CN201378730Y - Power circuit breaker protective circuit - Google Patents
Power circuit breaker protective circuit Download PDFInfo
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- CN201378730Y CN201378730Y CN200820230830U CN200820230830U CN201378730Y CN 201378730 Y CN201378730 Y CN 201378730Y CN 200820230830 U CN200820230830 U CN 200820230830U CN 200820230830 U CN200820230830 U CN 200820230830U CN 201378730 Y CN201378730 Y CN 201378730Y
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Abstract
The utility model relates to a power circuit breaker protective circuit, which comprises a current sampling circuit, a voltage sampling circuit, an electric leakage sampling circuit, a power supply circuit, a signal processing circuit, a fault memory circuit and a release driving circuit. The output end of the power supply circuit is connected with the power input end of the signal processing circuit, the fault memory circuit and the release driving circuit. The signal output ends of the current sampling circuit, the voltage sampling circuit and the electric leakage sampling circuit are respectively connected with the current sampling signal input end, the voltage sampling signal input end and the electric leakage sampling signal input end of the signal processing circuit. The fault information output end of the signal processing circuit is connected with the signal input end of the fault memory circuit. The open circuit control signal output end of the signal processing circuit is connected with the control signal input end of the release driving circuit. Compared with the prior art, the utility model has the advantages of multiple functions and high stability and provides overall protection for lines and electric devices.
Description
Technical field
The utility model relates to the power supply unit technical field, relates in particular to a kind of power supply breaker protection circuit.
Background technology
At present, the three-phase four-wire system power transmission mode has many good qualities, but when faults such as loose contact, broken string occurring when the neutral line, can make that the neutral line loses clamping action, cause the voltage of single-phase load side to raise, this has very big threat for single-phase electric devices, tends to cause single-phase electric devices to burn even causes fire.For circuit, power consumption equipment are protected, need circuit breaker that overcurrent, creepage protection function are arranged simultaneously toward contact.
Current known power supply breaker protection circuit mostly is made up of elements such as transistors, and circuit function is few, volume is big, reliability is poor, can not provide comprehensive protection to circuit, power consumption equipment.
The utility model content
The purpose of this utility model provides a kind of power supply breaker protection circuit with voltage, electric current, leakage current signal monitoring, control outage.
A kind of power supply breaker protection circuit; wherein: this power supply breaker protection circuit also comprises current sampling circuit; voltage sampling circuit; the electric leakage sample circuit; power circuit; signal processing circuit; the fault memory circuit; the release drive circuit; wherein; the output of power circuit connects signal processing circuit; the fault memory circuit; the power supply input of release drive circuit; current sampling circuit; voltage sampling circuit; the signal output part of electric leakage sample circuit connects the current sampling signal input of signal processing circuit respectively; the voltage sampling signal input; electric leakage sampled signal input; the fault message output of signal processing circuit connects the signal input part of fault memory circuit, and the control signal output ends that opens circuit of signal processing circuit connects the signal input end of release drive circuit.
Described power supply breaker protection circuit; wherein: described current sampling circuit comprises A phase current mutual inductor, B phase current mutual inductor, C phase current mutual inductor; the elementary winding of A phase current mutual inductor, B phase current mutual inductor, C phase current mutual inductor is respectively applied in the A phase that is serially connected in supply line, B phase, the C phase circuit, and secondary winding one end of A phase current mutual inductor, B phase current mutual inductor, C phase current mutual inductor ground connection, the other end respectively connects A phase, B phase, the C phase current sampling signal input pin of signal processing circuit current sampling signal input respectively.
Described power supply breaker protection circuit; wherein: described voltage sampling circuit comprises first, second, third rectifier bridge; the input of first, second, third rectifier bridge is respectively applied for corresponding A phase, B phase, the C phase circuit that connects supply line, and the output of first, second, third rectifier bridge connects A phase, B phase, the C phase voltage sampled signal input pin of signal processing circuit voltage sampling signal input respectively.
Described power supply breaker protection circuit; wherein: described electric leakage sample circuit comprises zero-sequence transformer, zero sequence signal filter amplification circuit; the A phase of zero-sequence transformer input, B phase, C phase, neutral line pin connect A phase, B phase, C phase, the neutral line of supply line respectively, and the output of zero-sequence transformer connects the electric leakage sampled signal input of signal processing circuit by the zero sequence signal filter amplification circuit.
Described power supply breaker protection circuit; wherein: described release drive circuit comprises a switch triode; the base stage of this switch triode connects the control signal output ends that opens circuit of signal processing circuit; the collector electrode of this switch triode connects the output of power circuit, and its emitter connects the power input of described release.
Described power supply breaker protection circuit, wherein: described signal processing circuit comprises a signal processor, this signal processor adopts C8051F001.
Described power supply breaker protection circuit; wherein: described fault memory circuit comprises first; second; the 3rd rest-set flip-flop; fault is checked circuit; overcurrent; overvoltage; the leakage tripping indicator light; first; second; the corresponding respectively overcurrent that connects signal processing circuit fault message output of the signal input part of the 3rd rest-set flip-flop; overvoltage; leak current fault signal output connecting pin; first; second; the corresponding respectively overcurrent that connects of the signal output part of the 3rd rest-set flip-flop; overvoltage; the negative pole of leakage tripping indicator light, overcurrent; overvoltage; the positive pole of leakage tripping indicator light connects the signal output part that fault is checked circuit.
Described power supply breaker protection circuit; wherein: described fault checks that circuit comprises that power supply circuits and fault check button, and fault checks that button one end connects the positive pole that power supply circuits output, the other end connect described overcurrent, overvoltage, leakage tripping indicator light simultaneously.
The utility model adopts technique scheme will reach following technique effect:
Power supply breaker protection circuit of the present utility model; gather electric current, voltage, the electric leakage signal of each phase circuit of supply line respectively by current sampling circuit, voltage sampling circuit, electric leakage sample circuit; and electric current, voltage, the electric leakage signal that collects be transported to signal processing circuit analysis, judge; after signal processing circuit is handled; if overcurrent, overvoltage are arranged or/and electric leakage exceeds standard; to send control signal control release drive circuit and drive the release dropout; disconnect supply line, with the safety of protection power consumption equipment.Compare existing power supply breaker protection device, function is more, reliability is high, can provide comprehensive protection to circuit, power consumption equipment; In addition, signal processing circuit also can adopt single-chip microcomputer, makes that power supply breaker protection circuit volume is littler, reliability is higher.
Description of drawings
Fig. 1 is the circuit theory diagrams of the utility model power supply breaker protection circuit.
Embodiment
Embodiment:
The utility model power supply breaker protection circuit as shown in Figure 1; comprise the circuit breaker (not shown); circuit breaker comprises release (TQ); this power supply breaker protection circuit also comprises current sampling circuit; voltage sampling circuit; the electric leakage sample circuit; power circuit; signal processing circuit; the fault memory circuit; the release drive circuit; wherein; the output of power circuit connects signal processing circuit; the fault memory circuit; the power supply input of release drive circuit; current sampling circuit; voltage sampling circuit; the signal output part of electric leakage sample circuit connects the current sampling signal input of signal processing circuit respectively; the voltage sampling signal input; electric leakage sampled signal input; the fault message output of signal processing circuit connects the signal input part of fault memory circuit, and the control signal output ends that opens circuit of signal processing circuit connects the signal input end of release drive circuit.
Described current sampling circuit comprises A phase current mutual inductor CT1, B phase current mutual inductor CT2, C phase current mutual inductor CT3, A phase current mutual inductor CT1, B phase current mutual inductor CT2, the elementary winding of C phase current mutual inductor CT3 is serially connected in the A phase of three-phase four-wire power supply circuit respectively, the B phase, in the C phase circuit, the A phase current mutual inductor, the B phase current mutual inductor, the secondary winding two ends of C phase current mutual inductor respectively and meet load resistance R8, R10, R12, A phase current mutual inductor CT1, B phase current mutual inductor CT2, first end of the secondary winding of C phase current mutual inductor CT3 is ground connection respectively, second end is respectively by current-limiting resistance R7 and steering diode D4, current-limiting resistance R9 and steering diode D5, current-limiting resistance R10 is connected 9 of signal processing chip IC2 (adopting C8051F001) with steering diode D6,10,11 pin (pin AIN5, AIN6, AIN7); Current signal is after signal processing chip IC2 carries out logic determines, tripping operation if desired, then output signal to the base stage of switch triode Q1 the release drive circuit from its 35 pin (P0.2 pin), make switch triode Q1 conducting, the coil of release TQ gets, thread off and move, make circuit breaker trip, supply line's outage, simultaneously, overcurrent signal output connecting pin 29 pin (P1.1 pin) the output overcurrent signal of signal processing chip IC2 is extremely by two NOR gate chip IC 3C, the input of first rest-set flip-flop that IC3D constitutes is remembered this overcurrent trip signal by first rest-set flip-flop.
Second end of the secondary winding of A phase current mutual inductor CT1, B phase current mutual inductor CT2, C phase current mutual inductor CT3 also connects the second input VCC2 of direct current stabilizer IC0 in the power circuit respectively by diode D1, D2, D3; The first input end of direct current stabilizer IC0 connects A, B, the C phase circuit of three-phase power line in the power circuit by diode D7, D8, D9; Direct current stabilizer IC0 exports the conversion of signals one-tenth+5V voltage of first or second input input positive pole of rectifier diode D11 in the collector electrode, fault memory circuit of switch triode Q1 in power supply pin 23 pin, release drive circuit of signal processing chip IC2 to through device output VCC1 in the power circuit.
Corresponding respectively A, B, C, the N phase circuit that connects the three-phase four-wire power supply circuit of four input pins of zero-sequence transformer CT4, it connects signal input part 1 pin that output connects integrated circuit (IC) 1 (adopting model is 54123), resistance R 13, R14 are the peripheral biasing resistors of integrated circuit (IC) 1, capacitor C 4, C5, C6, C7 are the peripheral filter capacitors of integrated circuit (IC) 1, and they and integrated circuit (IC) 1 constitute the zero sequence signal filter amplification circuit jointly; If electric leakage signal is arranged, zero-sequence transformer CT4 exports corresponding signal, and this signal is delivered to 5 pin (AN1 pin) of signal processing chip IC2 again after described zero sequence signal filter amplification circuit is carried out filtering, amplification, carry out logic determines by signal processing chip IC2; Tripping operation then from 35 pin (P0.2 pin) the output signal driving switch triode Q1 conducting of signal processing chip IC2, powers on release TQ coil if desired, makes circuit breaker trip; Simultaneously, 28 pin of signal processing chip IC2 (P1.2 pin) output electric leakage signal is remembered this leakage tripping signal by the 3rd rest-set flip-flop to the input of the 3rd rest-set flip-flop that is made of two NOR gate chip IC 4A, IC4B.Rest-set flip-flop think existing mature technology, repeat no more the principle and the course of work of its concrete memory here.
In addition, the fault memory circuit comprises that also fault checks that circuit, fault show indicator light and reset circuit, wherein, fault shows that indicator light comprises overvoltage tripping operation indicator light D13, overcurrent tripping indicator light D14, leakage tripping indicator light D15, the positive pole of overvoltage tripping operation indicator light D13, overcurrent tripping indicator light D14, leakage tripping indicator light D15 all connects the output that fault is checked circuit, and three's negative pole is connected the output of the second, first, the 3rd rest-set flip-flop respectively by divider resistance R23, R24, R25 correspondence; Fault checks that circuit comprises that fault checks button AN2, the first rectifier diode D11, the second rectifier diode D12, the positive pole of the first rectifier diode D11 connects the output VCC1 of power circuit, the positive pole of the second rectifier diode D12 connects battery pack BATTERY, and the negative pole of first, second rectifier diode D11, D12 all checks that by fault button AN2 connects the positive pole of overvoltage tripping operation indicator light D13, overcurrent tripping indicator light D14, leakage tripping indicator light D15; In the time of need checking fault, connect fault and check button AN2, the output VCC1 of power circuit or battery pack BATTERY output electricity are to the positive pole of overvoltage tripping operation indicator light D13, overcurrent tripping indicator light D14, leakage tripping indicator light D15, if when overvoltage, overcurrent or electric leakage situation, to output low level signal always after corresponding the second, first, the 3rd RS trigger end memory, form pressure reduction on overvoltage tripping operation indicator light D13, overcurrent tripping indicator light D14 or leakage tripping indicator light D15, corresponding indicator light will shinnyly be indicated.Described reset circuit comprises a reset button AN1, reset button AN1 one end connects the output VCC1 of power circuit, the reset button AN1 other end all connects the reset terminal of first, second, third rest-set flip-flop, in case connect reset button AN1, the reset terminal of first, second, third rest-set flip-flop receives high level signal, memory in the past promptly disappears, and replys to be initial condition.
To sum up; power supply breaker protection circuit of the present utility model is gathered corresponding signal by current sampling circuit, voltage sampling circuit, electric leakage sample circuit; carry out logic determines by signal processing chip; circuit function is comprehensive, volume is small and exquisite, reliability is high, can provide comprehensive protection to three-phase four-wire power supply circuit and the power consumption equipment that is connected in this supply line.
Claims (8)
1; a kind of power supply breaker protection circuit; it is characterized in that: this power supply breaker protection circuit also comprises current sampling circuit; voltage sampling circuit; the electric leakage sample circuit; power circuit; signal processing circuit; the fault memory circuit; the release drive circuit; wherein; the output of power circuit connects signal processing circuit; the fault memory circuit; the power supply input of release drive circuit; current sampling circuit; voltage sampling circuit; the signal output part of electric leakage sample circuit connects the current sampling signal input of signal processing circuit respectively; the voltage sampling signal input; electric leakage sampled signal input; the fault message output of signal processing circuit connects the signal input part of fault memory circuit, and the control signal output ends that opens circuit of signal processing circuit connects the signal input end of release drive circuit.
2; power supply breaker protection circuit as claimed in claim 1; it is characterized in that: described current sampling circuit comprises the A phase current mutual inductor; the B phase current mutual inductor; the C phase current mutual inductor; the A phase current mutual inductor; the B phase current mutual inductor; the elementary winding of C phase current mutual inductor is respectively applied for the A phase that is serially connected in supply line; the B phase; in the C phase circuit, the A phase current mutual inductor; the B phase current mutual inductor; secondary winding one end of C phase current mutual inductor is ground connection respectively; the other end connects the A phase of signal processing circuit current sampling signal input respectively; the B phase; C phase current sampling signal input pin.
3, power supply breaker protection circuit as claimed in claim 1; it is characterized in that: described voltage sampling circuit comprises first, second, third rectifier bridge; the input of first, second, third rectifier bridge is respectively applied for corresponding A phase, B phase, the C phase circuit that connects supply line, and the output of first, second, third rectifier bridge connects A phase, B phase, the C phase voltage sampled signal input pin of signal processing circuit voltage sampling signal input respectively.
4, power supply breaker protection circuit as claimed in claim 1; it is characterized in that: described electric leakage sample circuit comprises zero-sequence transformer, zero sequence signal filter amplification circuit; the A phase of zero-sequence transformer input, B phase, C phase, neutral line pin connect A phase, B phase, C phase, the neutral line of supply line respectively, and the output of zero-sequence transformer connects the electric leakage sampled signal input of signal processing circuit by the zero sequence signal filter amplification circuit.
5, power supply breaker protection circuit as claimed in claim 1; it is characterized in that: described release drive circuit comprises a switch triode; the base stage of this switch triode connects the control signal output ends that opens circuit of signal processing circuit; the collector electrode of this switch triode connects the output of power circuit, and its emitter is used to connect the power input of release.
6, as each described power supply breaker protection circuit of claim 1 to 5, it is characterized in that: described signal processing circuit comprises a signal processor, and this signal processor adopts C8051F001.
7; as each described power supply breaker protection circuit of claim 1 to 5; it is characterized in that: described fault memory circuit comprises first; second; the 3rd rest-set flip-flop; fault is checked circuit; overcurrent; overvoltage; the leakage tripping indicator light; first; second; the corresponding respectively overcurrent that connects signal processing circuit fault message output of the signal input part of the 3rd rest-set flip-flop; overvoltage; leak current fault signal output connecting pin; first; second; the corresponding respectively overcurrent that connects of the signal output part of the 3rd rest-set flip-flop; overvoltage; the negative pole of leakage tripping indicator light, overcurrent; overvoltage; the positive pole of leakage tripping indicator light connects the signal output part that fault is checked circuit.
8, power supply breaker protection circuit as claimed in claim 7; it is characterized in that: described fault checks that circuit comprises that power supply circuits and fault check button, and fault checks that button one end connects the positive pole that power supply circuits output, the other end connect described overcurrent, overvoltage, leakage tripping indicator light simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200820230830U CN201378730Y (en) | 2008-12-12 | 2008-12-12 | Power circuit breaker protective circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200820230830U CN201378730Y (en) | 2008-12-12 | 2008-12-12 | Power circuit breaker protective circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201378730Y true CN201378730Y (en) | 2010-01-06 |
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ID=41518850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200820230830U Expired - Fee Related CN201378730Y (en) | 2008-12-12 | 2008-12-12 | Power circuit breaker protective circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201378730Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102412555A (en) * | 2011-10-10 | 2012-04-11 | 厦门士林电机有限公司 | Novel grounding fault protection electrical apparatus release |
| US9030793B2 (en) | 2012-04-13 | 2015-05-12 | General Electric Company | Method, device, and system for monitoring current provided to a load |
| CN106451327A (en) * | 2016-11-28 | 2017-02-22 | 海格科技股份有限公司 | Circuit breaker |
| CN108306257A (en) * | 2018-04-07 | 2018-07-20 | 佛山市顺德区信辉达电子有限公司 | Three pole break-make leakage protecting plug of intelligent control type |
-
2008
- 2008-12-12 CN CN200820230830U patent/CN201378730Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102412555A (en) * | 2011-10-10 | 2012-04-11 | 厦门士林电机有限公司 | Novel grounding fault protection electrical apparatus release |
| US9030793B2 (en) | 2012-04-13 | 2015-05-12 | General Electric Company | Method, device, and system for monitoring current provided to a load |
| CN106451327A (en) * | 2016-11-28 | 2017-02-22 | 海格科技股份有限公司 | Circuit breaker |
| CN108306257A (en) * | 2018-04-07 | 2018-07-20 | 佛山市顺德区信辉达电子有限公司 | Three pole break-make leakage protecting plug of intelligent control type |
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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: 20100106 Termination date: 20101212 |