CN201887427U - Residual current protection circuit breaker with communication and alarm functions - Google Patents
Residual current protection circuit breaker with communication and alarm functions Download PDFInfo
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- CN201887427U CN201887427U CN2010206733770U CN201020673377U CN201887427U CN 201887427 U CN201887427 U CN 201887427U CN 2010206733770 U CN2010206733770 U CN 2010206733770U CN 201020673377 U CN201020673377 U CN 201020673377U CN 201887427 U CN201887427 U CN 201887427U
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Abstract
The utility model relates to a residual current protection circuit breaker with communication and alarm functions, which belongs to the field of low-voltage power distribution protection devices. The residual current protection circuit breaker with the communication and alarm functions is provided with a residual current protection circuit with a communication function, and is characterized in that the residual current protection circuit with the communication function comprises a micro-processing circuit, a power circuit, a tripping control circuit, a communication and alarm circuit, a simulation test circuit, a setting circuit, a display circuit, a zero sequence current transformer and a signal conditioning circuit; the micro-processing circuit is connected with the tripping control circuit, the communication and alarm circuit, the simulation test circuit, the setting circuit, the display circuit and the signal conditioning circuit; the zero sequence current transformer is connected with the signal conditioning circuit and the simulation test circuit; and the power circuit supplies power to all the circuits. The residual current protection circuit breaker with the communication and alarm functions has the advantages of having the communication and alarm functions, and meeting the requirements of an electrical fire monitoring system; and an upper computer can remotely read the parameter information of the residual current protection circuit breaker and remotely control an electrical operation mechanism, so that the remote on and off of the residual current circuit breaker are realized.
Description
Technical field
The utility model relates to a kind of circuit breaker with residual current protecting, and particularly the residual current protecting circuit breaker of band communication warning function belongs to the low-voltage distribution protective device.
Background technology
Along with the day by day increase of China to electricity needs; use to electric equipment is more and more; locate to be easy to generate potential safety hazard at supply line, power consumption equipment and switchgear etc.; particularly the electrical fire accident that causes is the most common by insulation damages generation residual current (electric leakage); the residual current protecting circuit breaker is the circuit breaker that can shield to residual current; also be the disengagement failure circuit simultaneously, one of effective measures that fire preventing produces.
Patent document CN201018257Y discloses a kind of residual current circuit breaker with the electric leakage prior-warning device; it has had certain improvement to traditional residual current protecting circuit breaker; but overall intelligent degree is not high; need just can know leakage current generating by manual observation; can not realize " remote control ", " remote measurement ", " remote signalling ", " remote regulating " contour intelligentized function; can't accomplish real-time monitoring to the residual current in the circuit, find the potential safety hazard that exists early.Therefore need be a kind of, can overcome above-mentioned shortcoming, have the telecommunication warning function, also can make the residual current protecting circuit breaker of the usefulness of residual current fire monitor.
Summary of the invention
The utility model is to overcome the deficiencies in the prior art, and a kind of residual current protecting circuit breaker with band communication warning function of residual current protecting, warning and communication function is provided.
A kind of residual current protecting circuit breaker with the communication warning function; residual current protection circuit with band communication function; the residual current protection circuit that it is characterized in that described band communication function comprises micro-processor interface circuit; power circuit; the dropout control circuit; the communication warning circuit; simulation experiment circuit; initialization circuit; display circuit; zero sequence current mutual inductor and signal conditioning circuit; described micro-processor interface circuit and dropout control circuit; the communication warning circuit; simulation experiment circuit; initialization circuit; display circuit is connected with signal conditioning circuit; zero sequence current mutual inductor is connected with simulation experiment circuit with signal conditioning circuit, and power circuit is each circuit supply.
In a specific embodiment of the present utility model, described power circuit is by resistance R 10-R17, capacitor C 11-C19, inductance L 3, piezo-resistance RV1-RV3, diode D2-D7, double diode D8, voltage-stabiliser tube VZ2, voltage stabilizing didoe VD1, transient voltage suppressor VZ1, three terminal regulator N4-N7 and chip N8 form, resistance R 10, R11, the end of R12 respectively with A, B, C phase power supply connects, the anode of the other end of resistance R 10 and diode D2, the negative electrode of diode D5 and piezo-resistance RV1, the end of RV3 connects, the anode of the other end of resistance R 11 and diode D3, the negative electrode of diode D6, the other end of piezo-resistance RV1, the end of piezo-resistance RV2 connects, the anode of the other end of resistance R 12 and diode D4, the negative electrode of diode D7 and piezo-resistance RV2, the other end of RV3 connects, diode D2, D3, the other end of D4 is connected with an end of resistance R 13, the other end of resistance R 13 and capacitor C 11, one end of resistance R 14 is connected with the port Vin of three terminal regulator N4, capacitor C 11, the other end of resistance R 14 and capacitor C 12, one end of resistance R 15 is connected with the port G-C of three terminal regulator N4, capacitor C 12, the other end of resistance R 15 and capacitor C 13, one end of resistance R 16 is connected with the port G-C of three terminal regulator N5, capacitor C 13, the other end of resistance R 15 and capacitor C 14, one end of resistance R 17 is connected with the port G-C of three terminal regulator N6, the port Vout of three terminal regulator N4 meets the port Vin of three terminal regulator N5, the port Vout of three terminal regulator N5 meets the port Vin of three terminal regulator N6, the port Vout of three terminal regulator N6 meets the port Vin of three terminal regulator N7, the port G-C of three terminal regulator N7 connects the negative electrode of voltage-stabiliser tube VZ2, the port Vout of three-terminal voltage-stabilizing pipe N7 and capacitor C 15, the end of C16 is connected with the end of transient voltage suppressor VZ1 and output voltage+20V, the anode of double diode D8 meets voltage+20V, another anode of double diode D8 meets voltage+12V, 1 of one end of the negative electrode of double diode D8 and capacitor C 17 and chip N8,2,3 pin connect and output voltage V DD, 4 pin of chip N8 connect an end of inductance L 3 and the negative electrode of voltage stabilizing didoe VD1,8 pin of the other end of inductance L 3 and chip N8 and capacitor C 18, the end of C19 connects and output voltage V CC, the anode of voltage stabilizing didoe VD1 connects the other end of capacitor C 19, diode D5, D6, the anode of D7, capacitor C 14-C18, the other end of resistance R 17, the anode of voltage-stabiliser tube VZ2, the 5 pin common grounds of the other end of transient voltage suppressor VZ1 and chip N8.
In another specific embodiment of the present utility model, described micro-processor interface circuit is by chip N1, single-chip microcomputer N2, capacitor C 1-C5, resistance R 1, crystal oscillator G1 and button SW1, SW2 forms, 1 pin of chip N1 meets voltage VCC, 2 pin of chip N1 meet output voltage 2.5V behind the end of capacitor C 2 and connect 26 pin of single-chip microcomputer N2,7 of one end of capacitor C 2 and single-chip microcomputer N2,19 pin meet voltage VCC, capacitor C 4,6 pin of the termination single-chip microcomputer N2 of crystal oscillator G1, one end of capacitor C 5, the other end of crystal oscillator G1 connects 4 pin of single-chip microcomputer N2, resistance R 1,3 pin of one termination single-chip microcomputer N2 of capacitor C 3, another termination voltage VCC of resistance R 1,22 of single-chip microcomputer N2,15 pin meet button SW1 respectively, the end of SW2, capacitor C 1-C5, button SW1,5 of the other end of SW2 and single-chip microcomputer N2,21 pin common grounds.
In another specific embodiment of the present utility model, described initialization circuit is made up of binary-coded decimal toggle switch SW3, SW4,2,5 pin of binary-coded decimal toggle switch SW3, SW4 connect 12 pin of single-chip microcomputer N2 in the micro-processor interface circuit, and 3,4 pin of binary-coded decimal toggle switch SW4 are connected with 18,17 pin of single-chip microcomputer N2 respectively.
Go back in the specific embodiment of the present utility model, described simulation experiment circuit is by resistance R 2-R7, capacitor C 6-C9 and amplifier N3 form, 14 pin of single-chip microcomputer N2 in the one termination micro-processor interface circuit of resistance R 2, the other end connecting resistance R3 of resistance R 2, one end of capacitor C 6,5 pin of one termination amplifier N3 of the other end of resistance R 3 and resistance R 14,6 of one termination amplifier N3 of resistance R 7,7 pin, the other end of resistance R 7 and capacitor C 7, the end of the end of C8 and the testing coil L1 of zero sequence current mutual inductor is connected, the other end of capacitor C 8,1 of another termination amplifier N3 of the end of C9 and testing coil L1,2 pin, 31 pin of one termination single-chip microcomputer N2 of resistance R 6, the other end of resistance R 6,3 pin of the termination amplifier N3 of R5,8 pin of amplifier N3 meet voltage VCC, resistance R 4, R5, capacitor C 6, C7, the 4 pin common grounds of the other end of C9 and amplifier N3.
In of the present utility model and then specific embodiment, described dropout control circuit is made up of resistance R 8, R9, capacitor C 10, diode D1 and triode VT1,16 pin of one termination single-chip microcomputer N2 of resistance R 8, the base stage of one termination triode VT1 of one end of the other end of resistance R 8, resistance R 9 and capacitor C 10, the anode of the collector electrode of triode VT1 and diode D1 connects an end that takes off mouthful coil L2, another termination voltage VDD of the negative electrode of diode D1 and tripping coil L2, the other end of resistance R 9, capacitor C 10 and the emitter common ground of triode VT1.
More of the present utility model and in specific embodiment, described modulate circuit is by resistance R 18-R27, capacitor C 20-C26, double diode D9 and amplifier N9 form, resistance R 23, one end of capacitor C 24 and resistance R 27, the end of C26 respectively with micro-processor interface circuit in single- chip microcomputer N2 24,25 pin connect, 1 pin of another termination amplifier N9 of resistance R 23,8 pin of amplifier N9 meet voltage VCC, 2 of amplifier N9,3 pin respectively with resistance R 21, the end of R20 connects, the other end of resistance R 21 and resistance R 19, R22, one end of capacitor C 23 connects, resistance R 22, the end of the other end connecting resistance R25 of capacitor C 23, the other end of resistance R 25 and resistance R 24, one end of capacitor C 25 is connected with 6 pin of amplifier N9, resistance R 24, the other end of capacitor C 25 is connected with 7 pin of amplifier N9 and the other end of resistance R 27, the end of the 5 pin connecting resistance R26 of amplifier N9, another termination voltage+2.5V of resistance R 26, the end of the other end of resistance R 19 and double diode D9, capacitor C 20, the end of C22, the end of the measurement coil L4 of one end of resistance R 18 and zero sequence current mutual inductor is connected, the other end of the other end of resistance R 20 and double diode D9, capacitor C 20, the other end of resistance R 18, the end of C21, the other end of measuring coil L4 is connected capacitor C 21 with voltage+2.5V, C22, C24, the 4 pin common grounds of C25 and amplifier N9.
The utility model is owing to adopt technique scheme, and the residual current protecting circuit breaker has the communication warning function, can upload residual current instantaneous value in the circuit, fault message, dropout information, state information in real time, satisfies the requirement of electric fire monitoring system.Host computer can long-rangely read residual current protecting circuit breaker parameters information, and the remote control electric operating mechanism, realizes the long-range on/off switch of residual current circuit breaker.
Description of drawings,
Fig. 1 is the utility model theory diagram.
Fig. 2 is micro-processor interface circuit of the present utility model and initialization circuit figure.
Fig. 3 is simulation experiment circuit figure of the present utility model.
Fig. 4 is dropout control circuit figure of the present utility model.
Fig. 5 is a power circuit diagram of the present utility model.
Fig. 6 is display circuit figure of the present utility model.
Fig. 7 is signal conditioning circuit figure of the present utility model.
Fig. 8 is communication warning circuit figure of the present utility model.
Embodiment
In order to make the public can fully understand technical spirit of the present utility model and beneficial effect; the applicant will describe in detail embodiment of the present utility model below in conjunction with the accompanying drawings; but the applicant is not restriction to technical scheme to the description of embodiment, anyly makes form but not the variation of essence all should be considered as protection range of the present utility model according to the utility model design.
See also Fig. 1; a kind of residual current protecting circuit breaker with the communication warning function; residual current protection circuit with band communication function; the residual current protection circuit of described band communication function comprises micro-processor interface circuit; power circuit; the dropout control circuit; the communication warning circuit; simulation experiment circuit; initialization circuit; display circuit; zero sequence current mutual inductor and signal conditioning circuit; described micro-processor interface circuit and dropout control circuit; the communication warning circuit; simulation experiment circuit; initialization circuit; display circuit is connected with signal conditioning circuit; zero sequence current mutual inductor is connected with simulation experiment circuit with signal conditioning circuit, and power circuit is each circuit supply.
Zero sequence current mutual inductor is as sampling element; take the residual current in the three-phase line; by the signal conditioning circuit current signal that this is faint sample amplify after; sending into micro-processor interface circuit handles signal; signal after handling is delivered to display circuit to be shown; simultaneously judge according to set point whether the residual current protecting circuit breaker will move, and sends actuating signal to the dropout control circuit, drive actuator and make the instantaneous or deferred action of circuit breaker.The warning circuit of communicating by letter simultaneously can be delivered to host computer with the information of residual current protecting circuit breaker; and breaker controller; when residual current meets or exceeds set point in the three-phase line, send alarm signal, and can by local, Long-distance Control residual current protecting circuit breaker deciliter.Test the residual current protecting circuit breaker if desired whether during reliably working; press the residual current test button earlier; give triggering signal of micro-processor interface circuit; micro-processor interface circuit is exported corresponding PWM waveform to the testing coil of sending into zero sequence current mutual inductor after simulation experiment circuit is handled according to the signal characteristic of residual current; induction between the testing coil by zero sequence current mutual inductor and the measurement coil of zero sequence current mutual inductor produces signal; again signal is sent into signal conditioning circuit with this current signal sample amplify after; send into micro-processor interface circuit signal is handled; send actuating signal to the dropout control circuit again; drive actuator and make the action of residual current protecting circuit breaker, thus test whole test circuit and signal conditioning circuit operate as normal whether.
Seeing also Fig. 2 is micro-processor interface circuit and initialization circuit, and described micro-processor interface circuit includes voltage reference chip N1, single-chip microcomputer N2, capacitor C 1～C5, resistance R 1, crystal oscillator G1, button SW1, SW2.Single-chip microcomputer N2 adopts R5F21134, and voltage reference chip N1 preferably adopts MCP1702, and button SW1 is that parameter query button, button SW2 are the residual current test buttons.Described initialization circuit comprises two binary-coded decimal toggle switch SW3, and SW4 forms, and can carry out that time current is isoparametric to be adjusted.
Seeing also Fig. 3 is simulation experiment circuit; described simulation experiment circuit includes filter circuit; the testing coil of drive circuit and zero sequence current mutual inductor; pwm signal from micro-processor interface circuit is connected to by resistance R 2～R4; the filter circuit that capacitor C 6 is formed; filter circuit carries out shaping with pwm signal; deliver to then by amplifier N3 (preferred model LM258); resistance R 5～R7; the drive circuit that capacitor C 7～C9 forms is handled; the testing coil L1 that outputs to zero sequence current mutual inductor again produce deliver to behind the test current signal conditioning circuit with this current signal sample amplify after; sending into micro-processor interface circuit handles signal; send actuating signal to the dropout control circuit again; drive actuator and make the action of residual current protecting circuit breaker, thus test whole test circuit and signal conditioning circuit operate as normal whether.
Seeing also Fig. 4 is the dropout control circuit, described dropout control circuit includes control circuit and diode D1, delivers to the control circuit control tripping coil L2 of resistance R 8～R9, capacitor C 10, triode VT1 (preferred model is 9013) composition from the actuating signal TK of micro-processor interface circuit.
Seeing also Fig. 5 is power circuit; described power circuit includes rectification circuit, voltage stabilizing circuit and DC-DC circuit; described rectification circuit is made up of current-limiting resistance, overvoltage crowbar, three-phase bridge rectifier circuit; wherein current-limiting resistance R10～R12 is connected to the three-phase power line of circuit breaker load-side; piezo-resistance RV1～RV3 forms overvoltage crowbar, and diode D2～D7 forms three-phase bridge rectifier circuit.Described voltage stabilizing circuit is made up of capacitance-resistance bleeder circuit, serial regulating circuit, described capacitance-resistance bleeder circuit is made up of resistance R 13～R17, capacitor C 11～C14, described serial regulating circuit is made up of three terminal regulator N4～N7, voltage-stabiliser tube VZ2, capacitor C 15～C16 and transient voltage suppressor VZ1, the capacitance-resistance bleeder circuit will be after step-down the balanced dividing potential drop of direct voltage after-applied in serial regulating circuit, serial regulating circuit generates+power-switching circuit of 20V voltage and the warning circuit of communicating by letter exports+12V voltage is input to the DC-DC circuit behind double diode D8.Described DC-DC circuit comprises double diode D8, inductance L 3, capacitor C 17～C19, voltage stabilizing didoe VD1 and power supply control chip N8 (preferred model LT1111), and the operating voltage VCC that the DC-DC circuit generates provides micro-processor interface circuit, signal conditioning circuit, dropout control circuit, display circuit and simulation experiment circuit.
Seeing also Fig. 6 is display circuit, and the utility model preferentially adopts LCD to show, the shows signal that display circuit receives micro-processor interface circuit shows.2,3,4 pin of the LCDs LCD of display circuit are connected with 27,20,8 pin of single-chip microcomputer N2 respectively, and 1,5 pin of LCDs are ground connection and meet voltage VCC respectively.Wherein LCDs LCD adopts CC1N1339.
Seeing also Fig. 7 is signal conditioning circuit, described signal conditioning circuit includes sample circuit and amplifying circuit, the measurement coil L4 of zero sequence current mutual inductor is connected to the sample circuit of being made up of resistance R 18, capacitor C 20～C21, double diode D9, sampled signal is connected to the two-stage amplifying circuit that is made of operational amplifier N9 (preferred model TLC2252), wherein the signal of AD1 output satisfies wide range amplification needs, the signal of AD2 output satisfies Cheng Fangda needs in a small amount, sends into micro-processor interface circuit and handles.
See also Fig. 8 and control system circuit, network control circuit and circuit for the communication warning circuit comprises power-switching circuit, MCU circuit, communication interface circuit, electricity, described power-switching circuit is by power module N11, N12, power supply control chip N10, TVS pipe VZ3, VZ4, diode D10, resistance R 28, R29, capacitor C 27～C30, and piezo-resistance RV4 forms.Described MCU circuit is made up of single-chip microcomputer N13, crystal oscillator G2, capacitor C 31～C33 and resistance R 30, and described single-chip microcomputer N13 adopts the RJF21192 chip.Described communication interface circuit is made up of integrated chip N14, resistance R 31～R35, TVS pipe VZ5, VZ6, anti-thunder tube FV1, FV2, FV3 and LED 1.Described electricity is controlled the system circuit and is made up of optocoupler NB1, NB2, diode D11, D12, resistance R 36, R37, capacitor C 34, C35 and relay K 1, K2.Described network control circuit is by optocoupler NB3, resistance R 38, and R39 and capacitor C 36 are formed.Described circuit is by optocoupler NB4, diode D13, resistance R 40～R44, relay K 3, LED 2, controllable silicon VT2, capacitor C 37, compositions such as C38 and button S1.Described power-switching circuit with external+24V accessory power supply through power-switching circuit convert to+the 12V operating voltage ,+the 5V operating voltage, be each circuit supply of communication warning circuit.The on/off switch signal that provides from micro-processor interface circuit and the inner sensitive switch of residual current protecting circuit breaker is provided 1 pin of described MCU circuit by single-chip microcomputer N13; and A, B by communication interface circuit end delivers to host computer with signal, realizes the telecommunication function.Described electricity is controlled the system circuit and can be controlled the system circuit to electricity according to the instruction of host computer the execution signal is provided.Described network control circuit is differentiated the present operating state of circuit breaker with the height of outputs level signals.A utility model also technical scheme is that a communication accessories that provides for the residual current protecting circuit breaker is a breaker controller, circuit breaker is the Long-distance Control state when network control circuit is output as high level signal, have only host computer to operate and to revise parameter to circuit breaker this moment, and breaker controller can only data query; Circuit breaker then is local state when being output as low level signal, and have only breaker controller to operate and to revise parameter to circuit breaker this moment, and host computer can only reading of data.Described circuit is that circuit connects devices such as sound, light and carries out long-distance alarm after the residual current fault occurring on the residual current protecting circuit breaker.
Claims (7)
- One kind with communication warning function the residual current protecting circuit breaker; residual current protection circuit with band communication function; the residual current protection circuit that it is characterized in that described band communication function comprises micro-processor interface circuit; power circuit; the dropout control circuit; the communication warning circuit; simulation experiment circuit; initialization circuit; display circuit; zero sequence current mutual inductor and signal conditioning circuit; described micro-processor interface circuit and dropout control circuit; the communication warning circuit; simulation experiment circuit; initialization circuit; display circuit is connected with signal conditioning circuit; zero sequence current mutual inductor is connected with simulation experiment circuit with signal conditioning circuit, and power circuit is each circuit supply.
- 2. the residual current protecting circuit breaker of band communication warning function according to claim 1; it is characterized in that described power circuit is by resistance R 10-R17; capacitor C 11-C19; inductance L 3; piezo-resistance RV1-RV3; diode D2-D7; double diode D8; voltage-stabiliser tube VZ2; voltage stabilizing didoe VD1; transient voltage suppressor VZ1; three terminal regulator N4-N7 and chip N8 form; resistance R 10; R11; the end of R12 respectively with A; B; C phase power supply connects; the anode of the other end of resistance R 10 and diode D2; the negative electrode of diode D5 and piezo-resistance RV1; the end of RV3 connects; the anode of the other end of resistance R 11 and diode D3; the negative electrode of diode D6; the end of the other end piezo-resistance RV2 of piezo-resistance RV1 connects; the anode of the other end of resistance R 12 and diode D4; the negative electrode of diode D7 and piezo-resistance RV2; the other end of RV3 connects; diode D2; D3; the other end of D4 is connected with an end of resistance R 13; the other end of resistance R 13 and capacitor C 11; one end of resistance R 14 is connected with the port Vin of three terminal regulator N4; capacitor C 11; the other end of resistance R 14 and capacitor C 12; one end of resistance R 15 is connected with the port G-C of three terminal regulator N4; capacitor C 12; the other end of resistance R 15 and capacitor C 13; one end of resistance R 16 is connected with the port G-C of three terminal regulator N5; capacitor C 13; the other end of resistance R 15 and capacitor C 14; one end of resistance R 17 is connected with the port G-C of three terminal regulator N6; the port Vout of three terminal regulator N4 meets the port Vin of three terminal regulator N5; the port Vout of three terminal regulator N5 meets the port Vin of three terminal regulator N6; the port Vout of three terminal regulator N6 meets the port Vin of three terminal regulator N7; the port G-C of three terminal regulator N7 connects the negative electrode of voltage-stabiliser tube VZ2; the port Vout of three-terminal voltage-stabilizing pipe N7 and capacitor C 15; the end of C16 is connected with the end of transient voltage suppressor VZ1 and output voltage+20V; the anode of double diode D8 meets voltage+20V; another anode of double diode D8 meets voltage+12V; 1 of one end of the negative electrode of double diode D8 and capacitor C 17 and chip N8; 2; 3 pin connect and output voltage V DD; 4 pin of chip N8 connect an end of inductance L 3 and the negative electrode of voltage stabilizing didoe VD1; 8 pin of the other end of inductance L 3 and chip N8 and capacitor C 18; the end of C19 connects and output voltage V CC; the anode of voltage stabilizing didoe VD1 connects the other end of capacitor C 19, diode D5; D6; the anode of D7; capacitor C 14-C18; the other end of resistance R 17; the anode of voltage-stabiliser tube VZ2; the 5 pin common grounds of the other end of transient voltage suppressor VZ1 and chip N8.
- 3. the residual current protecting circuit breaker of band communication warning function according to claim 1; it is characterized in that described micro-processor interface circuit is by chip N1; single-chip microcomputer N2; capacitor C 1-C5; resistance R 1; crystal oscillator G1 and button SW1; SW2 forms; 1 pin of chip N1 meets voltage VCC; 2 pin of chip N1 meet output voltage 2.5V behind the end of capacitor C 2 and connect 26 pin of single-chip microcomputer N2; 7 of one end of capacitor C 2 and single-chip microcomputer N2; 19 pin meet voltage VCC; capacitor C 4; 6 pin of the termination single-chip microcomputer N2 of crystal oscillator G1; one end of capacitor C 5; the other end of crystal oscillator G1 connects 4 pin of single-chip microcomputer N2; resistance R 1; 3 pin of one termination single-chip microcomputer N2 of capacitor C 3; another termination voltage VCC of resistance R 1; 22 of single-chip microcomputer N2; 15 pin meet button SW1 respectively; the end of SW2, capacitor C 1-C5; button SW1; 5 of the other end of SW2 and single-chip microcomputer N2; 21 pin common grounds.
- 4. the residual current protecting circuit breaker of band communication warning function according to claim 1; it is characterized in that described initialization circuit is made up of binary-coded decimal toggle switch SW3, SW4; 2,5 pin of binary-coded decimal toggle switch SW3, SW4 connect 12 pin of single-chip microcomputer N2 in the micro-processor interface circuit, and 3,4 pin of binary-coded decimal toggle switch SW4 are connected with 18,17 pin of single-chip microcomputer N2 respectively.
- 5. the residual current protecting circuit breaker of band communication warning function according to claim 1; it is characterized in that described simulation experiment circuit is by resistance R 2-R7; capacitor C 6-C9 and amplifier N3 form; 14 pin of single-chip microcomputer N2 in the one termination micro-processor interface circuit of resistance R 2; the other end connecting resistance R3 of resistance R 2; one end of capacitor C 6; 5 pin of one termination amplifier N3 of the other end of resistance R 3 and resistance R 14; 6 of one termination amplifier N3 of resistance R 7; 7 pin; the other end of resistance R 7 and capacitor C 7; the end of the end of C8 and the testing coil L1 of zero sequence current mutual inductor is connected; the other end of capacitor C 8; 1 of another termination amplifier N3 of the end of C9 and testing coil L1; 2 pin; 31 pin of one termination single-chip microcomputer N2 of resistance R 6; the other end of resistance R 6; 3 pin of the termination amplifier N3 of R5; 8 pin of amplifier N3 meet voltage VCC, resistance R 4; R5; capacitor C 6; C7; the 4 pin common grounds of the other end of C9 and amplifier N3.
- 6. the residual current protecting circuit breaker of band communication warning function according to claim 1; it is characterized in that described dropout control circuit is by resistance R 8; R9; capacitor C 10; diode D1 and triode VT1 form; 16 pin of one termination single-chip microcomputer N2 of resistance R 8; the other end of resistance R 8; the base stage of one termination triode VT1 of one end of resistance R 9 and capacitor C 10; the anode of the collector electrode of triode VT1 and diode D1 connects the end of tripping coil L2; the negative electrode of diode D1 and another termination voltage VDD that takes off mouthful coil L2, resistance R 9; the emitter common ground of the other end of capacitor C 10 and triode VT1.
- 7. the residual current protecting circuit breaker of band communication warning function according to claim 1; it is characterized in that described modulate circuit is by resistance R 18-R27; capacitor C 20-C26; double diode D9 and amplifier N9 form; resistance R 23; one end of capacitor C 24 and resistance R 27; the end of C26 respectively with micro-processor interface circuit in single-chip microcomputer N2 24; 25 pin connect; 1 pin of another termination amplifier N9 of resistance R 23; 8 pin of amplifier N9 meet voltage VCC; 2 of amplifier N9; 3 pin respectively with resistance R 21; the end of R20 connects; the other end of resistance R 21 and resistance R 19; R22; one end of capacitor C 23 connects; resistance R 22; the end of the other end connecting resistance R25 of capacitor C 23; the other end of resistance R 25 and resistance R 24; one end of capacitor C 25 is connected with 6 pin of amplifier N9; resistance R 24; the other end of capacitor C 25 is connected with 7 pin of amplifier N9 and the other end of resistance R 27; the end of the 5 pin connecting resistance R26 of amplifier N9; another termination voltage+2.5V of resistance R 26; the end of the other end of resistance R 19 and double diode D9; capacitor C 20; the end of C22; the end of the measurement coil L4 of one end of resistance R 18 and zero sequence current mutual inductor is connected; the other end of the other end of resistance R 20 and double diode D9; capacitor C 20; the other end of resistance R 18; the end of C21; the other end of measuring coil L4 is connected capacitor C 21 with voltage+2.5V; C22; C24; the 4 pin common grounds of C25 and amplifier N9.
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| CN2010206733770U CN201887427U (en) | 2010-12-22 | 2010-12-22 | Residual current protection circuit breaker with communication and alarm functions |
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| CN103364628A (en) * | 2013-07-15 | 2013-10-23 | 长城电器集团有限公司 | Residual current signal conditioning circuit |
| CN103399236A (en) * | 2013-08-01 | 2013-11-20 | 德力西电气有限公司 | Residual current protection testing circuit |
| CN104198794A (en) * | 2014-07-23 | 2014-12-10 | 浙江天正电气股份有限公司 | Zero sequence current transformer wire-break detection and residual current detection circuit |
| CN105680416A (en) * | 2016-03-22 | 2016-06-15 | 首瑞（天津）电气设备有限公司 | Residual current protector |
| CN114035106A (en) * | 2021-10-19 | 2022-02-11 | 广西电网有限责任公司防城港供电局 | PT secondary side multipoint grounding fault finder based on multimode current measurement |
-
2010
- 2010-12-22 CN CN2010206733770U patent/CN201887427U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103364628A (en) * | 2013-07-15 | 2013-10-23 | 长城电器集团有限公司 | Residual current signal conditioning circuit |
| CN103399236A (en) * | 2013-08-01 | 2013-11-20 | 德力西电气有限公司 | Residual current protection testing circuit |
| CN103399236B (en) * | 2013-08-01 | 2015-12-02 | 德力西电气有限公司 | A kind of hookup of residual current protecting |
| CN104198794A (en) * | 2014-07-23 | 2014-12-10 | 浙江天正电气股份有限公司 | Zero sequence current transformer wire-break detection and residual current detection circuit |
| CN105680416A (en) * | 2016-03-22 | 2016-06-15 | 首瑞（天津）电气设备有限公司 | Residual current protector |
| CN105680416B (en) * | 2016-03-22 | 2018-05-18 | 首瑞（天津）电气设备有限公司 | Residual current operated protective device |
| CN114035106A (en) * | 2021-10-19 | 2022-02-11 | 广西电网有限责任公司防城港供电局 | PT secondary side multipoint grounding fault finder based on multimode current measurement |
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