.
Above-mentioned said when long the overcurrent actuating circuit can form by a voltage stabilizing circuit, the negative terminal of voltage stabilizing circuit connects the input of photran device, is connected to electric capacity between voltage-stabilizing device and current-limiting resistance.
Above-mentioned said integrator delay-time circuit is made of diode, resistance, electric capacity, the input of integrating circuit is connected with the output of above-mentioned said voltage comparator, the output of integrating circuit drives photoelectrical coupler, an end of the output relay termination of photoelectrical coupler by resistance and triode.
Power switch component in the power electronic power switching circuit, be can utilize the instantaneous overcurrent actuating circuit and the control signal of overcurrent actuating circuit is opened and closed when long power electronic device, it is opened and closed condition satisfies electric equipment and starts the requirement that operation and off-the-line stop.
Current detecting, comparison circuit are made up of current sensor and integrated circuit comparator circuit, the over-current signal of setting on the signal of current sensor senses and the comparator is compared, detection signal is during greater than setting signal, comparison circuit output control signal, overcurrent actuating circuit during with startup instantaneous overcurrent actuating circuit and length.
The instantaneous overcurrent actuating circuit is made up of photoelectrical coupler, during the action of instantaneous overcurrent actuating circuit, the power switch component in the power electronic power switching circuit is changed into closed condition by opening state.
The overcurrent actuating circuit is made up of delay circuit, photoelectrical coupler, relay when long, when overcurrent moves circuit operation when long, the power switch component in the power electronic power switching circuit is changed into closed condition by opening state; The overcurrent indicator light is bright, the over-current signal output contact by often open transfer to normally closed.
Safeties are designed to modular structure, and the electronic circuit dispense with outer connecting power that it includes gets final product work, can peg graft.
Characteristics of the present utility model:
1, this no fuse safeties; it utilizes current sense circuit, current detecting, the electrical connection of the power switch component in the electronic power switching circuit is opened and closed to overcurrent actuating circuit, instantaneous overcurrent actuating circuit when comparison circuit control started length; when long and momentary excess current all shield and the instantaneous recovery function arranged; can reduce momentary excess current and shut down, reduce production loss.Safeties have the modularization feature of long life, and overcurrent indication and the output of overcurrent signal contact are arranged, and make things convenient for equipment operation.Economical with materials does not consume non-ferrous metal and avoids polluting.
2, this safeties are designed to the plug connector of modular structure, and the electronic circuit dispense with outer connecting power that it includes is convenient to use method equally with above-mentioned 1,2 safeties, the replacement of can directly pegging graft; And warning indication and overcurrent signal output contact with electric loop overcurrent when long, with convenient operation and interlock protective relaying device.
3, safeties described in the utility model have soft start function, avoid the impact of starting current when electric equipment is started, and protect electric equipment effectively.
4, power electronic device has high-speed performance, instantaneous overcurrent is effectively protected be better than being convenient to use method equally with other safeties after the fast acting fuse modularization.
5, because this device possesses electric current relaying protection function, so the electric equipment protective relaying device is required to reduce, whole use cost is low.
Below in conjunction with embodiment of the present utility model and accompanying drawing operation principle of the present utility model is further described:
Accompanying drawing 1 is a logic diagram of the present utility model.
Accompanying drawing 2 is circuit diagrams of the utility model embodiment 1.
Accompanying drawing 3 is circuit diagrams of the utility model embodiment 2.
In the accompanying drawing 1, current sensor and testing circuit 1, power electronic switching element and switching circuit 5 are connected between power supply and the electric equipment 6, the voltage of current sensor and testing circuit 1 mutual inductance sets with overcurrent and comparison circuit is connected, overcurrent actuating circuit 4 when the output of overcurrent setting and comparison circuit 2 connects momentary excess current actuating circuit 3 and length simultaneously, momentary excess current actuating circuit 3 is connected with the control end of electronic power switch element and switching circuit 5; The output of overcurrent actuating circuit 4 is connected with the control end of electronic power switch element and switching circuit 5 when long.
In accompanying drawing 2, above-mentioned said current sensor and testing circuit 1 are made up of a current transformer CT and rectifier circuit ZL capacitor C 1; The output-parallel current/voltage transfer resistance R of current transformer connects the ac input end of rectification circuit simultaneously, and the output of rectification circuit is taken over current settings and comparison circuit.
Above-mentioned said overcurrent setting and comparison circuit 2 are by a voltage comparator T, and a reference voltage generating circuit and a pressure sampling circuit are formed; Reference voltage generating circuit is made of a resistance R 3 and a voltage-stabiliser tube D1, is connected in parallel on above-mentioned said rectification circuit dc output end after resistance R 3 and the voltage-stabiliser tube D1 serial connection, and the tie point of resistance R 3 and voltage-stabiliser tube D1 connects the positive input terminal of voltage comparator T; Pressure sampling circuit is connected with above-mentioned said rectification circuit dc output end with the R2 serial connection by resistance R 1, and the contact of resistance R 1 and R2 connects the negative input end of voltage comparator T.
Above-mentioned said momentary excess current actuating circuit 3 comprises that a photoelectric coupled device G2, a power electronic power switch open circuit, the output of above-mentioned said voltage comparator T joins by the input of a resistance R 5 with photoelectric coupled device G2, simultaneously at the input of photoelectric coupled device G2 and be connected to capacitor C 2, the trigger end of the output termination power electronic switching circuit of photoelectric coupled device G2 connects the power electronic power switch simultaneously and opens circuit output end; It is to be made of resistance R 8 and diode D4 and capacitor C 4 series connection that the power electronic power switch is opened circuit.
Above-mentioned said when long overcurrent actuating circuit 4 comprise that an integrating circuit, a photoelectric coupled device G3, a relay J 1 form, integrating circuit wherein is made of diode D3, resistance R 6, capacitor C 3, the input of integrating circuit is connected with the output of above-mentioned said voltage comparator T, the output of integrating circuit drives photoelectrical coupler G3 resistance R 9 by a resistance R 7 and triode G1, output relay termination J1 one end of photoelectrical coupler G3, another termination indicator light of relay ZD.
Relay J 1 in the utility model has three often to open output J1-1, J1-2, J1-3, wherein, J1-1 is attempted by the output of photoelectrical coupler G2, and J1-2 one end is connected in series relay J 1 and indicator light 6, is connected in parallel on the two ends of power electronic power switch element 5 simultaneously; J1-3 does over-current signal output.
The circuit basically identical of accompanying drawing 3 and accompanying drawing 2, wherein rectification circuit constitutes half-wave rectifying circuit by diode D1, capacitor C 1, RT is that overcurrent is set the adjustment potentiometer].
The momentary excess current actuating circuit constitutes voltage stabilizing circuit by a resistance R 1, voltage stabilizing didoe D2, capacitor C 2 in accompanying drawing 3, and voltage stabilizing didoe D2 negative terminal connects photoelectrical coupler G1 input, is connected to capacitor C 2 between voltage stabilizing didoe D2 and current-limiting resistance R1; The overcurrent actuating circuit constitutes voltage stabilizing circuit by a resistance R 2, voltage stabilizing didoe D3, capacitor C 3 when long, and diode D3 negative terminal connects photran device G2 input, is connected to capacitor C 3 between voltage stabilizing didoe D3 and current-limiting resistance R2.
Photoelectrical coupler G1, photran device G2 output the open-minded of the trigger end power controlling power electronic element G3 that meets power power electronic element G3 that be connected in the accompanying drawing 3.
Operation principle is as follows:
AC power arrives power power electronic element and switching circuit 5 via current sense and testing circuit 1, and power power electronic element and switching circuit 5 power on open-minded, and electric equipment loop load circuit 6 gets electric work; Simultaneously, the current signal that current sense and testing circuit 1 detect is delivered to and is relatively set testing circuit 2, when current signal does not arrive set point, and the output of comparator low level, overcurrent actuating circuit 4 is failure to actuate when momentary excess current actuating circuit 3 and length; When current signal reaches set point, comparator output high-level control signal, the action of momentary excess current actuating circuit 3 transient delays, overcurrent delay circuit 4 charging time-delays when long, after the action of momentary excess current actuating circuit 3 transient delays, power electronic power switch element and switching circuit 5 are closed, no current flows through in the electric equipment loop load circuit 6, simultaneously, current sense and testing circuit 1 also no current flow through, and relatively set testing circuit 2 working powers and disappear, and the action of momentary excess current actuating circuit 3 transient delays is removed, power power electronic element and switching circuit 5 power on open-minded, rework.
When overcurrent produces when long, the action of momentary excess current actuating circuit 3 transient delays will repeat for several times, make that the 4 charging time-delays of overcurrent delay circuit reach operating value when long, overcurrent actuating circuit 4 actions when long make the closed and self-locking of relay J 1, close power electronic power switch element 5, bright, the output overcurrent signal contact J1-3 output closure signal of over current lamp ZD.
Safeties described in the utility model, the delay time of overcurrent delay circuit 4 designs when appropriate when long, and the big electric current when electric equipment loop load circuit 6 starts will be limited by action of momentary excess current actuating circuit 3 transient delays and repetitive operation thereof, therefore, has soft start function.
The foregoing description of safeties described in the utility model is the application in alternating current circuit, and the electronic power switch element is two-way, when in DC circuit, using, and the unidirectional power electronic element that use can be turn-offed.
Claims (12)
1, a kind of no fuse safeties is characterized in that: it is by current sensor and testing circuit, overcurrent setting and comparison circuit, momentary excess current actuating circuit, overcurrent actuating circuit, power electronic switching circuit, ON-OFF control circuit are electrically connected to form when long; Current sensor and testing circuit, power electronic switching circuit are connected between high voltage source and the electric equipment, current sensor and testing circuit set with overcurrent and comparison circuit is connected, overcurrent actuating circuit when the output of overcurrent setting and comparison circuit connects momentary excess current actuating circuit and length simultaneously, the momentary excess current actuating circuit is connected with the control end of power electronic switching circuit; The output of overcurrent actuating circuit is connected with the control end of ON-OFF control circuit when long.
2, a kind of no fuse safeties according to claim 1, it is characterized in that: above-mentioned said current sensor and testing circuit are made up of a current transformer and rectification circuit; Output-parallel one resistance of current transformer connects the ac input end of rectification circuit simultaneously, and the output of rectification circuit is taken over current settings and comparison circuit.
3, a kind of no fuse safeties according to claim 1 is characterized in that: above-mentioned said rectification circuit can be an also half-wave rectifying circuit of full-wave rectifying circuit.
4, a kind of no fuse safeties according to claim 1 is characterized in that: above-mentioned said overcurrent setting and comparison circuit are by a voltage comparator, and a reference voltage generating circuit and a pressure sampling circuit are formed; Reference voltage generating circuit also connects above-mentioned said rectification circuit direct current two ends, the positive input terminal of the output termination voltage comparator of reference voltage generating circuit; Pressure sampling circuit also be connected on above-mentioned said rectification circuit direct current two ends, the negative input end of the output termination voltage comparator of pressure sampling circuit.
5, a kind of no fuse safeties according to claim 1, it is characterized in that: above-mentioned said reference voltage generating circuit is made of a resistance and a voltage-stabiliser tube, be connected in parallel on above-mentioned said rectification circuit dc output end after resistance and the voltage-stabiliser tube serial connection, the tie point of resistance and voltage-stabiliser tube connects the positive input terminal of voltage comparator T.
6, a kind of no fuse safeties according to claim 1 is characterized in that: above-mentioned said pressure sampling circuit is by two resistance serial connections and above-mentioned said rectification circuit dc output end, and the contact of two resistance connects the negative input end of voltage comparator.
7, a kind of no fuse safeties according to claim 1, it is characterized in that: above-mentioned said momentary excess current actuating circuit comprises that a photoelectric coupled device, a power electronic power switch open circuit, the input of photoelectric coupled device connects the output of above-mentioned said voltage comparator, the output termination power electronic switching circuit trigger end of photoelectric coupled device connects the power electronic power switch simultaneously and opens circuit.
8, a kind of no fuse safeties according to claim 1, it is characterized in that: above-mentioned said momentary excess current actuating circuit also can be made up of a voltage stabilizing circuit, the negative terminal of voltage stabilizing circuit connects the input of photoelectric coupled device, is connected to electric capacity between voltage-stabilizing device and current-limiting resistance.
9, a kind of no fuse safeties according to claim 1, it is characterized in that: it is to be made of resistance and diode series connection that the power electronic power switch in the above-mentioned said momentary excess current actuating circuit is opened circuit, the input of another termination power electronic switching circuit of resistance, another termination power electronic switching circuit trigger end of diode.
10, a kind of no fuse safeties according to claim 1, it is characterized in that: above-mentioned said when long the overcurrent actuating circuit comprise that an integrator delay-time circuit, a photoelectric coupled device and relay form, the output of above-mentioned said voltage comparator is connected with the input of integrator delay-time circuit, the output termination photoelectrical coupler input of integrator delay-time circuit, photoelectric coupler output end is succeeded appliance switch one end; The other end of relay can be connected in series indicator light, connects the input of electronic power switch.
11, a kind of no fuse safeties according to claim 1, it is characterized in that: above-mentioned said when long the overcurrent actuating circuit can form by a voltage stabilizing circuit, the negative terminal of voltage stabilizing circuit connects the input of photran device, is connected to electric capacity between voltage-stabilizing device and current-limiting resistance.
12, a kind of no fuse safeties according to claim 1, it is characterized in that: above-mentioned said integrator delay-time circuit is made of diode, resistance, electric capacity, the input of integrating circuit is connected with the output of above-mentioned said voltage comparator, the output of integrating circuit drives photoelectrical coupler, an end of the output relay termination of photoelectrical coupler by resistance and triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00226371 CN2432713Y (en) | 2000-05-01 | 2000-05-01 | Non-fuse safety device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00226371 CN2432713Y (en) | 2000-05-01 | 2000-05-01 | Non-fuse safety device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2432713Y true CN2432713Y (en) | 2001-05-30 |
Family
ID=33590233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00226371 Expired - Fee Related CN2432713Y (en) | 2000-05-01 | 2000-05-01 | Non-fuse safety device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2432713Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100341219C (en) * | 2001-09-28 | 2007-10-03 | 易通公司 | Method and device for detecting and inhibiting parallel arc fault |
| CN103311881A (en) * | 2013-06-21 | 2013-09-18 | 无锡商业职业技术学院 | Over-current protection device and method |
| CN104466892A (en) * | 2014-12-25 | 2015-03-25 | 丁柳信 | Laboratory power supply protection device |
| CN105098724A (en) * | 2015-07-11 | 2015-11-25 | 合肥正浩机械科技有限公司 | Electromechanical hybrid direct-current circuit breaker |
| CN105098699A (en) * | 2015-07-11 | 2015-11-25 | 合肥正浩机械科技有限公司 | Mechanical-electronic hybrid circuit breaker |
-
2000
- 2000-05-01 CN CN 00226371 patent/CN2432713Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100341219C (en) * | 2001-09-28 | 2007-10-03 | 易通公司 | Method and device for detecting and inhibiting parallel arc fault |
| CN103311881A (en) * | 2013-06-21 | 2013-09-18 | 无锡商业职业技术学院 | Over-current protection device and method |
| CN104466892A (en) * | 2014-12-25 | 2015-03-25 | 丁柳信 | Laboratory power supply protection device |
| CN105098724A (en) * | 2015-07-11 | 2015-11-25 | 合肥正浩机械科技有限公司 | Electromechanical hybrid direct-current circuit breaker |
| CN105098699A (en) * | 2015-07-11 | 2015-11-25 | 合肥正浩机械科技有限公司 | Mechanical-electronic hybrid circuit breaker |
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| 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 |