CN201107361Y - Residual current type circuit of electric fire supervising detector - Google Patents

Residual current type circuit of electric fire supervising detector Download PDF

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Publication number
CN201107361Y
CN201107361Y CNU2007200416826U CN200720041682U CN201107361Y CN 201107361 Y CN201107361 Y CN 201107361Y CN U2007200416826 U CNU2007200416826 U CN U2007200416826U CN 200720041682 U CN200720041682 U CN 200720041682U CN 201107361 Y CN201107361 Y CN 201107361Y
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China
Prior art keywords
circuit
pin
resistance
electric capacity
microprocessor
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Expired - Lifetime
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CNU2007200416826U
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Chinese (zh)
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张志刚
顾怡文
褚文
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Changshu Switchgear Manufacturing Co Ltd
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Changshu Switchgear Manufacturing Co Ltd
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Abstract

The utility model relates to a circuit of a residual current electric fire monitoring detector, which belongs to the low-voltage apparatus field. The detector comprises a signal sampling circuit, a signal processing circuit, a microprocessor circuit, an output circuit, a storage circuit, a real-time clock circuit, a human-computer interface circuit, and a communication circuit, wherein, the signal sampling circuit is connected with the signal processing circuit; the signal processing circuit, the storage circuit, the output circuit, the real-time clock circuit, the human-computer interface circuit, and the communication circuit are connected with the microprocessor circuit; the storage circuit is connected with the real-time clock circuit. The circuit has the advantages of compact structure, high reliability, high precision, wide measuring range, and small volume.

Description

A kind of circuit of residual-current electrical fire monitoring detector
Technical field
The utility model relates to a kind of circuit of residual-current electrical fire monitoring detector, and it belongs to the low-voltage electrical apparatus field.
Background technology
Develop rapidly along with China's economic construction, the power consumption of producing and living also increases considerably thereupon, while has also stayed a lot of potential safety hazards but electric energy is bringing greatly easily for life and production, the electrical fire accident also is ascendant trend year by year, and the caused fire of electric fault has become the key factor that threatens people's lives and production safety at present.According to statistics, the electrical fire accident in a lot of cities, the whole nation or area occupies the first place of all kinds of fire near 50%～80% of its fire failure total amount, has caused massive losses for the country and people's lives and properties.And the fire that electric leakage causes is modal electrical fire.
The cause of present stage research and the interior electrical fire of discussion buildings also provides corresponding preventive measure and makes corresponding preventative product, has very important social effect.
A kind of electric fireproof integrated protection registering instrument is disclosed among the Chinese patent literature CN2571046Y (Granted publication day is on September 3rd, 2003), it adopts 8 single-chip microcomputers as microprocessor, add the peripheral expansion circuit and expand, like this: outside input circuit will arrive microcontroller circuit again behind the parallel port expanded circuit; Voltage, current signal after signal processing circuit is handled again through the analog selection switch to the A/D change-over circuit, microprocessor reads conversion value from the A/D change-over circuit again.Therefore the sort circuit components and parts are many, the circuit complexity, and volume is big, poor reliability.The voltage protection function of detector for electric fire protection in the market in addition adopts the mode of transformer sampling mostly, and the sort circuit volume is big, low precision.The current measurement function of the detector for electric fire protection that has again only has single range, its low precision, and narrow range can not satisfy the wide region Testing requirement.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of circuit of residual-current electrical fire monitoring detector is provided, and its circuit structure compactness, reliability height, precision height, measurement range is wide and volume is little.
The purpose of this utility model is finished like this, a kind of circuit of residual-current electrical fire monitoring detector, comprise signal sampling circuit 1, signal processing circuit 2, microcontroller circuit 3, output circuit 5, memory circuit 4, real time clock circuit 6, man-machine interface circuit 7, telecommunication circuit 8, signal sampling circuit 1 is connected with signal processing circuit 2, signal processing circuit 2, memory circuit 4, output circuit 5, real time clock circuit 6, man-machine interface circuit 7, telecommunication circuit 8 are connected with microcontroller circuit 3, and memory circuit 4 is connected with real time clock circuit 6.
Signal sampling circuit 1 is made up of resistance R 1, R2, R3, capacitor C 1, the termination of resistance R 1, R2 is gone into phase line voltage, and the other end of resistance R 1, R2 is connected with the two ends of resistance R 3 respectively, and capacitor C 1 is in parallel with resistance R 3, resistance R 1, R2 are big resistance, and R3 is a small resistor.
Signal processing circuit 2 is made up of voltage signal processing circuit, current signal treatment circuit.
Voltage signal processing circuit is by operational amplifier U1A, resistance R 4-R9, capacitor C 2 is formed, resistance R 4, the other end of the end of R6 and the resistance R 1 of signal sampling circuit, one end of resistance R 3 connects, resistance R 5, the other end of the end of R7 and the resistance R 2 of signal sampling circuit, the other end of resistance R 3 connects, one end of the other end of resistance R 6 and resistance R 8,2 pin of operational amplifier U1A connect, one end of the other end of resistance R 7 and resistance R 9,3 pin of operational amplifier U1A connect, one end of the other end of resistance R 8 and capacitor C 2,1 pin of operational amplifier U1A, 76 pin of microprocessor U4 connect in the microcontroller circuit, the other end of resistance R 9 is connected with reference voltage V ref, 4 pin of operational amplifier U1A meet DC voltage VCC, resistance R 4, R5, the other end of capacitor C 2, the 11 pin ground connection of operational amplifier U1A.
The current signal treatment circuit is by resistance R 10-R16, capacitor C 3, C4, operational amplifier U2 forms, resistance R 10 is in parallel with current transformer I-A, one end of resistance R 10 and resistance R 11, one end of capacitor C 3 connects, the other end of the other end of resistance R 10 and capacitor C 3, one end of resistance R 14, reference voltage V ref connects, the other end of resistance R 11 is connected with 3 pin of operational amplifier U2A, 1 of operational amplifier U2A, 2 pin and resistance R 12, the end of R13 connects, one end of the other end of resistance R 14 and resistance R 15,6 pin of operational amplifier U2B connect, the other end of resistance R 15 and resistance R 16, one end of capacitor C 4,7 pin of operational amplifier U2B connect, the other end of resistance R 13 is connected with 5 pin of operational amplifier U2B, resistance R 12, the other end of R16 respectively with microcontroller circuit in 68 pin of microprocessor U4,74 pin connect, 4 pin of operational amplifier U2 meet direct supply VCC, 11 pin of operational amplifier U2, the other end ground connection of capacitor C 4.
Microcontroller circuit 3 is by microprocessor U4, integrated circuit (IC) 2, IC3, crystal oscillator CT1, capacitor C 8-C11 forms, one end of capacitor C 11,1 pin of integrated circuit (IC) 2,2 pin of integrated circuit (IC) 3,13 of microprocessor U4,78 pin meet direct supply VCC, 2 pin of integrated circuit (IC) 2 and an end of capacitor C 8,77 pin of microprocessor U4 connect, 10 pin of microprocessor U4 and the end of crystal oscillator CT1, one end of capacitor C 9 connects, 12 pin of microprocessor U4 and the other end of crystal oscillator CT1, one end of capacitor C 10 connects, 5 of microprocessor U4,15-20, the 32-39 pin is connected with man-machine interface circuit 7, the 24-27 pin of microprocessor U4 is connected with memory circuit 4,22 of microprocessor U4, the 25-27 pin is connected with real time clock circuit 6,9 pin of microprocessor U4 are connected with 3 pin of integrated circuit (IC) 3,40 of microprocessor U4,41,43 pin are connected with telecommunication circuit 8,77 of microprocessor U4,11 pin, 3 pin of integrated circuit (IC) 2,1 pin of integrated circuit (IC) 3, the other end ground connection of capacitor C 8-C11.
Memory circuit 4 is made up of integrated circuit (IC) 4 and capacitor C 13,1,6,2,5 pin of integrated circuit (IC) 4 are connected with the 24-27 pin of microprocessor U4 respectively, 6,5,2 pin of integrated circuit (IC) 4 are connected with 14,15,16 pin of integrated circuit (IC) 5 in the real time clock circuit 6 respectively, one termination direct supply VCC of 3,7,8 pin of integrated circuit (IC) 4, capacitor C 13,4 pin of integrated circuit (IC) 4, the other end ground connection of capacitor C 13.
Real time clock circuit 6 is by integrated circuit (IC) 5, crystal oscillator CT2, capacitor C 14, battery BT1 forms, 12 pin of integrated circuit (IC) 5 are connected with 22 pin of microprocessor U4,14 of integrated circuit (IC) 5,15,16 pin respectively with 25 of microprocessor U4,27,6 of 26 pin and integrated circuit (IC) 4,5,2 pin connect, 3 of integrated circuit (IC) 5,5 pin are connected with the two ends of crystal oscillator CT2 respectively, 11 of integrated circuit (IC) 5,17,20 pin, one end of capacitor C 14 is connected with direct supply VCC, 2 pin of integrated circuit (IC) 5 are connected 1 of integrated circuit (IC) 5 with battery BT1 is anodal, 10 pin, the other end of capacitor C 14, the minus earth of battery BT1.
Man-machine interface circuit 7 is by LCD U6 and capacitor C 12, triode Q1, resistance R 18 is formed, 2 pin of LCD U6 and an end of capacitor C 12, the collector of triode Q1 is connected with direct supply VCC, 3 of LCD U6,18 pin connect, the 3-18 pin of LCD U6 respectively with 20 of microprocessor U4,19,18,39-32,17,16,15 pin connect, 19 pin of LCD U6 are connected with the emitter of triode Q1, the base stage of triode Q1 is connected with an end of resistance R 18, the other end of resistance R 18 is connected 1 of LCD U6 with 5 pin of microprocessor U4,20 pin, the other end ground connection of capacitor C 12.
Telecommunication circuit 8 is by integrated circuit (IC) 6, resistance R 20, R21, capacitor C 16, C17, socket J1 forms, 1 of integrated circuit (IC) 6,7,16 pin, capacitor C 16, the end of C17, one end of resistance R 20 is connected with direct supply VCC, 13 pin of integrated circuit (IC) 6 and an end of resistance R 21,2 pin of socket J1 connect, 12 pin of integrated circuit (IC) 6 and the other end of resistance R 20,1 pin of socket J1 connects, 6 of integrated circuit (IC) 6,3 pin respectively with 40 of microprocessor U4,41 pin connect, 4 of integrated circuit (IC) 6,5 pin are connected 2 of integrated circuit (IC) 6 with 43 pin of microprocessor U4,8,9,15 pin, the other end of resistance R 21,3 pin of socket J1, capacitor C 16, the other end ground connection of C17.
Microcontroller circuit 3 adopts 16 single-chip microcomputers to carry the A/D change-over circuit as microprocessor, its function is strong, and peripherals is many, and input/output port is many, therefore parallel port expanded circuit, analog selection on-off circuit in the middle of having saved, signal sampling circuit 1 carries out signal amplification, current potential lifting through signal processing circuit 2, directly sends into microcontroller circuit 3 then, carries out the A/D conversion, and then digital quantity carried out operational analysis, such circuit structure compactness, volume is little, the reliability height.Voltage sampling in the signal sampling circuit 1 is owing to adopt big resistance step-down, and small resistor carries out voltage sample, compares the sampling of transformer step-down voltage, and volume dwindles greatly, and precision is higher.Current signal is handled owing to adopt two ranges of size to carry out current measurement in the signal processing circuit 2, and current measuring range is wide, the precision height.
Description of drawings
Fig. 1 is the schematic block circuit diagram of residual-current electrical fire monitoring detector.
Fig. 2 is the circuit electrical schematic diagram of residual-current electrical fire monitoring detector.
Embodiment
By the description of applicant, will help to understand the utility model more, and good effect of the present utility model is embodied more, but embodiment should not be considered as the restriction to some extent to the utility model scheme embodiment.
See also Fig. 1 schematic block circuit diagram of the present utility model.
Wherein signal sampling circuit 1 passes the signal along to signal processing circuit 2 and carries out that signal amplifies, the current potential lifting, sends into microcontroller circuit 3 then, carries out the A/D conversion, and then digital quantity is carried out operational analysis, sends into output circuit 5 at last; Data and real time clock circuit 6, man-machine interface circuit 7, memory circuit 4 and the telecommunication circuit 8 handled through microcontroller circuit 3 pass mutually.
Seeing also Fig. 2 the utility model is example with A mutually, voltage sampling in the signal sampling circuit 1 is by resistance R 1, R2 is from the power taking of A phase, adopt the big resistance R 1 of high pressure, the R2 step-down, small resistor R3 carries out voltage sample, to send into the voltage signal processing circuit of signal processing circuit 2 through the differential voltage signal of R3 sampling then, by operational amplifier U1A (TLV2254A), resistance R 6, R8, R7, R9 amplifies, simultaneously carry out the current potential lifting by reference voltage V ref (2.048V), obtain meeting the voltage signal Ua that the A/D conversion requires, send into 76 pin of the microprocessor U4 (M16C28) of microcontroller circuit 3, carry out the A/D conversion, and then digital quantity is carried out operational analysis.
In the signal processing circuit 2 the current signal treatment circuit will be from current transformer I-A detection signal, the utility model is an example with one tunnel transducer signal, exchange sampling through resistance R 10, carry out the current potential lifting by its accurate voltage Vref (2.048V) and get current signal Ia, current signal Ia is earlier by resistance R 11, operational amplifier U2A (TLV2254A) follows, one the tunnel through resistance R 12, obtain wide range signal Ial, another road is through operational amplifier U2B (TLV2254A), resistance R 13, R14, R15 amplifies and carries out the current potential lifting by its accurate voltage Vref (2.048V), obtain journey signal Ias in a small amount through R16, simultaneously with the size two ranges signal Ial, Ias sends into 68 pin of the microprocessor U4 (M16C28) of microcontroller circuit 3,74 pin, carry out the A/D conversion, microprocessor determines to adopt the value of which range to calculate according to conversion value, promptly adopt two ranges of size to carry out current measurement, measuring accuracy and scope are improved greatly.
Microcontroller circuit 3 adopts 16 single-chip microcomputers to carry the M16C28 of A/D change-over circuit as microprocessor U4, signal sampling circuit 1 carries out signal amplification, current potential lifting through signal processing circuit 2, directly send into microcontroller circuit 3 then and carry out the A/D conversion, and then digital quantity is carried out operational analysis.
Carrying out data between man-machine interface circuit 7 and the microcontroller circuit 3 transmits, the microprocessor U4 of microcontroller circuit 3 reads the key information of man-machine interface, according to key information the make a gift to someone LCD U6 (WG12864E) of machine interface circuit 7 of displaying contents is shown then, realize man-machine informational function.
Carry out data between memory circuit 4 and the microcontroller circuit 3 and transmit, the microprocessor U4 of microcontroller circuit 3 can deposit data in memory circuit 4, also the data in the memory circuit 4 can be read, and realizes data storage function.Integrated circuit (IC) 4 is AT25640.
Carrying out data between real time clock circuit 6 and the microcontroller circuit 3 transmits, the microprocessor U4 of microcontroller circuit 3 can read the clock data of real time clock circuit 6, also the clock data of new settings can be write real time clock circuit 6, the realization clock data is adjusted and is read.Integrated circuit (IC) 5 is DS1305EN.
Carrying out data between telecommunication circuit 8 and the microcontroller circuit 3 transmits, the microprocessor U4 of microcontroller circuit 3 can receive data from bus by telecommunication circuit 8, also the data of self can be delivered on the bus by telecommunication circuit 8, thereby be realized data communication function.Integrated circuit (IC) 6 is ADM2483.
Output circuit 5 is made up of capacitor C18, C19, C20, C22, C23, resistance R 22, R23, double-channel audio amplifier IC7, loudspeaker Y1, Y2,23 pin of microprocessor U4 produce width modulation (PWM) signal, behind capacitor C18 isolated DC component, obtain the input of signal, amplify rear drive two-way loudspeaker Y1, Y2 through double-channel audio amplifier IC7 as double-channel audio amplifier IC7 (TDA2822) by resistance R 22, R23 dividing potential drop.Capacitor C19, C20 provide and exchange the negative feedback path, and capacitor C22, C23 are output coupling capacitor.When breaking out of fire, two-way loudspeaker Y1, Y2 can report to the police with long-range on the spot simultaneously.
The utility model is owing to adopted foregoing circuit, and the intermediate link of circuit is less, and components and parts significantly reduce, and have embodied the circuit structure compactness, reliability height, the advantage that the higher measurement range of precision is wide and volume dwindles greatly.

Claims (10)

1, a kind of circuit of residual-current electrical fire monitoring detector, it is characterized in that it comprises signal sampling circuit (1), signal processing circuit (2), microcontroller circuit (3), output circuit (5), memory circuit (4), real time clock circuit (6), man-machine interface circuit (7), telecommunication circuit (8), signal sampling circuit (1) is connected with signal processing circuit (2), signal processing circuit (2), memory circuit (4), output circuit (5), real time clock circuit (6), man-machine interface circuit (7), telecommunication circuit (8) is connected with microcontroller circuit (3), and memory circuit (4) is connected with real time clock circuit (6).
2, the circuit of a kind of residual-current electrical fire monitoring detector according to claim 1, it is characterized in that described signal sampling circuit (1) is made up of resistance (R1, R2, R3), electric capacity (C1), one termination of resistance (R1, R2) is gone into phase line voltage, the other end of resistance (R1, R2) is connected with the two ends of resistance (R3) respectively, electric capacity (C1) is in parallel with resistance (R3), resistance (R1, R2) is big resistance, (R3) is small resistor.
3, the circuit of a kind of residual-current electrical fire monitoring detector according to claim 1 is characterized in that described signal processing circuit (2) is made up of voltage signal processing circuit, current signal treatment circuit.
4, the circuit of a kind of residual-current electrical fire monitoring detector according to claim 3, it is characterized in that described voltage signal processing circuit is by operational amplifier (U1A), resistance (R4-R9), electric capacity (C2) is formed, resistance (R4, the other end of the resistance (R1) of an end R6) and signal sampling circuit, one end of resistance (R3) connects, resistance (R5, the other end of the resistance (R2) of an end R7) and signal sampling circuit, the other end of resistance (R3) connects, one end of the other end of resistance (R6) and resistance (R8), 2 pin of operational amplifier (U1A) connect, one end of the other end of resistance (R7) and resistance (R9), 3 pin of operational amplifier (U1A) connect, one end of the other end of resistance (R8) and electric capacity (C2), 1 pin of operational amplifier (U1A), 76 pin of microprocessor in the microcontroller circuit (U4) connect, the other end of resistance (R9) is connected with reference voltage (Vref), 4 pin of operational amplifier (U1A) meet DC voltage (VCC), resistance (R4, R5), the other end of electric capacity (C2), 11 pin ground connection of operational amplifier (U1A).
5, the circuit of a kind of residual-current electrical fire monitoring detector according to claim 3, it is characterized in that described current signal treatment circuit is by resistance (R10-R16), electric capacity (C3, C4), operational amplifier (U2) is formed, resistance (R10) is in parallel with current transformer (I-A), one end of resistance (R10) and resistance (R11), one end of electric capacity (C3) connects, the other end of the other end of resistance (R10) and electric capacity (C3), one end of resistance (R14), reference voltage (Vref) connects, the other end of resistance (R11) is connected with 3 pin of operational amplifier (U2A), 1 of operational amplifier (U2A), 2 pin and resistance (R12, R13) a end connects, one end of the other end of resistance (R14) and resistance (R15), 6 pin of operational amplifier (U2B) connect, the other end of resistance (R15) and resistance (R16), one end of electric capacity (C4), 7 pin of operational amplifier (U2B) connect, the other end of resistance (R13) is connected with 5 pin of operational amplifier (U2B), resistance (R12, R16) the other end respectively with microcontroller circuit in 68 pin of microprocessor (U4), 74 pin connect, 4 pin of operational amplifier (U2) connect direct supply (VCC), 11 pin of operational amplifier (U2), the other end ground connection of electric capacity (C4).
6, the circuit of a kind of residual-current electrical fire monitoring detector according to claim 1, it is characterized in that described microcontroller circuit (3) is by microprocessor (U4), integrated circuit (IC2, IC3), crystal oscillator (CT1), electric capacity (C8-C11) is formed, one end of electric capacity (C11), 1 pin of integrated circuit (IC2), 2 pin of integrated circuit (IC3), 13 of microprocessor (U4), 78 pin connect direct supply (VCC), one end of 2 pin of integrated circuit (IC2) and electric capacity (C8), 77 pin of microprocessor (U4) connect, one end of 10 pin of microprocessor (U4) and crystal oscillator (CT1), one end of electric capacity (C9) connects, the other end of 12 pin of microprocessor (U4) and crystal oscillator (CT1), one end of electric capacity (C10) connects, 5 of microprocessor (U4), 15-20, the 32-39 pin is connected with man-machine interface circuit (7), the 24-27 pin of microprocessor (U4) is connected with memory circuit (4), 22 of microprocessor (U4), the 25-27 pin is connected with real time clock circuit (6), 9 pin of microprocessor (U4) are connected with 3 pin of integrated circuit (IC3), 40 of microprocessor (U4), 41,43 pin are connected with telecommunication circuit (8), 77 of microprocessor (U4), 11 pin, 3 pin of integrated circuit (IC2), 1 pin of integrated circuit (IC3), the other end ground connection of electric capacity (C8-C11).
7, the circuit of a kind of residual-current electrical fire monitoring detector according to claim 1, it is characterized in that described memory circuit (4) is made up of integrated circuit (IC4) and electric capacity (C13), 1 of integrated circuit (IC4), 6,2,5 pin are connected with the 24-27 pin of microprocessor (U4) respectively, 6 of integrated circuit (IC4), 5,2 pin respectively with real time clock circuit (6) in integrated circuit (IC5) 14,15,16 pin connect, 3 of integrated circuit (IC4), 7,8 pin, one termination direct supply (VCC) of electric capacity (C13), 4 pin of integrated circuit (IC4), the other end ground connection of electric capacity (C13).
8, the circuit of a kind of residual-current electrical fire monitoring detector according to claim 1, it is characterized in that described real time clock circuit (6) is by integrated circuit (IC5), crystal oscillator (CT2), electric capacity (C14), battery (BT1) is formed, 12 pin of integrated circuit (IC5) are connected with 22 pin of microprocessor (U4), 14 of integrated circuit (IC5), 15,16 pin respectively with 25 of microprocessor (U4), 27,6 of 26 pin and integrated circuit (IC4), 5,2 pin connect, 3 of integrated circuit (IC5), 5 pin are connected with the two ends of crystal oscillator (CT2) respectively, 11 of integrated circuit (IC5), 17,20 pin, one end of electric capacity (C14) is connected with direct supply (VCC), 2 pin of integrated circuit (IC5) are connected 1 of integrated circuit (IC5) with battery (BT1) is anodal, 10 pin, the other end of electric capacity (C14), the minus earth of battery (BT1).
9, the circuit of a kind of residual-current electrical fire monitoring detector according to claim 1, it is characterized in that described man-machine interface circuit (7) is by LCD (U6) and electric capacity (C12), triode (Q1), resistance (R18) is formed, one end of 2 pin of LCD (U6) and electric capacity (C12), the collector of triode (Q1) is connected with direct supply (VCC), 3 of LCD (U6), 18 pin connect, 3-18 (4-17) pin of LCD (U6) respectively with 20 of microprocessor (U4), 19,18,39-32,17,16,15 pin connect, 19 pin of LCD (U6) are connected with the emitter of triode (Q1), the base stage of triode (Q1) is connected with an end of resistance (R18), the other end of resistance (R18) is connected with 5 pin of microprocessor (U4), 1 of LCD (U6), 20 pin, the other end ground connection of electric capacity (C12).
10, the circuit of a kind of residual-current electrical fire monitoring detector according to claim 1, it is characterized in that described telecommunication circuit (8) is by integrated circuit (IC6), resistance (R20, R21), electric capacity (C16, C17), socket (J1) is formed, 1 of integrated circuit (IC6), 7,16 pin, electric capacity (C16, C17) a end, one end of resistance (R20) is connected with direct supply (VCC), one end of 13 pin of integrated circuit (IC6) and resistance (R21), 2 pin of socket (J1) connect, the other end of 12 pin of integrated circuit (IC6) and resistance (R20), 1 pin of socket (J1) connects, 6 of integrated circuit (IC6), 3 pin respectively with 40 of microprocessor (U4), 41 pin connect, 4 of integrated circuit (IC6), 5 pin are connected with 43 pin of microprocessor (U4), 2 of integrated circuit (IC6), 8,9,15 pin, the other end of resistance (R21), 3 pin of socket (J1), electric capacity (C16, C17) other end ground connection.
CNU2007200416826U 2007-11-28 2007-11-28 Residual current type circuit of electric fire supervising detector Expired - Lifetime CN201107361Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNU2007200416826U CN201107361Y (en) 2007-11-28 2007-11-28 Residual current type circuit of electric fire supervising detector

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Application Number Priority Date Filing Date Title
CNU2007200416826U CN201107361Y (en) 2007-11-28 2007-11-28 Residual current type circuit of electric fire supervising detector

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CN201107361Y true CN201107361Y (en) 2008-08-27

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101807334A (en) * 2010-03-18 2010-08-18 阮立恒 Residual-current electrical fire monitor
CN103675572A (en) * 2012-09-14 2014-03-26 深圳市海洋王照明工程有限公司 Electric leakage detector
CN104374986A (en) * 2014-11-18 2015-02-25 浙江正泰电器股份有限公司 Novel current sampling circuit and electronic controller of breaker

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101807334A (en) * 2010-03-18 2010-08-18 阮立恒 Residual-current electrical fire monitor
CN103675572A (en) * 2012-09-14 2014-03-26 深圳市海洋王照明工程有限公司 Electric leakage detector
CN104374986A (en) * 2014-11-18 2015-02-25 浙江正泰电器股份有限公司 Novel current sampling circuit and electronic controller of breaker
CN104374986B (en) * 2014-11-18 2017-10-24 浙江正泰电器股份有限公司 The electronic controller of breaker

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Granted publication date: 20080827