CN202586269U - AFCI comprehensive protection device - Google Patents
AFCI comprehensive protection device Download PDFInfo
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- CN202586269U CN202586269U CN 201220172780 CN201220172780U CN202586269U CN 202586269 U CN202586269 U CN 202586269U CN 201220172780 CN201220172780 CN 201220172780 CN 201220172780 U CN201220172780 U CN 201220172780U CN 202586269 U CN202586269 U CN 202586269U
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Abstract
The utility model relates to an AFCI comprehensive protection device, comprising a phase-voltage collection circuit, a current-waveform detection circuit and a microprocessor control circuit. An output signal of the phase-voltage collection circuit is transmitted to the microprocessor control circuit by a voltage comparison circuit and an under-voltage comparison circuit respectively. An output signal of the current-waveform detection circuit is transmitted to the microprocessor control circuit by a voltage-follower circuit, a signal amplification circuit and an A/D data switching circuit in turn. Signal control of an output signal of the microprocessor control circuit is sent to an interrupt-device drive circuit and a 485 communication interface circuit. An output signal of the 485 communication interface circuit is sent to a PC machine. The device can detect collection, determination and control of electrical fault signals such as excess voltage, under voltage and fault arc of a power supply line in real time on line, protect safety of the electrical line relatively fully, prevent electrical fire effectively and guarantee people's life and property safety.
Description
Technical field
The utility model relates to a kind of protective device, particularly be a kind of AFCI comprehensive protector.
Background technology
Under the single phase power supply situation,, will cause the too high or under voltage of phase voltage because power supply administration's transformer output overvoltage is too high or disconnected zero situation of chamber main line distribution system; Finally cause power devices overvoltage/undervoltage fault, household electrical appliance such as refrigerator or air conditioner are under-voltage because of phase voltage, can make compressor can not rotate the back and produce fault or catch fire; And overtension can produce the electric equipment damage; Even the breaking out of fire accident, but in breaking out of fire, owing to electric wiring exists, former thereby generation high-temperature electric arcs such as lead aging, cable joint loose contact bad because of termination contact; Finally cause fire, it is more to account for fire cause sum ratio.
Electric arc is a kind of gas discharge phenomenon, and electric current is through moment spark that some dielectric produced.Point out in the report of United States Fire Administration that the fire that the wiring of household electrical appliance causes is the twice that electric equipment causes fire, wherein topmost a kind of to cause the reason of fire be fault electric arc.
Be generally the circuit breaker that prevents short circuit design and can't detect this type of fault, effective method is to adopt " arc-fault circuit interrupter (AFCI, Arc Fault Circuit Interrupter) ", and it can detect whether there is electric arc, then takes short-circuit protection if having.
Summary of the invention
The purpose of the utility model is to provide a kind of AFCI comprehensive protector of the electrical fire of effectively improving the precaution.
The utility model solves the technical scheme that its technical problem adopted: a kind of AFCI comprehensive protector; Comprise phase voltage Acquisition Circuit, current waveform testing circuit and microprocessor control circuit; The output signal of said phase voltage Acquisition Circuit transfers to microprocessor control circuit through voltage comparator circuit, under voltage comparison circuit respectively; The output signal of said current waveform testing circuit successively through voltage follower circuit, signal amplification circuit, D data converting circuit transfer to microprocessor control circuit; The output signal control of said microprocessor control circuit is sent to breaker device drive circuit and 485 communication interface circuits, and the output signal of said 485 communication interface circuits sends to PC.
The output in the phase voltage loop that said phase voltage Acquisition Circuit is made up of L, N is after transformer BT is connected to diode D1-D4 bridge rectifier, capacitor C1, C2 filter circuit, and its direct voltage divides two-way to be input to the input of voltage stabilizing integration module IC1 respectively.
Said current waveform testing circuit by pass the output of phase line with the current transformer TR1 of the neutral line be connected the parallel connection shunt resistance 1R1 and divider resistance 1R2 constitute.
Said voltage follower circuit is made up of output connection feedback resistance 1R4 and the pull down resistor 1R5 of operational amplifier IC3/A.
Said signal amplification circuit is made up of the output connection filtering capacitor C7 of operational amplifier IC3/B.
Said 485 communication interface circuits are connected to the COM port of RS485 communication interface through the output of SN75176 communication interface chip IC5.
Through adopting above-mentioned technical scheme; The beneficial effect of the utility model is: the utility model adopts microprocessor control circuit as core control system; As the supply power voltage signal acquisition circuit, control the fault that breaker device protection power consumption equipment produces because of overtension by the phase voltage Acquisition Circuit; The current waveform testing circuit is earlier to the current signal acquisition sampled signal of sampling; From sampled signal, isolate HFS again; Identify electric arc and write down the number of times that electric arc occurs through the energy jump that detects this HFS then; Whole process uses the PC data recovery to compare, write down, analyze the characteristic of arc current when electric arc takes place, and the difference that exists with normal arc changes, and PC has characteristics such as memory data output is big, check and correction is accurate, stable, quick; The existence that can more in time detect fault electric arc whether; Avoided the generation of misoperation to a great extent,, the detection of arc fault and the design of arc-fault circuit interrupter thereof have been had directive function for the detection of fault electric arc provides effective solution.
This utility model can real-time online detects collection, judgement, the control of electric fault signals such as supply line's overvoltage, under-voltage, fault electric arc; Omnibearing protection electric wiring safety more; Take precautions against electrical fire effectively, ensured people's life, property safety.
Description of drawings
Fig. 1 is the frame assumption diagram of the utility model;
Fig. 2 is the circuit theory diagrams of the utility model.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is done further to describe.
Like Fig. 1, shown in Figure 2; A kind of AFCI comprehensive protector of the utility model; Comprise phase voltage Acquisition Circuit 1, current waveform testing circuit 2 and microprocessor control circuit 3; The output signal of said phase voltage Acquisition Circuit 1 transfers to microprocessor control circuit 3 through voltage comparator circuit 11, under voltage comparison circuit 12 respectively; The output signal of said current waveform testing circuit 2 successively through voltage follower circuit 21, signal amplification circuit 22, D data converting circuit 23 transfer to microprocessor control circuit 3; The output signal control of said microprocessor control circuit 3 is sent to breaker device drive circuit 31 and 485 communication interface circuits 32, and the output signal of said 485 communication interface circuits 32 sends to PC 33.
The output in the phase voltage loop that said phase voltage Acquisition Circuit 1 is made up of L, N is after transformer BT is connected to diode D1-D4 bridge rectifier, capacitor C1, C2 filter circuit, and its direct voltage divides two-way to be input to the input of voltage stabilizing integration module IC1 respectively.
The phase voltage loop normal value that is made up of L, N is at the AC220V state; The secondary output AC voltage of transformer BT is about 8V; After diode D1-D4 bridge rectifier, capacitor C1, C2 filtering; This direct voltage divides two-way to be input to the 1st pin of voltage stabilizing integration module IC1 respectively; Output 5V power supply is supplied with local circuit and is that comparator module IC2/A, IC2/B provide the reference comparison voltages value after the inner voltage stabilizing of voltage stabilizing integration module IC1 is handled, and the in-phase end that is input to comparator module IC2/A, IC2/B is adjusted on another road respectively through potentiometer W1, W2.
The phase voltage loop normal value that constitutes as L, N is during at AC280V; The secondary output AC voltage of transformer BT is about 11V, and its rectification output signal is input to comparator module IC2/A, IC2/B the 3rd, 6 pin after potentiometer W1, W2 adjust respectively, and the 2nd, 5 pin with comparator module IC2/A, IC2/B carry out voltage ratio respectively; The 5th, 6,7 pin of comparator module IC2/B and its peripheral cell are formed overvoltage comparison circuit 11; When the 6th pin voltage of comparator module IC2/B during, comparator module IC2/B interior overturn, be input to the 38th pin of microprocessor U1 through resistance R 3 current limlitings by its 7th pin output high level greater than its 5th pin voltage reference value; After microprocessor U1 internal judgment is handled; The 8th pin output high level signal by microprocessor U1 makes triode Q1 conducting, relay J adhesive through resistance R 6 current limlitings; Its contact J1-1 transfers normal battle to by normally closed point, and breaker device power failure tripping protection power consumption equipment is because of the overtension fault.
When the phase voltage loop that is made up of L, N returns to 260V when following from AC280V; The secondary output AC voltage of transformer BT is about 9V; After diode D1-D4 bridge rectifier, capacitor C1, C2 filtering; The 7th pin of comparator module IC2/B is output as low level, after microprocessor U1 internal processor is judged, is judged as normal condition.
The phase voltage loop normal value that constitutes as L, N is during at AC150V, and the secondary output AC voltage of transformer BT is about 5V, and its rectification output signal is input to the 3rd, 6 pin of comparator module IC2/A, IC2/B after potentiometer W1, W2 adjust respectively; The 2nd, 5 pin with comparator module IC2/A, IC2/B carry out voltage ratio respectively; The 3rd, 2,1 pin of comparator module IC2/A and its peripheral cell are formed under voltage comparison circuit 12, when the 2nd pin voltage of comparator module IC2/A during greater than its 3rd pin voltage reference value, and comparator module IC2/A interior overturn; Be input to the 36th pin of microprocessor U1 through resistance R 2 current limlitings by the 1st pin output high level of comparator module IC2/A; After microprocessor U1 internal processor is judged, by the 8th pin output high level signal of microprocessor U1, through resistance R 6 current limlitings; Make triode Q1 conducting; The relay J adhesive, its contact J1-1 transfers normal battle to by normally closed point, and breaker device power failure tripping protection power consumption equipment is because of the overtension fault.
When the phase voltage loop that is made up of L, N returns to 180V when following from AC150V; The secondary output AC voltage of transformer BT is about 7V; After diode D1-D4 bridge rectifier, capacitor C1, C2 filtering; The 1st pin of comparator module IC2/A is output as low level, after microprocessor U1 internal processor is judged, is judged as normal condition.
Said current waveform testing circuit 2 by pass the output of phase line with the current transformer TR1 of the neutral line be connected the parallel connection shunt resistance 1R1 and divider resistance 1R2 constitute; Current transformer TR1 detects the different current patterns information of current waveform in real time as gathering arc current waveform signal in the circuit.After this signal output, after resistance 1R1 shunting, resistance 1R2 dividing potential drop, be input to the 2nd pin of operational amplifier IC3/A; The 1st pin of operational amplifier IC3/A connects feedback resistance 1R4 and pull down resistor 1R5 constitutes voltage follower circuit 21; After it collected the continuous current waveform that changes of electric circuit, this signal was after the 5th pin input of operational amplifier IC3/B, after operational amplifier IC3/B internal signal amplifies; The 7th pin output amplifying signal by operational amplifier IC3/B; After capacitor C 7 filtering, this signal be input to D the 2nd pin of data transaction chip IC 4, by D the 5th, 6,7 pin and the microprocessor U1 of data transaction chip IC 4 form datel circuit; Through microprocessor U1 read D the data-signal of data transaction chip IC 4; This signal is after microprocessor U1 identification, and through constantly scanning and judgement contrast of microprocessor U1, the original arc data information bank that is stored among this machine ROM carries out the in-circuit emulation contrast.After microprocessor U1 processor is judged and compared analysis with these data, carry out emulation and read, deposit, generate database, after judging by microprocessor U1 is comprehensive; Divide two-way to send control signal, first via output is by the 8th pin output high level signal of microprocessor U1; Through resistance R 6 current limlitings, make triode Q1 conducting, the relay J adhesive; Breaker device gets electric and threads off, protection electric wiring safety; The second tunnel output is sent data message by microprocessor U1 to SN75176 communication interface chip IC5; After SN75176 communication interface chip IC5 decoding conversion; Transfer two buses to by the 6th, 7 pin of SN75176 communication interface chip IC5 and be connected to PC, send alert data information to PC, PC shows current fault electric arc state; Collection, judgement, the control of electric fault signals such as the overvoltage of the online detection of real-time synthetic supply line, under-voltage, fault electric arc; Omnibearing protection electric wiring safety more, the electrical fire of effectively improving the precaution has ensured people's life, property safety.
An above-described preferred embodiment that is merely the utility model can not limit the scope that the utility model is implemented, and every equalization of being done according to the utility model claim changes and decorates, and all should still belong in the scope that the utility model contains.
Claims (6)
1. AFCI comprehensive protector; It is characterized in that: comprise phase voltage Acquisition Circuit (1), current waveform testing circuit (2) and microprocessor control circuit (3); The output signal of said phase voltage Acquisition Circuit (1) passes through voltage comparator circuit (11) respectively, under voltage comparison circuit (12) transfers to microprocessor control circuit (3); The output signal of said current waveform testing circuit (2) successively through voltage follower circuit (21), signal amplification circuit (22), D data converting circuit (23) transfer to microprocessor control circuit (3); The output signal control of said microprocessor control circuit (3) is sent to breaker device drive circuit (31) and 485 communication interface circuits (32), and the output signal of said 485 communication interface circuits (32) sends to PC (33).
2. AFCI comprehensive protector according to claim 1; It is characterized in that: the output in the phase voltage loop that said phase voltage Acquisition Circuit (1) is made up of L, N is after transformer BT is connected to diode D1-D4 bridge rectifier, capacitor C1, C2 filter circuit, and its direct voltage divides two-way to be input to the input of voltage stabilizing integration module IC1 respectively.
3. AFCI comprehensive protector according to claim 1 and 2 is characterized in that: said current waveform testing circuit (2) by pass the output of phase line with the current transformer TR1 of the neutral line be connected the parallel connection shunt resistance 1R1 and divider resistance 1R2 constitute.
4. AFCI comprehensive protector according to claim 1 and 2 is characterized in that: said voltage follower circuit (21) is made up of output connection feedback resistance 1R4 and the pull down resistor 1R5 of operational amplifier IC3/A.
5. AFCI comprehensive protector according to claim 1 and 2 is characterized in that: said signal amplification circuit (22) is made up of the output connection filtering capacitor C7 of operational amplifier IC3/B.
6. AFCI comprehensive protector according to claim 1 and 2 is characterized in that: said 485 communication interface circuits (32) are connected to the COM port of RS485 communication interface through the output of SN75176 communication interface chip IC5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220172780 CN202586269U (en) | 2012-04-23 | 2012-04-23 | AFCI comprehensive protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220172780 CN202586269U (en) | 2012-04-23 | 2012-04-23 | AFCI comprehensive protection device |
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| Publication Number | Publication Date |
|---|---|
| CN202586269U true CN202586269U (en) | 2012-12-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220172780 Expired - Fee Related CN202586269U (en) | 2012-04-23 | 2012-04-23 | AFCI comprehensive protection device |
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| CN (1) | CN202586269U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103378581A (en) * | 2012-04-23 | 2013-10-30 | 福建俊豪电子有限公司 | AFCI comprehensive protecting device |
-
2012
- 2012-04-23 CN CN 201220172780 patent/CN202586269U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103378581A (en) * | 2012-04-23 | 2013-10-30 | 福建俊豪电子有限公司 | AFCI comprehensive protecting device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121205 Termination date: 20130423 |