CN201910385U - Intelligent controller for breaker with residual current protection - Google Patents
Intelligent controller for breaker with residual current protection Download PDFInfo
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- CN201910385U CN201910385U CN2010206270213U CN201020627021U CN201910385U CN 201910385 U CN201910385 U CN 201910385U CN 2010206270213 U CN2010206270213 U CN 2010206270213U CN 201020627021 U CN201020627021 U CN 201020627021U CN 201910385 U CN201910385 U CN 201910385U
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Abstract
Disclosed is an intelligent controller for a breaker with residual current protection, which belongs to the technical field of low-voltage distribution. In the controller, a Rogowski coil is connected with a load running current signal sampling and amplifying circuit, a rapid saturation coil is connected with a power-supply circuit which provides various power sources to other circuits, a residual current transformer is connected with a residual current signal sampling and amplifying circuit and a simulating residual current signal generating circuit, a load running voltage signal sampling and amplifying circuit, the residual current signal sampling and amplifying circuit, the residual current signal sampling and amplifying circuit, the simulating residual current signal generating circuit and a control executing circuit are connected with a microprocessor circuit. The controller has the advantages that the controller has the functions of line-operation current-overload or short-circuit protection and residual current protection, particularly has the function of wire breaking detection of the connecting wire between the residual current transformer and the intelligent controller or the coil of the residual current transformer.
Description
Technical field
The utility model relates to a kind of intelligent controller for circuit breakers; particularly with the intelligent controller for circuit breakers of residual current protecting; except having circuit running current overload or short-circuit protection function, also have the residual current protecting function, belong to the low-voltage distribution field.
Background technology
Circuit breaker is a very important element in the low-voltage distribution system; general circuit breaker all has three-stage protection function and ground protection function at present; in order further to improve the purpose of safety utilization of electric power; prevent operating personnel's the electric shock and the generation of electrical fire, circuit breaker also has the residual current protecting function.The circuit breaker that generally has the residual current protecting function also provides simulation residual current test function, and whether this function allows the user regularly detect circuit breaker residual current protecting function normal, needs breaking circuit breaker when user trial.As everyone knows, do not allow breaker open operation some important events users, in case but the connecting line or the residual current transformer coil windings of while residual current transformer and intelligent controller break, when real residual current occurs, circuit breaker just can't detect residual current, therefore timely breaking circuit breaker so probably brings electrical fire or operating personnel's electric shock accidents takes place, and this is quite danger.
Summary of the invention
The purpose of this utility model provides a kind of intelligent controller for circuit breakers with residual current protecting; except having circuit running current overload or short-circuit protection function; also have the residual current protecting function, particularly have the function that connecting line or residual current transformer coil to residual current transformer and intelligent controller carry out burn out detection.
The purpose of this utility model reaches like this; a kind of intelligent controller for circuit breakers with residual current protecting; comprise residual current transformer; microcontroller circuit; residual current signal sampling amplifying circuit; simulation residual current signal generating circuit; but eat the Paderewski coil; the speed saturable inductor; load running voltage sample amplifying circuit; load running current signal sampling amplifying circuit; power-supplying circuit and control executive circuit; but eating the Paderewski coil is connected with load running current signal sampling amplifying circuit; the speed saturable inductor is connected with power-supplying circuit; power-supplying circuit provides various power supplys to other circuit; residual current transformer is connected load running voltage sample amplifying circuit with residual current signal sampling amplifying circuit with simulation residual current signal generating circuit; load running current signal sampling amplifying circuit; residual current signal sampling amplifying circuit; simulation residual current signal generating circuit is connected with microcontroller circuit with the control executive circuit.
Simulation residual current signal generating circuit described in the utility model is by metal-oxide-semiconductor V5, V6, resistance R 23, R24, R25, R40, capacitor C 8, bi-directional voltage stabilizing pipe FV2 and interface X8 form, 5 pin of single-chip microcomputer N3 in the one termination microcontroller circuit of resistance R 23, one end of the other end of resistance R 23 and resistance R 40, the G utmost point of metal-oxide-semiconductor V5, the G utmost point of metal-oxide-semiconductor V6 connects, the S utmost point of the other end of resistance R 40 and metal-oxide-semiconductor V5 meets power supply VCC, the end of the D utmost point connecting resistance R24 of the D utmost point of metal-oxide-semiconductor V5 and metal-oxide-semiconductor V6, the S utmost point ground connection of metal-oxide-semiconductor V6, the other end of resistance R 24 and capacitor C 8, resistance R 25, the end of bi-directional voltage stabilizing pipe FV2 is connected with 2 pin of interface X8, capacitor C 8, resistance R 25, the other end of bi-directional voltage stabilizing pipe FV2 and the port one of interface X8 meet reference voltage V ref, the K1 of interface X8 and residual current transformer testing coil, K2 holds connection.
Microcontroller circuit described in the utility model is by single-chip microcomputer N3, chip N4, N6, resistance R 13, R14, R22, crystal oscillator G1, capacitor C 6, C7, C9 and interface X7 form, resistance R 13, the end of R14 respectively with 1 of interface X7,4 pin connect, resistance R 13, the other end of R14 respectively with 30 of single-chip microcomputer N3,31 pin connect, 10 pin of single-chip microcomputer N3 are connected with an end of the end of crystal oscillator G1 and capacitor C 6,8 pin of single-chip microcomputer N3 are connected with an end of the other end of crystal oscillator G1 and capacitor C 7,2 pin of chip N4 are connected with 7 pin of single-chip microcomputer N3 with an end of resistance R 22,2 pin of chip N6 are connected with 46 pin of single-chip microcomputer N3 with an end of capacitor C 9,2 pin of interface X7,3 of chip N4,4 pin, 11 of 1 pin of chip N6 and single-chip microcomputer N3,47 pin meet power supply VCC jointly, 3 pin of interface X7, capacitor C 6, C7, the other end of C9, the other end of resistance R 22,1 pin of chip N4,9 of 3 pin of chip N6 and single-chip microcomputer N3,14 pin common grounds, interface X7 connects host computer.
Residual current signal sampling amplifying circuit described in the utility model is by resistance R 1-R5, capacitor C 12-C16, bidirectional diode VD2, amplifier N1 and interface X1 form, resistance R 1, R2, capacitor C 12, C13, the end of bidirectional diode VD2 is connected with 2 pin of interface X1, resistance R 1, capacitor C 13, the other end of bidirectional diode VD2, resistance R 3, one end of capacitor C 14 and 1 pin of interface X1 meet reference voltage V ref, the other end of resistance R 2 and resistance R 4,13 pin of one termination amplifier N1 of capacitor C 15,12 pin of another termination amplifier N1 of resistance R 3, resistance R 4,14 pin of one termination amplifier N1 of the other end of capacitor C 15 and resistance R 5,45 pin of single-chip microcomputer N3 in the one termination microcontroller circuit of the other end of resistance R 5 and capacitor C 16, capacitor C 12, C14, the other end common ground of C16, interface X1 and residual current transformer are measured the S1 of coil, S2 holds connection.
Load running voltage sample amplifying circuit described in the utility model is by resistance R 7-R12, bidirectional diode VD1, amplifier N1 and interface X2 form, resistance R 7, the end of R9 respectively with 2 of interface X2,1 pin connects, interface X2 is connected with load terminal voltage, resistance R 7, the other end of R9 respectively with resistance R 8, the end of R10 connects, the end of the other end of resistance R 8 and bidirectional diode VD1, one end of resistance R 11 is connected with 9 pin of amplifier N1,8 pin of the other end of resistance R 11 and amplifier N1 connect that 39 pin of single-chip microcomputer N3 are connected in the microcontroller circuit, the other end of resistance R 10,10 pin of one termination amplifier N1 of the other end of bidirectional diode VD1 and resistance R 12, another termination reference voltage V ref of resistance R 12.
Load running current signal sampling amplifying circuit described in the utility model is by resistance R 15-R20, capacitor C 1, C3, amplifier N1 and interface X5 form, 2 pin of one termination interface X5 of resistance R 15, capacitor C 1, one end of resistance R 16 and 1 pin of interface X5 meet reference voltage V ref, but interface X5 is connected with the two ends of eating the Paderewski coil, resistance R 15, R16,3 pin of another termination amplifier N1 of capacitor C 1,4 pin of amplifier N1 meet power supply VCC, 1 of amplifier N1, the end of 2 pin connecting resistance R17, the other end of resistance R 17,6 pin of one termination amplifier N1 of resistance R 19, the other end of resistance R 19,7 pin of one termination amplifier N1 of resistance R 20,43 pin of single-chip microcomputer N3 in the one termination microcontroller circuit of the other end of resistance R 20 and capacitor C 3,5 pin of one termination amplifier N1 of resistance R 18, another termination reference voltage V ref of resistance R 18,11 pin of amplifier N1 and the other end common ground of capacitor C 3.
Power-supplying circuit described in the utility model is by diode VD3-VD8, capacitor C 4, C5, C10, bi-directional voltage stabilizing pipe FV1, rectifier bridge VB1, power module N7, N8 and interface X3, X4 forms, the negative electrode of diode VD3,2 pin of the anode connection interface X3 of VD4, the negative electrode of diode VD5,1 pin of the anode connection interface X3 of VD6, interface X3 is connected with the two ends of fast saturable inductor, diode VD4, the negative electrode of VD6 connects the anode of diode VD8,2 pin of the termination interface X4 of 2 pin of rectifier bridge VB1 and bi-directional voltage stabilizing pipe FV1,2 pin of the other end connection interface X4 of 3 pin of rectifier bridge VB1 and bi-directional voltage stabilizing pipe FV1, interface X4 is connected with accessory power supply, 1 pin of rectifier bridge VB1 connects the anode of diode VD7, diode VD7, one end output voltage V P of the negative electrode of VD8 and capacitor C 4 also connects 1 pin of power module N7,3 pin of power module N7, one end of capacitor C 5 connects back out-put supply VCC, 1 pin of power module N8 meets power supply VCC, 2 pin of power module N8 are connected with an end of capacitor C 10 and output reference voltage Vref, 4 pin of rectifier bridge VB1, capacitor C 4, C5, the other end of C10, the 3 pin common grounds of 2 pin of power module N7 and power module N8.
Control executive circuit described in the utility model comprises trip circuit, display circuit, telecommunication circuit and relay drive circuit, and trip circuit, display circuit, telecommunication circuit and relay drive circuit are connected with microcontroller circuit respectively.
Display circuit described in the utility model is by resistance R 26-R37, triode V1-V4, chip N5 and display screen E1 form, 2 of chip N5,3,4,5,6,7,8,9 pin meet 14 of single-chip microcomputer N3 in the microcontroller circuit respectively, 15,16,17,18,19,20,21 pin, 12 of chip N5,13,14,15,16,17,18,19 pin are connecting resistance R37 respectively, R36, R35, R34, R33, R32, R31, the end of R30, resistance R 30, R31, R32, R33, R34, R35, R36, the other end of R37 meets a of display screen E1 respectively, b, c, d, e, f, g, the dp pin, 11 pin of chip N5 meet power supply VCC, resistance R 26, R27, R28, in the termination microcontroller circuit of R29 22 of single-chip microcomputer N3,23,24,25 pin, resistance R 26, R27, R28, the other end of R29 respectively with triode V1, V2, V3, the base stage of V4 connects, triode V1, V2, V3, the emitter of V4 respectively with the L1 of display screen E1, L2, L3, the L4 pin connects, 1 pin of chip N5 and triode V1, V2, V3, the collector electrode common ground of V4.
Trip circuit described in the utility model is by resistance R 38, R39, capacitor C 11, diode VD9, triode VT2, VT3 and interface X6 form, one end of resistance R 38 is connected with 32 pin of single-chip microcomputer N3 in the microcontroller circuit, the other end of resistance R 38 and resistance R 39, one end of capacitor C 11 is connected with the base stage of triode VT2, the emitter of triode VT2 connects the base stage of triode VT3, the anode of diode VD9 meets voltage VP, the negative electrode of diode VD9, triode VT2,2 pin of the collector electrode connection interface X6 of VT3, resistance R 39, the other end of capacitor C 11, the 2 pin common grounds of the emitter of triode VT3 and interface X6, interface X5 is connected with the circuit breaker tripping coil.
The utility model is owing to adopted above technical scheme; except having circuit running current overload or short-circuit protection function; also have the residual current protecting function, particularly have the function that connecting line or residual current transformer coil to residual current transformer and intelligent controller carry out burn out detection.
Description of drawings
Fig. 1 is a theory diagram of the present utility model.
But Fig. 2 is for eating Paderewski coil schematic diagram.
Fig. 3 is fast saturable inductor schematic diagram.
Fig. 4 is the residual current transformer schematic diagram.
Fig. 5 is a simulation residual current signal generating circuit schematic diagram of the present utility model.
Fig. 6 is a microcontroller circuit schematic diagram of the present utility model.
Fig. 7 is a residual current signal sampling amplifying circuit schematic diagram of the present utility model.
Fig. 8 is a load running voltage sample amplifying circuit schematic diagram of the present utility model.
Fig. 9 is a load running current signal sampling amplifying circuit schematic diagram of the present utility model.
Figure 10 is a power-supplying circuit schematic diagram of the present utility model.
Figure 11 is a display circuit schematic diagram of the present utility model.
Figure 12 is a trip circuit schematic diagram of the present utility model.
Figure 13 is a relay drive circuit schematic diagram of the present utility model.
Embodiment
Referring to Fig. 1, but the two ends of eating Paderewski coil (Fig. 2) are connected with load running current signal sampling amplifying circuit (Fig. 9) through interface X5, speed saturable inductor (Fig. 3) two ends are connected with power-supplying circuit (Figure 10) by interface X3, residual current transformer (Fig. 4) is measured the two ends S1 of coil, S2 is connected with residual current signal sampling amplifying circuit (Fig. 7) by interface X1, residual current transformer testing coil K1, K2 is connected with simulation residual current signal generating circuit (Fig. 5) by interface X8, in the microcontroller circuit (Fig. 6): N3 is the M3062 single-chip microcomputer, N6 is the MAX6102 chip, and N4 is the MAX821 chip.In the power-supplying circuit (Figure 10): VB1 is the SINB80 rectifier bridge, and N7 is 7805 power modules, and N8 is the MAX6102 power module.In the display circuit (Figure 11): E1 is the 4BS2501T display screen, and N5 is the 74AHC573 chip.N1 is the LM224 amplifier.
Referring to Figure 13, relay drive circuit is made up of resistance R 6, R41, diode VD10, VD11, triode VT1 and relay J 1,33 pin of single-chip microcomputer N3 in the one termination microcontroller circuit of resistance R 41, the other end of resistance R 41 is connected with an end of resistance R 6 and the base stage of triode VT1, the collector electrode of triode VT1 is connected with the anode of diode VD11 and an end of relay J 1 coil, the negative electrode of another terminating diode VD10 of the negative electrode of diode VT1 and relay J 1 coil, the anode of diode VD10 meets voltage VP.
Workflow of the present utility model is such: but eat the Paderewski coil by gathering the load running current signal, secondary singal is directly proportional with a signal, handle back input microprocessor circuit by load current signal sampling amplifying circuit again, calculate concrete load running current value by A/D conversion back single-chip microcomputer, when single-chip microcomputer is judged load running current overload or short circuit, thereby mechanism's disconnection of circuit breaker is separated faulty line from electrical network with sending instruction drive controlling executive circuit.Single-chip microcomputer load calculated current value shows in real time by display circuit.
By fast saturable inductor, a running current from load induces energy and offers power-supplying circuit, and power-supplying circuit provides the operate as normal of various power supplys to other all circuit again.
By load running voltage sample amplifying circuit (Fig. 8), send the magnitude of voltage of load end to microcontroller circuit, single-chip microcomputer calculates the back by the real-time display voltage value of display circuit.
Trip circuit is seen Figure 12.
Gather the residual current that occurs in the load by residual current transformer, by sending microcontroller circuit to after the processing of residual current signal sampling amplifying circuit, after single-chip microcomputer judges that residual current surpasses preset threshold, thereby send instruction drive controlling executive circuit mechanism's disconnection of circuit breaker is separated faulty line from electrical network, display circuit can show fault message simultaneously.
By simulation residual current signal generating circuit, single-chip microcomputer sends an impulse train with an I/O mouth every certain time interval, and (each pulse period is very little, for example have only several milliseconds) open two metal-oxide-semiconductors in turn and (be respectively the P raceway groove, the N raceway groove), output at these two metal-oxide-semiconductors forms and the similar waveform of impulse train, the testing coil of input residual current transformer, measure coil according to electromagnetic induction principle and will induce a little residual current signal, signal is through sampling processing, send the A/D thief hatch of single-chip microcomputer after the amplification to, single-chip microcomputer is after sampling processing, compare with a reference voltage V ref who sets, after single-chip microcomputer is judged less than Vref, just think the connecting line or the residual current transformer coil breakage of residual current transformer and intelligent controller, otherwise then do not break.Certainly it is emphasized that here Vref is littler than the least residue current trip threshold value of circuit breaker, for example is 1/10th of minimum trip threshold value, otherwise misoperation just easily takes place circuit breaker.When single-chip microcomputer is judged as broken string, also can remind the connecting line of user's residual current transformer and intelligent controller or residual current transformer coil to break by the indicator light mode of display circuit, must safeguard at once.
By telecommunication circuit, intelligent controller can carry out exchanges data with host computer, comprises the instantaneous value of various protection setting values and load current, voltage signal, and host computer also can be monitored in real time to intelligent controller.
Claims (10)
1. intelligent controller for circuit breakers with residual current protecting; it is characterized in that comprising residual current transformer; microcontroller circuit; residual current signal sampling amplifying circuit; simulation residual current signal generating circuit; but eat the Paderewski coil; the speed saturable inductor; load running voltage sample amplifying circuit; load running current signal sampling amplifying circuit; power-supplying circuit and control executive circuit; but eating the Paderewski coil is connected with load running current signal sampling amplifying circuit; the speed saturable inductor is connected with power-supplying circuit; power-supplying circuit provides various power supplys to other circuit; residual current transformer is connected load running voltage sample amplifying circuit with residual current signal sampling amplifying circuit with simulation residual current signal generating circuit; load running current signal sampling amplifying circuit; residual current signal sampling amplifying circuit; simulation residual current signal generating circuit is connected with microcontroller circuit with the control executive circuit.
2. the intelligent controller for circuit breakers of band residual current protecting according to claim 1; it is characterized in that described simulation residual current signal generating circuit is by metal-oxide-semiconductor V5; V6; resistance R 23; R24; R25; R40; capacitor C 8; bi-directional voltage stabilizing pipe FV2 and interface X8 form; 5 pin of single-chip microcomputer N3 in the one termination microcontroller circuit of resistance R 23; one end of the other end of resistance R 23 and resistance R 40; the G utmost point of metal-oxide-semiconductor V5; the G utmost point of metal-oxide-semiconductor V6 connects; the S utmost point of the other end of resistance R 40 and metal-oxide-semiconductor V5 meets power supply VCC; the end of the D utmost point connecting resistance R24 of the D utmost point of metal-oxide-semiconductor V5 and metal-oxide-semiconductor V6; the S utmost point ground connection of metal-oxide-semiconductor V6; the other end of resistance R 24 and capacitor C 8; resistance R 25; the end of bi-directional voltage stabilizing pipe FV2 is connected with 2 pin of interface X8; capacitor C 8; resistance R 25; the other end of bi-directional voltage stabilizing pipe FV2 and the port one of interface X8 meet reference voltage V ref, the K1 of interface X8 and residual current transformer testing coil; K2 holds connection.
3. the intelligent controller for circuit breakers of band residual current protecting according to claim 1; it is characterized in that described microcontroller circuit is by single-chip microcomputer N3; chip N4; N6; resistance R 13; R14; R22; crystal oscillator G1; capacitor C 6; C7; C9 and interface X7 form; resistance R 13; the end of R14 respectively with 1 of interface X7; 4 pin connect; resistance R 13; the other end of R14 respectively with 30 of single-chip microcomputer N3; 31 pin connect; 10 pin of single-chip microcomputer N3 are connected with an end of the end of crystal oscillator G1 and capacitor C 6; 8 pin of single-chip microcomputer N3 are connected with an end of the other end of crystal oscillator G1 and capacitor C 7; 2 pin of chip N4 are connected with 7 pin of single-chip microcomputer N3 with an end of resistance R 22; 2 pin of chip N6 are connected with 46 pin of single-chip microcomputer N3 with an end of capacitor C 9; 2 pin of interface X7; 3 of chip N4; 4 pin; 11 of 1 pin of chip N6 and single-chip microcomputer N3; 47 pin meet power supply VCC jointly; 3 pin of interface X7; capacitor C 6; C7; the other end of C9; the other end of resistance R 22; 1 pin of chip N4; 9 of 3 pin of chip N6 and single-chip microcomputer N3; 14 pin common grounds, interface X7 connects host computer.
4. the intelligent controller for circuit breakers of band residual current protecting according to claim 1; it is characterized in that described residual current signal sampling amplifying circuit is by resistance R 1-R5; capacitor C 12-C16; bidirectional diode VD2; amplifier N1 and interface X1 form; resistance R 1; R2; capacitor C 12; C13; the end of bidirectional diode VD2 is connected with 2 pin of interface X1; resistance R 1; capacitor C 13; the other end of bidirectional diode VD2; resistance R 3; one end of capacitor C 14 and 1 pin of interface X1 meet reference voltage V ref; the other end of resistance R 2 and resistance R 4; 13 pin of one termination amplifier N1 of capacitor C 15; 12 pin of another termination amplifier N1 of resistance R 3; resistance R 4; 14 pin of one termination amplifier N1 of the other end of capacitor C 15 and resistance R 5; 45 pin of single-chip microcomputer N3 in the one termination microcontroller circuit of the other end of resistance R 5 and capacitor C 16; capacitor C 12; C14; the other end common ground of C16, interface X1 and residual current transformer are measured the S1 of coil; S2 holds connection.
5. the intelligent controller for circuit breakers of band residual current protecting according to claim 1; it is characterized in that described load running voltage sample amplifying circuit is by resistance R 7-R12; bidirectional diode VD1; amplifier N1 and interface X2 form; resistance R 7; the end of R9 respectively with 2 of interface X2; 1 pin connects; interface X2 is connected with load terminal voltage; resistance R 7; the other end of R9 respectively with resistance R 8; the end of R10 connects; the end of the other end of resistance R 8 and bidirectional diode VD1; one end of resistance R 11 is connected with 9 pin of amplifier N1; 8 pin of the other end of resistance R 11 and amplifier N1 connect that 39 pin of single-chip microcomputer N3 are connected in the microcontroller circuit; the other end of resistance R 10; 10 pin of one termination amplifier N1 of the other end of bidirectional diode VD1 and resistance R 12, another termination reference voltage V ref of resistance R 12.
6. the intelligent controller for circuit breakers of band residual current protecting according to claim 1; it is characterized in that described load running current signal sampling amplifying circuit is by resistance R 15-R20; capacitor C 1; C3; amplifier N1 and interface X5 form; 2 pin of one termination interface X5 of resistance R 15; capacitor C 1; one end of resistance R 16 and 1 pin of interface X5 meet reference voltage V ref; but interface X5 is connected with the two ends of eating the Paderewski coil; resistance R 15; R16; 3 pin of another termination amplifier N1 of capacitor C 1; 4 pin of amplifier N1 meet power supply VCC; 1 of amplifier N1; the end of 2 pin connecting resistance R17; the other end of resistance R 17; 6 pin of one termination amplifier N1 of resistance R 19; the other end of resistance R 19; 7 pin of one termination amplifier N1 of resistance R 20; 43 pin of single-chip microcomputer N3 in the one termination microcontroller circuit of the other end of resistance R 20 and capacitor C 3; 5 pin of one termination amplifier N1 of resistance R 18; another termination reference voltage V ref of resistance R 18,11 pin of amplifier N1 and the other end common ground of capacitor C 3.
7. the intelligent controller for circuit breakers of band residual current protecting according to claim 1; it is characterized in that described power-supplying circuit is by diode VD3-VD8; capacitor C 4; C5; C10; bi-directional voltage stabilizing pipe FV1; rectifier bridge VB1; power module N7; N8 and interface X3; X4 forms; the negative electrode of diode VD3; 2 pin of the anode connection interface X3 of VD4; the negative electrode of diode VD5; 1 pin of the anode connection interface X3 of VD6; interface X3 is connected with the two ends of fast saturable inductor; diode VD4; the negative electrode of VD6 connects the anode of diode VD8; 2 pin of the termination interface X4 of 2 pin of rectifier bridge VB1 and bi-directional voltage stabilizing pipe FV1; 2 pin of the other end connection interface X4 of 3 pin of rectifier bridge VB1 and bi-directional voltage stabilizing pipe FV1; interface X4 is connected with accessory power supply; 1 pin of rectifier bridge VB1 connects the anode of diode VD7; diode VD7; one end output voltage V P of the negative electrode of VD8 and capacitor C 4 also connects 1 pin of power module N7; 3 pin of power module N7; one end of capacitor C 5 connects back out-put supply VCC; 1 pin of power module N8 meets power supply VCC; 2 pin of power module N8 are connected with an end of capacitor C 10 and output reference voltage Vref, 4 pin of rectifier bridge VB1; capacitor C 4; C5; the other end of C10; the 3 pin common grounds of 2 pin of power module N7 and power module N8.
8. the intelligent controller for circuit breakers of band residual current protecting according to claim 1; it is characterized in that described control executive circuit comprises trip circuit, display circuit, telecommunication circuit and relay drive circuit, trip circuit, display circuit, telecommunication circuit and relay drive circuit are connected with microcontroller circuit respectively.
9. the intelligent controller for circuit breakers of band residual current protecting according to claim 8; it is characterized in that described display circuit is by resistance R 26-R37; triode V1-V4; chip N5 and display screen E1 form; 2 of chip N5; 3; 4; 5; 6; 7; 8; 9 pin meet 14 of single-chip microcomputer N3 in the microcontroller circuit respectively; 15; 16; 17; 18; 19; 20; 21 pin; 12 of chip N5; 13; 14; 15; 16; 17; 18; 19 pin are connecting resistance R37 respectively; R36; R35; R34; R33; R32; R31; the end of R30; resistance R 30; R31; R32; R33; R34; R35; R36; the other end of R37 meets a of display screen E1 respectively; b; c; d; e; f; g; the dp pin; 11 pin of chip N5 meet power supply VCC; resistance R 26; R27; R28; in the termination microcontroller circuit of R29 22 of single-chip microcomputer N3; 23; 24; 25 pin; resistance R 26; R27; R28; the other end of R29 respectively with triode V1; V2; V3; the base stage of V4 connects; triode V1; V2; V3; the emitter of V4 respectively with the L1 of display screen E1; L2; L3; the L4 pin connects, 1 pin of chip N5 and triode V1; V2; V3; the collector electrode common ground of V4.
10. the intelligent controller for circuit breakers of band residual current protecting according to claim 8; it is characterized in that described trip circuit is by resistance R 38; R39; capacitor C 11; diode VD9; triode VT2; VT3 and interface X6 form; one end of resistance R 38 is connected with 32 pin of single-chip microcomputer N3 in the microcontroller circuit; the other end of resistance R 38 and resistance R 39; one end of capacitor C 11 is connected with the base stage of triode VT2; the emitter of triode VT2 connects the base stage of triode VT3; the anode of diode VD9 meets voltage VP; the negative electrode of diode VD9; triode VT2; 2 pin of the collector electrode connection interface X6 of VT3; resistance R 39; the other end of capacitor C 11; the 2 pin common grounds of the emitter of triode VT3 and interface X6, interface X5 is connected with the circuit breaker tripping coil.
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| CN2010206270213U CN201910385U (en) | 2010-11-25 | 2010-11-25 | Intelligent controller for breaker with residual current protection |
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2010
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102590591A (en) * | 2012-03-05 | 2012-07-18 | 常熟开关制造有限公司(原常熟开关厂） | Detection circuit for monitoring state of current transformer |
| CN102590591B (en) * | 2012-03-05 | 2016-08-17 | 常熟开关制造有限公司(原常熟开关厂） | The testing circuit of monitoring current transformer state |
| CN103852674A (en) * | 2012-11-30 | 2014-06-11 | 上海华建电力设备股份有限公司 | Residual current transformer secondary coil disconnection detection circuit |
| CN103490373A (en) * | 2013-09-06 | 2014-01-01 | 常熟开关制造有限公司(原常熟开关厂） | Method for preventing misoperation of breaker and breaker |
| CN103490373B (en) * | 2013-09-06 | 2016-08-17 | 常熟开关制造有限公司(原常熟开关厂） | A kind of method preventing breaker misoperation and a kind of breaker |
| CN104574770A (en) * | 2014-12-15 | 2015-04-29 | 江苏斯菲尔电气股份有限公司 | Electrical fire monitoring detector with fault detection circuit |
| CN106093826A (en) * | 2016-08-10 | 2016-11-09 | 李蕊名 | A kind of band air-gap iron core current transformer measurement structure |
| CN106093826B (en) * | 2016-08-10 | 2019-07-12 | 李蕊名 | A kind of band air-gap iron core current transformer measurement structure |
| CN110095682A (en) * | 2019-05-27 | 2019-08-06 | 云南电网有限责任公司电力科学研究院 | A kind of CT wire break detection method suitable for formula power electronic equipment can be presented |
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