CN204167871U - A kind of Aftercurrent protection circuit breaker - Google Patents
A kind of Aftercurrent protection circuit breaker Download PDFInfo
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- CN204167871U CN204167871U CN201420627605.9U CN201420627605U CN204167871U CN 204167871 U CN204167871 U CN 204167871U CN 201420627605 U CN201420627605 U CN 201420627605U CN 204167871 U CN204167871 U CN 204167871U
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Abstract
A kind of Aftercurrent protection circuit breaker, belongs to electric protective equipment field.Comprise detecting unit, amplifying circuit, detection of electrical leakage comparison circuit, pulse detection comparison circuit, OR circuit, delay circuit, electronic switching circuit and relay, it is characterized in that: described relay is magnetic latching relay, the live wire of the contact series incoming transport electricity of magnetic latching relay, ordinary electromagnetic formula relay of the prior art is replaced by arranging magnetic latching relay in zero line, magnetic latching relay automatically can keep the state after its action after each action, therefore electronic switching circuit is without the need to continuing to provide voltage to magnetic latching relay, avoid the electric energy loss that continuing powers on causes, avoid the appearance of components and parts fever phenomenon simultaneously, eliminate the potential safety hazard occurred because of heating, slowed down the aging of components and parts simultaneously to a certain extent.
Description
Technical field
A kind of Aftercurrent protection circuit breaker, belongs to electric protective equipment field.
Background technology
Aftercurrent protection circuit breaker; for connecting in normal working conditions; carrying and breaking current and under prescribed conditions; mechanical switch electrical equipment contact being disconnected when residual current reaches a setting is a kind of electric equipment effectively preventing person electric shock, electrical fire and electric equipment from damaging.As shown in Figure 4, in the Aftercurrent protection circuit breaker of prior art, detecting unit is used for the residual current signal in testing circuit, and the residual current signal detected is sent into the amplification carrying out signal in discharge circuit, signal after amplification is sent in detection of electrical leakage comparison circuit and pulse detection comparison circuit by amplifying circuit respectively, when the signal magnitude that detection of electrical leakage comparison circuit or pulse detection comparison circuit detect is greater than presetting threshold value, corresponding voltage comparator circuit exports high level signal, when detection of electrical leakage comparison circuit and/or pulse detection comparison circuit export high level signal, OR circuit exports high level signal, this high level signal sends into electronic switching circuit, voltage signal is loaded on the coil of relay by electronic switching circuit, the actuating of relay, the alternating current of access is disconnected, play a protective role, simultaneously voltage signal is sent into delay circuit by electronic switching circuit, and after reaching presetting time, delay circuit action, cuts off the voltage being carried in relay coil two ends by electronic switching circuit, relay resets, and is connected by alternating current.
In the prior art; relay for cutting off, connecting alternating current generally adopts conventional electromagnetic relay; at Aftercurrent protection circuit breaker; electromagnetic relay is adopted to have following drawback: 1, after electronic switching circuit drives the actuating of relay; the on-load voltage that must continue at the two ends of relay coil, therefore can consume more electric energy.2, owing to needing to continue on-load voltage at the two ends of relay coil, therefore can produce larger heat, when particularly using in the environment that temperature is higher in use, there is certain potential safety hazard, easily accelerate the aging of components and parts simultaneously; 3, relay is when action, along with the adhesive of getting an electric shock and disconnection, can have certain noise.
Summary of the invention
The technical problems to be solved in the utility model is: overcome the deficiencies in the prior art, provides a kind of after the actuating of relay, getting final product latching relay state, decreasing the Aftercurrent protection circuit breaker that energy consumption reduces potential safety hazard simultaneously without the need to continuing to power on.
The utility model solves the technical scheme that its technical problem adopts: this Aftercurrent protection circuit breaker, comprise detecting unit, amplifying circuit, detection of electrical leakage comparison circuit, pulse detection comparison circuit, OR circuit, delay circuit, electronic switching circuit and relay, the input of detected circuit access detecting unit, the input of the output access amplifying circuit of detecting unit, the output of amplifying circuit accesses the input of detection of electrical leakage comparison circuit and pulse detection comparison circuit respectively, detection of electrical leakage comparison circuit, the output of pulse detection comparison circuit accesses the input of OR circuit respectively, the output of OR circuit connects electronic switching circuit, the output of electronic switching circuit is connected with the signal input part of relay, interconnect with delay circuit simultaneously, it is characterized in that: described relay is magnetic latching relay, the live wire of the contact series incoming transport electricity of magnetic latching relay, in zero line.
Preferably, described detection of electrical leakage comparison circuit is the voltage comparator circuit be made up of integrated operational amplifier U2, its in-phase input end accesses the reference voltage obtained by resistance R4 ~ R5 dividing potential drop, and the output of above-mentioned amplifying circuit is connected to the inverting input of integrated operational amplifier U2.
Preferably, described pulse detection comparison circuit is the voltage comparator circuit be made up of integrated operational amplifier U3, its in-phase input end accesses the reference voltage obtained by resistance R7 ~ R8 dividing potential drop, and the output of above-mentioned amplifying circuit is connected to the inverting input of integrated operational amplifier U3 by electric capacity C3.
Preferably, described electronic switching circuit comprises triode Q1 ~ Q2, relay K A1, resistance R10, resistance R12, diode D4 and electric capacity C4, the output of described OR circuit to be connected after a current-limiting resistance negative pole of shunt capacitance C4 simultaneously, the base stage of triode Q1 and one end of resistance R12, the other end of resistance R12 and the grounded emitter of triode Q1; Power Vcc is parallel resistance R9 ~ R10, one end of relay K A1 coil and the normally opened contact of relay K A1 simultaneously; The other end positive pole of shunt capacitance C4 and the anode of diode D4 simultaneously of resistance R9, the negative electrode other end of relay K A1 in parallel and the collector electrode of triode Q2 simultaneously of diode D4, the other end collector electrode of triode Q1 in parallel, the base stage of triode Q2 simultaneously of resistance R10, the grounded emitter of triode Q2, the normally-closed contact ground connection of relay K A1; Ground connection after the not moved end series capacitance C5 of relay K A1, the coil of relay K A2.
Preferably, described alternating current is the two-phase alternating current comprising live wire L and zero line N.
Preferably, described alternating current be comprise A phase, B phase, C phase three-phase firewire and zero point N three-phase four-wire system alternating current.
Compared with prior art, the beneficial effect that the utility model has is:
1, ordinary electromagnetic formula relay of the prior art is replaced by arranging magnetic latching relay, magnetic latching relay automatically can keep the state after its action after each action, therefore electronic switching circuit is without the need to continuing to provide voltage to magnetic latching relay, avoids the electric energy loss that continuing powers on causes.
2, due to without the need to continuing to provide voltage to magnetic latching relay, avoiding components and parts heating simultaneously, avoiding the potential safety hazard occurred because of heating, slowed down the aging of components and parts simultaneously to a certain extent.
3, because magnetic keeps being not traditional electromagnetic type relay, therefore when action, sound is less, avoids the appearance of noise.
4, simultaneously due to the advantage of magnetic latching relay own vol, the volume of this Aftercurrent protection circuit breaker can be made to be less than the volume of traditional Aftercurrent protection circuit breaker, and range of application is wider.
Accompanying drawing explanation
Fig. 1 is this Aftercurrent protection circuit breaker circuit block diagram.
Fig. 2 is this Aftercurrent protection circuit breaker circuit theory diagrams.
Fig. 3 is this Aftercurrent protection circuit breaker embodiment 2 circuit block diagram.
Fig. 4 is prior art Aftercurrent protection circuit breaker functional-block diagram.
Embodiment
Fig. 1 ~ 2 are most preferred embodiments of the present utility model, are described further below in conjunction with accompanying drawing 1 ~ 4 pair of the utility model.
As shown in Figure 1, a kind of Aftercurrent protection circuit breaker, comprises detecting unit, amplifying circuit, detection of electrical leakage comparison circuit, pulse detection comparison circuit, OR circuit, delay circuit, electronic switching circuit and magnetic latching relay.In the prior art, detecting unit adopts zero-sequence transformer to realize, the input of detected circuit access detecting unit, the input of the output access discharge circuit of detecting unit, the output of amplifying circuit accesses the input of detection of electrical leakage comparison circuit and pulse detection comparison circuit respectively, the output of detection of electrical leakage comparison circuit and pulse detection comparison circuit accesses the input of OR circuit simultaneously, the output of OR circuit connects electronic switching circuit, the output of electronic switching circuit is connected with the signal input part of magnetic latching relay, interconnect with delay circuit simultaneously.Two groups of normally opened contacts of magnetic latching relay are connected the live wire of access alternating current and zero line respectively.
Detecting unit is used for the residual current signal in testing circuit, and the residual current signal detected is sent into the amplification carrying out signal in discharge circuit, and the signal after amplification is sent in detection of electrical leakage comparison circuit and pulse detection comparison circuit by amplifying circuit respectively.When detection of electrical leakage comparison circuit or/and when the signal magnitude that pulse detection comparison circuit detects is greater than presetting threshold value, the output of OR circuit exports high level signal.The high level signal exported by OR circuit sends into electronic switching circuit.After electronic switching circuit receives the high level signal of OR circuit output, a drive singal is sent to magnetic latching relay, magnetic latching relay receive this drive singal after action, and realize the self-sustaining of state, therefore electronic switching circuit is without the need to continuing to provide voltage to magnetic latching relay.After magnetic latching relay action, the normally-closed contact in it disconnects, and the live wire of alternating current and zero line is cut off simultaneously, plays a protective role.Electronic switching circuit is after the high level signal receiving OR circuit output, Time delay circuit simultaneously, after reaching presetting time, delay circuit action, electronic switching circuit sends drive singal again to magnetic latching relay, magnetic latching relay action, and the self-sustaining realizing state, connect again by the live wire of alternating current and zero line.
As shown in Figure 2, above-mentioned detecting unit adopts zero-sequence transformer to realize (not shown in FIG.), output one end of zero-sequence transformer is connected to the in-phase input end of integrated operational amplifier U1 by resistance R1, the inverting input of other end access integrated operational amplifier U1.Resistance R1 ~ R2 and integrated operational amplifier U1 forms above-mentioned amplifying unit.When there is leakage current in circuit, integrated operational amplifier U1 exports through its output after being amplified by this signal.Exporting the rectification circuit of earth signal first through being made up of diode D1 and electric capacity C1 through integrated operational amplifier U1 output, after rectifier circuit rectifies, delivering to the inverting input of integrated operational amplifier U2 ~ U3 respectively.At the reference voltage that the in-phase input end input of integrated operational amplifier U2 is obtained by resistance R4 ~ R5 dividing potential drop, at the reference voltage that the in-phase input end input of integrated operational amplifier U3 is obtained by resistance R7 ~ R8 dividing potential drop.Integrated operational amplifier U2 forms above-mentioned detection of electrical leakage comparison circuit, and integrated operational amplifier U3 forms above-mentioned pulse detection comparison circuit.Connect respectively at the output of integrated operational amplifier U2 ~ U3 and be connected to diode D2 ~ D3, diode D2 ~ D3 is above-mentioned OR circuit, and the negative electrode of diode D2 ~ D3 accesses above-mentioned electronic switching circuit after series limiting resistor R11 simultaneously.
Electronic switching circuit is made up of triode Q1 ~ Q2, relay K A1, resistance R10, resistance R12, diode D4 and electric capacity C4.The negative pole of shunt capacitance C4, the base stage of triode Q1 and one end of resistance R12, the other end of resistance R12 and the grounded emitter of triode Q1 simultaneously after series limiting resistor R11 simultaneously of the negative electrode of diode D2 ~ D3.Power Vcc is parallel resistance R9 ~ R10, one end of relay K A1 coil and the normally opened contact of relay K A1 simultaneously.The other end positive pole of shunt capacitance C4 and the anode of diode D4 simultaneously of resistance R9, the negative electrode other end of relay K A1 in parallel and the collector electrode of triode Q2 simultaneously of diode D4, the other end collector electrode of triode Q1 in parallel, the base stage of triode Q2 simultaneously of resistance R10, the grounded emitter of triode Q2, the normally-closed contact ground connection of relay K A1.Ground connection after the not moved end series capacitance C5 of relay K A1, the coil of relay K A2, relay K A2 is the coil of above-mentioned magnetic latching relay, and the live wire of alternating current and zero line are connected on two groups of normally opened contact two ends of relay K A2 respectively.
Specific works process and operation principle as follows:
After circuit powers on, the coil of relay K A1 powers on, closed after the normally opened contact action in it, presents as the state in Fig. 2, and after the normally opened contact connection of relay K A1, the normally opened contact of relay K A2 is closed to be connected alternating current, simultaneously for electric capacity C5 charges.Power Vcc is that electric capacity C4 charges by resistance R9 simultaneously, and resistance R9 and electric capacity C4 forms above-mentioned delay circuit.When circuit is without leakage current, the output no signal of integrated operational amplifier U2 ~ U3 exports, and now triode Q1 is in cut-off state, and triode Q2 is in saturation condition, and its collector electrode place is low-voltage, and the state of relay K A1 is constant.
When there is leakage current in circuit, leakage current delivers to the inverting input of integrated operational amplifier U2 respectively after integrated operational amplifier U1 amplifies, and delivers to the inverting input of integrated operational amplifier U3 through electric capacity C3 simultaneously.When leakage current is pulse electrical signal, pulse electrical signal is loaded into the input of integrated operational amplifier U3 through electric capacity C3, when pulse signal is greater than the reference voltage of integrated operational amplifier U3 normal phase input end, the state reversion of integrated operational amplifier U3, its output passes through diode D3 and resistance R11 by the base stage of signal loading to triode Q1; When electric leakage signal is impulse form, integrated operational amplifier U2 is failure to actuate, when electric leakage signal be slowly rise time and be greater than the reference voltage of integrated operational amplifier U2 in-phase input end time, the state reversion of integrated operational amplifier U2, its output passes through diode D2 and resistance R11 by the base stage of signal loading to triode Q1, when electric leakage signal is for slowly rising, integrated operational amplifier U3 is failure to actuate.
After the base stage of triode Q1 receives signal, triode Q1 conducting, collector electrode place of triode Q2 becomes high potential, the coil power-down actions of relay K A1, now electric capacity C5 sends signal to the coil of relay K A2, and relay K A2 action also keeps, and is cut off by alternating current.After triode Q1 conducting, the delay circuit be made up of resistance R9 and electric capacity C4 is started working, when reaching the presetting time, the state of triode Q1 becomes cut-off state again, now circuit returns to operating state when powering at first, and relay K A1 ~ KA2 action again, connects interchange.
Because magnetic latching relay automatically can keep the state after its action after each action, therefore electronic switching circuit is without the need to continuing to provide voltage to magnetic latching relay, avoid the electric energy loss that continuing powers on causes, avoid the appearance of components and parts fever phenomenon simultaneously, eliminate the potential safety hazard of Yin Fareyin heating and appearance, slowed down the aging of components and parts simultaneously to a certain extent.Keep being not traditional electromagnetic type relay due to magnetic, therefore when action, sound is less, avoids the appearance of noise.Simultaneously due to the advantage of magnetic latching relay own vol, the volume of this Aftercurrent protection circuit breaker can be made to be less than the volume of traditional Aftercurrent protection circuit breaker, and range of application is wider.
Embodiment 2:
Embodiment 2 is with the difference of embodiment 1: the Aftercurrent protection circuit breaker shown in embodiment 2 is applicable to three-phase and four-line formula alternating current.As shown in Figure 3, employ magnetic latching relay four groups of normally-closed contacts in example 2, four groups of normally-closed contacts are contacted in the A phase of incoming transport electricity, B phase, C phase and zero point N respectively, when magnetic latching relay action, simultaneously by A phase, B phase, C phase and N cut-out at zero point, its course of work is identical with embodiment 1 with operation principle.
In this Aftercurrent protection circuit breaker, integrated operational amplifier can adopt the integrated transporting discharging chip of common disposable type to realize, as: LM324, LM258 etc.; OR circuit also can adopt commercially available disposable type as required or door chip realizes; Electronic switching circuit also can adopt the monostable flipflop be made up of 555 timers to realize.Magnetic latching relay also can adopt the magnetic latching relay of commercially available common model to realize, as grand HFE7 series.
The above, it is only preferred embodiment of the present utility model, be not restriction the utility model being made to other form, any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or be modified as the Equivalent embodiments of equivalent variations.But everyly do not depart from technical solutions of the utility model content, any simple modification, equivalent variations and the remodeling done above embodiment according to technical spirit of the present utility model, still belong to the protection range of technical solutions of the utility model.
Claims (6)
1. an Aftercurrent protection circuit breaker, comprise detecting unit, amplifying circuit, detection of electrical leakage comparison circuit, pulse detection comparison circuit, OR circuit, delay circuit, electronic switching circuit and relay, the input of detected circuit access detecting unit, the input of the output access amplifying circuit of detecting unit, the output of amplifying circuit accesses the input of detection of electrical leakage comparison circuit and pulse detection comparison circuit respectively, detection of electrical leakage comparison circuit, the output of pulse detection comparison circuit accesses the input of OR circuit respectively, the output of OR circuit connects electronic switching circuit, the output of electronic switching circuit is connected with the signal input part of relay, interconnect with delay circuit simultaneously, it is characterized in that: described relay is magnetic latching relay, the live wire of the contact series incoming transport electricity of magnetic latching relay, in zero line.
2. Aftercurrent protection circuit breaker according to claim 1; it is characterized in that: described detection of electrical leakage comparison circuit is the voltage comparator circuit be made up of integrated operational amplifier U2; its in-phase input end accesses the reference voltage obtained by resistance R4 ~ R5 dividing potential drop, and the output of above-mentioned amplifying circuit is connected to the inverting input of integrated operational amplifier U2.
3. Aftercurrent protection circuit breaker according to claim 1; it is characterized in that: described pulse detection comparison circuit is the voltage comparator circuit be made up of integrated operational amplifier U3; its in-phase input end accesses the reference voltage obtained by resistance R7 ~ R8 dividing potential drop, and the output of above-mentioned amplifying circuit is connected to the inverting input of integrated operational amplifier U3 by electric capacity C3.
4. Aftercurrent protection circuit breaker according to claim 1, it is characterized in that: described electronic switching circuit comprises triode Q1 ~ Q2, relay K A1, resistance R10, resistance R12, diode D4 and electric capacity C4, the output of described OR circuit to be connected after a current-limiting resistance negative pole of shunt capacitance C4 simultaneously, the base stage of triode Q1 and one end of resistance R12, the other end of resistance R12 and the grounded emitter of triode Q1; Power Vcc is parallel resistance R9 ~ R10, one end of relay K A1 coil and the normally opened contact of relay K A1 simultaneously; The other end positive pole of shunt capacitance C4 and the anode of diode D4 simultaneously of resistance R9, the negative electrode other end of relay K A1 in parallel and the collector electrode of triode Q2 simultaneously of diode D4, the other end collector electrode of triode Q1 in parallel, the base stage of triode Q2 simultaneously of resistance R10, the grounded emitter of triode Q2, the normally-closed contact ground connection of relay K A1; Ground connection after the not moved end series capacitance C5 of relay K A1, the coil of relay K A2.
5. Aftercurrent protection circuit breaker according to claim 1, is characterized in that: described alternating current is the two-phase alternating current comprising live wire L and zero line N.
6. Aftercurrent protection circuit breaker according to claim 1, is characterized in that: described alternating current be comprise A phase, B phase, C phase three-phase firewire and zero point N three-phase four-wire system alternating current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420627605.9U CN204167871U (en) | 2014-10-28 | 2014-10-28 | A kind of Aftercurrent protection circuit breaker |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420627605.9U CN204167871U (en) | 2014-10-28 | 2014-10-28 | A kind of Aftercurrent protection circuit breaker |
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| Publication Number | Publication Date |
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| CN204167871U true CN204167871U (en) | 2015-02-18 |
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| CN201420627605.9U Expired - Fee Related CN204167871U (en) | 2014-10-28 | 2014-10-28 | A kind of Aftercurrent protection circuit breaker |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105071343A (en) * | 2015-08-20 | 2015-11-18 | 浙江凯发电气股份有限公司 | Execution circuit of self-recovery leakage protector |
| CN105186447A (en) * | 2015-08-20 | 2015-12-23 | 浙江凯发电气股份有限公司 | Automatic recovery electric leakage controller circuit |
| CN105529680A (en) * | 2015-08-20 | 2016-04-27 | 浙江凯发电气股份有限公司 | Electric leakage and pulse current detection circuit |
| CN106526404A (en) * | 2016-12-09 | 2017-03-22 | 成都信息工程大学 | Short circuit and leakage detection device and detection method thereof |
| CN109545633A (en) * | 2018-11-16 | 2019-03-29 | 深圳供电局有限公司 | Permanent magnet circuit breaker |
| WO2021160179A1 (en) * | 2020-02-13 | 2021-08-19 | 浙江正泰电器股份有限公司 | Circuit breaker |
| CN118572639A (en) * | 2024-08-01 | 2024-08-30 | 浙江迪尔逊科技有限公司 | Fireproof current-limiting protector and working method thereof |
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2014
- 2014-10-28 CN CN201420627605.9U patent/CN204167871U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105071343A (en) * | 2015-08-20 | 2015-11-18 | 浙江凯发电气股份有限公司 | Execution circuit of self-recovery leakage protector |
| CN105186447A (en) * | 2015-08-20 | 2015-12-23 | 浙江凯发电气股份有限公司 | Automatic recovery electric leakage controller circuit |
| CN105529680A (en) * | 2015-08-20 | 2016-04-27 | 浙江凯发电气股份有限公司 | Electric leakage and pulse current detection circuit |
| CN106526404A (en) * | 2016-12-09 | 2017-03-22 | 成都信息工程大学 | Short circuit and leakage detection device and detection method thereof |
| CN106526404B (en) * | 2016-12-09 | 2022-12-30 | 成都信息工程大学 | Short circuit and electric leakage detection device and detection method thereof |
| CN109545633A (en) * | 2018-11-16 | 2019-03-29 | 深圳供电局有限公司 | Permanent magnet circuit breaker |
| WO2021160179A1 (en) * | 2020-02-13 | 2021-08-19 | 浙江正泰电器股份有限公司 | Circuit breaker |
| CN118572639A (en) * | 2024-08-01 | 2024-08-30 | 浙江迪尔逊科技有限公司 | Fireproof current-limiting protector and working method thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150218 Termination date: 20211028 |
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| CF01 | Termination of patent right due to non-payment of annual fee |