CN100370664C - Arc and leakage protector - Google Patents

Arc and leakage protector Download PDF

Info

Publication number
CN100370664C
CN100370664C CNB2004100669214A CN200410066921A CN100370664C CN 100370664 C CN100370664 C CN 100370664C CN B2004100669214 A CNB2004100669214 A CN B2004100669214A CN 200410066921 A CN200410066921 A CN 200410066921A CN 100370664 C CN100370664 C CN 100370664C
Authority
CN
China
Prior art keywords
signal
resistance
arc
circuit
instrument transformer
Prior art date
Application number
CNB2004100669214A
Other languages
Chinese (zh)
Other versions
CN1601842A (en
Inventor
黄海春
Original Assignee
宁波习羽电子发展有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 宁波习羽电子发展有限公司 filed Critical 宁波习羽电子发展有限公司
Priority to CNB2004100669214A priority Critical patent/CN100370664C/en
Publication of CN1601842A publication Critical patent/CN1601842A/en
Application granted granted Critical
Publication of CN100370664C publication Critical patent/CN100370664C/en

Links

Abstract

The present invention discloses an electric arc and electrical leakage protecting device. The present invention comprises a control circuit board (1), a failure detecting circuit (2) and a tripping device (3), wherein the failure detecting circuit (2) comprises an electric arc detection mutual inductor (L3), an amplifying triode (V3), resistors (R15), (R16), (R17), (R18), (R23), capacitors (C14), (C15), a voltage regulator (VD3) and a zero sequence current detection mutual inductor (L2); when detecting failure signals, the failure detecting circuit (2) accesses the control circuit board (1) to carry out analysis processing and send out specific signals for driving the tripping device (3) to cut off the power supply. The present invention has the advantages that the present invention can integrate electric arc and electrical leakage failure detection, short circuit detection and over current failure detection into one body; during the normal electrical power supply, the present invention can automatically detect failures and automatically cut off the power supply in short time; the present invention effectively solves the fire problem caused by the electric arc and the electric leakage failures, and performs the function of line protection.

Description

Electric arc and earth leakage protective device

Technical field

The present invention relates to a kind of electric arc, leak current fault line protector; particularly a kind of being applied in the low voltage power supply system; when between the transmission line or the electric arc that causes owing to fault between transmission line and the ground, electric leakage and when burning takes place, the electric arc and the earth leakage protective device of the power supply of can cutting off the electricity supply automatically.

Background technology

At present, along with development of global economy, the raising of people's living standard, per capita household electricity consumption increases severely.And in the low-voltage distribution feed system,, make supply line often be in full load condition along with the continuous increase of electrical equipment, the continuous increase of single-machine capacity, be in overload sometimes even for a long time, thereby the insulating barrier on its supply line surface is very easily aging; And general air switch and earth leakage protection switch are for because aging electric arc that takes place of circuit surface insulation layer and then the burning that causes can not be moved timely and effectively, and the phenomenon that causes the electric arc in the transmission line and produce arc burning takes place repeatedly.There is data statistics to show, according to adding up in the meeting on September 23rd, 2003 of U.S. Consumers Council: there is every year the fire that causes because of electrical equipment to have 73500, dead 591, the wounded 2247, ten hundred million property loss; Domestic document announcement, 50% owing to electric wiring causes in the fire that took place in 1996.

Summary of the invention

Technical problem to be solved by this invention is in order to overcome the safety problem that electric leakage, electric arc, overcurrent, overvoltage etc. cause, it is electric arc and earth leakage protective device that a kind of new household electrical appliance safety device is provided.

The present invention solves the problems of the technologies described above the technical scheme that is adopted: a kind of electric arc and earth leakage protective device comprise the control circuit board that contains signal amplification circuit and signal analysis and processing circuit, the failure detector circuit that links to each other with the signal input part of control circuit board, the trip gear that links to each other with the signal output part of control circuit board;

Described failure detector circuit comprises that arc-detection instrument transformer, signal load resistance R 16, current-limiting resistance R23, signal coupling capacitance C14, signal amplifying triode V3, first resistance R 15, second resistance R 17, the 3rd resistance R 18, first capacitor C 15, pressurizer VD3 and zero-sequence current detect instrument transformer;

The arc-detection instrument transformer is serially connected on the live wire or zero line of AC power; Signal load resistance R 16 is connected in parallel on the two ends of arc-detection instrument transformer, a termination current-limiting resistance R23 of arc-detection instrument transformer, meet signal amplifying triode V3 again after, the signal analysis and processing circuit of access control circuit board; This end also connects first resistance R 15 after the parallel connection, signal coupling capacitance C14 again with the signal analysis and processing circuit of the common port access control circuit board of pressurizer VD3; The other end of arc-detection instrument transformer L3 is connected to the tie point of second resistance R 17, the 3rd resistance R 18;

The 3rd resistance R 18 and first capacitor C, 15 backs in parallel, one end ground connection, the other end is with the signal analysis and processing circuit of the negative electrode access control circuit board of second resistance R, 17 series connection backs and pressurizer VD3; The plus earth of pressurizer VD3;

It is that string is imported, exports in the two-wire circuit in AC power that zero-sequence current detects instrument transformer; Zero-sequence current detects the signal output part of instrument transformer, the signal amplification circuit of access control circuit board.

Described control circuit board also comprises power circuit and drive circuit; Fault-signal inserts described signal amplification circuit and signal analysis and processing circuit, and output signal inserts trip gear.

Described trip gear comprises a pair of moving contact, a pair of fixed contact and trip assembley therefor, its fixed contact links to each other with the incoming line of AC power, tripping coil in moving contact and the trip assembley therefor, the output line of AC power link to each other, and trip assembley therefor is by linking to each other with microprocessor in the signal analysis and processing circuit behind the drive circuit;

Described trip gear is the tripping mechanism that needs artificial forced resetting; Described microprocessor is the P89LPCL901 chip of tape comparator MCU; Transducer magnet ring in arc-detection instrument transformer, the zero-sequence current detection instrument transformer is by permeability magnetic material--and the iron silica-alumina material is made; Described power circuit comprises that a rectifier circuit and one are through the high withstand voltage linear power supply circuit after TL431 voltage reference module and high withstand voltage triode electric current amplify again after the rectifier bridge rectification.

Compared with prior art, the invention has the advantages that: have function characteristics such as current collection arc fault, earth leakage fault, short trouble and over current fault detection, it can automatic fault detection when normal power supply, and the function of cutting off the electricity supply automatically in the extremely short time.Do not need extra power supply when the present invention works, discern automatically with online mode and handle above-mentioned information, and directly cut off the electricity supply; Fault is manually pressed reset button of the present invention and is made the sound closing of contact once more after getting rid of, the system restoration power supply.In addition; compact conformation of the present invention, volume be small and exquisite, reliable, need not to add in addition power supply and advantage such as easy for installation, and can cut off the electricity supply in the very first time that fault takes place, so use the present invention; can solve the problem that electric arc, leak current fault cause fire effectively, play the effect of protection circuit.

Description of drawings

Fig. 1 is a theory diagram of the present invention;

Fig. 2 is a circuit working schematic diagram of the present invention.

Embodiment

Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.

As shown in Figure 1 and Figure 2, a kind of electric arc and earth leakage protective device comprise the control circuit board 1 that contains signal amplification circuit 5 and signal analysis and processing circuit 6, the failure detector circuit 2 that links to each other with the signal input part of control circuit board 1, the trip gear 3 that links to each other with the signal output part of control circuit board 1; Described failure detector circuit 2 comprises that arc-detection instrument transformer L3, signal load resistance R 16, current-limiting resistance R23, signal coupling capacitance C14, signal amplifying triode V3, resistance R 15, resistance R 17, resistance R 18, capacitor C 15, pressurizer VD3 and zero-sequence current detect instrument transformer L2;

Arc-detection instrument transformer L3 is serially connected on the live wire or zero line of AC power; Signal load resistance R 16 is connected in parallel on the two ends of arc-detection instrument transformer L3, the termination current-limiting resistance R23 of arc-detection instrument transformer L3, meet signal amplifying triode V3 again after, the signal analysis and processing circuit 6 of access control circuit board 1; This end also connects resistance R 15 after the parallel connection, capacitor C 14 again with the signal analysis and processing circuit 6 of the common port access control circuit board 1 of pressurizer VD3; The other end of arc-detection instrument transformer L3 is connected to the tie point of resistance R 17, resistance R 18;

Resistance R 18 and capacitor C 15 backs in parallel one end ground connection, the other end is with the signal analysis and processing circuit 6 of the negative electrode access control circuit board 1 of resistance R 17 series connection backs and pressurizer VD3; The plus earth of pressurizer VD3;

It is that string is imported, exports in the two-wire circuit in AC power that zero-sequence current detects instrument transformer L2; Zero-sequence current detects the signal output part of instrument transformer L2, the signal amplification circuit 5 of access control circuit board 1.

Described control circuit board 1 also comprises power circuit 4 and drive circuit 7; Fault-signal inserts described signal amplification circuit 5 and signal analysis and processing circuit 6, and output signal inserts trip gear 3.

Described trip gear 3 comprises a pair of moving contact, a pair of fixed contact and trip assembley therefor, its fixed contact links to each other with the incoming line of AC power, tripping coil in moving contact and the trip assembley therefor, the output line of AC power link to each other, and trip assembley therefor is by linking to each other with microprocessor in the signal analysis and processing circuit 6 behind the drive circuit;

Described trip gear 3 is the tripping mechanisms that need artificial forced resetting; Described microprocessor is the R89LPCL901 chip of tape comparator MCU; Transducer magnet ring among arc-detection instrument transformer L3, the zero-sequence current detection instrument transformer L2 is by permeability magnetic material--and the iron silica-alumina material is made;

Described power circuit comprises that a rectifier circuit and one are through the high withstand voltage linear power supply circuit after TL431 voltage reference module and high withstand voltage triode electric current amplify again after the rectifier bridge rectification.

Circuit working principle of the present invention is as follows:

As shown in Figure 2; the alternating current of 230V (120V); through a Leaded Ceramic Disc Capacitor C16, the piezo-resistance RY1 that absorbs surge, the high voltage surge protective circuit that Chip-R R21 forms by absorbing high-frequency; be connected to tripping coil L1 then (when having big electric current to produce in the circuit; it is open circuit that coil is threaded off); be connected to rectifier bridge VD1, interchange is converted into direct current, work in order to the supply circuit other parts.

That in parallel with rectifier bridge VD1 dc terminal is controllable silicon V1, and its anode and negative electrode are directly in parallel with rectifier bridge, and grid links to each other with resistance R 1 with capacitor C 1, and receives 5 pin of the microprocessor U2 in the signal analysis and processing circuit 6 by VD4.After grid was received an operation voltage signal that transmits from R1, the conducting at once of anode and negative electrode produced a big electric current and forces tripping coil L1 to thread off with protective circuit on the loop;

Resistance R 2 is with in parallel with rectifier bridge VD1 dc terminal again after light-emitting diode VD2 connects, and whether VD2 is used to refer to circuit and switches on.Whole circuit provides power supply by a power unit, and voltage is taken from the high direct voltage that rectifier bridge comes out.This high direct voltage is after resistance R 4 and R6 current limliting, supply with the anode of three end group quasi-mode piece U1, the Voltage Feedback of U1 by the G utmost point changes the internal resistance between A and the K, utilize the dividing potential drop of the internal resistance of R4, R6, R5 resistor network and U1 to regulate the voltage of anode A end, the G end feedback voltage of U1 is got by the R7 that is connected on the low-tension supply end, R8 dividing potential drop; The height of low voltage voltage changes the variation that directly has influence on dividing point, amplifies the purpose that negative feedback reaches voltage-regulation by U1.

Resistance R 5 and R4 dividing potential drop prevent the anode A overvoltage of start-up course U1 and damage U1; C3 provides one to exchange negative feedback, is used for preventing the U1 self-excitation.The U1 anode voltage offers the low-pressure end microelectronic circuits after too high withstand voltage triode V2 electric current amplifies; The collector series connection dropping resistor R3 of triode V2 is to reduce the thermal losses of V2; Power after the π filtering of the 3.6V direct current of V2 output through C4, R10, C5 composition and give signal analysis and processing circuit 6..

1 pin of microprocessor U2 in the signal analysis and processing circuit 6 connects power supply, and 2,3,4 pin are unsettled, the output of 5 pin; 7 pin of U2 are positive inputs of comparator, and 6 pin are that high-low level detects input, 8 pin ground connection.Determine after circuit has fault at U2, it can be exported a high level and give diode VD4 and resistance R 1, promptly offers actuating signal of grid of controllable silicon V1.Wherein whether microprocessor U2 has the potential pulse that reaches setting to judge by detecting, if there is the pulse that reaches setting to occur, then sending high level makes it drive trip gear 3 actions for drive circuit 7, cut off the electricity supply, stop power supply, and stopping to wait for 50~70ms, wait is counted again then; Do not occur if reach the pulse of setting, then do not send high level, microprocessor U2 returns original state and detects again.Here the foundation of microprocessor judges is whether signal pulse has the current half/second of arc more than or equal to 8 times, gives drive circuit 7 and then forces trip gear 3 to be threaded off if then send signal, cuts off the electricity supply and stops power supply.If signal pulse is less than current half/second that arc is arranged for 8 times, then counter empties, and returns MCU and waits for again.When overcurrent or leak current fault signal, microprocessor U2 can carry out processing and amplifying with sort signal, sends high level and gives drive circuit 7, and then make trip gear 3 actions, cuts off the electricity supply and stops power supply.

What link to each other with 6 pin of U2 is the leakage current testing circuit, comprises that U3 and zero-sequence current detect instrument transformer L2, and resistance R 9, R11, R12, R13, capacitor C 6, C7, C8, C9, C10, C11, C12 and triode V3.Current-limiting resistance R9, filter capacitor C6 link to each other with 8 pin of U3, for U3 provides power supply; 1 pin of U3 links to each other with ground by capacitor C 7, and C7 plays one and eliminates the comparator misoperation; 2 pin are connected in the two ends that zero-sequence current detects instrument transformer L2 by R13 with 1 pin; C8 and R12 are then in parallel with zero-sequence current detection instrument transformer L2, and C8 plays jamproof effect, and R12 is a signal load, and induced current is converted into voltage for sampling, and the size of R12 is determining the sensitivity of data sampling, and R13 then is the protective resistance of 2 pin input; 2 pin connect and insert 3 pin and ground connection after decoupling capacitor C10,4 pin and 5 pin meet decoupling capacitor C11; Insert between 6 pin and 7 pin and inhale the capacitor C 9 of making an uproar;

Zero-sequence current detection instrument transformer L2 detection is passed through its lead as no leaky, and then 7 pin of U3 are just exported a low level and given R11 (if any electric leakage, then 7 pin of U3 are just exported a high level and given R11); After the V3 paraphase is amplified, deliver to 6 pin of U2 and handle, need to judge whether to thread off for it.R14 and the C13 in addition that link to each other with 6 pin of U2, R14 mainly is to high level of 6 pin, C13 is one and exchanges decoupling capacitor, is used for absorbing interference signal.

What link to each other with 7 pin of U2 is electric arc, over-current detection circuit, and arc-detection instrument transformer L3 is serially connected on the live wire L or zero line N of AC power; Signal load resistance R 16 is connected in parallel on the two ends of arc-detection instrument transformer L3, behind the termination current-limiting resistance R23 of arc-detection instrument transformer L3, is admitted to 6 pin of the microprocessor U2 in the control circuit board 1 through signal amplifying triode V3; This end also connects the resistance R 15 after the parallel connection, 7 pin of the microprocessor U2 of capacitor C 14 in the common port 3 pin access control circuit boards 1 of pressurizer VD3; The other end of arc-detection instrument transformer L3 is connected to the tie point of resistance R 17, resistance R 18; Resistance R 18 and capacitor C 15 backs in parallel one end ground connection, the other end is with 1 pin of the microprocessor U2 of the negative electrode 2 pin access control circuit boards 1 of resistance R 17 series connection backs and pressurizer VD3, i.e. low-tension supply anode; The anode 1 pin ground connection of pressurizer VD3;

Whether there are electric arc and over-current phenomenon avoidance to produce in the arc-detection instrument transformer L3 testing circuit, if any then producing a current signal; C14 plays the effect of signal coupling, and C15 plays high-frequency coupling; R16 is a signal load, and induced current is converted into voltage for sampling; Pressurizer VD3 plays the overvoltage protection effect.Resistance R 17, R18 provide a dividing potential drop, allow arc-detection instrument transformer L3 float on the dividing point that (because comparative level is about 1.2V, signal magnitude does not have rule, and dividing potential drop can not be too high, high can cause circuit erroneous action, low can influence sensitivity.)。(C14 and C15 form communication channel, and R15 provides certain direct current to deliver to 7 pin of U2 through R15 and C14 behind the signal voltage stack dividing point voltage.), if signal polarity is opposite, then pass through anode 1 pin and the common port 3 pin bleed off electric currents of VD3; Perhaps when voltage signal is too high, common port 3 pin by VD3 and negative electrode 2 pin reach the effect that signal level is clamped down on to power positive end bleed off electric current.Arrive to a certain degree when electric current is excessive, the dividing potential drop of R23 and R11 makes the V3 conducting, and the low level of a some cycles appears in 6 pin of U2, and U2 forces V1 to drive and threads off.Here the connection of VD3 has multiple, the connection here is with general and to connect positive reversal connection diode different, it can guarantee to have removed otiose polarity reversing signal, but has guaranteed the maximum constraints (supply voltage+0.7V), make signal not decay or distortion in allowed band of useful signal.

Test circuit is made up of R19, R20 and Test Switchboard SW1.Rectifier bridge links to each other with 6 pin of U2 through the base stage that switch SW 1 meets R19, R20 access triode V3 again.SW1 is pressed when Test Switchboard, circuit is connected, the base stage of triode V3 obtains a signal, 6 pin to U2 transmit a low level, 5 pin of U2 are just exported the grid that a high level is given controllable silicon V1, and the conducting at once of the anode of controllable silicon V1 and negative electrode produces a big electric current on the loop, cause tripping coil L1 to thread off, power supply all cuts off.

Claims (7)

1. electric arc and earth leakage protective device; comprise the control circuit board (1) that contains signal amplification circuit (5) and signal analysis and processing circuit (6), the failure detector circuit (2) that links to each other with the signal input part of control circuit board (1), with the trip gear (3) that the signal output part of control circuit board (1) links to each other, it is characterized in that:
Described failure detector circuit (2) comprises that arc-detection instrument transformer (L3), signal load resistance (R16), current-limiting resistance (R23), signal coupling capacitance (C14), signal amplifying triode (V3), first resistance (R15), second resistance (R17), the 3rd resistance (R18), first electric capacity (C15), pressurizer (VD3) and zero-sequence current detect instrument transformer (L2);
Arc-detection instrument transformer (L3) is serially connected on the live wire (L) or zero line (N) of AC power; Signal load resistance (R16) is connected in parallel on the two ends of arc-detection instrument transformer (L3), one termination current-limiting resistance (R23) of arc-detection instrument transformer (L3), after connecing signal amplifying triode (V3) again, the signal analysis and processing circuit (6) of access control circuit board (1); This end also connects first resistance (R15) after the parallel connection, signal coupling capacitance (C14) again with the signal analysis and processing circuit (6) of the common port access control circuit board (1) of pressurizer (VD3); The other end of arc-detection instrument transformer (L3) is connected to the tie point of second resistance (R17), the 3rd resistance (R18);
After the 3rd resistance (R18) and first electric capacity (C15) parallel connection, an end ground connection, the other end with after second resistance (R17) series connection again with the signal analysis and processing circuit (6) of the negative electrode access control circuit board (1) of pressurizer (VD3); The plus earth of pressurizer (VD3);
Zero-sequence current detects instrument transformer (L2), is serially connected in AC power input, the output two-wire circuit; Zero-sequence current detects the signal output part of instrument transformer (L2), the signal amplification circuit (5) of access control circuit board (1).
2. electric arc as claimed in claim 1 and earth leakage protective device; it is characterized in that: described control circuit board (1) also comprises power circuit (4) and drive circuit (7); fault-signal inserts described signal amplification circuit (5) and signal analysis and processing circuit (6), and output signal inserts trip gear (3).
3. electric arc as claimed in claim 1 and earth leakage protective device; it is characterized in that: described trip gear (3) comprises a pair of moving contact (S11; S21), a pair of fixed contact (S12; S22) and trip assembley therefor; (S12 S22) links to each other moving contact (S11 to its fixed contact with the incoming line of AC power; S21) link to each other with tripping coil (L1), the output line of AC power in the trip assembley therefor, trip assembley therefor links to each other by drive circuit (7) back and the microprocessor in the signal analysis and processing circuit (6).
4. electric arc as claimed in claim 1 and earth leakage protective device is characterized in that: described trip gear (3) is the tripping mechanism of the artificial forced resetting of needs.
5. electric arc as claimed in claim 3 and earth leakage protective device is characterized in that: described microprocessor is the P89LPCL901 chip of tape comparator MCU.
6. electric arc as claimed in claim 1 and earth leakage protective device is characterized in that: the transducer magnet ring that described arc-detection instrument transformer (L3), zero-sequence current detect in the instrument transformer (L2) is made by the iron silica-alumina material.
7. electric arc as claimed in claim 1 and earth leakage protective device is characterized in that: described power circuit (4) comprises that a rectifier circuit and one are through the high withstand voltage linear power supply circuit after TL431 voltage reference module (U1) and high withstand voltage triode (V2) electric current amplify again after the rectifier bridge rectification.
CNB2004100669214A 2004-09-30 2004-09-30 Arc and leakage protector CN100370664C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNB2004100669214A CN100370664C (en) 2004-09-30 2004-09-30 Arc and leakage protector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNB2004100669214A CN100370664C (en) 2004-09-30 2004-09-30 Arc and leakage protector

Publications (2)

Publication Number Publication Date
CN1601842A CN1601842A (en) 2005-03-30
CN100370664C true CN100370664C (en) 2008-02-20

Family

ID=34666523

Family Applications (1)

Application Number Title Priority Date Filing Date
CNB2004100669214A CN100370664C (en) 2004-09-30 2004-09-30 Arc and leakage protector

Country Status (1)

Country Link
CN (1) CN100370664C (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100432683C (en) * 2005-03-31 2008-11-12 珠海格力电器股份有限公司 Fault arc detection method and protection circuit thereof
CN100384042C (en) * 2005-07-15 2008-04-23 蒋闯 Flashover leakage protector and protection method thereof
CN100452598C (en) * 2005-08-19 2009-01-14 珠海格力电器股份有限公司 Protection circuit for fault electric arc, and method for detecting fault electric arc
CN1960102B (en) * 2006-09-29 2010-10-06 蒋闯 Arc, earth leakage protection, and protection method
US20090154046A1 (en) * 2007-12-18 2009-06-18 Robinson Judy A Trip unit and electrical switching apparatus including a movable indicator to indicate selection of an arc reduction maintenance system current condition
KR20110083823A (en) * 2010-01-15 2011-07-21 삼성전자주식회사 Detecting circuit of arc noise, light source driving apparatus having the same and method of driving a light source using the same
DE102011078239A1 (en) * 2011-06-28 2013-01-03 Siemens Aktiengesellschaft Resetting an arc fault protection device
CN102611069A (en) * 2012-04-18 2012-07-25 天津市鸿远电气设备有限公司 Electric arc fault protector
CN104251945B (en) * 2013-06-28 2017-06-27 上海电科电器科技有限公司 arc fault detection device
CN103454582A (en) * 2013-09-03 2013-12-18 辽宁工程技术大学 Detection device for broken-down electric arcs of breaker
CN106449320B (en) * 2016-08-16 2018-08-14 华通机电股份有限公司 A kind of energy-saving residual action current breaker

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2044388U (en) * 1989-02-02 1989-09-13 张志国 Three function protective switch
US5103365A (en) * 1989-11-16 1992-04-07 Togami Electric Mfg. Co., Ltd. Downed conductor automatic detecting device
JPH10271663A (en) * 1997-03-26 1998-10-09 Toshiba Corp Protective relay device
CN2626105Y (en) * 2003-05-12 2004-07-14 无锡晶磊电子有限公司 Electric leakage protector
CN1511671A (en) * 2002-12-31 2004-07-14 徐洪泽 Anti-shock protector of full electronic intelligent electric arc welder
CN2762332Y (en) * 2004-09-30 2006-03-01 宁波习羽电子发展有限公司 Arc and earth leakage protective device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2044388U (en) * 1989-02-02 1989-09-13 张志国 Three function protective switch
US5103365A (en) * 1989-11-16 1992-04-07 Togami Electric Mfg. Co., Ltd. Downed conductor automatic detecting device
JPH10271663A (en) * 1997-03-26 1998-10-09 Toshiba Corp Protective relay device
CN1511671A (en) * 2002-12-31 2004-07-14 徐洪泽 Anti-shock protector of full electronic intelligent electric arc welder
CN2626105Y (en) * 2003-05-12 2004-07-14 无锡晶磊电子有限公司 Electric leakage protector
CN2762332Y (en) * 2004-09-30 2006-03-01 宁波习羽电子发展有限公司 Arc and earth leakage protective device

Also Published As

Publication number Publication date
CN1601842A (en) 2005-03-30

Similar Documents

Publication Publication Date Title
CN102315621B (en) Electric wire connection protecting device with self-checking function
US5963406A (en) Arc fault detector with circuit interrupter
CN105226817B (en) A kind of intelligent family breaker and its application method based on Internet of Things
CN101420116B (en) Intelligent integrated electricity leakage protection device
CN104577977A (en) Voltage and current switchable type electric leakage protection device
CN105182229B (en) The dynamic measurement of power switch actuation time and ac zero-crossing point accuracy control method and application
CN201590645U (en) AC input over-voltage and under-voltage protection device for electric apparatus
CN103208776A (en) Breaker circuit with fault self-detection function
CN201781263U (en) Electric-shock protection wall overcurrent leakage protection circuit of wall switch
CN1988099B (en) Leakage current detection breaker with fire-proof shield
CN204290310U (en) A kind of oppositely ground protection circuit and ground-fault interrupter
CN201682263U (en) Leakage protection device
CN103415972A (en) Methods, systems, and apparatus and for detecting parallel electrical arc faults
US9219360B2 (en) Safe quick disconnect leakage protector
CN101141060A (en) Auto-power-off control device
CN101900771A (en) RCD (Residual Current Device) detection device and detection method
CN201788245U (en) Online monitor device for service life of arrester with gaps
CN104617571A (en) Over-voltage over-current protector of electronic and electric equipment
CN205666605U (en) A type three -sphase four -wire system circuit breaker that leaks electricity
CN102005720B (en) Neutral line breakage detection protection method and device
CN201556927U (en) Electric leakage detection protecting circuit and electric leakage detection protector
CN202259980U (en) Plug with ground wire live protection mechanism
CN102623947B (en) A kind of earth leakage protective device with phase line handoff functionality
WO2019169904A1 (en) Low-cost input anti-overvoltage protection circuit
CN100358205C (en) All fault-current sensitive protection device

Legal Events

Date Code Title Description
PB01 Publication
C06 Publication
SE01 Entry into force of request for substantive examination
C10 Entry into substantive examination
GR01 Patent grant
C14 Grant of patent or utility model
PE01 Entry into force of the registration of the contract for pledge of patent right

Denomination of invention: Arc and leakage protector

Effective date of registration: 20160112

Granted publication date: 20080220

Pledgee: Ping An Bank Ltd Ningbo branch

Pledgor: Xiyu Electronic Development Co., Ltd., Ningbo

Registration number: 2016990000020

Denomination of invention: Arc and leakage protector

Effective date of registration: 20160112

Granted publication date: 20080220

Pledgee: Ping An Bank Ltd Ningbo branch

Pledgor: Xiyu Electronic Development Co., Ltd., Ningbo

Registration number: 2016990000020

PLDC Enforcement, change and cancellation of contracts on pledge of patent right or utility model
CP01 Change in the name or title of a patent holder

Address after: 315317, No. 6, development avenue, Qiaotou Industrial Zone, Zhejiang, Cixi

Patentee after: Ningbo Xi Yu electrical Polytron Technologies Inc

Address before: 315317, No. 6, development avenue, Qiaotou Industrial Zone, Zhejiang, Cixi

Patentee before: Xiyu Electronic Development Co., Ltd., Ningbo

Address after: 315317, No. 6, development avenue, Qiaotou Industrial Zone, Zhejiang, Cixi

Patentee after: Ningbo Xi Yu electrical Polytron Technologies Inc

Address before: 315317, No. 6, development avenue, Qiaotou Industrial Zone, Zhejiang, Cixi

Patentee before: Xiyu Electronic Development Co., Ltd., Ningbo

C56 Change in the name or address of the patentee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20080220

Termination date: 20190930

CF01 Termination of patent right due to non-payment of annual fee