CN204967234U - Multi -functional residual current operated circuit breaker circuit - Google Patents
Multi -functional residual current operated circuit breaker circuit Download PDFInfo
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- CN204967234U CN204967234U CN201520643496.4U CN201520643496U CN204967234U CN 204967234 U CN204967234 U CN 204967234U CN 201520643496 U CN201520643496 U CN 201520643496U CN 204967234 U CN204967234 U CN 204967234U
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Abstract
Multi -functional residual current operated circuit breaker circuit including power supply circuit, electric leakage signal acquisition control circuit, trip circuit and earth -leakage detection circuit, still includes excessive pressure action circuit, and excessive pressure action circuit includes stabilivolt D2, direct current voltage signal input and control signal output, and power supply circuit includes half -wave rectifier circuit and reduction voltage circuit with main circuit connection, excessive pressure action circuit and half -wave rectifier circuit are connected and connect with the signal acquisition control circuit's that leak electricity NULL, when the direct current voltage signal that receives when direct current voltage signal input exceedes the stabilivolt D2's of settlement limit value, move through NULL's the trip circuit execution dropout that triggers, electric leakage signal acquisition control circuit still monitors the residual current of main circuit respectively with reduction voltage circuit and main circuit connection, NULL controls when the residual current appearance is unusual the trip circuit action of carry out threading off. Can realize electric leakage, the multiple protect function of overvoltage simultaneously under limited volume.
Description
Technical field
The utility model belongs to Low Voltage Electrical Apparatus, relates to a kind of residual current action breaker with overcurrent protection, particularly relates to a kind of circuit of the multifunction residual current action breaker with overcurrent protection and overvoltage protection.
Background technology
Current client is in the process using residual current action breaker, and circuit breaker input power is usually because electrical network is unstable or there is the situation missed because of wiring error and 380V voltage is applied to overvoltage of power supply that circuit causes and burnt by circuit breaker lower end load equipment.Circuit breaker in the market, only with aftercurrent action protecting, was not with compression functions, or was not only with aftercurrent action protecting with over-voltage protection function, greatly affected the reliability of client to product and the primary demand of fail safe.In addition, existing similar circuit breaker generally adopts the form of full-wave rectification, resistance-capacitance depressurization or resistance step-down, and the voltage after full-wave rectification is high, and full-wave rectifying circuit adopts 4 rectifier diodes, to the cost of electric sub-member plate and miniaturization unfavorable.In addition, the operationally temperature rise of resistance reduction voltage circuit, easily lost efficacy under the high temperature conditions, damaged, and affected reliability and element useful life of circuit working.Although temperature rise is low during capacitance-resistance voltage reduction circuit work, but the ability of the higher high temperature resistant environment of cost, moreover, existing similar circuit breaker is not exclusively used in the circuit absorbing surge voltage, therefore generally can not bear 4KV surge impact, the reliability of user to product and the primary demand of fail safe can not be met.
Utility model content
In order to overcome the defect of prior art, the purpose of this utility model is to provide a kind of multifunction residual current action breaker circuit that simultaneously can realize electric leakage, overvoltage multi-protective function under limited volume.
For achieving the above object, the utility model have employed following technical scheme:
A kind of multifunction residual current action breaker circuit, comprise power circuit, electric leakage signal acquisition control circuit, trip circuit and leakage tests circuit, also comprise overvoltage actuating circuit, described overvoltage actuating circuit comprises voltage-stabiliser tube D2, d. c. voltage signal input and control signal output, and described power circuit comprises the half-wave rectifying circuit be connected with main circuit and the reduction voltage circuit be connected with half-wave rectifying circuit; The d. c. voltage signal input of overvoltage actuating circuit is connected with a direct current output node of half-wave rectifying circuit outlet side, control signal output is connected with the integrated chip of described electric leakage signal acquisition control circuit, when the d. c. voltage signal that the d. c. voltage signal input having served as pressure actuating circuit receives exceedes the limit value of voltage-stabiliser tube D2 of setting, described overvoltage actuating circuit exports control signal and performs trip action by the trip circuit described in triggering of integrated chip; Described electric leakage signal acquisition control circuit is also connected the residual current of monitoring main circuit with the direct current output node of reduction voltage circuit and main circuit respectively, and the trip circuit described in described integrated chip controls when residual current occurs abnormal performs trip action.
Preferably, described overvoltage actuating circuit also comprises for resistance R13, the resistance R14 of dividing potential drop and the electric capacity C9 for filtering; One end of resistance R13 is connected with half-wave rectifying circuit, as the d. c. voltage signal input of described overvoltage actuating circuit, the other end of resistance R13 is connected with one end of resistance R14 parallel branch with electric capacity C9, the other end ground connection of electric capacity C9 and resistance R14 parallel branch, the negative pole of voltage-stabiliser tube D2 is connected with resistance R13, and the positive pole of voltage-stabiliser tube D2 is used as the control signal output of described overvoltage actuating circuit.
Preferably, the described positive pole of voltage-stabiliser tube D2 being used as the control signal output of overvoltage actuating circuit is connected with the 4th pin 4 of integrated chip; Or be connected in parallel with the 4th pin 4 of integrated chip and the 5th pin 5.
Preferably, described power circuit also comprises surge absorbing circuit, wherein half-wave rectifying circuit comprises a rectifier diode VD1, its one end is connected with the A pole of the controllable silicon VT1 of trip circuit, and the other end is with tripping coil KA one end of trip circuit or be connected with one end of the piezo-resistance RV1 of surge absorbing circuit.
Preferably, the paster type resistor module that the reduction voltage circuit of described power circuit comprises electric capacity C8 and combined by multiple Chip-R; One end of paster type resistor module is connected with the negative pole of the diode VD1 of half-wave rectifying circuit, and is connected in parallel with the A pole of the d. c. voltage signal input of overvoltage actuating circuit, the controllable silicon VT1 of trip circuit; The other end and one end of electric capacity C8 of paster type resistor module connect and compose another direct current output node be connected with the integrated chip of electric leakage signal acquisition control circuit, the other end ground connection of electric capacity C8.
Preferably, described paster type resistor module is formed by multiple Chip-R tandem compound; Or described paster type resistor module is formed by least two series patch resistor group parallel combinations, and wherein each series patch resistor group is formed by multiple Chip-R tandem compound; Or described paster type resistor module is formed by least two Chip-R group tandem compounds in parallel, and wherein each Chip-R group in parallel is formed by multiple Chip-R parallel combination.
Preferably, described electric leakage signal acquisition control circuit comprises integrated chip, zero-sequence transformer TA, bidirectional diode D1, debugging resistance R1, resistance R2, resistance R3, electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4, electric capacity C5, electric capacity C6 and electric capacity C7; Debugging resistance R1, bidirectional diode D1, electric capacity C1 are connected in the two ends of the secondary circuit lead-in wire of zero-sequence transformer TA successively in parallel; One end of resistance R2 is connected with one end of electric capacity C1, and the other end of resistance R2 and one end of electric capacity C2, one end of electric capacity C3 and the first pin one of integrated chip are connected in parallel; One end of resistance R3 is connected with the other end of electric capacity C1, and the other end of resistance R3 is connected with the other end of electric capacity C2, one end of electric capacity C4 and the second pin two of integrated chip are connected in parallel; The other end of electric capacity C3 and the other end of electric capacity C4, the three-prong 3 of integrated chip be connected ground; 4th pin 4 of integrated chip and the positive pole of voltage-stabiliser tube D2 of the 5th pin 5 and overvoltage actuating circuit, one end of electric capacity C5 are connected in parallel, the other end ground connection of electric capacity C5; 6th pin 6 of integrated chip is connected with one end of electric capacity C6,7th pin 7 of integrated chip is connected in parallel with the G pole of the other end of electric capacity C6, one end of electric capacity C7, the controllable silicon VT1 of trip circuit, the other end ground connection of electric capacity C7, the 8th pin 8 of integrated chip is connected with another direct current output node of power circuit.
Preferably, described trip circuit comprises tripping coil KA and controllable silicon VT1, one end of tripping coil KA is connected in parallel with one end of the piezo-resistance RV1 of surge absorbing circuit, the live wire L exchanging input side of power circuit, and the other end of tripping coil KA is connected with the positive pole of the diode VD1 of half-wave rectifying circuit.
Preferably, described trip circuit comprises tripping coil KA and controllable silicon VT1, described one end of tripping coil KA is connected with the neutral line N parallel of the other end of the piezo-resistance RV1 of surge absorbing circuit, the interchange input side of power circuit, and the K pole of the other end of tripping coil KA and the controllable silicon VT1 of trip circuit, the other end of the electric capacity C9 of overvoltage actuating circuit and the other end of resistance R14 are connected in parallel.
Preferably, one end of the piezo-resistance RV1 of the surge absorbing circuit of described power circuit is connected in parallel with the live wire L exchanging input side with the diode VD1 of half-wave rectifying circuit, and the other end of piezo-resistance RV1 is connected with the neutral line N of power circuit.
The beneficial effect of multifunction residual current action breaker circuit of the present utility model is: by adopting power circuit, overvoltage actuating circuit, electric leakage signal acquisition control circuit, trip circuit, leakage tests circuit, and power circuit adopts half-wave rectifying circuit, the modular reduction voltage circuit of paster type resistor and the structure by surge absorbing circuit, the basis of the former creepage protection function of this type of circuit breaker adds the several functions such as overvoltage dropout protection and antisurge, under limited volume, effectively can not only reduce the volume of circuit and simplify the structure of optimized circuit, and significantly can also reduce pressure drop and the temperature rise of reduction voltage circuit simultaneously, the reliability and security of effective improving product while rationally reducing production cost.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of multifunction residual current action breaker circuit of the present utility model.
Fig. 2 is the electrical block diagram of the first connected mode of the first execution mode of the paster type resistor module of the reduction voltage circuit of multifunction residual current action breaker circuit of the present utility model.
Fig. 3 is the electrical block diagram of the second connected mode of the first execution mode of the paster type resistor module of the reduction voltage circuit of multifunction residual current action breaker circuit of the present utility model.
Fig. 4 is the electrical block diagram of the second execution mode of the paster type resistor module of the reduction voltage circuit of multifunction residual current action breaker circuit of the present utility model.
Fig. 5 is the electrical block diagram of the third execution mode of the paster type resistor module of the reduction voltage circuit of multifunction residual current action breaker circuit of the present utility model.
Embodiment
Below in conjunction with the embodiment that accompanying drawing 1 to 5 provides, further illustrate the embodiment of multifunction residual current action breaker circuit of the present utility model.
See Fig. 1, multifunction residual current action breaker circuit of the present utility model, the power circuit comprising electric leakage signal acquisition control circuit, trip circuit, leakage tests circuit and be made up of surge absorbing circuit, half-wave rectifying circuit and reduction voltage circuit.Electric leakage signal acquisition control circuit is for monitoring main circuit L-L1, and whether N-N1 occurs residual current, and controls trip circuit execution trip action when there is residual current; Trip circuit produces trip action for driving tripping coil KA (performer), and it is by the control of electric leakage signal acquisition control circuit; Whether leakage tests circuit is for generation of simulation residual current, effective with the trip action detecting residual current action breaker; Power circuit is from main circuit L-L1, N-N1 gets alternating current, that is: the live wire L of the interchange input side of power circuit meets the live wire phase L-L1 of main circuit, the neutral line N of the interchange input side of power circuit meets the neutral line phase N-N1 of main circuit, the positive pole of the DC output side of power circuit provides direct voltage to electric leakage signal acquisition control circuit, trip circuit, and connect to neutral N in the earth polar (being also the common ground pole of multifunction residual current action breaker circuit) of the DC output side of power circuit.Power circuit of the present utility model also has surge protection function, and it is realized by surge absorbing circuit.A beneficial features of the present utility model also comprises overvoltage actuating circuit, makes residual current action breaker product on the basis of original leakage current protection function, add over-voltage protection function.Consider that the live wire L of the interchange input side of power circuit and neutral line N are connected with the live wire phase L-L1 of main circuit and neutral line phase N-N1 respectively, therefore, when surge absorbing circuit does not absorb surge voltage, the direct voltage of the outlet side of power circuit is relevant relative to the alternating voltage (alternating voltage namely between the live wire phase L-L1 of main circuit and neutral line phase N-N1) of neutral line N to live wire L, in other words, the d. c. voltage signal (signal of voltage fluctuation) of power circuit outlet side is the AC voltage fluctuations degree that can occur between live wire phase L-L1 and the neutral line phase N-N1 of accurate response main circuit.The utility model utilizes this d. c. voltage signal and the original integrated chip of electric leakage signal acquisition control circuit exactly, realizes overvoltage dropout protecting control.Specifically, multifunction residual current action breaker circuit of the present utility model also comprises overvoltage actuating circuit, described overvoltage actuating circuit comprises voltage-stabiliser tube D2, d. c. voltage signal input and control signal output, this d. c. voltage signal input is connected with a direct current output node of described power circuit outlet side, the control signal output of described overvoltage actuating circuit is connected with the 4th pin 4 of the integrated chip of described electric leakage signal acquisition control circuit (equivalent structure of this connection is that the 4th pin 4 of integrated chip as shown in Figures 2 and 3 and the 5th pin 5 are connected in parallel), by the d. c. voltage signal of integrated chip monitoring from the AC voltage fluctuations degree between live wire phase L-L1 and neutral line phase N-N1 of the reflection main circuit of power circuit, this signal can reflect whether main circuit exists overvoltage, when the d. c. voltage signal that the d. c. voltage signal input having served as pressure actuating circuit receives exceedes the limit value of voltage-stabiliser tube D2 of setting, described overvoltage actuating circuit exports control signal and performs trip action by the trip circuit described in triggering of integrated chip.
The structure of concrete overvoltage actuating circuit can have multiple, a kind of preferred structure as shown in Figures 2 and 3: described overvoltage actuating circuit also comprises for resistance R13, the resistance R14 of dividing potential drop and the electric capacity C9 for filtering; One end of resistance R13 is connected with half-wave rectifying circuit, namely the one end be connected with a direct current output node of described power circuit and the negative pole of rectifier diode VD1 connect, as the d. c. voltage signal input of described overvoltage actuating circuit, the other end of resistance R13 is connected with one end of resistance R14 parallel branch with electric capacity C9, the other end ground connection of electric capacity C9 and resistance R14 parallel branch, the negative pole of voltage-stabiliser tube D2 is connected with resistance R13, and the positive pole of voltage-stabiliser tube D2 is used as the control signal output of described overvoltage actuating circuit.In other words, the other end of resistance R13 and one end of electric capacity C9, one end of resistance R14 and the negative pole of voltage-stabiliser tube D2 are connected in parallel, the other end of electric capacity C9 with the other end of resistance R14 and be connected ground; The positive pole of voltage-stabiliser tube D2 is connected with the 4th pin 4 of integrated chip.Should understand, the preferred embodiment structure of the overvoltage actuating circuit of the present utility model shown in Fig. 2 and Fig. 3, its overvoltage action is the reverse withstand voltage based on voltage-stabiliser tube D2, therefore, the reverse withstand voltage of voltage-stabiliser tube D2 must match with the limit value of described d. c. voltage signal, and this coupling is realized by modulated resistance R13 and resistance R14; The limit value of described d. c. voltage signal sets according to the AC voltage threshold of overvoltage protection, and the AC voltage threshold of setting must be less than the sense voltage of the piezo-resistance RV1 of surge absorbing circuit.The dropout control circuit comprising integrated chip and trip circuit of prior art, electric leakage dropout protection can only be realized, overvoltage dropout protection can not be realized simultaneously, and the utility model utilizes same integrated chip collection, process electric leakage signal and overvoltage signal, and same trip circuit execution trip action is all controlled when residual current and/or overvoltage occur abnormal, achieve and add dropout defencive function under the prerequisite not increasing dropout control circuit, and utilize the voltage signal of the direct current output node in power circuit as the overvoltage signal of monitoring main circuit, enormously simplify the structure of the circuit gathering overvoltage signal.In addition; often complex structure, volume are very large for the overvoltage signal Acquisition Circuit of prior art; and small and exquisite overvoltage actuating circuit of the present utility model can be pressed in the inner space of existing product completely; efficiently solve expansion safety protection function, promote reliability and safety, and Miniaturization Design, reduce contradiction between manufacturing cost.
Described power circuit comprises half-wave rectifying circuit, reduction voltage circuit and surge absorbing circuit, and another beneficial features of the present utility model is that power circuit have employed half-wave rectifying circuit, that is: the half-wave rectifying circuit of described power circuit comprises diode VD1; The positive pole of diode VD1 is connected with the live wire L of the interchange input side of power circuit, the negative pole of diode VD1 is as a direct current output node of power circuit, this node, for connecting the d. c. voltage signal input of overvoltage actuating circuit, is also connected in parallel with the A pole (anode) of one end of paster type resistor group, the controllable silicon VT1 of trip circuit simultaneously.Adopt the half-wave rectifying circuit of diode VD1, its advantage is that structure is simple, VD is low (being about 0.45 times of AC-input voltage), therefore the step-down burden of reduction voltage circuit can greatly be reduced, possibility is realized for reduction voltage circuit adopts paster type resistor module to provide, particularly half-wave rectifying circuit adopts diode VD1 and reduction voltage circuit to adopt the textural association of paster type resistor module, effectively can not only reduce temperature rise, and very favourable to the miniaturization of circuit, can the effectively reliability of improving product, the grade of fail safe.
Another beneficial features of the present utility model is, power circuit not only has the direct current output node of power supply, but also there is the direct current output node of a protection of threading off for overvoltage, its concrete structure as shown in Figures 2 and 3: the paster type resistor module that the reduction voltage circuit of described power circuit comprises electric capacity C8 and combined by multiple Chip-R; The negative pole of one end of paster type resistor module and the diode VD1 of half-wave rectifying circuit connects and composes a direct current output node, and the A pole of the d. c. voltage signal input of this direct current output node and overvoltage actuating circuit, the controllable silicon VT1 of trip circuit is connected in parallel; The other end of paster type resistor module and one end of electric capacity C8 connect and compose another direct current output node, and this direct current output node is connected (namely for providing direct voltage to integrated chip) with the 8th pin 8 of the integrated chip of electric leakage signal acquisition control circuit; The other end ground connection of electric capacity C8.Another beneficial features of the present utility model is, reduction voltage circuit have employed the paster type resistor module combined by multiple Chip-R, and its advantage is: voltage and the temperature rise that can reduce each Chip-R at double; Particularly with connection in series-parallel (after first series connection as shown in Figure 2 more in parallel) or and the resistive module that combines of the mode of connecting (connecting again after first parallel connection as shown in Figure 5), can also avoid because one of them resistance failure causes product to be failure to actuate, thus improve the reliability and security of product.
The concrete structure of paster type resistor module can have various ways.First kind of way as shown in Figures 2 and 3, the paster type resistor module of described reduction voltage circuit is first connected by 8 Chip-Rs (R5 to R12) again and in parallelly to be formed, concrete compound mode is: by Chip-R R5, Chip-R R6, Chip-R R7 and Chip-R R8 the first series resistance in series, by Chip-R R9, Chip-R R10, Chip-R R11 and Chip-R R12 the second series resistance in series, the first series resistance and the second series resistance are connected in parallel and form series and parallel compensated resistance module.The second way as shown in Figure 4, the paster type resistor module of described reduction voltage circuit comprises 8 Chip-Rs (R5 to R12), concrete compound mode is: Chip-R R5, Chip-R R6, and Chip-R R7, Chip-R R8, Chip-R R9, Chip-R R10, Chip-R R11 and Chip-R R12 are connected in series and form pure series resistance module.The third mode is as shown in Figure 5: the paster type resistor module of described reduction voltage circuit is in series again by 8 first parallel connections of Chip-R (R5 to R12), concrete compound mode is: Chip-R R5 and Chip-R R6 parallel connection forms the first parallel resistance, Chip-R R7 and Chip-R R8 parallel connection forms the second parallel resistance, Chip-R R9 and Chip-R R10 parallel connection forms the 3rd parallel resistance, Chip-R R11 and Chip-R R12 parallel connection forms the 4th parallel resistance group (namely forming four pairs of parallel resistances in the mode of two two-phase strings), first parallel resistance, second parallel resistance, 3rd parallel resistance, 4th parallel resistance group is connected in series and is formed and go here and there resistive module (namely the four pairs of parallel resistances are connected in series and are formed and go here and there resistive module).Concrete structure three kinds of optimal ways of above-mentioned paster type resistor module can be summarized as follows: the paster type resistor module of the reduction voltage circuit of described power circuit comprises eight Chip-Rs (R5 to R12); Eight Chip-Rs (R5 to R12) are connected in series and form pure series resistance module; Or, four Chip-Rs (R5 to R8) in eight Chip-Rs (R5 to R12) are serially connected in the first series resistance, other four Chip-Rs (R9 to R12) are serially connected in the second series resistance, and the first series resistance and the second series resistance are connected in parallel and form series and parallel compensated resistance module; Or eight Chip-Rs (R5 to R12) form four pairs of parallel resistances in two two-phase strings (R5 and R6, R, 7 and R8, R9 and R10, R11 and R12) mode, the four pairs of parallel resistances are connected in series and are formed and go here and there resistive module.The best mode of preferred employing first kind of way, effectively can reduce temperature rise, and very favourable to the miniaturization of circuit.
The utility model also has a beneficial features to be have employed surge absoption loop, that is: the surge absorbing circuit of described power circuit comprises piezo-resistance RV1; One end of piezo-resistance RV1 is connected in parallel with the live wire L exchanging input side with the diode VD1 of the half-wave rectifying circuit of power circuit, and the other end of piezo-resistance RV1 is connected with the neutral line N of power circuit.Because live wire L, neutral line N are connected with live wire phase L-L1, the neutral line phase N-N1 of main circuit respectively; therefore the surge absoption function of piezo-resistance RV1 can not only protect multifunction residual current action breaker circuit, and can also the circuit in available protecting circuit breaker downstream.Due to the paster type resistor module that the utility model have employed surge absorbing circuit and matches with it, greatly strengthen the ability of bearing surge impact, the surge voltage of the 4KV that existing mill run can not bear can be born.Because the reduction voltage circuit of power circuit adopts paster type resistor modular structure; surge absorbing circuit adopts piezo-resistance RV1 structure; make residual current action breaker product on the basis with leakage current protection, over-voltage protection function; turn increase the function of resisting surge voltage; simultaneously; paster type resistor modular structure can reduce circuit volume again, promotes the reliability of circuit, reduces circuit temperature rise.
Described electric leakage signal acquisition control circuit comprises integrated chip, zero-sequence transformer TA, bidirectional diode D1, debugging resistance R1, resistance R2, resistance R3, electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4, electric capacity C5, electric capacity C6 and electric capacity C7; Debugging resistance R1, bidirectional diode D1, electric capacity C1 are connected in the two ends of the secondary circuit lead-in wire of zero-sequence transformer TA successively in parallel; One end of resistance R2 is connected with one end of electric capacity C1, and the other end of resistance R2 and one end of electric capacity C2, one end of electric capacity C3 and the first pin one of integrated chip are connected in parallel; One end of resistance R3 is connected with the other end of electric capacity C1, and the other end of resistance R3 is connected with the other end of electric capacity C2, one end of electric capacity C4 and the second pin two of integrated chip are connected in parallel; The other end of electric capacity C3 and the other end of electric capacity C4, the three-prong 3 of integrated chip be connected ground; 4th pin 4 of integrated chip and the positive pole of voltage-stabiliser tube D2 of the 5th pin 5 and overvoltage actuating circuit, one end of electric capacity C5 are connected in parallel, the other end ground connection of electric capacity C5; 6th pin 6 of integrated chip is connected with one end of electric capacity C6,7th pin 7 of integrated chip is connected in parallel with the G pole (control pole) of the other end of electric capacity C6, one end of electric capacity C7, the controllable silicon VT1 of trip circuit, the other end ground connection of electric capacity C7, the 8th pin 8 of integrated chip is connected with another direct current output node of power circuit.Described integrated chip adopts commercial electronic device, its 26S Proteasome Structure and Function is known, and beneficial features of the present utility model makes integrated chip define two control input ends, wherein: one is newly-increased overvoltage protection control input end, it is connected and composed by the 4th pin 4 of integrated chip and the 5th pin 5, and be connected in parallel with the d. c. voltage signal input (i.e. the positive pole of voltage-stabiliser tube D2) of overvoltage actuating circuit; Another is earth leakage protective control input end, and it is made up of the first pin one of integrated chip, and gathers residual current signal from zero-sequence transformer TA.
Described trip circuit comprises tripping coil KA and controllable silicon VT1; The G pole (control pole) of controllable silicon VT1 connects the 7th pin 7 of integrated chip, the A pole (anode) of controllable silicon VT1 is connected to form on/off control loop with the live wire L exchanging input side of power circuit with the neutral line N exchanging input side respectively with the K pole (negative electrode) of controllable silicon VT1, and tripping coil KA is connected in series in described on/off control loop.Described on/off control loop has turn-on and turn-off two states under the G pole of controllable silicon VT1 controls: at main circuit (L-L1, N-N1) under normal circumstances, electric leakage signal acquisition control circuit controls controllable silicon VT1 and turns off (making on/off control loop be in off state), and the electric current be connected in series in the tripping coil KA in on/off control loop can not encourage tripping coil to produce trip action; As main circuit (L-L1, when N-N1) there is residual current (leakage current), electric leakage signal acquisition control circuit controls controllable silicon VT1 conducting (triggering the conducting of on/off control loop), be connected in series in the increase of the electric current in the tripping coil KA in on/off control loop, so that excitation tripping coil produces trip action.
The concrete structure of described trip circuit can have various ways.A kind of preferred mode as shown in Figure 2, described trip circuit comprises tripping coil KA and controllable silicon VT1, one end of tripping coil KA is connected in parallel with one end of the piezo-resistance RV1 of surge absorbing circuit, the live wire L exchanging input side of power circuit, and the other end of tripping coil KA is connected with the positive pole of the diode VD1 of half-wave rectifying circuit.Another kind of preferred mode as shown in Figure 3, described trip circuit comprises tripping coil KA and controllable silicon VT1, described one end of tripping coil KA is connected with the neutral line N parallel of the other end of the piezo-resistance RV1 of surge absorbing circuit, the interchange input side of power circuit, and the K pole of the other end of tripping coil KA and the controllable silicon VT1 of trip circuit, the other end of the electric capacity C9 of overvoltage actuating circuit and the other end of resistance R14 are connected in parallel.
Described test loop comprises often opens Test Switchboard S1, resistance R4, often open Test Switchboard S1 and resistance R4 series connection and form loop, this loop is through being connected in parallel after zero-sequence transformer TA the live wire phase (L-L1) of main circuit with neutral line phase (N-N1).When people makes test loop conducting for pressing Test Switchboard S1; the electric current flow through in test loop can play the effect of simulation residual current; make induce residual current signal in the secondary circuit of zero-sequence transformer TA; this signal can trigger tripping coil KA and produce trip action, thus whether the dropout protection detecting circuit breaker is normal.
Below in conjunction with the embodiment that Fig. 1 to Fig. 3 provides, further illustrate the control procedure of dropout defencive function of the present utility model.
Overvoltage dropout protection process: supply voltage (exchanging the alternating voltage of input side) converts direct voltage (signal) to after half-wave rectifying circuit rectification, this direct voltage exports to overvoltage actuating circuit from a direct current output node of power circuit, overvoltage actuating circuit by this d. c. voltage signal through resistance R13 and resistance R14 dividing potential drop with electric capacity C9 filtering is after-applied gives voltage-stabiliser tube D2, when being applied to voltage-stabiliser tube D2 voltage and exceeding voltage-stabiliser tube D2 withstand voltage (namely described direct voltage exceedes limit value), voltage-stabiliser tube D2 conducting also exports high level to the 4th pin 4 of integrated chip and the 5th pin 5, the 7th pin 7 of integrated chip is made to export high level to the G pole of controllable silicon VT1, trigger the A pole (anode) of controllable silicon VT1 and K pole (negative electrode) conducting, tripping coil KA is caused to produce trip action.
Electric leakage dropout protection process: when residual current appears in main circuit; the secondary circuit of zero-sequence transformer TA can induce electric leakage signal; this electric leakage signal makes the pressure reduction between the first pin 1 of integrated chip and crus secunda 2 raise; the 7th pin 7 of integrated chip is made to export high level to the G pole of controllable silicon VT1 (control pole); trigger the A pole (anode) of controllable silicon VT1 and K pole (negative electrode) conducting, cause tripping coil KA to produce trip action.
Above content is in conjunction with concrete preferred implementation further detailed description of the utility model, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, without departing from the concept of the premise utility, some simple deduction or replace can also be made, all should be considered as belonging to protection range of the present utility model.
Claims (10)
1. a multifunction residual current action breaker circuit, comprise power circuit, electric leakage signal acquisition control circuit, trip circuit and leakage tests circuit, it is characterized in that: also comprise overvoltage actuating circuit, described overvoltage actuating circuit comprises voltage-stabiliser tube D2, d. c. voltage signal input and control signal output, and described power circuit comprises the half-wave rectifying circuit be connected with main circuit and the reduction voltage circuit be connected with half-wave rectifying circuit; The d. c. voltage signal input of overvoltage actuating circuit is connected with a direct current output node of half-wave rectifying circuit outlet side, control signal output is connected with the integrated chip of described electric leakage signal acquisition control circuit, when the d. c. voltage signal that the d. c. voltage signal input having served as pressure actuating circuit receives exceedes the limit value of voltage-stabiliser tube D2 of setting, described overvoltage actuating circuit exports control signal and performs trip action by the trip circuit described in triggering of integrated chip; Described electric leakage signal acquisition control circuit is also connected the residual current of monitoring main circuit with the direct current output node of reduction voltage circuit and main circuit respectively, and the trip circuit described in described integrated chip controls when residual current occurs abnormal performs trip action.
2. multifunction residual current action breaker circuit according to claim 1, is characterized in that: described overvoltage actuating circuit also comprises for resistance R13, the resistance R14 of dividing potential drop and the electric capacity C9 for filtering; One end of resistance R13 is connected with half-wave rectifying circuit, as the d. c. voltage signal input of described overvoltage actuating circuit, the other end of resistance R13 is connected with one end of resistance R14 parallel branch with electric capacity C9, the other end ground connection of electric capacity C9 and resistance R14 parallel branch, the negative pole of voltage-stabiliser tube D2 is connected with resistance R13, and the positive pole of voltage-stabiliser tube D2 is used as the control signal output of described overvoltage actuating circuit.
3. multifunction residual current action breaker circuit according to claim 2, is characterized in that: the described positive pole of voltage-stabiliser tube D2 being used as the control signal output of overvoltage actuating circuit is connected with the 4th pin of integrated chip; Or be connected in parallel with the 4th pin of integrated chip and the 5th pin.
4. multifunction residual current action breaker circuit according to claim 1, it is characterized in that: described power circuit also comprises surge absorbing circuit, wherein half-wave rectifying circuit comprises a rectifier diode VD1, its one end is connected with the A pole of the controllable silicon VT1 of trip circuit, and the other end is with tripping coil KA one end of trip circuit or be connected with one end of the piezo-resistance RV1 of surge absorbing circuit.
5. the multifunction residual current action breaker circuit according to claim 1 or 4, is characterized in that: the paster type resistor module that the reduction voltage circuit of described power circuit comprises electric capacity C8 and combined by multiple Chip-R; One end of paster type resistor module is connected with the negative pole of the diode VD1 of half-wave rectifying circuit, and is connected in parallel with the A pole of the d. c. voltage signal input of overvoltage actuating circuit, the controllable silicon VT1 of trip circuit; The other end and one end of electric capacity C8 of paster type resistor module connect and compose another direct current output node be connected with the integrated chip of electric leakage signal acquisition control circuit, the other end ground connection of electric capacity C8.
6. multifunction residual current action breaker circuit according to claim 5, is characterized in that: described paster type resistor module is formed by multiple Chip-R tandem compound; Or described paster type resistor module is formed by least two series patch resistor group parallel combinations, and wherein each series patch resistor group is formed by multiple Chip-R tandem compound; Or described paster type resistor module is formed by least two Chip-R group tandem compounds in parallel, and wherein each Chip-R group in parallel is formed by multiple Chip-R parallel combination.
7. multifunction residual current action breaker circuit according to claim 1, is characterized in that: described electric leakage signal acquisition control circuit comprises integrated chip, zero-sequence transformer TA, bidirectional diode D1, debugging resistance R1, resistance R2, resistance R3, electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4, electric capacity C5, electric capacity C6 and electric capacity C7; Debugging resistance R1, bidirectional diode D1, electric capacity C1 are connected in the two ends of the secondary circuit lead-in wire of zero-sequence transformer TA successively in parallel; One end of resistance R2 is connected with one end of electric capacity C1, and the other end of resistance R2 and one end of electric capacity C2, one end of electric capacity C3 and the first pin of integrated chip are connected in parallel; One end of resistance R3 is connected with the other end of electric capacity C1, and the other end of resistance R3 is connected with the other end of electric capacity C2, one end of electric capacity C4 and the second pin of integrated chip are connected in parallel; The other end of electric capacity C3 and the other end of electric capacity C4, the three-prong of integrated chip be connected ground; 4th pin of integrated chip and the positive pole of voltage-stabiliser tube D2 of the 5th pin and overvoltage actuating circuit, one end of electric capacity C5 are connected in parallel, the other end ground connection of electric capacity C5; 6th pin of integrated chip is connected with one end of electric capacity C6, the G pole of the 7th pin of integrated chip and the other end of electric capacity C6, one end of electric capacity C7, the controllable silicon VT1 of trip circuit is connected in parallel, the other end ground connection of electric capacity C7, the 8th pin of integrated chip is connected with another direct current output node of power circuit.
8. multifunction residual current action breaker circuit according to claim 4, it is characterized in that: described trip circuit comprises tripping coil KA and controllable silicon VT1, one end of tripping coil KA is connected in parallel with one end of the piezo-resistance RV1 of surge absorbing circuit, the live wire L exchanging input side of power circuit, and the other end of tripping coil KA is connected with the positive pole of the diode VD1 of half-wave rectifying circuit.
9. multifunction residual current action breaker circuit according to claim 4, it is characterized in that: described trip circuit comprises tripping coil KA and controllable silicon VT1, described one end of tripping coil KA is connected with the neutral line N parallel of the other end of the piezo-resistance RV1 of surge absorbing circuit, the interchange input side of power circuit, and the K pole of the other end of tripping coil KA and the controllable silicon VT1 of trip circuit, the other end of the electric capacity C9 of overvoltage actuating circuit and the other end of resistance R14 are connected in parallel.
10. multifunction residual current action breaker circuit according to claim 4, it is characterized in that: one end of the piezo-resistance RV1 of the surge absorbing circuit of described power circuit is connected in parallel with the live wire L exchanging input side with the diode VD1 of half-wave rectifying circuit, the other end of piezo-resistance RV1 is connected with the neutral line N of power circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520643496.4U CN204967234U (en) | 2015-08-24 | 2015-08-24 | Multi -functional residual current operated circuit breaker circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520643496.4U CN204967234U (en) | 2015-08-24 | 2015-08-24 | Multi -functional residual current operated circuit breaker circuit |
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| CN204967234U true CN204967234U (en) | 2016-01-13 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106300239A (en) * | 2016-08-16 | 2017-01-04 | 华通机电股份有限公司 | A kind of residual current action breaker |
| CN106451375A (en) * | 2016-08-29 | 2017-02-22 | 厦门盈瑞丰电子科技有限公司 | Residual current monitor for equipment |
| CN106711937A (en) * | 2016-12-26 | 2017-05-24 | 浙江万马新能源有限公司 | A-type earth leakage protection circuit of alternating-current charging pile |
-
2015
- 2015-08-24 CN CN201520643496.4U patent/CN204967234U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106300239A (en) * | 2016-08-16 | 2017-01-04 | 华通机电股份有限公司 | A kind of residual current action breaker |
| CN106300239B (en) * | 2016-08-16 | 2018-09-25 | 华通机电股份有限公司 | A kind of residual current action breaker |
| CN106451375A (en) * | 2016-08-29 | 2017-02-22 | 厦门盈瑞丰电子科技有限公司 | Residual current monitor for equipment |
| CN106711937A (en) * | 2016-12-26 | 2017-05-24 | 浙江万马新能源有限公司 | A-type earth leakage protection circuit of alternating-current charging pile |
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