CN110474293A - A kind of band detects automatically and the fire prevention of Self-resetting, earth leakage circuit-breaker and guard method - Google Patents
A kind of band detects automatically and the fire prevention of Self-resetting, earth leakage circuit-breaker and guard method Download PDFInfo
- Publication number
- CN110474293A CN110474293A CN201910882866.2A CN201910882866A CN110474293A CN 110474293 A CN110474293 A CN 110474293A CN 201910882866 A CN201910882866 A CN 201910882866A CN 110474293 A CN110474293 A CN 110474293A
- Authority
- CN
- China
- Prior art keywords
- resistance
- mutual inductor
- circuit
- inductor coil
- pin
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
- 230000002265 prevention Effects 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000001514 detection method Methods 0.000 claims abstract description 54
- 230000001681 protective effect Effects 0.000 claims abstract description 18
- 230000009467 reduction Effects 0.000 claims abstract description 17
- 230000001360 synchronised effect Effects 0.000 claims abstract description 9
- 239000003990 capacitor Substances 0.000 claims description 44
- 239000004065 semiconductor Substances 0.000 claims description 44
- 230000005611 electricity Effects 0.000 claims description 19
- 230000006837 decompression Effects 0.000 claims description 5
- 230000000087 stabilizing effect Effects 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 2
- 230000006870 function Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009993 protective function Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/06—Details with automatic reconnection
- H02H3/066—Reconnection being a consequence of eliminating the fault which caused disconnection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
- H02H3/32—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
A kind of band detects automatically and the fire prevention of Self-resetting, earth leakage circuit-breaker, including control chip, relay, reduction voltage circuit, power circuit, electric-leakage detection circuit, fiery arc detection circuit, city's electro-detection synchronous circuit and driving circuit；Electric-leakage detection circuit includes mutual inductor coil HGQ1, and two input lines of alternating current pass through mutual inductor coil HGQ1, and one end of mutual inductor coil HGQ1 is grounded, and the other end of mutual inductor coil HGQ1 is connect with the pin of control chip；Fiery arc detection circuit includes mutual inductor coil HGQ2, and an input line of alternating current passes through mutual inductor coil HGQ2, and one end of mutual inductor coil HGQ2 is grounded, and the other end of mutual inductor coil HGQ2 is connect with the pin of control chip；Reduction voltage circuit includes first resistor module, second resistance module and electronic switch module, first resistor module and second resistance block coupled in series.Above-mentioned protective switch has the function of earth leakage protective, flameproof protection and automatically resets.In addition the invention also discloses corresponding electric leakages, flameproof protection method.
Description
Technical field
The present invention relates to protective switch technical field, especially a kind of band detects automatically and the fire prevention of Self-resetting, electric leakage are protected
Shield switch and guard method.
Background technique
Earth leakage circuit-breaker on the market at present, has the following deficiencies:
First, when line voltage is too low, relay on-off alternating current is driven without enough energy, protective switch can not normal work
Make.
Second, earth leakage circuit-breaker is not directed to the function that fiery arc is detected and protects circuit.
Third, protective switch after a loss of power, when electric leakage or fiery arc releasing, can not automatically reset, need manual reset,
Often reset not in time can cause very big puzzlement to production and life, than the refrigerator if you need to starting in 24 hours, industrial equipment
Shut down the influence etc. to manufacturing schedule.
4th, the module that none is detected automatically for detection of electrical leakage mutual inductor itself, if detection of electrical leakage mutual inductor is certainly
Body damages, and can not work, then protective switch can not identify electric leakage and power off, and causes great security risk；
Therefore, it is necessary to improve.
Summary of the invention
Object of the present invention is in view of the above-mentioned problems, providing that a kind of band detects automatically and the fire prevention of Self-resetting, earth leakage protective are opened
Pass and guard method, in order to achieve the above objectives, the present invention adopts the following technical scheme:
A kind of band detects automatically and the fire prevention of Self-resetting, earth leakage circuit-breaker, including control chip, relay, carries out to alternating current
The reduction voltage circuit of decompression, for control chip provide power supply power circuit, to electric leakage detected electric-leakage detection circuit, to fire
Fiery arc detection circuit that arc is detected, city's electro-detection synchronous circuit that alternating current is detected and control relay on-off
Driving circuit；The input terminal of reduction voltage circuit is connected by the end of incoming cables of full-bridge rectification D2 and alternating current, the input terminal of power circuit with
The output end of reduction voltage circuit connects, and the output end of power circuit is connect with the power pins of control chip, and city's electro-detection synchronizes electricity
The input terminal on road is connect with alternating current input line, and the pin for controlling chip connect and monitors with the output end of city's electro-detection synchronous circuit
Current phase, control chip control the on-off of relay by driving circuit；The electric-leakage detection circuit includes mutual inductor coil
HGQ1, two input lines of alternating current pass through mutual inductor coil HGQ1, and one end of the mutual inductor coil HGQ1 is grounded, the mutual inductance
The other end of device coil HGQ1 is output end, and the pin for controlling chip connect with the output end of mutual inductor coil HGQ1 and collects leakage
Electric signal；The fire arc detection circuit includes mutual inductor coil HGQ2, and an input line of alternating current passes through mutual inductor coil HGQ2,
One end of the mutual inductor coil HGQ2 is grounded, and the other end of the mutual inductor coil HGQ2 is output end, controls drawing for chip
Foot connect with the output end of mutual inductor coil HGQ2 and collects fiery arc signal；The reduction voltage circuit includes first resistor module,
Two resistive modules and reception control chip signal and the electronic switch module for controlling first resistor module short circuit, first electricity
Hinder module and second resistance block coupled in series.
Further, the electric-leakage detection circuit further includes operational amplifying module, and the pin of the control chip passes through fortune
Amplification module is calculated to connect with the output end of mutual inductor coil HGQ1；The power circuit includes the output node D of output+5V voltage
With the output node E of output+24V voltage.
Further, the power circuit include resistance R10, zener diode ZD2, capacitor C4, zener diode ZD1 with
And electrolytic capacitor C1, resistance R10, zener diode ZD1 and electrolytic capacitor C1 are connected in parallel on the output end of reduction voltage circuit, diode
The cathode of ZD1 and the output end of reduction voltage circuit connect, the plus earth of zener diode ZD1, anode and the drop of electrolytic capacitor C1
The output end of volt circuit connects, the cathode ground connection of electrolytic capacitor C1；Zener diode ZD2 and capacitor C4 are connected in parallel on resistance R10's
The cathode of output end, zener diode ZD2 is connect with the output end of resistance R10, the plus earth of zener diode ZD2, capacitor
One end of C4 is connect with the cathode of zener diode ZD2, the other end ground connection of capacitor C4, the cathode of the zener diode ZD2
Output node D is formed, the cathode of the zener diode ZD1 forms output node E.
Further, the electric-leakage detection circuit further includes capacitor C5 and resistance R1, the capacitor C5 and resistance R1 in parallel
It is grounded in the output end of the output end of mutual inductor coil HGQ1, the capacitor C5, the operational amplifying module includes resistance R3, electricity
R18, resistance R17, resistance R19, resistance R20, resistance R21, diode D3 and operational amplifier Z2A are hindered, the resistance R3's
The output node D connection of input terminal and power circuit, resistance R18 and resistance R17 are arranged in series and are connected in parallel on electricity with diode D3
The output end of R3, the minus earth of diode D3 are hindered, the reverse input end of operational amplifier Z2A is connected in resistance R18 and resistance R17
Between, the non-inverting input terminal of operational amplifier Z2A is connect with the output end of mutual inductor coil HGQ1, and operational amplifier Z2A's is defeated
Outlet is connect by resistance R20 with the pin for controlling chip, and the output end of operational amplifier Z2A is sequentially connected resistance R19, resistance
R21 is simultaneously connect with the output node E of power circuit, and the positive power source terminal of operational amplifier Z2A is connected to resistance R19 and resistance R21
Between, the negative power end of operational amplifier Z2A is grounded.
Further, the fiery arc detection circuit further includes capacitor C2 and resistance R2, the capacitor C2 and resistance R2 in parallel
It is grounded in the output end of the output end of mutual inductor coil HGQ2, the capacitor C2.
It further, further include the mutual inductor coil detection circuit for detecting mutual inductor coil HGQ1, the mutual inductor coil
Detection circuit includes the triode Q5 of NPN type, and the collector of triode Q5 passes through the output end of connecting wire and full-bridge rectification D2
Connection, the connecting wire pass through mutual inductor coil HGQ1, and the emitter of the triode Q5 is grounded, the base of the triode Q5
Pole is connect with the pin of control chip.
Further, city's electro-detection synchronous circuit includes the resistance R8, resistance R8 being connected at control chip pin
Another termination alternating current a wherein input line；The electronic switch module includes the triode Q4 and NPN type of positive-negative-positive
Triode Q2, the emitter of the triode Q4 are connect with the input terminal of first resistor module, the collector of the triode Q4
It is connect with the output end of first resistor module, the base stage of the triode Q4 is connect with the collector of triode Q2, three pole
The base stage of pipe Q2 is connect with the pin of control chip, the emitter ground connection of triode Q2；The electronic switch module further includes electricity
R23, resistance R24 and resistance R26, the first resistor module and second resistance block coupled in series are hindered in the output of full-bridge rectification
End, the first resistor module includes resistance R7 and resistance R14 parallel with one another, and the second resistance module includes parallel with one another
Resistance R4 and resistance R6, the emitter of triode Q4 connect with the input terminal of resistance R14, the collector and resistance of triode Q4
The output end of R14 connects, and the base stage of triode Q4 is connect by resistance R23 with the collector of triode Q2, the triode Q2
Base stage connect by resistance R24 with the pin for controlling chip, the output end of full-bridge rectification D2 passes through resistance R26 and triode Q2
Base stage connection.
Further, the relay is 24V relay, and the relay includes control pin K1, control pin K2, public affairs
Pin and contact switch K3 and contact switch K4 altogether, the output node E connection of the common pin and power circuit, the touching
Point switch K3 and contact switch K4 is separately positioned on two output lines of alternating current, and the driving circuit includes metal-oxide-semiconductor Q1, MOS
Pipe Q3, diode D4, diode D1, resistance R5, resistance R15, resistance R12 and resistance R16；A termination control core of resistance R5
The pin of piece, the grid of another termination metal-oxide-semiconductor Q1 of resistance R5, the control pin K1 of the drain electrode contact relay of metal-oxide-semiconductor Q1, two poles
The anode of pipe D4 is connect with the drain electrode of metal-oxide-semiconductor Q1, and the cathode of diode D4 and the common pin of relay connect, resistance R15's
The grid of one termination metal-oxide-semiconductor Q1, the other end ground connection of resistance R15；The pin of a termination control chip of resistance R12, resistance R12
Another termination metal-oxide-semiconductor Q3 grid, metal-oxide-semiconductor Q3 drain electrode contact relay control pin K2, diode D1 anode and MOS
The drain electrode of pipe Q3 connects, and the cathode of diode D1 and the common pin of relay connect, a termination metal-oxide-semiconductor Q3's of resistance R16
Grid, the other end ground connection of resistance R16.
A kind of earth leakage protecting method, two input lines of alternating current also cross mutual inductor coil HGQ1, wherein have one it is right
When ground generates electric leakage, mutual inductor coil HGQ1 output voltage, control chip detects the voltage by pin and carries out judgement knowledge
Not, determination is to leak electricity, and issues cut-offing instruction, metal-oxide-semiconductor Q1 is connected by driving circuit in control chip, to make relay control
Contact switch processed disconnects, and disconnects the alternating current of input, and after electric leakage releases, metal-oxide-semiconductor Q3 is connected by driving circuit in control chip,
Relay is connected, alternating current is restored automatically.
One input line of a kind of flameproof protection method, alternating current passes through mutual inductor coil HGQ2, and output circuit is connected
Under fiery arc, arc in parallel fiery arc when, after control chip is by continuous six cycle detection of pin to above-mentioned fiery arc, controls chip and pass through
Metal-oxide-semiconductor Q1 is connected in driving circuit, to make the alternating current of relay disconnection input, after route fire arc fault restoration, controls core
Metal-oxide-semiconductor Q3 is connected by driving circuit in piece, relay is connected, protective switch automatically resets.
By adopting the above technical scheme, can reach it is following the utility model has the advantages that
Alternating current is inputted, is rectified by full-bridge rectification D2, R7, R14 and R4 and R6 decompression.By zener diode ZD1 and electric capacity of voltage regulation
C1 filters acquisition+24V voltage to drive relay, while by R10, ZD2 and C4 acquisition+5V is to single-chip microcontroller Z1 to power supply.
When driving relay, single-chip microcontroller issues control signal, by the electronic switch module that Q4 and Q2 are formed make R7 and
R14 short circuit, relay obtain enough voltage to drive the on-off of alternating current, and therefore, city is electrically accessed lower input voltage
Relay can be driven to work.
It is provided with electric-leakage detection circuit, two input lines of mains are also cross mutual inductor coil HGQ1, when wherein having
One generates mutual inductor coil HGQ1 output voltage when leaking electricity over the ground, and single-chip microcontroller detects voltage when progress by pin RA2
Judgement identification, determination is to leak electricity, and issues the instruction of power-off, metal-oxide-semiconductor Q1 is connected by driving circuit, to make relay
The disconnection of contact switch K3 and contact switch K4 are controlled, and then disconnects the alternating current of input, reaches earth leakage protective function, monolithic
After machine examination measures electric leakage releasing, metal-oxide-semiconductor Q3 is connected by driving circuit in single-chip microcontroller, relay is connected, power supply obtains automatically
Restore, which has the function of restoring power supply automatically, is not necessarily to manual reset.
The working principle of mutual inductor coil detection circuit is as follows, by resistance R11, triode Q5 concatenate connecting wire around
Mutual inductor coil HGQ1, turn-on transistor Q5 are crossed, so that electric current is generated, by monolithic machine testing.If mutual inductor coil HGQ1 is just
Often effective, then after turn-on transistor Q5, mutual inductor coil HGQ1 can generate electric current, and single-chip microcontroller pin RA2 can receive voltage
Signal, if single-chip microcontroller does not receive voltage signal, then it is assumed that mutual inductor coil HGQ1 failure to disconnect output alternating current, refers to
Show that lamp is glittering, achievees the purpose that protect lives and properties.Since the input of mutual inductor detection circuit terminates at the defeated of full-bridge rectification D2
Outlet, therefore after triode Q5 conducting, even if zero curve and firewire are reversed, if mutual inductor coil HGQ1 be it is normal effective, can be with
Pulse is generated, so that single-chip microcontroller pin receives voltage signal.
When route generates fiery arc, route can locally generate 4000 DEG C of high temperature in 2 seconds, there is the peace that fire occurs
Full hidden danger, therefore, when under the fiery arc (bad arc) of output circuit generation series connection, fiery arc (bad arc) in parallel arc, single-chip microcontroller pass through pin
When continuous six cycle detection is to above-mentioned bad arc, metal-oxide-semiconductor Q1 is connected by driving circuit in single-chip microcontroller, so that it is defeated to disconnect relay
The alternating current entered prevents the generation of route fire.When route fire arc fault restoration, protective switch automatically resets.
To sum up, protective switch of the invention, have earth leakage protective, flameproof protection, automatically reset it is automatic with mutual inductor coil
The function of detection, and can work under low voltage environment.
Detailed description of the invention
Fig. 1 is circuit diagram of the invention.
Specific embodiment
As shown in Figure 1, a kind of band detects automatically and the fire prevention of Self-resetting, earth leakage circuit-breaker, including control chip, relay
Device, full-bridge rectification D2, the reduction voltage circuit that alternating current is depressured, the power circuit that power supply is provided for control chip, to leak electricity into
The electric-leakage detection circuit of row detection, the fiery arc detection circuit detected to fiery arc, the city's electro-detection detected to alternating current are same
Step circuit, display circuit, control chip auxiliary circuit and the driving circuit for controlling relay on-off, control chip is preferably single
Piece machine.
Two input lines of alternating current are respectively firewire AC1-IN and zero curve AC2-IN.
City's electro-detection synchronous circuit includes the resistance R8 being connected at control chip pin RA1, another termination of resistance R8
One input line of alternating current, in embodiment, the input line are firewire AC1-IN, control the pin RA8 monitoring firewire of chip
The current phase of AC1-IN；
Filter capacitor RC1 is equipped between firewire AC1-IN and zero curve AC2-IN.
Reduction voltage circuit includes first resistor module, second resistance module and receives control chip signal and control the first electricity
Hinder the electronic switch module of module short circuit.
In the output end of full-bridge rectification D2, first resistor module includes phase for first resistor module and second resistance block coupled in series
Mutually in parallel resistance R7 and resistance R14, second resistance module include resistance R4 and resistance R6 parallel with one another,
Electronic switch module includes resistance R23, resistance R24, resistance R26, the triode Q of positive-negative-positive and the triode of NPN type
The emitter of Q2, triode Q4 are connect with the input terminal of first resistor module, the collector and first resistor module of triode Q4
Output end connection, the base stage of triode Q4 connect with the collector of triode Q2, the base stage of triode Q2 with control chip
Pin RC5 connection, the emitter ground connection of triode Q2.
Specifically, the emitter of triode Q4 is connect with the input terminal of resistance R14, the collector and resistance of triode Q4
The output end of R14 connects, and the base stage of triode Q4 is connect by resistance R23 with the collector of triode Q2, the base of triode Q2
Pole is connect by resistance R24 with the pin RC5 for controlling chip, and the output end of full-bridge rectification D2 passes through resistance R26 and triode Q2
Base stage connection.
Power circuit includes resistance R10, zener diode ZD2, capacitor C4, zener diode ZD1 and electrolytic capacitor C1,
Resistance R10, zener diode ZD1 and electrolytic capacitor C1 are connected in parallel on the output end of reduction voltage circuit, the cathode and drop of diode ZD1
The output end of volt circuit connects, the plus earth of zener diode ZD1, the output end of the anode and reduction voltage circuit of electrolytic capacitor C1
Connection, the cathode ground connection of electrolytic capacitor C1；Zener diode ZD2 and capacitor C4 is connected in parallel on the output end of resistance R10, two pole of pressure stabilizing
The cathode of pipe ZD2 is connect with the output end of resistance R10, the plus earth of zener diode ZD2, one end of capacitor C4 and pressure stabilizing two
The cathode of pole pipe ZD2 connects, and the other end ground connection of capacitor C4, the cathode of zener diode ZD2 forms output node D, output section
Point D output+5V voltage, the cathode of zener diode ZD1 form output node E, and output node E output+24V voltage controls core
The pin VD of piece is connect with output node D, provides+5V DC voltage for control chip.
Electric-leakage detection circuit includes capacitor C5, resistance R1, mutual inductor coil HGQ1 and operational amplifying module, the fire of alternating current
Line and zero curve pass through mutual inductor coil HGQ1, and one end of mutual inductor coil HGQ1 is grounded, and the other end of mutual inductor coil HGQ1 is
Output end, the output end of mutual inductor coil HGQ1 are connect by operational amplifying module with the pin RA2 for controlling chip, capacitor C5 with
Resistance R1 is connected in parallel on the output end of mutual inductor coil HGQ1, the output end ground connection of capacitor C5.
Operational amplifying module includes resistance R3, resistance R18, resistance R17, resistance R19, resistance R20, resistance R21, diode
The output node D connection of the input terminal and power circuit of D3 and operational amplifier Z2A, resistance R3, resistance R18 and resistance R17
It is arranged in series and is connected in parallel on diode D3 the output end of resistance R3, the minus earth of diode D3, operational amplifier Z2A's is anti-
It is connected between resistance R18 and resistance R17 to input terminal, the non-inverting input terminal of operational amplifier Z2A is with mutual inductor coil HGQ1's
The output end of output end connection, operational amplifier Z2A is connect by resistance R20 with the pin for controlling chip, operational amplifier Z2A
Output end be sequentially connected resistance R19, resistance R21 and connect with the output node E of power circuit, operational amplifier Z2A is just
Power end is connected between resistance R19 and resistance R21, the negative power end ground connection of operational amplifier Z2A.
Fiery arc detection circuit includes mutual inductor coil HGQ2, capacitor C2 and resistance R2, and the zero curve of alternating current passes through mutual inductor line
HGQ2 is enclosed, one end ground connection of mutual inductor coil HGQ2, the other end of mutual inductor coil HGQ2 is output end, mutual inductor coil HGQ2
Output end connect with the pin RA0 of control chip, capacitor C2 and resistance R2 are connected in parallel on the output end of mutual inductor coil HGQ2, electric
Hold the output end ground connection of C2.
Relay is 24V relay, and relay includes that control pin K1, control pin K2, common pin and contact are opened
K3 and contact switch K4, the output node E connection of common pin and power circuit are closed, contact switch K3 is arranged on firewire, touching
Point switch K4 is arranged on zero curve.
Driving circuit includes metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q3, diode D4, diode D1, resistance R5, resistance R15, resistance R12
And resistance R16；The pin RC3 of a termination control chip of resistance R5, the grid of another termination metal-oxide-semiconductor Q1 of resistance R5, MOS
The anode of control the pin K1, diode D4 of the drain electrode contact relay of pipe Q1 are connect with the drain electrode of metal-oxide-semiconductor Q1, the yin of diode D4
The connection of the common pin of pole and relay, the grid of a termination metal-oxide-semiconductor Q1 of resistance R15, the other end ground connection of resistance R15；Electricity
The pin RA6 of a termination control chip of R12, the grid of another termination metal-oxide-semiconductor Q3 of resistance R12 are hindered, the drain electrode of metal-oxide-semiconductor Q3 connects
The anode of control the pin K2, diode D1 of relay are connect with the drain electrode of metal-oxide-semiconductor Q3, the cathode of diode D1 and relay
Common pin connection, the grid of a termination metal-oxide-semiconductor Q3 of resistance R16, the other end ground connection of resistance R16.
Control chip auxiliary circuit includes that control chip is provided with auxiliary circuit, and control chip auxiliary circuit includes capacitor
C3, the pin VD for controlling chip are grounded by capacitor C3, and the pin RA7 for controlling chip passes through switch ground connection.
It further include the mutual inductor coil detection circuit for detecting mutual inductor coil HGQ1, mutual inductance as a preferred scheme
Device Coil Detector circuit includes the triode Q5, resistance R11 and resistance R13 of NPN type, and the collector of triode Q5 is led by connection
Line is connect with the output end of full-bridge rectification D2, and connecting wire passes through mutual inductor coil HGQ1, and resistance R11 is connected to connecting wire
On, the emitter of triode Q5 is grounded, and the base stage of triode Q5 is connect by resistance R13 with the pin RA4 for controlling chip.
Display circuit includes resistance R9 and Light-emitting diode LED 1, and the pin RC2 for controlling chip is sequentially connected resistance R9, just
To setting Light-emitting diode LED 1 and be grounded, when detect mutual inductor coil HGQ1 failure when, protective switch disconnect, indicator light
It is glittering, to achieve the purpose that protect lives and properties.
Guard method using above-mentioned protective switch is as follows:
Earth leakage protecting method, two input lines of alternating current are also cross mutual inductor coil HGQ1, wherein there is one to generate leakage over the ground
When electric, mutual inductor coil HGQ1 output voltage, chip detects the voltage by pin and carries out judgement identification for control, and determination is
Electric leakage then issues cut-offing instruction, and metal-oxide-semiconductor Q1 is connected by driving circuit in control chip, so that relay be made to control contact switch
It disconnects, disconnects the alternating current of input, after electric leakage releases, metal-oxide-semiconductor Q3 is connected by driving circuit in control chip, leads relay
Logical, alternating current is restored automatically.
Fiery arc guard method, an input line of alternating current pass through mutual inductor coil HGQ2, output circuit occur to connect fiery arc,
Under fire arc in parallel arc when, after control chip is by continuous six cycle detection of pin to above-mentioned fiery arc, controls chip and pass through driving
Metal-oxide-semiconductor Q1 is connected in circuit, to make the alternating current of relay disconnection input, after route fire arc fault restoration, control chip is logical
Metal-oxide-semiconductor Q3 is connected in overdrive circuit, relay is connected, protective switch automatically resets.
By adopting the above technical scheme, can reach it is following the utility model has the advantages that
Alternating current is inputted, is rectified by full-bridge rectification D2, R7, R14 and R4 and R6 decompression.By zener diode ZD1 and electric capacity of voltage regulation
C1 filters acquisition+24V voltage to drive relay, while by R10, ZD2 and C4 acquisition+5V is to single-chip microcontroller Z1 to power supply.
When driving relay, single-chip microcontroller issues control signal, by the electronic switch module that Q4 and Q2 are formed make R7 and
R14 short circuit, relay obtain enough voltage to drive the on-off of alternating current, and therefore, city is electrically accessed lower input voltage
Relay can be driven to work.
It is provided with electric-leakage detection circuit, two input lines of mains are also cross mutual inductor coil HGQ1, when wherein having
One generates mutual inductor coil HGQ1 output voltage when leaking electricity over the ground, and single-chip microcontroller detects voltage when progress by pin RA2
Judgement identification, determination is to leak electricity, and issues the instruction of power-off, metal-oxide-semiconductor Q1 is connected by driving circuit, to make relay
The disconnection of contact switch K3 and contact switch K4 are controlled, and then disconnects the alternating current of input, reaches earth leakage protective function, monolithic
After machine examination measures electric leakage releasing, metal-oxide-semiconductor Q3 is connected by driving circuit in single-chip microcontroller, relay is connected, power supply obtains automatically
Restore, which has the function of restoring power supply automatically, is not necessarily to manual reset.
The working principle of mutual inductor coil detection circuit is as follows, by resistance R11, triode Q5 concatenate connecting wire around
Mutual inductor coil HGQ1, turn-on transistor Q5 are crossed, so that electric current is generated, by monolithic machine testing.If mutual inductor coil HGQ1 is just
Often effective, then after turn-on transistor Q5, mutual inductor coil HGQ1 can generate electric current, and single-chip microcontroller pin RA2 can receive voltage
Signal, if single-chip microcontroller does not receive voltage signal, then it is assumed that mutual inductor coil HGQ1 failure to disconnect output alternating current, refers to
Show that lamp is glittering, achievees the purpose that protect lives and properties.Since the input of mutual inductor detection circuit terminates at the defeated of full-bridge rectification D2
Outlet, therefore after triode Q5 conducting, even if zero curve and firewire are reversed, if mutual inductor coil HGQ1 be it is normal effective, can be with
Pulse is generated, so that single-chip microcontroller pin receives voltage signal.
When route generates fiery arc, route can locally generate 4000 DEG C of high temperature in 2 seconds, there is the peace that fire occurs
Full hidden danger, therefore, when under the fiery arc (bad arc) of output circuit generation series connection, fiery arc (bad arc) in parallel arc, single-chip microcontroller pass through pin
When continuous six cycle detection is to above-mentioned bad arc, metal-oxide-semiconductor Q1 is connected by driving circuit in single-chip microcontroller, so that it is defeated to disconnect relay
The alternating current entered prevents the generation of route fire.When route fire arc fault restoration, protective switch automatically resets.
To sum up, protective switch of the invention, have earth leakage protective, flameproof protection, automatically reset it is automatic with mutual inductor coil
The function of detection, and can work under low voltage environment.
These are only the preferred embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art
For member, the present invention can have various changes, combination and variation.All within the spirits and principles of the present invention, made any
Modification, equivalent replacement, improvement etc., should be included within scope of the presently claimed invention.
Claims (10)
1. a kind of band detects automatically and the fire prevention of Self-resetting, earth leakage circuit-breaker, it is characterised in that: including controlling chip, relay
Device, provides the power circuit of power supply, the electric leakage detected to electric leakage for control chip at the reduction voltage circuit being depressured to alternating current
Detection circuit, the fiery arc detection circuit that fiery arc is detected, city's electro-detection synchronous circuit that alternating current is detected and control
The driving circuit of relay on-off processed；
The input terminal of reduction voltage circuit is connected by the end of incoming cables of full-bridge rectification D2 and alternating current, the input terminal and decompression electricity of power circuit
The output end on road connects, and the output end of power circuit is connect with the power pins for controlling chip, city's electro-detection synchronous circuit it is defeated
Enter end to connect with alternating current input line, controls the pin of chip and the output end of city's electro-detection synchronous circuit is connect and monitoring current phase
Position, control chip control the on-off of relay by driving circuit；
The electric-leakage detection circuit includes mutual inductor coil HGQ1, and two input lines of alternating current pass through mutual inductor coil HGQ1, institute
One end ground connection of mutual inductor coil HGQ1 is stated, the other end of the mutual inductor coil HGQ1 is output end, controls the pin of chip
It is connect with the output end of mutual inductor coil HGQ1 and collects electric leakage signal；
The fire arc detection circuit includes mutual inductor coil HGQ2, and an input line of alternating current passes through mutual inductor coil HGQ2, institute
One end ground connection of mutual inductor coil HGQ2 is stated, the other end of the mutual inductor coil HGQ2 is output end, controls the pin of chip
It is connect with the output end of mutual inductor coil HGQ2 and collects fiery arc signal；
The reduction voltage circuit includes first resistor module, second resistance module and receives control chip signal and control the first electricity
Hinder the electronic switch module of module short circuit, the first resistor module and second resistance block coupled in series.
2. band according to claim 1 detects automatically and the fire prevention of Self-resetting, earth leakage circuit-breaker, it is characterised in that: institute
Stating electric-leakage detection circuit further includes operational amplifying module, and the pin of the control chip passes through operational amplifying module and mutual inductor line
Enclose the output end connection of HGQ1；The power circuit includes the output of the output node D and output+24V voltage of output+5V voltage
Node E.
3. band according to claim 2 detects automatically and the fire prevention of Self-resetting, earth leakage circuit-breaker, it is characterised in that: institute
Stating power circuit includes resistance R10, zener diode ZD2, capacitor C4, zener diode ZD1 and electrolytic capacitor C1, resistance
R10, zener diode ZD1 and electrolytic capacitor C1 are connected in parallel on the output end of reduction voltage circuit, the cathode and decompression electricity of diode ZD1
The output end on road connects, the plus earth of zener diode ZD1, and the anode of electrolytic capacitor C1 connects with the output end of reduction voltage circuit
It connects, the cathode ground connection of electrolytic capacitor C1；Zener diode ZD2 and capacitor C4 is connected in parallel on the output end of resistance R10, zener diode
The cathode of ZD2 is connect with the output end of resistance R10, the plus earth of zener diode ZD2, one end and two pole of pressure stabilizing of capacitor C4
The cathode of pipe ZD2 connects, and the other end ground connection of capacitor C4, the cathode of the zener diode ZD2 forms output node D, described
The cathode of zener diode ZD1 forms output node E.
4. band according to claim 2 detects automatically and the fire prevention of Self-resetting, earth leakage circuit-breaker, it is characterised in that: institute
Stating electric-leakage detection circuit further includes that capacitor C5 and resistance R1, the capacitor C5 and resistance R1 are connected in parallel on the defeated of mutual inductor coil HGQ1
Outlet, the output end ground connection of the capacitor C5, the operational amplifying module includes resistance R3, resistance R18, resistance R17, resistance
R19, resistance R20, resistance R21, the input terminal of diode D3 and operational amplifier Z2A, the resistance R3 and power circuit
Output node D connection, resistance R18 and resistance R17 are arranged in series and are connected in parallel on the output end of resistance R3, diode with diode D3
The minus earth of D3, the reverse input end of operational amplifier Z2A are connected between resistance R18 and resistance R17, operational amplifier Z2A
Non-inverting input terminal connect with the output end of mutual inductor coil HGQ1, the output end of operational amplifier Z2A passes through resistance R20 and control
The pin of coremaking piece connects, and the output end of operational amplifier Z2A is sequentially connected resistance R19, resistance R21 and defeated with power circuit
Egress E connection, the positive power source terminal of operational amplifier Z2A are connected between resistance R19 and resistance R21, operational amplifier Z2A's
Negative power end ground connection.
5. band according to claim 1 detects automatically and the fire prevention of Self-resetting, earth leakage circuit-breaker, it is characterised in that: institute
Stating fiery arc detection circuit further includes that capacitor C2 and resistance R2, the capacitor C2 and resistance R2 are connected in parallel on mutual inductor coil HGQ2's
Output end, the output end ground connection of the capacitor C2.
6. band according to claim 1 detects automatically and the fire prevention of Self-resetting, earth leakage circuit-breaker, it is characterised in that: also
Mutual inductor coil detection circuit including detecting mutual inductor coil HGQ1, the mutual inductor coil detection circuit includes NPN type
The collector of triode Q5, triode Q5 are connect by connecting wire with the output end of full-bridge rectification D2, and the connecting wire is worn
Cross mutual inductor coil HGQ1, the emitter ground connection of the triode Q5, the base stage of the triode Q5 and the pin of control chip
Connection.
7. band according to claim 1 detects automatically and the fire prevention of Self-resetting, earth leakage circuit-breaker, it is characterised in that: institute
Stating city's electro-detection synchronous circuit includes the resistance R8 being connected at control chip pin, and another termination alternating current of resistance R8 is wherein
One input line；
The electronic switch module includes the triode Q4 of the positive-negative-positive and triode Q2 of NPN type, the transmitting of the triode Q4
Pole is connect with the input terminal of first resistor module, and the collector of the triode Q4 is connect with the output end of first resistor module,
The base stage of the triode Q4 is connect with the collector of triode Q2, and the base stage of the triode Q2 and the pin of control chip connect
It connects, the emitter ground connection of triode Q2；
The electronic switch module further includes resistance R23, resistance R24 and resistance R26, the first resistor module and the second electricity
Block coupled in series is hindered in the output end of rectification module, and the first resistor module includes resistance R7 and resistance R14 parallel with one another, institute
Stating second resistance module includes resistance R4 and resistance R6 parallel with one another, the input terminal of the emitter and resistance R14 of triode Q4
Connection, the collector of triode Q4 are connect with the output end of resistance R14, and the base stage of triode Q4 passes through resistance R23 and triode
The collector of Q2 connects, and the base stage of the triode Q2 is connect by resistance R24 with the pin for controlling chip, full-bridge rectification D2's
Output end is connect by resistance R26 with the base stage of triode Q2.
8. band according to claim 2 detects automatically and the fire prevention of Self-resetting, earth leakage circuit-breaker, it is characterised in that: institute
Stating relay is 24V relay, and the relay includes control pin K1, control pin K2, common pin and contact switch
The output node E connection of K3 and contact switch K4, the common pin and power circuit, the contact switch K3 and contact switch
K4 is separately positioned on two output lines of alternating current, and the driving circuit includes metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q3, diode D4, two poles
Pipe D1, resistance R5, resistance R15, resistance R12 and resistance R16；The pin of a termination control chip of resistance R5, resistance R5's
The grid of another termination metal-oxide-semiconductor Q1, the anode and metal-oxide-semiconductor of control the pin K1, diode D4 of the drain electrode contact relay of metal-oxide-semiconductor Q1
The drain electrode of Q1 connects, and the cathode of diode D4 and the common pin of relay connect, the grid of a termination metal-oxide-semiconductor Q1 of resistance R15
Pole, the other end ground connection of resistance R15；
The pin of a termination control chip of resistance R12, the grid of another termination metal-oxide-semiconductor Q3 of resistance R12, the leakage of metal-oxide-semiconductor Q3
The anode of control the pin K2, diode D1 of pole contact relay are connect with the drain electrode of metal-oxide-semiconductor Q3, the cathode and relay of diode D1
The common pin of device connects, the grid of a termination metal-oxide-semiconductor Q3 of resistance R16, the other end ground connection of resistance R16.
9. a kind of earth leakage protecting method, it is characterised in that: two input lines of alternating current also cross mutual inductor coil HGQ1, wherein
There is one when generating electric leakage over the ground, mutual inductor coil HGQ1 output voltage controls chip and by pin detects that the voltage is gone forward side by side
Row judgement identification, determination is to leak electricity, and issues cut-offing instruction, metal-oxide-semiconductor Q1 is connected by driving circuit in control chip, to make
Relay controls contact switch and disconnects, and disconnects the alternating current of input, and after electric leakage releases, controlling chip by driving circuit makes MOS
Pipe Q3 conducting, is connected relay, alternating current is restored automatically.
10. a kind of flameproof protection method, it is characterised in that: an input line of alternating current passes through mutual inductor coil HGQ2, output electricity
Road occur to connect under fiery arc, fiery arc in parallel arc when, after control chip is by continuous six cycle detection of pin to above-mentioned fiery arc, control
Metal-oxide-semiconductor Q1 is connected by driving circuit in coremaking piece, so that relay be made to disconnect the alternating current inputted, route fire arc fault restoration
Afterwards, metal-oxide-semiconductor Q3 is connected by driving circuit in control chip, relay is connected, protective switch automatically resets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910882866.2A CN110474293A (en) | 2019-09-18 | 2019-09-18 | A kind of band detects automatically and the fire prevention of Self-resetting, earth leakage circuit-breaker and guard method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910882866.2A CN110474293A (en) | 2019-09-18 | 2019-09-18 | A kind of band detects automatically and the fire prevention of Self-resetting, earth leakage circuit-breaker and guard method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110474293A true CN110474293A (en) | 2019-11-19 |
Family
ID=68516295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910882866.2A Pending CN110474293A (en) | 2019-09-18 | 2019-09-18 | A kind of band detects automatically and the fire prevention of Self-resetting, earth leakage circuit-breaker and guard method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110474293A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112103930A (en) * | 2020-10-15 | 2020-12-18 | 广东骉马机器人科技有限公司 | Safe power utilization system and protection method thereof |
| CN112467841A (en) * | 2020-11-25 | 2021-03-09 | 厦门著赫电子科技有限公司 | Rifle system control circuit charges |
| CN112865012A (en) * | 2021-03-01 | 2021-05-28 | 合肥依科普工业设备有限公司 | Electric arc fire protection system |
| CN115275961A (en) * | 2022-08-18 | 2022-11-01 | 宁波奥克斯电气股份有限公司 | Three-phase power supply misconnection protection circuit and air conditioner |
-
2019
- 2019-09-18 CN CN201910882866.2A patent/CN110474293A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112103930A (en) * | 2020-10-15 | 2020-12-18 | 广东骉马机器人科技有限公司 | Safe power utilization system and protection method thereof |
| CN112467841A (en) * | 2020-11-25 | 2021-03-09 | 厦门著赫电子科技有限公司 | Rifle system control circuit charges |
| CN112467841B (en) * | 2020-11-25 | 2022-12-27 | 厦门著赫电子科技有限公司 | Rifle system control circuit charges |
| CN112865012A (en) * | 2021-03-01 | 2021-05-28 | 合肥依科普工业设备有限公司 | Electric arc fire protection system |
| CN115275961A (en) * | 2022-08-18 | 2022-11-01 | 宁波奥克斯电气股份有限公司 | Three-phase power supply misconnection protection circuit and air conditioner |
| CN115275961B (en) * | 2022-08-18 | 2024-07-16 | 宁波奥克斯电气股份有限公司 | Three-phase power supply misconnection protection circuit and air conditioner |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110474293A (en) | A kind of band detects automatically and the fire prevention of Self-resetting, earth leakage circuit-breaker and guard method | |
| CN108761265B (en) | Electric-leakage detection circuit period system safety testing device and its detection method | |
| CN104767173B (en) | Ground wire voltage exception earth leakage protective device is detected without IC optocouplers | |
| CN211629848U (en) | Take earth leakage protection circuit of self-checking function | |
| CN210742470U (en) | Power equipment ground connection detection protection system | |
| CN104053254A (en) | Electric heating protection circuit and protection method | |
| CN104577971B (en) | Power off trip protection plug | |
| CN106711938A (en) | Leakage protector | |
| CN202940564U (en) | Three-phase leakage circuit breaker | |
| CN102638024B (en) | Interruption line protector | |
| CN110474292A (en) | A kind of band detects automatically and the earth leakage circuit-breaker of Self-resetting and guard method | |
| CN110474294A (en) | A kind of Self-resetting Flameproof protection switch and guard method | |
| CN206832916U (en) | One kind input ground line detection circuit | |
| CN205752826U (en) | A kind of attaching plug detecting supply socket state | |
| CN104868444A (en) | Intelligent wireless network type leakage protector | |
| CN103296639B (en) | A kind of leakage warning and protective circuit | |
| CN208654220U (en) | A kind of source-drain warning device | |
| CN203243023U (en) | Leakage alarm and protection circuit | |
| CN210327001U (en) | Fireproof and leakage protection switch with automatic detection and self-reset functions | |
| KR101302123B1 (en) | Earth leakage breaker of automatic recovery type | |
| CN201733063U (en) | Over-voltage dual protector | |
| CN210327000U (en) | Leakage protection switch with automatic detection and self-reset functions | |
| CN210327003U (en) | Self-resetting fireproof protection switch | |
| CN201364628Y (en) | Anti-theft alarm device for air conditioner | |
| CN204696683U (en) | Direct-current traction power supply contact line residual voltage restraining device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20191119 |