CN101938111B - Control device and control method for residual current circuit breaker - Google Patents
Control device and control method for residual current circuit breaker Download PDFInfo
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- CN101938111B CN101938111B CN200910151533.9A CN200910151533A CN101938111B CN 101938111 B CN101938111 B CN 101938111B CN 200910151533 A CN200910151533 A CN 200910151533A CN 101938111 B CN101938111 B CN 101938111B
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- signal
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- output signal
- residual current
- circuit breaker
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
- H02H3/32—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
- H02H3/33—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0038—Details of emergency protective circuit arrangements concerning the connection of the detecting means, e.g. for reducing their number
- H02H1/0053—Means for storing the measured quantities during a predetermined time
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
- Breakers (AREA)
Abstract
The invention provides a control device and a control method for a residual current circuit breaker. The control device comprises a signal amplification unit and a signal holding unit, wherein the signal amplification unit is used for amplifying a received leakage signal and then outputting a first output signal; and the signal holding unit is used for receiving the first output signal output by the signal amplification unit, broadening the first output signal with set time length and then generating a second output signal, and outputting the second output signal for trigging an execution unit in the residual current circuit breaker to switch off a leakage switch. The working time of a trip coil is ensured in a mode of broadening the first output signal with the set length, the use requirement of a bidirectional inlet wire can be ensured without adding an auxiliary mechanical breakpoint, more cost is saved and the volume of the residual current circuit breaker is reduced.
Description
Technical field
The present invention relates to protecting safety of circuit technology, particularly control device and the control method in a kind of residual current circuit breaker.
Background technology
In low power system, for the circuit in system carries out security protection, usually safety protection equipment can be set, residual current circuit breaker is exactly wherein a kind of.When residual current circuit breaker can occur galvanic current in circuit system being detected, control final controlling element and disconnect leakage switch, make load power-off.
The structure of existing residual current circuit breaker as shown in Figure 1, mainly comprise: detection of electrical leakage unit 100, amplifying unit 110, latch units 120 and performance element 130, wherein, 100 pairs of detection of electrical leakage unit circuit system detects, the electric leakage signal detecting is sent into amplifying unit 110 and amplify processing, because the electric leakage signal detecting may be unsettled signal, after latching processing, the signal after 120 pairs of amplifying units of latch units 110 are processed sends into performance element 130.Conventionally performance element 130 is by driving signal generating unit 131 and tripping coil 132 to form, driving signal generating unit 131 can be the likes such as controllable silicon, receive after the latch signal of latch units 120 outputs, when reaching silicon controlled conducting requirement, produce and drive signal to tripping coil 132, cause tripping coil 132 to be threaded off, leakage switch is turn-offed, now load power-off.
But, while adopting above-mentioned residual current circuit breaker, even if circuit system electric leakage detected, cause leakage switch to turn-off, but the effect of latching due to latch units 120, latch units 120 all the time can output latch signal, cause tripping coil 132 still can under lasting driving signal function, work, until drive signal generating unit 131 or tripping coil 132 to damage such as silicon controlled.In order to overcome this problem, residual current circuit breaker can be set only from load-side power taking, when circuit system electric leakage being detected, cause leakage switch pass to be had no progeny, load power-off, residual current circuit breaker also quits work, and latch units 120 can output latch signal yet.But the user demand for residual current circuit breaker is two-way inlet wire in the market, be that residual current circuit breaker not only can be from load-side power taking, also can be from mains side power taking, therefore,, in order to meet two-way inlet wire demand, can in residual current circuit breaker, increase auxiliary mechanical breakpoint, make leakage switch when off state, residual current circuit breaker is simultaneously in breakpoint state, and still, auxiliary mechanical breakpoint can increase the volume of cost and residual current circuit breaker.
Summary of the invention
In view of this, the invention provides control device and control method in a kind of residual current circuit breaker, so that meet on the basis of two-way inlet wire demand, reduce the volume of cost and residual current circuit breaker.
Concrete technical scheme is as follows:
A control device in residual current circuit breaker, this control device comprises:
Signal amplification unit, after the electric leakage signal receiving is amplified, output the first output signal;
Signal holding unit, for receiving the first output signal of described signal amplification unit output, after the first output signal is widened to setting-up time length, produce the second output signal, and export the second output signal and turn-off leakage switch for triggering the performance element of described residual current circuit breaker.
Wherein, described signal holding unit comprises:
Signal amplification circuit, for receiving the first output signal of described signal amplification unit output, amplifies rear generation the first M signal to described the first output signal;
Charge-discharge circuit, for receiving described the first M signal, produces the second output signal after described the first M signal being widened to setting-up time length by quick charge process, and wherein, described setting-up time length is by the Time dependent of charging process.
Particularly, described charge-discharge circuit is RC circuit, and this RC electricity routing resistance and Capacitance parallel connection form, and its this RC circuit is connected with described signal amplification circuit.
More preferably, described signal holding unit also comprises: first signal optimized circuit, for the first output signal of described signal amplification unit output is carried out to filtering processing, and offers described signal amplification circuit by the first output signal after processing.
Described signal holding unit also comprises: secondary signal optimized circuit, carries out exporting to after current limliting processing the performance element of described residual current circuit breaker for the second output signal that described charge-discharge circuit is produced.
In addition, described signal amplification unit is by realizing for earth leakage protective integrated circuit.
A control method in residual current circuit breaker, this control method comprises:
After signal amplification unit amplifies the electric leakage signal receiving, output the first output signal;
Signal holding unit produces the second output signal after the first output signal of described signal amplification unit output is widened to setting-up time length, and exports the second output signal and turn-off leakage switch for triggering the performance element of described residual current circuit breaker.
Particularly, described signal holding unit is widened the first output signal of described signal amplification unit output to produce the second output signal after setting-up time length and comprise: described signal holding unit amplifies rear generation the first M signal by the first output signal of described signal amplification unit output; After described the first M signal being widened to setting-up time length by quick charge process, produce the second output signal; Wherein, described setting-up time length is by the Time dependent of charging process.
More preferably, this control method also comprises: the first output signal to described signal amplification unit output is carried out filtering processing;
Described signal holding unit is widened setting-up time length by the first output signal of described signal amplification unit output and is specially: described signal holding unit is widened setting-up time length by first output signal of carrying out after described filtering processing.
This control method also comprises: the second output signal of described signal holding unit output is carried out exporting to the performance element in described residual current circuit breaker after current limliting processing.
By above description, can be found out, the present invention produces the second output signal after the first output signal of signal amplification unit output being widened to preseting length by signal holding unit, and exports the second output signal and turn-off leakage switch for triggering performance element.That is to say, the present invention guarantees the operating time of tripping coil by the first output signal being widened to the mode of preseting length, in the present invention, electric leakage signal being detected makes after leakage switch shutoff and then load power-off, while adopting two-way wire leading method, if employing Power supply, leakage current after load power-off, no longer detected, signal amplification unit is also no longer exported the first output signal, correspondingly, signal holding unit can not exported the second output signal yet, controllable silicon and tripping coil in performance element quit work, avoided the damage of controllable silicon and tripping coil, this mode is meeting on two-way inlet wire Demand Base, also without the extra mechanical breakpoint of assisting that increases, thereby saved cost, also reduce can residual current circuit breaker volume.
Accompanying drawing explanation
Fig. 1 is the composition schematic diagram of residual current circuit breaker of the prior art.
The composition schematic diagram of the residual current circuit breaker that Fig. 2 provides for the embodiment of the present invention.
Fig. 3 is the example block diagram of residual current circuit breaker in prior art.
The example block diagram of the residual current circuit breaker that Fig. 4 provides for the embodiment of the present invention.
The example block diagram of the signal holding unit that Fig. 5 provides for the embodiment of the present invention.
The major control method flow diagram that Fig. 6 provides for the embodiment of the present invention.
Embodiment
In order to make the object, technical solutions and advantages of the present invention clearer, below in conjunction with the drawings and specific embodiments, describe the present invention.
Basic thought of the present invention is mainly: adopt signal holding unit to replace the latch units in residual current circuit breaker, this signal holding unit adopts the mode of widening signal to meet the duration requirement to triggering signal in performance element.
In order conveniently to understand the present invention, first the control device in residual current circuit breaker provided by the present invention is described in detail.The composition schematic diagram of the residual current circuit breaker that Fig. 2 provides for the embodiment of the present invention, in Fig. 2, detection of electrical leakage unit 100 and performance element 130 are same as the prior art, do not repeat them here.Control device in this residual current circuit breaker as shown in Figure 2, can comprise: signal amplification unit 210 and signal holding unit 220.
Wherein, after 210 pairs of electric leakage signals that receive of signal amplification unit amplify, output the first output signal.
Signal holding unit 220 receives the first output signal of signal amplification unit 210 outputs, after the first output signal is widened to setting-up time length, produce the second output signal, and export the second output signal and turn-off leakage switch for triggering the performance element 130 of residual current circuit breaker.
In this control device, signal amplification unit 210 can adopt for earth leakage protective integrated circuit and realize, such as the more common similar chips such as VG54123 on domestic earth leakage protective product.
Particularly, above-mentioned signal holding unit 220 can comprise: signal amplification circuit 221 and charge-discharge circuit 222.
Signal amplification circuit 221 receives the first output signal of signal amplification unit 210 outputs, and the first output signal is amplified to rear generation the first M signal.
Charge-discharge circuit 222 receives the first M signal that signal amplification circuits 221 produce, and produces the second output signal after the first M signal being widened to setting-up time length by quick charge process, and wherein, setting-up time length is by the Time dependent of charging process.
Wherein, signal amplification unit 210 can be by realizations such as triode or amplifier tubes.
Charge-discharge circuit 222 can be RC circuit, and this RC electricity routing resistance and Capacitance parallel connection form, its these RC circuit and signal amplifying circuit 210 series connection.
For the signal that signal holding unit is produced, further optimize, signal holding unit 220 can also comprise: one or its combination in first signal optimized circuit 223 or secondary signal advantage circuit 224.
Wherein, first signal optimized circuit 223 can carry out filtering processing to the first output signal of signal amplification unit 210 outputs, and the first output signal after processing is offered to signal amplification circuit 221.This first signal optimized circuit 223 can be, but not limited to realize by a filter capacitor is set.
The second output signal that secondary signal optimized circuit 224 can produce charge-discharge circuit 222 carries out exporting to the performance element 130 in residual current circuit breaker after current limliting processing.
Below in conjunction with concrete example, above-mentioned control device is described in detail.At this, with signal amplification unit, by VG54123 chip, be embodied as example, prior art and control device provided by the invention are contrasted to description.
Fig. 3 is the example block diagram of residual current circuit breaker in prior art, as Fig. 3 institute not, the output Pin4 of the amplifier in prior art in VG54123 chip is connected with the input Pin5 of latch module, the output Pin7 of latch module is connected with controllable silicon Q1, wherein controllable silicon Q1 is the driving signal generating unit in performance element, when the high level of exporting by Pin7 when latch module reaches the angle of flow of Q1, Q1 conducting, produce and drive signal to tripping coil, tripping coil work is turn-offed leakage switch.In this example, even if turn-offing, leakage switch makes load power-off, while adopting two-way wire leading method, if employing Power supply, due to the effect of latching of latch module, still can continue to produce high level, make topological coil continuous firing, until Q1 or tripping coil damage.If keep two-way wire leading method, settling mode need to adopt the auxiliary mechanical breakpoint of increase of mentioning in background technology.
The example block diagram of the residual current circuit breaker that Fig. 4 provides for the embodiment of the present invention, as shown in Figure 4, the output Pin4 of the amplifier in VG54123 chip is directly connected with signal holding unit, bypass the latch module in VG54123 chip.Amplifier is exported first by Pin4 and is outputed signal to signal holding unit.After signal holding unit is widened setting-up time length by this first output signal, export second and output signal to controllable silicon Q1, when the second output signal reaches the angle of flow of Q1, Q1 conducting, produces and drives signal to tripping coil, and tripping coil work is turn-offed leakage switch.
It should be noted that, be not that the driving signal of burst just can make tripping coil work, but need the driving signal of certain time can make tripping coil work, this lasting certain hour is commonly referred to the operating time of tripping coil.It is that the second output signal in order to export can make the ON time of Q1 can meet the operating time demand of tripping coil that signal holding unit is widened setting-up time length by the first output signal.
In the exemplary construction shown in Fig. 4, leakage switch turn-offs and makes after load power-off, while adopting two-way wire leading method, if adopt Power supply, leakage current after load power-off, no longer detected, amplifier is also no longer exported the first output signal, and correspondingly, signal holding unit is also no longer exported the second output signal, Q1 and tripping coil quit work, avoided the damage of controllable silicon and tripping coil, this mode is meeting on two-way inlet wire Demand Base, also without the extra mechanical breakpoint of assisting that increases.
Signal holding unit provided by the present invention makes this residual current circuit breaker not only can be applicable to AC type leakage switch, is also applicable to A type leakage switch.
The example block diagram of the signal holding unit that Fig. 5 provides for the embodiment of the present invention, as shown in Figure 5, the first output signal that amplifier is exported by Pin4 forms the first M signal after the amplification of triode U1, deliver to again the RC charge-discharge circuit that R3 and C1 form, by the charging process of C1 is widened to processing to the first M signal of U1 output.The processing of widening is here in fact that the first M signal is stored, thereby realize waveform from being too narrow to wide processing, guarantee that the high level of output can meet the operating time demand of tripping coil, the time span of specifically widening can realize (resistance R 2 can not arrange yet) by adjusting the parameter of R3, C1 and R2.Capacitor C 2 in Fig. 5, for the first output signal of Pin4 output is carried out to filtering processing, is disturbed with clutter reduction.Resistance R 1 is carried out current limliting processing for realizing to the second output signal of output, and triode U2, for increasing input impedance, is the more excellent realization of signal holding unit.
The structure of the control method of residual current circuit breaker provided by the present invention based on above-mentioned control device realizes, and its main implementation procedure can as shown in Figure 6, mainly comprise the following steps:
Step 601: after signal amplification unit amplifies the electric leakage signal receiving, output the first output signal.
Step 602: signal holding unit produces the second output signal after the first output signal of signal amplification unit output is widened to setting-up time length, and export the second output signal and turn-off leakage switch for triggering the performance element of residual current circuit breaker.
In this step, signal holding unit can amplify rear generation the first M signal by the first output signal of signal amplification unit output; After the first M signal being widened to setting-up time length by quick charge process, produce the second output signal; Wherein, described setting-up time length is by the Time dependent of charging process.
More preferably, can carry out filtering processing to the first output signal of signal amplification unit output, signal holding unit is widened preseting length and is produced the second output signal carrying out the first output signal after filtering processing.
In addition, the second output signal of signal holding unit output can further carry out exporting to the performance element in residual current circuit breaker after current limliting processing.
By above description, can be found out, the present invention produces the second output signal after the first output signal of signal amplification unit output being widened to preseting length by signal holding unit, and exports the second output signal and turn-off leakage switch for triggering performance element.That is to say, the present invention guarantees the operating time of tripping coil by the first output signal being widened to the mode of preseting length, in the present invention, electric leakage signal being detected makes after leakage switch shutoff and then load power-off, while adopting two-way wire leading method, if employing Power supply, leakage current after load power-off, no longer detected, signal amplification unit is also no longer exported the first output signal, correspondingly, signal holding unit can not exported the second output signal yet, controllable silicon and tripping coil in performance element quit work, avoided the damage of controllable silicon and tripping coil, this mode is meeting on two-way inlet wire Demand Base, also without the extra mechanical breakpoint of assisting that increases, thereby saved cost, also reduce can residual current circuit breaker volume.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of making, be equal to replacement, improvement etc., within all should being included in the scope of protection of the invention.
Claims (6)
1. the control device in residual current circuit breaker, is characterized in that, this control device comprises:
Signal amplification unit, after the electric leakage signal receiving is amplified, output the first output signal;
Signal holding unit, for receiving the first output signal of described signal amplification unit output, after the first output signal is widened to setting-up time length, produce the second output signal, and export the second output signal and turn-off leakage switch for triggering the performance element of described residual current circuit breaker
Wherein, described signal holding unit comprises: signal amplification circuit, for receiving the first output signal of described signal amplification unit output, amplifies rear generation the first M signal to described the first output signal;
Charge-discharge circuit, for receiving described the first M signal, produces the second output signal after described the first M signal being widened to setting-up time length by quick charge process, and wherein, described setting-up time length is by the Time dependent of charging process;
First signal optimized circuit, be connected to the performance element in described charge-discharge circuit and described residual current circuit breaker, for the second output signal that described charge-discharge circuit is produced, carry out exporting to after current limliting processing the performance element of described residual current circuit breaker.
2. control device according to claim 1, is characterized in that, described charge-discharge circuit is RC circuit, and this RC electricity routing resistance and Capacitance parallel connection form, and this RC circuit is connected with described signal amplification circuit.
3. control device according to claim 1, it is characterized in that, described signal holding unit also comprises: secondary signal optimized circuit, for the first output signal of described signal amplification unit output is carried out to filtering processing, and the first output signal after processing is offered to described signal amplification circuit.
4. according to the control device described in the arbitrary claim of claims 1 to 3, it is characterized in that, described signal amplification unit is by realizing for earth leakage protective integrated circuit.
5. the control method in residual current circuit breaker, is characterized in that, this control method comprises:
After signal amplification unit amplifies the electric leakage signal receiving, output the first output signal;
Described signal holding unit amplifies rear generation the first M signal by the first output signal of described signal amplification unit output;
After described the first M signal being widened to setting-up time length by quick charge process, produce the second output signal; Wherein, described setting-up time length is by the Time dependent of charging process;
The second output signal of described signal holding unit output is carried out exporting to the performance element in described residual current circuit breaker after current limliting processing, for triggering the performance element of described residual current circuit breaker, turn-off leakage switch.
6. control method according to claim 5, is characterized in that, this control method also comprises: the first output signal to described signal amplification unit output is carried out filtering processing;
Described signal holding unit is widened setting-up time length by the first output signal of described signal amplification unit output and is specially: described signal holding unit is widened setting-up time length by first output signal of carrying out after described filtering processing.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910151533.9A CN101938111B (en) | 2009-06-30 | 2009-06-30 | Control device and control method for residual current circuit breaker |
| GB201008761A GB2472670B (en) | 2009-06-30 | 2010-05-26 | A control device and control method for residual current circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910151533.9A CN101938111B (en) | 2009-06-30 | 2009-06-30 | Control device and control method for residual current circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101938111A CN101938111A (en) | 2011-01-05 |
| CN101938111B true CN101938111B (en) | 2014-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200910151533.9A Expired - Fee Related CN101938111B (en) | 2009-06-30 | 2009-06-30 | Control device and control method for residual current circuit breaker |
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| Country | Link |
|---|---|
| CN (1) | CN101938111B (en) |
| GB (1) | GB2472670B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105305374B (en) * | 2015-10-27 | 2018-06-05 | 黄金和 | Leakage current detection protection circuit with accurate overload protection function |
| CN109347062A (en) * | 2019-01-04 | 2019-02-15 | 江苏万帮德和新能源科技股份有限公司 | Self-checking system of leaking electricity and its working method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4441134A (en) * | 1981-03-18 | 1984-04-03 | Jacques Lewiner | Circuit breakers sensitive to leakage currents |
| CN1144248C (en) * | 1996-07-09 | 2004-03-31 | 富士电机株式会社 | Earth leakage breaker |
| CN100459351C (en) * | 2002-06-24 | 2009-02-04 | 沙基拉有限公司 | Residual current detection circuit |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86105323B (en) * | 1986-08-29 | 1988-01-13 | 陈策沾 | Full-automatic electric shock safety equipment |
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2009
- 2009-06-30 CN CN200910151533.9A patent/CN101938111B/en not_active Expired - Fee Related
-
2010
- 2010-05-26 GB GB201008761A patent/GB2472670B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4441134A (en) * | 1981-03-18 | 1984-04-03 | Jacques Lewiner | Circuit breakers sensitive to leakage currents |
| CN1144248C (en) * | 1996-07-09 | 2004-03-31 | 富士电机株式会社 | Earth leakage breaker |
| CN100459351C (en) * | 2002-06-24 | 2009-02-04 | 沙基拉有限公司 | Residual current detection circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| GB201008761D0 (en) | 2010-07-14 |
| CN101938111A (en) | 2011-01-05 |
| GB2472670A (en) | 2011-02-16 |
| GB2472670B (en) | 2012-05-02 |
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