CN202856303U

CN202856303U - Intelligent reclosing circuit breaker

Info

Publication number: CN202856303U
Application number: CN 201220580561
Authority: CN
Inventors: 陈星亮
Original assignee: ZHEJIANG XINGMING INTELLIGENT ELECTRICAL TECHNOLOGY Co Ltd
Current assignee: ZHEJIANG XINGMING INTELLIGENT ELECTRICAL TECHNOLOGY Co Ltd
Priority date: 2012-10-29
Filing date: 2012-10-29
Publication date: 2013-04-03
Anticipated expiration: 2022-10-29

Abstract

The utility model discloses an intelligent reclosing circuit breaker. The intelligent reclosing circuit breaker is mainly composed of a microcomputer controller, a current sensor, a leakage sensor, a special signal comparator, a storage circuit, a 485 communication circuit, an electromagnetic tripping device, a power supply circuit, a motor servo circuit, a matched accessory, a nixie display, etc. Main functions, such as conventional circuit breakers (fuses), contactors, overload (or overvoltage, leakage, etc.) protection relays, starters, isolators, etc., are integrated, the remote automatic control and local direct control functions can be realized, the panel display and signal alarm functions can be realized, functions, such as overvoltage protection, undervoltage protection, overcurrent protection, leakage protection, etc., can be realized, and advantages, such as small size, good reliability, good short-circuit breaking capacity, short flashover distance, etc., can be realized. The intelligent reclosing circuit breaker is applicable in a low-voltage power grid in which a three-phase four-wire neutral point direct grounding system (a TT grounding system) is adopted. The intelligent reclosing circuit breaker is used to provide indirect contact protection for human body electric shock hazards, and can also be used to prevent line or electricity grounding failures, the overcurrent failure, the short circuit failure, etc.

Description

The Intelligent reclosing circuit breaker

Technical field

The utility model relates to a kind of circuit breaker, refers in particular to a kind of Intelligent reclosing circuit breaker.

Background technology

Chinese patent once disclosed a kind of " autoreclose breaker " (notification number CN201332070Y, October 21 2009 day for announcing), comprise plastic feet, loam cake and upper cover, be arranged on input wires chip module, fixed contact, moving contact, rotating shaft and combined floodgate and tripping mechanism in base and the loam cake, on cover and also be provided with torch integrated operation mechanism and control circuit thereof.That Chinese patent once disclosed was a kind of " automatic recloser residual current circuit breaker with automatic adjustment electric leakage parameter function " (notification number CN201359981Y, December 9 2009 day for announcing), residual current circuit breaker inside has electric-leakage detection circuit and actuator's actuating circuit, motor-operating mechanism is fixed on the residual current circuit breaker outer seal, and controller is fixed on the motor-operating mechanism; At motor-operating mechanism slide block and motor are installed, slide block is stuck on the handle on the residual current circuit breaker, at controller microprocessor is set, push-button switch and code switch, microprocessor is electrically connected respectively push-button switch, coding switch circuit, electrically operated institution actuating circuit and light-emitting diode are also received four mouth lines respectively by four co-anode diodes on the pin of corresponding code switch, make residual current circuit breaker automatically adjust the setting of electric leakage parameter when the circuit decreasing insulating by programming, recover the power supply of circuit, exempted the trouble of artificial adjustment and after several hours, automatically returned to former electric leakage pre-set parameter.State's patent once disclosed a kind of " single-phase automatic recloser residual-current circuit breaker " (notification number CN201673879U, December 15 2010 day for announcing), include the circuit breaker that is installed in the base, its handle is exposed to outside the lid, display window is arranged on the capping, there are inlet wire post and outlet column in the shell two ends, surface-mounted integrated circuit and instrument transformer are installed in the shell, operating circuit is by rectification, filtering and voltage stabilizing circuit, signal amplification circuit, reclosing control circuit and sub-gate control circuit form, a micro processor controls Circuits System, handle is exposed to outside the middle cover, motor also is installed middle cover), motor is by connecting rod and crank connecting handle, on cover in addition divide-shut brake indicating arm through hole etc.

Summary of the invention

The purpose of this utility model is to provide a kind of Intelligent reclosing circuit breaker; the major functions such as traditional circuit breaker (fuse), contactor, overload (or overvoltage, electric leakage etc.) protection relay, starter, isolator that it is integrated; have far distance automatic controlling and local direct control function; have Display panel and signal alarm function; have the functions such as overvoltage protection, under-voltage protection, overcurrent protection, earth leakage protective, have the advantages such as volume is little, reliability is high, short circuit breaking capacity is strong, flashover distance is short.Be applicable to the low voltage electric network of three-phase and four-line neutral-point solid ground (TT grounding system).Be used for providing indirect contact protection to personal Danger Electric shock risk, also can protect the earth fault of circuit or electricity consumption, overcurrent, short circuit etc.

For achieving the above object, the solution that the utility model is taked is: a kind of Intelligent reclosing circuit breaker, it comprises accessory kit and power-supplying circuit, power-supplying circuit and model are that the microcomputer controller IC1 of UPD78F0411 is connected, zero sequence current sensor LCT has the winding L of detection D and test winding L T, the CTA of current sensor CT connects 6 pin that model is the special signal comparator IC5 of LM324 by resistance R 21, CTB connects 9 pin of special signal comparator IC5 by resistance R 25, CTC connects 13 pin of special signal comparator IC5 by resistance R 29, the detection winding L D of zero sequence current sensor connects 2 pin of special signal comparator IC5 by resistance R 17, test winding L T is through 4 pin of switch LDCHK by resistance R 15 to microcomputer controller IC1, another road is to 3 pin of microcomputer controller IC1,18 pin of microcomputer controller IC1,19 pin connect 5 pin that model is the memory circuit IC2 of AT24C02A, 6 pin; 23 pin of microcomputer controller IC1,24 pin connect 1 pin, 4 pin that model is the 485 communicating circuit IC3 of MAX3085; 43 pin of microcomputer controller IC1 connect the base stage of triode T3 by resistance R 34, and the collector electrode of triode T3 meets motor relay coil MOTON, start-up capacitance CB3 one termination motor relay MOT, and the other end is received voltage detecting port UA1 by K switch W; Magnetictrip CM1 connects 37 pin of microcomputer controller IC1, meets instrument transformer PT by resistance R 45, connects electromagnetism through resistance R J4 and takes off device CM1; 45 pin of microcomputer controller IC1 are through 2 pin of resistance R 43, triode T4 device BUZZ taking alarm, and 1 pin of alarm BUZZ is received power supply VMCU through resistance R 44; Nixie display LED5641 is the drive circuit IC4 of TM1620 to model by 15 pin, 16 pin, 17 pin of microcomputer controller IC1.

The control principle of this Intelligent reclosing circuit breaker is summarized as follows: the CTA phase that current sensor CT collects, the CTB phase, CTC phase three-phase current signal divides and is clipped to 6 pin that model is the special signal comparator IC5 of LM324,9 pin, 13 pin, special signal comparator IC5 carries out logical process respectively from 1 pin, 7 pin, 8 pin, the output of 14 pin, through the ADCLD road, the ADCIA road, the ADCIB road, the ADCIC road is to microcomputer controller IC1, the zero sequence electric leakage signal that the detection winding L D of zero sequence current sensor LCT collects is to 2 pin and 3 pin of special signal comparator IC5, and the leak(age) test signal that the test winding L T of zero sequence current sensor collects arrives microcomputer controller IC1 through switch LDCHK by resistance R 15; 18 pin of microcomputer controller IC1,19 pin output signals arrive 5 pin, 6 pin of memory circuit IC2; 23 pin of microcomputer controller IC1,24 pin output signals are to 1 pin, 4 pin of 485 communicating circuit IC3,6 pin of 485 communicating circuit IC3,7 pin outputting communication signal A, communication signal B; The signal of motor servo circuit is from the 43 pin output of microcomputer controller IC1, by resistance R 34, base stage through triode T3, collector electrode output from triode T3, control motor relay MOT, start-up capacitance CB3 one termination motor relay coil MOTON, the other end is received voltage detecting port UA1 by K switch W; Magnetictrip CM1 one tunnel connected the 37 pin output signals that trip coil RLYOFF connects on the power supply N point, microcomputer controller IC1 is passed through on another road, by resistance R 45, PT is elementary through instrument transformer, PT level of instrument transformer output signal, control electromagnetism through resistance R J4 and take off device CM1, the 45 pin output alarm signals of microcomputer controller IC1, base stage through resistance R 43, triode T4,2 pin from the collector electrode of triode T4 to alarm BUZZ are received power supply VMCU to 1 pin of alarm BUZZ through resistance R 44; 15 pin of nixie display LED5641 by microcomputer controller IC1,16 pin, 17 pin output signals are processed by drive circuit IC4 to 18 pin, 19 pin, 20 pin of drive circuit IC4, drive the LED luminescence display of nixie display LED5641.

It adopts intelligent means; the integrated major functions such as traditional circuit breaker (fuse), contactor, overload (or overvoltage, electric leakage etc.) protection relay, starter, isolator; have far distance automatic controlling and local direct control function; have Display panel and signal alarm function; have the functions such as overvoltage protection, under-voltage protection, overcurrent protection, earth leakage protective, have the advantages such as volume is little, reliability is high, short circuit breaking capacity is strong, flashover distance is short.Be applicable to the low voltage electric network of three-phase and four-line neutral-point solid ground (TT grounding system).Be used for providing indirect contact protection to personal Danger Electric shock risk, also can protect the earth fault of circuit or electricity consumption, overcurrent, short circuit etc.

Description of drawings

Fig. 1 is the electrical principle frame diagram of present embodiment.

Fig. 2 is the microcomputer controller circuit of present embodiment.

Fig. 3 is the signal sampling circuit figure of present embodiment.

Fig. 4 is the memory circuit of present embodiment.

Fig. 5 is 485 communicating circuits of present embodiment.

Fig. 6 is the nixie display circuit of present embodiment.

Fig. 7 is the motor servo circuit of present embodiment.

Fig. 8 is the power-supplying circuit of present embodiment.

Among Fig. 1: 1, accessory kit, 2, power-supplying circuit, 3, the motor servo circuit.

Embodiment

Below in conjunction with embodiment and accompanying drawing thereof the utility model is remake description.

Referring to Fig. 1-Fig. 8, a kind of Intelligent reclosing circuit breaker, it comprises accessory kit 1 and power-supplying circuit 2, power-supplying circuit 2 and model are that the microcomputer controller IC1 of UPD78F0411 is connected, zero sequence current sensor LCT has the winding L of detection D and test winding L T, the CTA of current sensor CT connects 6 pin that model is the special signal comparator IC5 of LM324 by resistance R 21, CTB connects 9 pin of special signal comparator IC5 by resistance R 25, CTC connects 13 pin of special signal comparator IC5 by resistance R 29, the detection winding L D of zero sequence current sensor connects 2 pin of special signal comparator IC5 by resistance R 17, test winding L T is through 4 pin of switch LDCHK by resistance R 15 to microcomputer controller IC1, another road is to 3 pin of microcomputer controller IC1,18 pin of microcomputer controller IC1,19 pin connect 5 pin that model is the memory circuit IC2 of AT24C02A, 6 pin; 23 pin of microcomputer controller IC1,24 pin connect 1 pin, 4 pin that model is the 485 communicating circuit IC3 of MAX3085; 43 pin of microcomputer controller IC1 connect the base stage of triode T3 by resistance R 34, and the collector electrode of triode T3 meets motor relay coil MOTON, start-up capacitance CB3 one termination motor relay MOT, and the other end is received voltage detecting port UA1 by K switch W; Magnetictrip CM1 connects 37 pin of microcomputer controller IC1, meets instrument transformer PT by resistance R 45, connects electromagnetism through resistance R J4 and takes off device CM1; 45 pin of microcomputer controller IC1 are through 2 pin of resistance R 43, triode T4 device BUZZ taking alarm, and 1 pin of alarm BUZZ is received power supply VMCU through resistance R 44; Nixie display LED5641 is the drive circuit IC4 of TM1620 to model by 15 pin, 16 pin, 17 pin of microcomputer controller IC1.

Referring to Fig. 2, the 6 pin connecting resistance R1 of described microcomputer controller IC1 and

capacitor C

1,12 pin connect power supply power supply VREG and

capacitor C

2,13 pin ground connection and capacitor C 2 other ends, 36 pin ground connection, resistance R 1 another termination power VMCU, capacitor C 1 other end ground connection.

Referring to Fig. 3,1 pin of described special signal comparator IC5 connects diode D1 anode, 2 pin are connecting resistance R18 also, 3 pin connect 5 pin, capacitor C 5, capacitor C 4, resistance R 20, detect winding L D and ground connection, 4 pin meet power supply VMCU, 6 pin are connecting resistance R22 also, 7 pin connect diode D2 anode, 8 pin connect diode D1 anode, 9 pin are connecting resistance R26 also, 10 pin connect 11 pin, 12 pin, capacitor C 6, capacitor C 7, resistance R 24, resistance R 28 and ground connection, 13 pin are connecting resistance R30 also, and 14 pin connect diode D4 anode, the diode D1 negative terminal connecting resistance R18 other end and resistance R 19, the diode D2 negative terminal connecting resistance R22 other end and resistance R 23, the diode D3 negative terminal connecting resistance R26 other end and resistance R 27, the diode D4 negative terminal connecting resistance R30 other end and resistance R 31.

Referring to Fig. 4,1 pin of described memory circuit IC2 connects 2 pin, 3 pin, 4 pin, 7 pin, capacitor C 3 and ground connection, and 5 pin are connecting resistance R6 also, and 6 pin are connecting resistance R5 also, the 8 pin connecting resistance R6 other ends, resistance R 5 other ends, capacitor C 3 other ends, power supply VMCU.

Referring to Fig. 5,1 pin of described 485 communicating circuit IC3 is connecting resistance R39 also, 2 pin connect 3 pin, triode T1 collector electrode,

resistance R

42,4 pin are connecting resistance R41, resistance R 40 also, the 5 pin connecting resistance R42 other end and ground connection, 6 pin and 7 pin are connected respectively 1 pin and 2 pin of communication interface RS485, and 8 pin meet triode T1 emitter, resistance R 39 other ends, resistance R 40 other ends, power supply VMCU.

Referring to Fig. 6, described resistance R 34 is gone back connecting resistance R35, the collector electrode of described triode T3 also connects diode D6 anode, diode D6 negative terminal connecting resistance RJ2 and the motor relay coil MOTON other end, the described start-up capacitance CB3 other end also meets adjustable resistance RV, the coil RLYOFF one terminating resistor RJ1 of described magnetictrip CM1, diode D5 negative terminal, another terminating diode D5 anode, triode T2 collector electrode, triode T2 base stage connecting resistance R32, resistance R 33,1 pin of described instrument transformer PT connects diode D7 anode, 2 pin connect capacitor C D3 negative terminal, capacitor C 10, resistance R 14 and ground connection, 4 pin connecting resistance RJ4.

Referring to Fig. 6,1 pin of described drive circuit IC4 meets power supply VMCU, and 12 pin connect 15 pin, resistance R 37 and ground connection, and 18 pin, 19 pin, 20 pin are connecting resistance R4, resistance R 3, resistance R 2 respectively.

Claims

1. Intelligent reclosing circuit breaker, it comprises accessory kit (1) and power-supplying circuit (2), it is characterized in that: power-supplying circuit (2) and model are that the microcomputer controller IC1 of UPD78F0411 is connected, zero sequence current sensor LCT has the winding L of detection D and test winding L T, the CTA of current sensor CT connects 6 pin that model is the special signal comparator IC5 of LM324 by resistance R 21, CTB connects 9 pin of special signal comparator IC5 by resistance R 25, CTC connects 13 pin of special signal comparator IC5 by resistance R 29, the detection winding L D of zero sequence current sensor connects 2 pin of special signal comparator IC5 by resistance R 17, test winding L T is through 4 pin of switch LDCHK by resistance R 15 to microcomputer controller IC1, another road is to 3 pin of microcomputer controller IC1,18 pin of microcomputer controller IC1,19 pin connect 5 pin that model is the memory circuit IC2 of AT24C02A, 6 pin; 23 pin of microcomputer controller IC1,24 pin connect 1 pin, 4 pin that model is the 485 communicating circuit IC3 of MAX3085; 43 pin of microcomputer controller IC1 connect the base stage of triode T3 by resistance R 34, and the collector electrode of triode T3 meets motor relay coil MOTON, start-up capacitance CB3 one termination motor relay MOT, and the other end is received voltage detecting port UA1 by K switch W; Magnetictrip CM1 connects 37 pin of microcomputer controller IC1, meets instrument transformer PT by resistance R 45, connects electromagnetism through resistance R J4 and takes off device CM1; 45 pin of microcomputer controller IC1 are through 2 pin of resistance R 43, triode T4 device BUZZ taking alarm, and 1 pin of alarm BUZZ is received power supply VMCU through resistance R 44; Nixie display LED5641 is the drive circuit IC4 of TM1620 to model by 15 pin, 16 pin, 17 pin of microcomputer controller IC1.

2. Intelligent reclosing circuit breaker according to claim 1, it is characterized in that: 6 pin connecting resistance R1 and the capacitor C 1 of described microcomputer controller IC1,12 pin connect power supply power supply VREG and capacitor C 2,13 pin ground connection and capacitor C 2 other ends, 36 pin ground connection, resistance R 1 another termination power VMCU, capacitor C 1 other end ground connection.

3. Intelligent reclosing circuit breaker according to claim 1, it is characterized in that: 1 pin of described special signal comparator IC5 connects diode D1 anode, 2 pin are connecting resistance R18 also, 3 pin connect 5 pin, capacitor C 5, capacitor C 4, resistance R 20, detect winding L D and ground connection, 4 pin meet power supply VMCU, 6 pin are connecting resistance R22 also, 7 pin connect diode D2 anode, 8 pin connect diode D1 anode, 9 pin are connecting resistance R26 also, 10 pin connect 11 pin, 12 pin, capacitor C 6, capacitor C 7, resistance R 24, resistance R 28 and ground connection, 13 pin are connecting resistance R30 also, and 14 pin connect diode D4 anode, the diode D1 negative terminal connecting resistance R18 other end and resistance R 19, the diode D2 negative terminal connecting resistance R22 other end and resistance R 23, the diode D3 negative terminal connecting resistance R26 other end and resistance R 27, the diode D4 negative terminal connecting resistance R30 other end and resistance R 31.

4. Intelligent reclosing circuit breaker according to claim 1, it is characterized in that: 1 pin of described memory circuit IC2 connects 2 pin, 3 pin, 4 pin, 7 pin, capacitor C 3 and ground connection, 5 pin are connecting resistance R6 also, 6 pin are connecting resistance R5 also, the 8 pin connecting resistance R6 other ends, resistance R 5 other ends, capacitor C 3 other ends, power supply VMCU.

5. Intelligent reclosing circuit breaker according to claim 1, it is characterized in that: 1 pin of described 485 communicating circuit IC3 is connecting resistance R39 also, 2 pin connect 3 pin, triode T1 collector electrode, resistance R 42,4 pin are connecting resistance R41, resistance R 40 also, the 5 pin connecting resistance R42 other end and ground connection, 6 pin and 7 pin are connected respectively 1 pin and 2 pin of communication interface RS485, and 8 pin meet triode T1 emitter, resistance R 39 other ends, resistance R 40 other ends, power supply VMCU.

6. Intelligent reclosing circuit breaker according to claim 1, it is characterized in that: described resistance R 34 is gone back connecting resistance R35, the collector electrode of described triode T3 also connects diode D6 anode, diode D6 negative terminal connecting resistance RJ2 and the motor relay coil MOTON other end, the described start-up capacitance CB3 other end also meets adjustable resistance RV, the coil RLYOFF one terminating resistor RJ1 of described magnetictrip CM1, diode D5 negative terminal, another terminating diode D5 anode, triode T2 collector electrode, triode T2 base stage connecting resistance R32, resistance R 33,1 pin of described instrument transformer PT connects diode D7 anode, 2 pin connect capacitor C D3 negative terminal, capacitor C 10, resistance R 14 and ground connection, 4 pin connecting resistance RJ4.

7. Intelligent reclosing circuit breaker according to claim 1, it is characterized in that: 1 pin of described drive circuit IC4 meets power supply VMCU, and 12 pin connect 15 pin, resistance R 37 and ground connection, and 18 pin, 19 pin, 20 pin are connecting resistance R4, resistance R 3, resistance R 2 respectively.