CN1079601C - Method and device for separating animal's electric shock signal - Google Patents
Method and device for separating animal's electric shock signal Download PDFInfo
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Abstract
The present invention relates to a method and a device for separating animal's electric shock signals in an AC network, and the device can be combined with a trip actuating device to form a residual current operated protective device (electric shock and leakage protector). An electric shock signal separation procedure is an A/D changeover circuit converts residual current or residual current variable quantity to digital quantity and conveys the digital quantity to an analytical judge circuit for analyzing the variable value of the residual current, forming a judgment and carrying out control. The device of the present invention has the advantages of large security protection range, little unnecessary trip operation, etc., increases power supply quality, reduces nullification work load of a power supply manager, and further increases the operation rate of a residual current operated protective devices simultaneously.
Description
The present invention relates to a kind of emergency protective device, the separation method and the device thereof of residual current signal in specifically a kind of AC network, this device promptly constitute RCD after making up with dropout actuator.
In background technology; widely used RCD steelyard slepsydra non-electricity protector again in the AC network; its basic functional principle is that zero sequence current mutual inductor is connected in the AC network circuit; the residual current of zero sequence current mutual inductor secondary side output AC power network line; with the leakage current situation between reflection AC network and the earth; animal's electric shock or electric wiring take place between AC power phase line and the earth; during equipment electric leakage situation; the residual current of zero sequence current mutual inductor output changes; when detecting the residual current variation and reaching rated value; start tripping mechanism excision power supply, to reach the life that watches for animals; avoid taking place the purpose of electric accident.
From the principles of electric and electronic engineering, it also is that a kind of leaky and electric wiring, equipment electric leakage there is no difference in essence that animal's electric shock takes place between AC power phase line and the earth.But flow through animal particularly the safe current value and permission electric wiring of human body; the current value of equipment electric leakage is compared much smaller; for the life security that watches for animals; reduce the purpose of inessential dropout action; residual current is to increase suddenly during according to the generation human electric shock; and line electrical leakage is the characteristics that slowly increase in the ordinary course of things; two desired action current values of common RCD operated by rotary motion: a sudden change desired action current by the safe current value of the human body that allows to flow through, another is for by allowing electric wiring; the gradual desired action current of safe current value of equipment electric leakage.
But because electric wiring electric leakage or electric equipment leak electricity along with the closure and the disconnection of line shunting switch or facility switching, the residual current signal of its reflection also is to change suddenly.Analyze according to statistics; common RCD sudden change dropout action frequency is that reasons such as electric wiring or power consumption equipment Leaked Current of Line to Ground cause more than 99%; though leakage current value surpasses the safe current value of human body during the dropout action; but great majority do not reach electric wiring as yet, equipment allows the degree of electric leakage, so belong to inessential dropout action.
Because of common RCD exists the more shortcoming of inessential dropout action; not only the electric consumer is caused inconvenience; the power supply management person has also increased the non-productive work amount, and present inessential dropout action is more to be the not high main reason of RCD operational percentage.
If can from residual current, isolate animal's electric shock signal and electric wiring, equipment electric leakage signal; the animal's electric shock desired action current of RCD is got smaller value; electric wiring, equipment electric leakage desired action current value are got higher value; the inessential dropout action that reduces electric wiring, equipment electric leakage causing RCD can be reached, the fail safe purpose of protection system can be improved again.
In order from residual current, to isolate animal's electric shock signal; that once propose to adopt the frequency discrimination method isolates the animal's electric shock signal device; for example notification number is " full-automatic electric shock protector " patent of CN86105323; operation principle is to be animal's electric shock in the radio-frequency component differentiation that residual current occurs outside the power supply fundamental frequency; the method of its separating animal's electric shock signal truly has distinctive feature; but in actual applications, adopt frequency differentiate the separating animal's electric shock signal method RCD also exist the more situation of inessential dropout action sometimes.Tracing it to its cause is the generally use of equipment such as reasons such as the non-linear and magnetic saturation of the energized circuit of generator, transformer-supplied equipment of AC network and nonlinear impedance power load such as controllable silicon phase-controlled power, RHVC, electronic energy-saving lamp, and AC network itself just exists a large amount of non-power supply fundamental component; Also there are non-linear factor in the picking up of residual current signal, amplifying device, above-mentioned situation makes and exists non-power supply fundamental component all the time in the residual current signal, sometimes even can reach very big deal, adopt method that frequency differentiates can't distinguish the non-power supply fundamental frequency deal that animal's electric shock or the interference of AC network cause when big and increase disturbing.
The object of the invention provides animal's electric shock signal and electric wiring in a kind of accurate separation residual current, the equipment sudden change is leaked electricity and the method and the device thereof of gradual electric leakage signal, to solve the more defective of inessential dropout action that existing RCD exists.
To achieve these goals; I have carried out a large amount of tests to animal and even self human body; angular frequency t and current i graph of relation (seeing accompanying drawing 1) when drawing typical 220V sinusoidal voltage and flowing through animal and human body; draw that typical alternating-current electric circuit bumps ground suddenly and the angular frequency t and the current i graph of relation (seeing accompanying drawing 2) of residual current during closed Leaked Current of Line to Ground power consumption equipment through my test; draw the time T and the electric current I graph of relation (seeing accompanying drawing 3) of the electric leakage of alternating-current electric line-to-ground according to documents such as " electronic science and technologies-current mode low pressure electric protective device monograph " in 1984 simultaneously, and the 16th hour several cycle residual current angular frequency t of accompanying drawing 3 and current i graph of relation (seeing accompanying drawing 4).From accompanying drawing 1, can find out, when the animal's electric shock accident takes place, the electric current of animal of flowing through is bells, and current amplitude is rising gradually in very short time, promptly when human electric shock's accident takes place, human body impedance has the variation with voltage in cycle of alternating current to present non-linear phenomena, and human body impedance also has one to descend gradually until stable process under the function of current of continuous several cycles; Can find out that from accompanying drawing 2 power consumption equipment that bumps ground or open Leaked Current of Line to Ground at the alternating-current electric circuit causes that it is an amplitude substantially invariable sine wave curve of amplitude then that rises suddenly that residual current changes; From accompanying drawing 4, can find out, though cause that in the electric leakage of the 16th hour alternating-current electric line-to-ground the residual current amplitude has bigger increase, several cycle in the time residual current amplitude be still the sine wave curve of slow variation.
According to sinusoidal ac particularly the flow through different characteristics of human body and electric wiring, equipment Leaked Current of Line to Ground of animal of flowing through, the present invention proposes the method for separating animal's electric shock signal in a kind of succinct residual current: the residual current of sampling AC network, the residual electricity flow valuve that compares the sinusoidal ac identical moment of angular frequency, according to the waveform of the residual current that change to increase and change the amplitude variations of the residual current that increases, can differentiate in the AC network animal's electric shock or electric wiring, equipment Leaked Current of Line to Ground take place, to reach the separation purpose.
Separate in the residual current animal's electric shock signal device by zero sequence current mutual inductor, the residual current amplifying circuit, the A/D change-over circuit, the analysis and judgement circuit, power circuit constitutes, and the analysis and judgement circuit is made of microprocessor.The animal's electric shock signal process is that the A/D change-over circuit converts residual current or residual current variable quantity digital quantity to and send the analysis and judgement circuit in the separation residual current, analysis and judgement circuit analysis residual current changes and judges, it is characterized in that differentiating residual current specific waveforms and residual current variable quantity, and take the following step:
(1) sampling residual electricity flow valuve.
(2) cycle compares the residual electricity flow valuve in the sinusoidal ac identical moment of angular frequency one by one.
(3) calculate the residual current variable quantity.
(4) when half cycle of residual current that change to increase be bells or change the residual current amplitude that increases in 3 cycles one by one cycle rise and when reaching rated value, judge that changing the residual current that increases is the animal's electric shock electric current.
(5) reach output animal's electric shock signal when giving the value of putting when the amplitude of animal's electric shock electric current and duration.
The theory signal digitalized according to continuous electric: at continuous time signal is f (t), when its higher cutoff frequency is fm, with the time interval is
Switching signal f (t) is sampled, then f (t) just can be by the Nyquist sampling theorem that discrete signal fs (t)=f (nTs) represents after this sampling as can be known, the sinusoidal ac of 50Hz need only sample each second 〉=can digitlization be described by this electric current 100 times, again because 120 ° of every phase phase differences of three-phase alternating current, so the present invention is each cycle of sinusoidal ac 6 times to the minimum sampling frequency of residual current.Certainly along with the raising of sampling frequency, can more accurately describe residual current waveform, thereby reduce the insensitive regional scope of the protection of RCD in actual motion.
Substantially being ohmic situation according to human body under the simple sinusoidal alternating current effect, is 30 °, 90 °, 150 °, 210 °, 270 °, 330 ° moment of the relative sinusoidal ac angular frequency of residual current at each cycle of sinusoidal ac during to residual current sampling 6 times the optimal sampling time.
The device that separates animal's electric shock signal in the residual current promptly is combined into RCD after increasing dropout actuator.RCD with separating animal's electric shock signal device; can be provided with one by the animal's electric shock desired action current of the safe current value of the human body that allows to flow through be provided with one by allowing electric wiring; the gradual desired action current of the safe current value of equipment electric leakage; also can be provided with one between animal's electric shock and gradual electric leakage desired action current value; the sudden change desired action current of scope within the 50-100 milliampere; the sudden change desired action current still is set, and mainly to act on be to get an electric shock if human body is in very to cause in the water in the wet environment; the electric current of human body of flowing through rises to bigger numerical value and constant at the utmost point in the short time; the residual current that change this moment " is bells; current amplitude rises gradually " in very short time animal's electric shock feature is very unobvious; but this moment, human body impedance was about about 500-1000 ohm; the body current of flowing through when alternating voltage is 220 volts must reach sudden change desired action current value, and RCD also can be threaded off rapidly.
The present invention separates that the animal's electric shock signal method is the residual electricity flow valuve in the comparison sinusoidal ac identical moment of angular frequency in the residual current, does not respond not changing or change the residual current that descends, so the stronger anti-dried ability of scratching is arranged; To the electric leakage of electric wiring, equipment only when leakage current rises suddenly and reach bigger sudden change desired action current value or the electric leakage of slowly rising start tripping mechanism when reaching gradual electric leakage desired action current value, so can obviously reduce the inessential dropout action of electric wiring, equipment electric leakage causing RCD, thereby can improve the operational percentage of AC network residual current operated protective device largely; Sensitive because of what can set again to animal's electric shock desired action current value, so also have the high characteristics of coefficient of safety.
Description of drawings of the present invention is as follows:
Accompanying drawing 1 is the flow through angular frequencies of animal and human body of typical 220 volts of sinusoidal voltages
ω t and current i graph of relation.
Accompanying drawing 2 is that the alternating-current electric circuit bumps ground and the angle of residual current during the power consumption equipment Leaked Current of Line to Ground
Frequencies omega t and current i graph of relation.
Accompanying drawing 3 is time T and electric current I graph of relation of alternating-current electric line-to-ground electric leakage.
Accompanying drawing 4 is angular frequency t of alternating-current electric line-to-ground electric leakage in the 16th hour of accompanying drawing 3
With the current i graph of relation.
Accompanying drawing 5,6 is two kinds of separator circuit structure block diagrams of the present invention.
Accompanying drawing 7 is electrical schematic diagrams of accompanying drawing 5 structured flowcharts.
Accompanying drawing 8 is electrical schematic diagrams of accompanying drawing 6 structured flowcharts.
Accompanying drawing 9 is that journey is judged, handled to 6 pairs of animal's electric shock signals of analysis and judgement circuit of accompanying drawing 5
The flow chart of preface.
Accompanying drawing 10 be the electric leakage signals that 6 pairs in the analysis and judgement circuit of accompanying drawing 5 increases suddenly judge,
The flow chart of handling procedure.
Accompanying drawing 11 be the electric leakage signals that 6 pairs in the analysis and judgement circuit of accompanying drawing 5 slowly increases judge,
The flow chart of handling procedure.
Accompanying drawing 12 is that journey is judged, handled to 6 pairs of animal's electric shock signals of analysis and judgement circuit of accompanying drawing 6
The flow chart of preface.
Accompanying drawing 13 be the electric leakage signals that 6 pairs in the analysis and judgement circuit of accompanying drawing 6 increases suddenly judge,
The flow chart of handling procedure.
Accompanying drawing 14 be the electric leakage signals that 6 pairs in the analysis and judgement circuit of accompanying drawing 6 slowly increases judge,
The flow chart of handling procedure.
The present invention will be described in detail with embodiment in conjunction with the accompanying drawings.
Embodiment 1:
For data processing amount and the memory span that reduces the analysis and judgement circuit, reduce the cost that separates animal's electric shock signal device in the residual current, present embodiment has residual current sudden change amount pre-separation circuit and adopts simple A/D change-over circuit conversion residual current sudden change amount, and its circuit structure is seen accompanying drawing 5.
Present embodiment is by zero sequence current mutual inductor 1; residual current amplifying circuit 2; residual current sudden change amount split circuit 3; residual current sudden change amount A/D change-over circuit 4; gradual residual current testing circuit 5; analysis and judgement circuit 6; power circuit 7 constitutes; analysis and judgement circuit 6 is made of microprocessor; the device that separates animal's electric shock signal in the residual current is after increasing dropout actuator 8; promptly be combined into RCD; annexation is between it: three-phase alternating-current supply meets O; A; B; the C terminal; the three-phase and four-line lead is equidirectional to pass zero sequence current mutual inductor 1 after dropout actuator 8 to load-side O '; A '; B '; C ' terminal; the input of the secondary side joint residual current amplifying circuit 2 of zero sequence current mutual inductor 1; the input of the output termination residual current sudden change amount split circuit 3 of residual current amplifying circuit 2; the output of residual current sudden change amount split circuit 3 connects the input of residual current sudden change amount A/D change-over circuit 4; the input of the output termination analysis and judgement circuit 6 of residual current sudden change amount A/D change-over circuit 4; the control input end of analysis and judgement circuit 6 output termination dropout actuators 8 is with the output of control three-phase alternating-current supply; the output of the input termination residual current amplifying circuit 2 of gradual residual current testing circuit 5; another input of the output termination analysis and judgement circuit 6 of gradual residual current testing circuit 5; power circuit 7 provides the working power of each circuit and provides analysis and judgement circuit 6 required AC power time-base signal; it is characterized in that the electric capacity that the residual current memory separates with the sudden change amount in the residual current sudden change amount split circuit 3 is same electric capacity; residual current sudden change amount A/D change-over circuit 4 is made of the D/A change-over circuit and the level comparison circuit of bipolar voltage output; bipolarity D/A change-over circuit is made of the resistor network that the in-phase end and the end of oppisite phase of operational amplifier and operational amplifier all is connected to; analysis and judgement circuit 6 control residual current sudden change amount split circuit 3 sampling residual currents also compare the residual electricity flow valuve in the sinusoidal ac identical moment of angular frequency and calculate the residual current variable quantity, also following action are selected:
(1) when the residual current that change to increase half cycle be bells or the residual current amplitude that changes to increase in 3 cycles one by one cycle rise and when reaching rated value, judge that changing the residual current that increases is the animal's electric shock electric current.
(2) reach output animal's electric shock signal when giving the value of putting in the amplitude of animal's electric shock electric current and duration.
(3) when not having the animal's electric shock current characteristic, the residual current that changes increase is judged as electric wiring, equipment electric leakage.
(4) reach in amplitude that suddenly changes the leakage current that increases and duration and give when putting the specified operating value of sudden change the output mutation execution signal of threading off.
(5) reach to give in amplitude that slowly changes the leakage current that increases and duration and export gradual dropout execution signal when putting gradual specified operating value.
Accompanying drawing 7 is electrical schematic diagrams of present embodiment, and details are as follows for its operation principle:
The residual current of zero sequence current mutual inductor 1 output amplifies through signal amplification circuit 2, one of residual current sudden change amount split circuit 3 selects multiway analog switch IC3 under the microprocessor IC7 of analysis and judgement circuit 6 control, 30 ° of the relative sinusoidal ac angular frequencies of residual current, 90 °, 150 °, 210 °, 270 °, 330 ° of moment connect the capacitor C 1-C6 of residual current amplifying circuit 2 outputs with residual current sudden change amount split circuit 3 successively, C1-C6 and resistance R 6 constitute differential circuit, to separate the sudden change amount of residual current, C1-C6 also remembers residual current simultaneously 30 ° of sinusoidal ac angular frequencies, 90 °, 150 °, 210 °, 270 °, the value in 330 ° of moment.4 pairs of isolated residual current sudden change amounts of the sudden change amount A/D change-over circuit of residual current are carried out analog-to-digital conversion, the data that microprocessor IC7 sends here A/D change-over circuit 4 are stored and computing, and compare and calculate the residual current variable quantity with preceding cycle sinusoidal ac angular frequency residual electricity flow valuve of the identical moment, change at residual current, the residual current that change to increase half cycle be bells or the residual current amplitude that changes to increase in 3 cycles one by one cycle rise and when reaching rated value, microprocessor IC7 output animal's electric shock signal notice dropout actuator 8 cuts off AC power output.Microprocessor IC7 not only judges animal's electric shock signal in the residual current, still judges and handles to the electric wiring that increases suddenly in the residual current, equipment electric leakage with to electric wiring, the equipment electric leakage of slow increase.Power circuit 7 provides the dc supply of each circuit and provides analysis and judgement circuit 6 required AC power time-base signal.
Residual current sudden change amount split circuit 3 selects the analog switch IC3 of multichannel, residual current memory to constitute with sudden change amount separate capacitor C1-C6 and resistance R 6 by one, the electric capacity that the residual current memory separates with the sudden change amount is same electric capacity, and residual current sudden change amount A/D change-over circuit 4 constitutes bipolarity A/D change-over circuit by bipolar voltage output D/A change-over circuit and level comparison circuit IC5.Bipolar voltage output D/A change-over circuit is made of operational amplifier IC6 and the resistor network R12-R19 that IC6 in-phase end and end of oppisite phase all are connected to, with under the control of microprocessor IC7, export+,-voltage of polarity.Certainly, the residual current sudden change amount A/D change-over circuit 4 of apparatus of the present invention also can be made of the mould/transformation of variables circuit of other types.The resistance R 8-R9 of operational amplifier IC4 and its end of oppisite phase constitutes gradual residual current testing circuit, and output signal is to analysis and judgement circuit 6 when residual current meets or exceeds gradual residual current acting rated value.
6 pairs of animal's electric shock signals of the analysis and judgement circuit of present embodiment are judged, the flow process of handling procedure is seen accompanying drawing 9, electric wiring equipment electric leakage signal to unexpected increase is judged, the flow process of handling procedure is seen accompanying drawing 10, and the electric wiring equipment electric leakage signal judgement of slow increase, the flow process of handling procedure are seen accompanying drawing 11.
Embodiment 2:
The structured flowchart of present embodiment and electrical schematic diagram are seen accompanying drawing 6, accompanying drawing 8, and details are as follows for its circuit structure and operation principle:
The present embodiment device is by zero sequence current mutual inductor 1; residual current amplifying circuit 2; A/D change-over circuit 9; analysis and judgement circuit 6; power circuit 7 constitutes; A/D change-over circuit 9 is made of analog/digital conversion circuit; analysis and judgement circuit 6 is made of microprocessor; the device that separates animal's electric shock signal in the residual current is after increasing dropout actuator 8; promptly be combined into RCD; annexation is between it: three-phase alternating-current supply meets O; A; B; the C terminal; the three-phase and four-line lead is equidirectional to pass zero sequence current mutual inductor 1 after dropout actuator 8 to load-side O '; A '; B '; C ' terminal; the input of the secondary side joint residual current amplifying circuit 2 of zero sequence current mutual inductor 1; the input of the output termination A/D change-over circuit 9 of residual current amplifying circuit 2; the input of the output termination analysis and judgement circuit 6 of A/D change-over circuit 9; the control input end of analysis and judgement circuit 6 output termination dropout actuators 8 is with the output of control three-phase alternating-current supply, and power circuit 7 provides the working power of each circuit and provides analysis and judgement circuit 6 required AC power time-base signal.
Present embodiment and embodiment 1 different piece are to have cancelled residual current sudden change amount split circuit 3 and residual current sudden change amount A/D change-over circuit 4 and gradual residual current testing circuit 5, have increased residual current A/D change-over circuit 9.Because not pre-separation residual current sudden change amount before the sampling, the residual current that residual current A/D change-over circuit 9 must the conversion gamuts, thereby need to adopt the more A/D change-over circuit of figure place, and the data processing amount of analysis and judgement circuit 6 need be bigger with memory span.But present embodiment can improve sampling frequency, describing residual current waveform more accurately, thereby further reduces the insensitive regional scope of the protection of RCD in actual motion.Present embodiment adopts software to finish some hardware task, has simplified circuit structure and has reduced hardware quantity.
The analysis and judgement circuit 6 controlled sampling residual currents of present embodiment and one by one cycle relatively the sinusoidal ac identical moment of angular frequency the residual electricity flow valuve and calculate the residual current variable quantity, also following action is selected:
(1) when the residual current that change to increase half cycle be bells or the residual current amplitude that changes to increase in 3 cycles one by one cycle rise and when reaching rated value, judge that changing the residual current that increases is the animal's electric shock electric current;
(2) reach output animal's electric shock signal when giving the value of putting in the amplitude of animal's electric shock electric current and duration;
(3) when not having the animal's electric shock current characteristic, the residual current that changes increase is judged as electric wiring, equipment electric leakage;
(4) reach in amplitude that suddenly changes the leakage current that increases and duration and give when putting the specified operating value of sudden change the output mutation execution signal of threading off;
(5) reach to give in amplitude that slowly changes the leakage current that increases and duration and export gradual dropout execution signal when putting gradual specified operating value.
6 pairs of animal's electric shock signals of present embodiment analysis and judgement circuit are judged, the flow process of handling procedure is seen accompanying drawing 12, electric wiring equipment electric leakage signal to unexpected increase is judged, the flow process of handling procedure is seen accompanying drawing 13, and the electric wiring equipment electric leakage signal judgement of slow increase, the flow process of handling procedure are seen accompanying drawing 14.Use the microprocessor of band A/D change-over circuit if be pointed out that analysis and judgement circuit 6, A/D change-over circuit 9 can be cancelled in accompanying drawing 6, the accompanying drawing 8.
The animal's electric shock desired action current span of the RCD of application apparatus of the present invention is between the 15-40 milliampere; sudden change desired action current span is between the 50-100 milliampere; gradual desired action current span is between the 200-500 milliampere, and above-mentioned current values can be adjusted according to the application scenario and the object of protection of RCD.
The present invention separates animal's electric shock in the residual current with the method for differentiating specific waveforms and variable quantity Signal and electric wiring, equipment sudden change electric leakage and gradual electric leakage signal are with a whole set of complete side Method is with relevant device and adopted microprocessor, can be combined into easily the multichannel treatment system The functions such as duty indication with increase exchanges electric weight demonstration, device. Apparatus of the present invention are with existing Have technology to compare, it is big to have a safety protection range, and the few advantage of inessential dropout action improves Power supply quality with reduced power supply management person's non-productive work amount, also further improved simultaneously The RCD operational percentage.
Claims (5)
1. the method for a separating animal's electric shock signal, separation process is that the A/D change-over circuit converts residual current or residual current variable quantity digital quantity to and send the analysis and judgement circuit, the variation of analysis and judgement circuit analysis residual current also judges, it is characterized in that differentiating residual current specific waveforms and residual current variable quantity, and take the following step:
(1) sampling residual electricity flow valuve;
(2) cycle compares the residual electricity flow valuve in the sinusoidal ac identical moment of angular frequency one by one;
(3) calculate the residual current variable quantity;
(4) when half cycle of residual current that change to increase be bells or change the residual current amplitude that increases in 3 cycles one by one cycle rise and when reaching rated value, judge that changing the residual current that increases is the animal's electric shock electric current;
(5) reach output animal's electric shock signal when giving the value of putting when the amplitude of animal's electric shock electric current and duration.
2. according to the method for the described separating animal's electric shock signal of claim 1., the minimum sampling frequency that it is characterized in that said sampling residual electricity flow valuve is each cycle of sinusoidal ac 6 times, and the optimal sampling time is 30 °, 90 °, 150 °, 210 °, 270 °, 330 ° moment of the relative sinusoidal ac angular frequency of residual current during each cycle sampling 6 times.
3. the device of a separating animal's electric shock signal; by zero sequence current mutual inductor (1); residual current amplifying circuit (2); residual current sudden change amount split circuit (3); residual current sudden change amount A/D change-over circuit (4); gradual residual current testing circuit (5); analysis and judgement circuit (6); power circuit (7) constitutes; analysis and judgement circuit (6) is made of microprocessor; the device that separates animal's electric shock signal in the residual current is after increasing dropout actuator (8); promptly be combined into RCD; annexation is between it: three-phase alternating-current supply meets (O); (A); (B); (C) terminal; the three-phase and four-line lead is equidirectional pass zero sequence current mutual inductor (1) after dropout actuator (8) to load-side (O '); (A '); (B '); (C ') terminal; the input of the secondary side joint residual current amplifying circuit (2) of zero sequence current mutual inductor (1); the input of the output termination residual current sudden change amount split circuit (3) of residual current amplifying circuit (2); the output of residual current sudden change amount split circuit (3) connects the input of residual current sudden change amount A/D change-over circuit (4); the input of the output termination analysis and judgement circuit (6) of residual current sudden change amount A/D change-over circuit (4); the control input end of analysis and judgement circuit (6) output termination dropout actuator (8) is with the output of control three-phase alternating-current supply; the output of the input termination residual current amplifying circuit (2) of gradual residual current testing circuit (5); another input of the output termination analysis and judgement circuit (6) of gradual residual current testing circuit (5); power circuit (7) provides the working power of each circuit and provides analysis and judgement circuit (6) required AC power time-base signal; it is characterized in that the electric capacity that the residual current memory separates with the sudden change amount in the residual current sudden change amount split circuit (3) is same electric capacity; residual current sudden change amount A/D change-over circuit (4) is made of the D/A change-over circuit and the level comparison circuit of bipolar voltage output; bipolarity D/A change-over circuit is made of the resistor network that the in-phase end and the end of oppisite phase of operational amplifier and operational amplifier all is connected to; analysis and judgement circuit (6) control residual current sudden change amount split circuit (3) sampling residual current also compares the residual electricity flow valuve in the sinusoidal ac identical moment of angular frequency and calculates the residual current variable quantity, also following action is selected:
(1) when the residual current that change to increase half cycle be bells or the residual current amplitude that changes to increase in 3 cycles one by one cycle rise and when reaching rated value, judge that changing the residual current that increases is the animal's electric shock electric current;
(2) reach output animal's electric shock signal when giving the value of putting in the amplitude of animal's electric shock electric current and duration;
(3) when not having the animal's electric shock current characteristic, the residual current that changes increase is judged as electric wiring, equipment electric leakage;
(4) reach in amplitude that suddenly changes the leakage current that increases and duration and give when putting the specified operating value of sudden change the output mutation execution signal of threading off;
(5) reach to give in amplitude that slowly changes the leakage current that increases and duration and export gradual dropout execution signal when putting gradual specified operating value.
4. according to the described device of claim 3., it is characterized in that said residual current sudden change amount split circuit (3) selects the analog switch of multichannel, residual current memory to constitute with sudden change amount separate capacitor and resistance by one.
5. the device of a separating animal's electric shock signal; by zero sequence current mutual inductor (1); residual current amplifying circuit (2); A/D change-over circuit (9); analysis and judgement circuit (6); power circuit (7) constitutes; A/D change-over circuit (9) is made of analog/digital conversion circuit; analysis and judgement circuit (6) is made of microprocessor; the device that separates animal's electric shock signal in the residual current is after increasing dropout actuator (8); promptly be combined into RCD; annexation is between it: three-phase alternating-current supply meets (O); (A); (B); (C) terminal; the three-phase and four-line lead is equidirectional pass zero sequence current mutual inductor (1) after dropout actuator (8) to load-side (O '); (A '); (B '); (C ') terminal; the input of the secondary side joint residual current amplifying circuit (2) of zero sequence current mutual inductor (1); the input of the output termination A/D change-over circuit (9) of residual current amplifying circuit (2); the input of the output termination analysis and judgement circuit (6) of A/D change-over circuit (9); the control input end of analysis and judgement circuit (6) output termination dropout actuator (8) is with the output of control three-phase alternating-current supply; power circuit (7) provides the working power of each circuit and provides analysis and judgement circuit (6) required AC power time-base signal; it is characterized in that analysis and judgement circuit (6) controlled sampling residual current and one by one cycle relatively the sinusoidal ac identical moment of angular frequency the residual electricity flow valuve and calculate the residual current variable quantity, also following action is selected:
(1) when the residual current that change to increase half cycle be bells or the residual current amplitude that changes to increase in 3 cycles one by one cycle rise and when reaching rated value, judge that changing the residual current that increases is the animal's electric shock electric current;
(2) reach output animal's electric shock signal when giving the value of putting in the amplitude of animal's electric shock electric current and duration;
(3) when not having the animal's electric shock current characteristic, the residual current that changes increase is judged as electric wiring, equipment electric leakage;
(4) reach in amplitude that suddenly changes the leakage current that increases and duration and give when putting the specified operating value of sudden change the output mutation execution signal of threading off;
(5) reach to give in amplitude that slowly changes the leakage current that increases and duration and export gradual dropout execution signal when putting gradual specified operating value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99106844A CN1079601C (en) | 1999-05-16 | 1999-05-16 | Method and device for separating animal's electric shock signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99106844A CN1079601C (en) | 1999-05-16 | 1999-05-16 | Method and device for separating animal's electric shock signal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1236212A CN1236212A (en) | 1999-11-24 |
| CN1079601C true CN1079601C (en) | 2002-02-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99106844A Expired - Fee Related CN1079601C (en) | 1999-05-16 | 1999-05-16 | Method and device for separating animal's electric shock signal |
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| Country | Link |
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| CN (1) | CN1079601C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100435443C (en) * | 2004-09-02 | 2008-11-19 | 薛小平 | Intelligent leakage protector |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101958528B (en) * | 2010-10-18 | 2013-07-03 | 吕纪文 | Leakage protection method and device |
| CN102097780B (en) * | 2011-01-31 | 2014-08-06 | 赵长城 | Electric shock and electric leakage protection device for low voltage power grid |
| CN102684141B (en) * | 2012-04-28 | 2015-05-20 | 中国农业大学 | Shock current identifying method and aftercurrent protecting device |
| CN107276029B (en) * | 2017-06-20 | 2019-04-16 | 安徽南瑞继远电网技术有限公司 | Anti- personal electrical shock circuit breaker control method and system based on Waveform Identification Technology |
| CN109347061A (en) * | 2018-11-23 | 2019-02-15 | 深圳市晶扬电子有限公司 | Detection of electrical leakage IC chip, leakage current detection protection circuit and electrical equipment |
| CN112865013B (en) * | 2020-03-30 | 2023-05-26 | 深圳友讯达科技股份有限公司 | Protection device based on residual current characteristic analysis |
| CN116845822B (en) * | 2023-07-11 | 2024-01-26 | 北京达三江电器设备厂 | Anti-interference intelligent residual current action protector system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86105323A (en) * | 1986-08-29 | 1987-12-09 | 陈策沾 | Full-automatic electric shock safety equipment |
-
1999
- 1999-05-16 CN CN99106844A patent/CN1079601C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86105323A (en) * | 1986-08-29 | 1987-12-09 | 陈策沾 | Full-automatic electric shock safety equipment |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100435443C (en) * | 2004-09-02 | 2008-11-19 | 薛小平 | Intelligent leakage protector |
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| Publication number | Publication date |
|---|---|
| CN1236212A (en) | 1999-11-24 |
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