CN207967912U - Band voluntarily diagnoses the residual current action breaker circuit of detection function - Google Patents
Band voluntarily diagnoses the residual current action breaker circuit of detection function Download PDFInfo
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- CN207967912U CN207967912U CN201820064621.XU CN201820064621U CN207967912U CN 207967912 U CN207967912 U CN 207967912U CN 201820064621 U CN201820064621 U CN 201820064621U CN 207967912 U CN207967912 U CN 207967912U
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Abstract
A kind of band voluntarily diagnoses the residual current action breaker circuit of detection function, including power circuit, electric leakage signal acquisition control circuit and trip circuit；The input terminal of the power circuit is connect with external power supply for taking electricity, the output end of power circuit is connect with trip circuit and electric leakage signal acquisition control circuit, working power is provided for it, further include zero sequence transformer TA, the input terminal of electric leakage signal acquisition control circuit is connect with the both ends of the secondary circuit lead of zero sequence transformer TA, and the output end of electric leakage signal acquisition control circuit and the input terminal of trip circuit connect；It further include the voluntarily diagnosis control circuit for carrying out detection of electrical leakage, voluntarily the input terminal of diagnosis control circuit is connect with external power supply for taking electricity, voluntarily the output end of diagnosis control circuit is connect with the input terminal of electric leakage signal acquisition control circuit, in the negative half-cycle of power supply, voluntarily diagnosis control breadboardin electric leakage signal sends out simulation electric leakage signal to electric leakage signal acquisition control circuit and carries out detection of electrical leakage.
Description
Technical field
The utility model is related to Low Voltage Electrical Apparatus, more particularly to the residual current that a kind of band voluntarily diagnoses detection function is dynamic
Make breaker circuit.
Background technology
Currently, residual current action breaker, the current detection means of client is monthly to press test button on product, simulation
Whether one electric leakage signal is tripped as basis for estimation with protective breaker, to judge that product whether there is failure phenomenon.
Manual operations is cumbersome, misoperation and has Danger Electric shock risk.
Utility model content
The purpose of the utility model is to overcome the defects of the prior art, provide a kind of simple and compact for structure, performance safety
Stablize, detects the residual current action breaker circuit that accurately and reliably band voluntarily diagnoses detection function.
To achieve the above object, the utility model uses following technical solution：
A kind of band voluntarily diagnoses the residual current action breaker circuit of detection function, including power circuit, electric leakage signal
Acquisition control circuit and trip circuit；The input terminal of the power circuit is connect with external power supply for taking electricity, power circuit
Output end is connect with trip circuit and electric leakage signal acquisition control circuit, and working power is provided for it, further includes zero sequence transformer
TA, the input terminal of electric leakage signal acquisition control circuit are connect with the both ends of the secondary circuit lead of zero sequence transformer TA, electric leakage letter
The output end of number acquisition control circuit and the input terminal of trip circuit connect；It further include the voluntarily diagnosis control for carrying out detection of electrical leakage
Circuit, voluntarily the input terminal of diagnosis control circuit connect with external power supply for taking electricity, the voluntarily output end of diagnosis control circuit
It is connect with the input terminal of electric leakage signal acquisition control circuit, in the negative half-cycle of power supply, voluntarily diagnosis control breadboardin electric leakage
Signal sends out simulation electric leakage signal to electric leakage signal acquisition control circuit and carries out detection of electrical leakage.
Further, the voluntarily diagnosis control circuit includes diagnosing chip U2, triode Q2；The diagnosing chip U2 and three
The base stage of pole pipe Q2 connects, and the collector of triode Q2 is connected with the power supply N of external power supply, diagnosing chip U2 and external power supply
Power supply L be connected, the emitter of triode Q2 ground connection, diagnosing chip U2 is connect with trip circuit；Breaker closing after the power is turned on,
Diagnosing chip U2 detects that close at the end of positive half period, period measuring process, diagnosing chip are generated in phase negative half period for phase
U2 controls triode Q2 conductings, and electric leakage signal acquisition control circuit detects that electric leakage signal, diagnosing chip U2 pass through trip circuit
Whether conducting, which carrys out decision circuitry, whether there is failure.
Further, the voluntarily diagnosis control circuit further includes diode VD7, resistance R18, resistance R24, capacitance C6, electricity
Hinder R17, capacitance C5, resistance R22 and diode VD6；The anode of diode VD7 is connected with the power supply N of external power supply, diode
The cathode of VD7 is connect by resistance R24 with the collector of triode Q2, the emitter ground connection of triode Q2, the base of triode Q2
Pole is connect by resistance R17 with the 6th pin of diagnosing chip U2, and capacitance C6 is connected in base stage and three poles of triode Q2 in parallel
Between the emitter of pipe Q2, one end of resistance R18 is connected with the power supply L of external power supply, and the of the other end and diagnosing chip U2
Four pins connect, and capacitance C5 is connected in parallel between the second pin of diagnosing chip U2 and the third pin of diagnosing chip U2, examines
The second pin ground connection of disconnected chip U2, the third pin of diagnosing chip U2 are connect with reduction voltage circuit, resistance R22 and diode VD6
One end after parallel connection is connect with the first pin of diagnosing chip U2, and the other end is connect with trip circuit.
Further, further include automatic power-off circuit and/or warning circuit.
Further, further include automatic power-off circuit, automatic power-off circuit includes resistance R25, silicon-controlled Q4 and capacitance C12；
One end of resistance R25 is connect with voluntarily diagnosis control circuit, and the other end of resistance R25 is connect with the control pole of silicon-controlled Q4, electricity
The one end for holding C12 is connect with the control pole of silicon-controlled Q4, other end ground connection, the minus earth of silicon-controlled Q4, the sun of silicon-controlled Q4
The tripping coil KA connections of pole and trip circuit.
Further, further include warning circuit, warning circuit is in fault alarm；The warning circuit includes luminous two
One end after pole pipe D9 and resistance R16, light emitting diode D9 and resistance R16 connect is connect with voluntarily diagnosis control circuit, another
End ground connection.
Further, further include warning circuit, warning circuit is in fault alarm；The warning circuit includes resistance
R26, loud speaker LS, capacitance C12, resistance R27, resistance R28, resistance R29 and resistance R30；One end of resistance R26 with voluntarily diagnose
Control circuit connects, and the other end of resistance R26 is connect with the base stage of triode Q4, and emitter and the loud speaker LS of triode Q4 connect
It connects, one end of capacitance C12 is connect with the collector of triode Q4, other end ground connection；One after resistance R27 is in parallel with resistance R28
End and resistance R29 are connect with one end after resistance R30 parallel connections, the other end after resistance R27 is in parallel with resistance R28 and triode Q4
Collector connection, resistance R29 connect with the tripping coil KA of the other end and trip circuit after resistance R30 parallel connections.
Further, the external power supply is two-phase power supply, including power supply L phases and power supply N phases, and the power circuit includes wave
Gush absorbing circuit, reduction voltage circuit and rectification circuit；The input terminal of surge absorbing circuit connect with external power supply to input power into
Row surge absoption is protected, and the input terminal of the output end of surge absorbing circuit and rectification circuit connects, the output end of rectification circuit with
The input terminal of reduction voltage circuit is connected with the input terminal of trip circuit, output end and the electric leakage signal acquisition control circuit of reduction voltage circuit
Input terminal connected with the input terminal of voluntarily diagnosis control circuit.
Further, the surge absorbing circuit includes varistor RV1 and varistor RV2, varistor RV1 and pressure-sensitive
Resistance RV2 is connected in parallel respectively between power supply L phases and power supply N phases；The rectification circuit is full-wave rectification bridge, the rectifier bridge
Including diode VD2, diode VD3, diode VD4 and diode VD5, two anisotropic input terminals of rectifier bridge respectively with power supply
L phases are connected with power supply N, the same sex output head anode ground connection of rectifier bridge, the same sex negative pole of output end and reduction voltage circuit of rectifier bridge
Input terminal connected with the input terminal of trip circuit.
Further, the reduction voltage circuit include the first reduction voltage circuit that electric leakage signal acquisition control circuit is depressured and
The second reduction voltage circuit that voluntarily diagnosis control circuit is depressured；First reduction voltage circuit includes resistance R1, resistance R2, electricity
Hinder R3, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8 and resistance R9, resistance R1 and resistance R2, resistance R3 and resistance
R4, resistance R5 and resistance R6 are connected in parallel after being connected in series with respectively, and the output end of one end and rectification circuit after parallel connection connects,
The other end after parallel connection is connect with one end after resistance R7, resistance R8, resistance R9 parallel connections, and resistance R7, resistance R8, resistance R9 are in parallel
The other end afterwards is connect with the input terminal of electric leakage signal acquisition control circuit；Second reduction voltage circuit includes resistance R10, resistance
R11, resistance R12, resistance R13, resistance R14 and resistance R15, resistance R10, resistance R11, resistance R12 and resistance R13, resistance
R14, resistance R15 are connected in parallel after connecting respectively, it is in parallel after one end and the output end of rectification circuit connect, the other end with voluntarily
The input terminal of diagnosis control circuit connects.
Further, the trip circuit includes tripping coil KA, diode VD1 and silicon-controlled Q3；The one of tripping coil KA
End is connected with the power supply L of external power supply, and the other end of tripping coil KA is connect with the anode of diode VD1, diode VD1's
Cathode is connect with the anode of silicon-controlled Q3, the minus earth of silicon-controlled Q3, and control pole and the electric leakage signal acquisition of silicon-controlled Q3 are controlled
The intermediate node of circuit connection processed, diode VD1 and silicon-controlled Q3 are connect with voluntarily diagnosis control circuit.
Further, the electric leakage signal acquisition control circuit includes control chip U1, bilateral diode Q1, debugging resistance
R21, resistance R19, resistance R20 and capacitance C1, capacitance C2, capacitance C3, capacitance C4 and capacitance C7；The power supply L of the external power supply
Phase, power supply N phases both pass through zero sequence transformer TA, and debugging resistance R21, bilateral diode Q1 are connected in parallel on zero sequence transformer TA's successively
The both ends of secondary circuit lead；The both ends bilateral diode Q1 are connect with capacitance C10, capacitance C11 respectively, capacitance C10, capacitance C11
Other end ground connection, resistance R19, the one end resistance R20 connect with capacitance C10, capacitance C11 respectively, the other end respectively with control core
The second pin of piece U1 connect with the third pin of control chip U1, the second pin of control chip U1 and controls the of chip U1
The 8th pin of shunt capacitance C4 between three-prong, control chip U1 are connect with reduction voltage circuit, one end and the control core of capacitance C7
The 8th pin of piece U1 connects, other end ground connection, and capacitance C2 is connected in the 4th pin and control chip of control chip U1 in parallel
Between the 5th pin of U1, capacitance C1 be connected in parallel control chip U1 the 4th pin and control chip U1 the 6th pin it
Between, capacitance C3 is connected in parallel between the 4th pin of control chip U1 and the 7th pin of control chip U1, controls chip U1
The 4th pin connect with trip circuit.
Further, further include leakage tests circuit, the leakage tests circuit includes normally opened test switch S2 and experiment electricity
R23 is hindered, normally opened test switch S2 and test resistance R23 is connected in series between the power supply L phases of external power supply and power supply N phases.
The utility model band voluntarily diagnoses the residual current action breaker circuit of detection function, including power circuit, leakage
Electrical signal collection control circuit and trip circuit further include the voluntarily diagnosis control electricity being detected to dropout circuit of entirely leaking electricity
Road, voluntarily the input terminal of diagnosis control circuit is connect with external power supply threads off back for taking electricity that can not power off online to entirely leaking electricity
Road is detected, and voluntarily diagnosis control circuit is entire to examine by sending out simulation electric leakage signal to electric leakage signal acquisition control circuit
Survey process can all be carried out in the negative half-cycle of power supply, when any element in entirely electric leakage dropout circuit is damaged, all can
It causes trip circuit not work, and then detects fault.Automatic power-off circuit is arranged in the utility model, there is event in circuit
When barrier, controlled silicon conducting is triggered, tripping coil is caused to be threaded off, power themselves down trips after voluntarily detecting failure, ensures electricity consumption peace
Entirely.Voluntarily diagnosis control circuit is connect with warning circuit, in circuit there are when failure, is alarmed by warning circuit, the present embodiment
Middle shone using Light-Emitting Diode indicates or flickers alarm, and certain warning circuit can also use buzzer etc. to carry out alarm and carry
Show.Two-way reduction voltage circuit to electric leakage signal acquisition control circuit and voluntarily diagnosis control circuit respectively is respectively adopted in the utility model
It is depressured, ensures the Electrical Safety of chip.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model residual current action breaker circuit；
Fig. 2 is the circuit diagram of one embodiment of the utility model residual current action breaker circuit；
Fig. 3 is the circuit diagram of another embodiment of the utility model residual current action breaker circuit；
Fig. 4 is the circuit diagram of another embodiment of the utility model residual current action breaker circuit；
Fig. 5 is the circuit diagram of another embodiment of the utility model residual current action breaker circuit.
Specific implementation mode
Below in conjunction with the embodiment that attached drawing 1 to 5 provides, further illustrate that the band of the utility model voluntarily diagnoses detection function
Residual current action breaker circuit specific implementation mode.The band of the utility model voluntarily diagnoses the residue electricity of detection function
Flowing is not limited to the following description as breaker circuit.
As shown in Figs. 1-5, the utility model band voluntarily diagnoses the residual current action breaker circuit of detection function, including
Power circuit, electric leakage signal acquisition control circuit and trip circuit；The input terminal of the power circuit connect use with external power supply
In taking electricity, the output end of power circuit to be connect with trip circuit and electric leakage signal acquisition control circuit, working power is provided for it,
Further include zero sequence transformer TA, the input terminal of electric leakage signal acquisition control circuit and the secondary circuit lead of zero sequence transformer TA
Both ends connect, and the output end of electric leakage signal acquisition control circuit and the input terminal of trip circuit connect, and trip signal is provided for it；
Further include the voluntarily diagnosis control circuit for carrying out detection of electrical leakage, voluntarily the input terminal of diagnosis control circuit is connect with external power supply
For taking electricity, voluntarily the output end of diagnosis control circuit is connect with the input terminal of electric leakage signal acquisition control circuit, is voluntarily diagnosed
Control circuit simulates electric leakage signal, and sending out simulation electric leakage signal to electric leakage signal acquisition control circuit carries out detection of electrical leakage.This reality
The residual current action breaker circuit of detection function, including power circuit, electric leakage signal acquisition control are voluntarily diagnosed with novel belt
Circuit and trip circuit processed further include the voluntarily diagnosis control circuit being detected to dropout circuit of entirely leaking electricity, voluntarily diagnose
The input terminal of control circuit is connect with external power supply is detected dropout circuit of entirely leaking electricity for taking electricity that can not power off online,
In the negative half-cycle of power supply, voluntarily diagnosis control circuit is to electric leakage signal acquisition control circuit by sending out simulation electric leakage signal,
Entire detection process can all be carried out in the negative half-cycle of power supply, when any element in entirely electric leakage dropout circuit is damaged
When, can all trip circuit be caused not work, and then detect fault, the utility model voluntarily diagnoses the structure of detection circuit
Simple and compact, performance safety are stablized, and detection is accurate and reliable.
As shown in Fig. 2, the voluntarily diagnosis control circuit includes diagnosing chip U2, triode Q2, diode VD7, resistance
R18, resistance R24, capacitance C6, resistance R17, capacitance C5, resistance R22 and diode VD6；Anode and the external electricity of diode VD7
The power supply N in source is connected, and the cathode of diode VD7 is connect by resistance R24 with the collector of triode Q2, the hair of triode Q2
The base stage of emitter grounding, triode Q2 is connect by resistance R17 with the 6th pin of diagnosing chip U2, and capacitance C6 is connected in parallel
Between the base stage and the emitter of triode Q2 of triode Q2, one end of resistance R18 is connected with the power supply L of external power supply, separately
One end is connect with the 4th pin of diagnosing chip U2, and capacitance C5 is connected in the second pin and diagnosing chip of diagnosing chip U2 in parallel
Between the third pin of U2, the second pin of diagnosing chip U2 is grounded, and the third pin of diagnosing chip U2 is connect with reduction voltage circuit,
One end after resistance R22 and diode VD6 parallel connections is connect with the first pin of diagnosing chip U2, and the other end connects with trip circuit
It connects, the 4th pin of diagnosing chip U2 is connect with warning circuit.The circuit structure of the voluntarily diagnosis control circuit of the utility model
Simply, at low cost.
As shown in figure 3, further including automatic power-off circuit, automatic power-off circuit includes resistance R25, silicon-controlled Q4 and capacitance
C12；One end of resistance R25 is connect with the 5th pin of diagnosing chip U2, the control pole of the other end of resistance R25 and silicon-controlled Q4
Connection, one end of capacitance C12 are connect with the control pole of silicon-controlled Q4, other end ground connection, and the minus earth of silicon-controlled Q4 is silicon-controlled
The tripping coil KA connections of the anode and trip circuit of Q4.Automatic power-off circuit is arranged in the utility model, and in circuit, there are failures
When, silicon-controlled Q4 conductings are triggered, tripping coil KA is caused to thread off, power themselves down trips after voluntarily detecting failure, ensures electricity consumption
Safety.
As shown in Fig. 2, further including warning circuit connection, warning circuit is in trip circuit failure alarm；The alarm electricity
Road includes light emitting diode D9 and resistance R16, one end after light emitting diode D9 and resistance R16 series connection and voluntarily diagnosis control electricity
Road connects, other end ground connection.Voluntarily diagnosis control circuit is connect with warning circuit, in circuit there are when failure, passes through electricity of alarming
Road is alarmed, and being shone using Light-Emitting Diode in the present embodiment is indicated or flicker alarm, and certain warning circuit can also use buzzing
Device etc. carries out alarm.
As shown in figure 4, another embodiment of warning circuit is：Warning circuit includes resistance R26, loud speaker LS, capacitance
C12, resistance R27, resistance R28, resistance R29 and resistance R30；One end of resistance R26 is connect with the 5th pin of diagnosing chip U2,
The other end of resistance R26 is connect with the base stage of triode Q4, and the emitter of triode Q4 is connect with loud speaker LS, capacitance C12's
One end is connect with the collector of triode Q4, other end ground connection；One end and resistance R29 after resistance R27 is in parallel with resistance R28 with
One end connection after resistance R30 parallel connections, resistance R27 are connect with the other end after resistance R28 parallel connections with the collector of triode Q4,
Resistance R29 is connect with the tripping coil KA of the other end and trip circuit after resistance R30 parallel connections.In circuit there are when failure, pass through
After crossing resistance R26 and triode Q4, conducting causes loud speaker LS buzzings, and provides acoustic control warning function.
As shown in Fig. 2, the electric leakage signal acquisition control circuit includes control chip U1, bilateral diode Q1, debugging electricity
Hinder R21, resistance R19, resistance R20 and capacitance C1, capacitance C2, capacitance C3, capacitance C4 and capacitance C7；The power supply of the external power supply
L phases, power supply N phases both pass through zero sequence transformer TA, and debugging resistance R21, bilateral diode Q1 are connected in parallel on zero sequence transformer TA successively
Secondary circuit lead both ends；The both ends bilateral diode Q1 are connect with capacitance C10, capacitance C11 respectively, capacitance C10, capacitance
The other end of C11 is grounded, and resistance R19, the one end resistance R20 are connect with capacitance C10, capacitance C11 respectively, the other end respectively with control
The second pin of chip U1 is connected with the third pin of control chip U1, and the second pin of control chip U1 is with control chip U1's
The 8th pin of shunt capacitance C4 between third pin, control chip U1 are connect with reduction voltage circuit, one end of capacitance C7 and control
The 8th pin of chip U1 connects, other end ground connection, and capacitance C2 is connected in the 4th pin and control core of control chip U1 in parallel
Between the 5th pin of piece U1, capacitance C1 is connected in the 6th pin of the 4th pin and control chip U1 of control chip U1 in parallel
Between, capacitance C3 is connected in parallel between the 4th pin of control chip U1 and the 7th pin of control chip U1, controls chip
The 4th pin of U1 is connect with trip circuit.When there is leakage current generation, the signal of zero sequence transformer induction is by debugging resistance
At the components filtering such as R21, bilateral diode Q1, resistance R19, resistance R20, capacitance C4, capacitance C10, capacitance C11, capacitance C7
After reason, it is controlled 1 foot and the acquisition of 2 feet of coremaking piece U1.Through control 5 feet of chip U1,6 feet and 7 feet peripheral capacitance C1, C2,
C3 carries out signal processing and judgement, and silicon-controlled Q3 is triggered if leakage current reaches setting value.
As shown in Fig. 2, the trip circuit includes tripping coil KA, diode VD1 and silicon-controlled Q3；Tripping coil KA's
One end is connected with the power supply L of external power supply, and the other end of tripping coil KA is connect with the anode of diode VD1, diode VD1
Cathode connect with the anode of silicon-controlled Q3, the minus earth of silicon-controlled Q3, the control pole of silicon-controlled Q3 is acquired with electric leakage signal
Control circuit connects, and the intermediate node of diode VD1 and silicon-controlled Q3 are connect with voluntarily diagnosis control circuit.When work, work as leakage
Electric current reaches setting value, and control chip U1 collects signal and exports G pole of the high level to silicon-controlled Q3.Silicon-controlled Q3 conductings
Afterwards, it is formed into a loop with diode VD1 and tripping coil, tripping coil has high current to pass through, to drive breaker to disconnect cut-out
Power supply.
As shown in Figure 1, 2, the external power supply is two-phase power supply, including power supply L phases and power supply N phases, the power circuit
Including surge absorbing circuit, reduction voltage circuit and rectification circuit；The input terminal of surge absorbing circuit is connect with external power supply to input
Power supply carries out surge absoption protection, and the input terminal of the output end of surge absorbing circuit and rectification circuit connects, rectification circuit it is defeated
The input terminal of the input terminal and trip circuit of outlet and reduction voltage circuit connects, and output end and the electric leakage signal acquisition of reduction voltage circuit are controlled
The input terminal of circuit processed is connected with the input terminal of voluntarily diagnosis control circuit.Obviously, more multiphase can also be used in external power supply.Specifically
Ground, the surge absorbing circuit include varistor RV1 and varistor RV2, and varistor RV1 and varistor RV2 distinguish
It is connected in parallel between power supply L phases and power supply N phases.The rectification circuit is full-wave rectification bridge, and the rectifier bridge includes diode
VD2, diode VD3, diode VD4 and diode VD5, two of rectifier bridge anisotropic input terminals respectively with power supply L phases and power supply N
Be connected, the same sex output head anode of rectifier bridge ground connection, the same sex negative pole of output end of rectifier bridge and the input terminal of reduction voltage circuit and
The input terminal of trip circuit connects.Rectification circuit can also use halfwave rectifier.Fig. 5, which is provided, is not provided with the one of varistor RV2
Embodiment.
As shown in Fig. 2, the reduction voltage circuit includes the first decompression electricity being depressured to electric leakage signal acquisition control circuit
Road and the second reduction voltage circuit that voluntarily diagnosis control circuit is depressured；First reduction voltage circuit includes resistance R1, resistance
R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8 and resistance R9, resistance R1 and resistance R2, resistance R3 with
Resistance R4, resistance R5 and resistance R6 are connected in parallel after being connected in series with respectively, the output end of one end and rectification circuit after parallel connection
Connection, the other end after parallel connection are connect with one end after resistance R7, resistance R8, resistance R9 parallel connections, resistance R7, resistance R8, resistance
The other end after R9 parallel connections is connect with the input terminal of electric leakage signal acquisition control circuit；Second reduction voltage circuit includes resistance
R10, resistance R11, resistance R12, resistance R13, resistance R14 and resistance R15, resistance R10, resistance R11, resistance R12 and resistance
R13, resistance R14, resistance R15 are connected in parallel after connecting respectively, and the output end of one end and rectification circuit after parallel connection connects, another
End is connect with the input terminal of voluntarily diagnosis control circuit.Two-way reduction voltage circuit is respectively adopted respectively to electric leakage signal in the utility model
Acquisition control circuit and voluntarily diagnosis control circuit is depressured, ensures the Electrical Safety of chip.
As shown in Fig. 2, further including leakage tests circuit, the leakage tests circuit includes normally opened test switch S2 and experiment
Resistance R23, normally opened test switch S2 and test resistance R23 are connected in series between the power supply L phases of external power supply and power supply N phases.
Illustrate that the utility model voluntarily diagnoses the course of work of detection circuit with reference to Fig. 1,2：
When normal work, silicon-controlled Q3 controls trip coil KA, and when leakage current reaches setting value, coil trip will
It is attracted, load break switch disconnects to ensure personal safety.Breaker closing after the power is turned on, the 4th feet of diagnosing chip U2 detect
Phase will generate the test process of a 10ms, at this point, diagnosing chip U2 close at the end of positive half period in phase negative half period
6 foot control triode Q2 conductings.Control chip U1 will detect electric leakage signal at this time, and be in pulse output state in the 5th foot,
Silicon-controlled Q3 conductings, because firewire L is in close to nought state, so reverse bias at diode VD1, coil KA is not attracted, open circuit
Device is not threaded off；At the same time, the 1st feet of diagnosing chip U2 export high level, after diode VD6, supply electricity to silicon-controlled Q3 sun
Pole, after silicon-controlled Q3 is driven, the 1st foot voltages of diagnosing chip U2 are pulled low, and diagnosing chip U2 internal judgments indicate that this is logical
It crosses, it was demonstrated that silicon-controlled working properly.If not detecting low level, it will be repeated 3 times, being proved if low level is not detected can
Silicon operation irregularity is controlled, the 5 foot output signals driving alarm lamp of diagnosing chip U2 or buzzer are alarmed at this time.
1, this self-detection circuit divides detection of electrical leakage chip (diagnosing chip) and Master control chip (control chip U1) two parts,
Integrated level and homogeneity of product are high, and outer member is less, using simple, good reliability, strong interference immunity.
2, this self-detection circuit scheme can realize AC types detection of electrical leakage and being capable of automated periodic completion self-checking function.
Self-test chip completes automated periodic self-test work(because of built-in chip type timing circuit, by internal digital control logic to call
Energy.
3, this self-detection circuit scheme can realize to electric leakage chip, mutual inductor, the key elements such as silicon-controlled, buckle releaser and
Circuit performance is tested.
4, this self-detection circuit scheme, which can be realized, can complete to phase phase of line and voltage detecting.
5, this self-detection circuit scheme has sampling external AC frequency as clock standard and is internally integrated high-precision simultaneously
Oscillating circuit can provide high-precision timing function for system.
It, cannot the above content is specific preferred embodiment further detailed description of the utility model is combined
Assert that the specific implementation of the utility model is confined to these explanations.For the ordinary skill of the utility model technical field
For personnel, without departing from the concept of the premise utility, a number of simple deductions or replacements can also be made, should all regard
To belong to the scope of protection of the utility model.
Claims (13)
1. a kind of band voluntarily diagnoses the residual current action breaker circuit of detection function, it is characterised in that：Including power circuit,
Electric leakage signal acquisition control circuit and trip circuit；The input terminal of the power circuit is connect with external power supply for taking electricity, electricity
The output end of source circuit is connect with trip circuit and electric leakage signal acquisition control circuit, and working power is provided for it, further includes zero
Sequence mutual inductor TA, the input terminal of electric leakage signal acquisition control circuit and the both ends of the secondary circuit lead of zero sequence transformer TA connect
It connects, the output end of electric leakage signal acquisition control circuit and the input terminal of trip circuit connect；
Further include the voluntarily diagnosis control circuit for carrying out detection of electrical leakage, voluntarily the input terminal of diagnosis control circuit connects with external power supply
It connects for taking electricity, voluntarily the output end of diagnosis control circuit is connect with the input terminal of electric leakage signal acquisition control circuit, in power supply
Negative half-cycle, voluntarily diagnosis control breadboardin electric leakage signal sends out simulation electric leakage letter to electric leakage signal acquisition control circuit
Number carry out detection of electrical leakage.
2. band according to claim 1 voluntarily diagnoses the residual current action breaker circuit of detection function, feature exists
In：The voluntarily diagnosis control circuit includes diagnosing chip U2, triode Q2；The base stage of the diagnosing chip U2 and triode Q2
Connection, the collector of triode Q2 are connected with the power supply N of external power supply, and diagnosing chip U2 is connected with the power supply L of external power supply
It connects, the emitter ground connection of triode Q2, diagnosing chip U2 is connect with trip circuit；Breaker closing after the power is turned on, diagnosing chip U2
Detect that phase close at the end of positive half period, generates period measuring process, diagnosing chip U2 controls three poles in phase negative half period
Pipe Q2 conducting, electric leakage signal acquisition control circuit detect electric leakage signal, diagnosing chip U2 by trip circuit whether be connected come
Decision circuitry whether there is failure.
3. band according to claim 2 voluntarily diagnoses the residual current action breaker circuit of detection function, feature exists
In：The voluntarily diagnosis control circuit further includes diode VD7, resistance R18, resistance R24, capacitance C6, resistance R17, capacitance C5,
Resistance R22 and diode VD6；The anode of diode VD7 is connected with the power supply N of external power supply, and the cathode of diode VD7 passes through
Resistance R24 is connect with the collector of triode Q2, and the emitter ground connection of triode Q2, the base stage of triode Q2 passes through resistance R17
Connect with the 6th pin of diagnosing chip U2, capacitance C6 be connected in parallel triode Q2 base stage and triode Q2 emitter it
Between, one end of resistance R18 is connected with the power supply L of external power supply, and the other end is connect with the 4th pin of diagnosing chip U2, capacitance
C5 is connected in parallel between the second pin of diagnosing chip U2 and the third pin of diagnosing chip U2, the second pipe of diagnosing chip U2
Foot is grounded, and the third pin of diagnosing chip U2 connect with reduction voltage circuit, one end after resistance R22 and diode VD6 parallel connections with examine
The first pin connection of disconnected chip U2, the other end are connect with trip circuit.
4. band according to claim 1 voluntarily diagnoses the residual current action breaker circuit of detection function, feature exists
In：Further include automatic power-off circuit and/or warning circuit.
5. band according to claim 1 voluntarily diagnoses the residual current action breaker circuit of detection function, feature exists
In：Further include automatic power-off circuit, automatic power-off circuit includes resistance R25, silicon-controlled Q4 and capacitance C12；One end of resistance R25
Connect with voluntarily diagnosis control circuit, the other end of resistance R25 is connect with the control pole of silicon-controlled Q4, one end of capacitance C12 with
The control pole of silicon-controlled Q4 connects, other end ground connection, the minus earth of silicon-controlled Q4, the anode of silicon-controlled Q4 and trip circuit
Tripping coil KA connections.
6. band according to claim 1 voluntarily diagnoses the residual current action breaker circuit of detection function, feature exists
In：Further include warning circuit, warning circuit is in fault alarm；The warning circuit includes light emitting diode D9 and resistance
One end after R16, light emitting diode D9 and resistance R16 connect is connect with voluntarily diagnosis control circuit, other end ground connection.
7. band according to claim 1 voluntarily diagnoses the residual current action breaker circuit of detection function, feature exists
In：Further include warning circuit, warning circuit is in fault alarm；The warning circuit includes resistance R26, loud speaker LS,
Capacitance C12, resistance R27, resistance R28, resistance R29 and resistance R30；One end of resistance R26 is connect with voluntarily diagnosis control circuit,
The other end of resistance R26 is connect with the base stage of triode Q4, and the emitter of triode Q4 is connect with loud speaker LS, capacitance C12's
One end is connect with the collector of triode Q4, other end ground connection；One end and resistance R29 after resistance R27 is in parallel with resistance R28 with
One end connection after resistance R30 parallel connections, resistance R27 are connect with the other end after resistance R28 parallel connections with the collector of triode Q4,
Resistance R29 is connect with the tripping coil KA of the other end and trip circuit after resistance R30 parallel connections.
8. band according to claim 1 voluntarily diagnoses the residual current action breaker circuit of detection function, feature exists
In：The external power supply is two-phase power supply, including power supply L phases and power supply N phases, the power circuit include surge absorbing circuit,
Reduction voltage circuit and rectification circuit；The input terminal of surge absorbing circuit is connect with external power supply carries out surge absoption guarantor to input power
The input terminal of shield, the output end of surge absorbing circuit and rectification circuit connects, the output end of rectification circuit and reduction voltage circuit it is defeated
Enter end to connect with the input terminal of trip circuit, the output end of reduction voltage circuit is with the input terminal of electric leakage signal acquisition control circuit and certainly
The input terminal of row diagnosis control circuit connects.
9. band according to claim 8 voluntarily diagnoses the residual current action breaker circuit of detection function, feature exists
In：The surge absorbing circuit includes varistor RV1 and varistor RV2, and varistor RV1 and varistor RV2 distinguish
It is connected in parallel between power supply L phases and power supply N phases；The rectification circuit is full-wave rectification bridge, and the rectifier bridge includes diode
VD2, diode VD3, diode VD4 and diode VD5, two of rectifier bridge anisotropic input terminals respectively with power supply L phases and power supply N
Be connected, the same sex output head anode of rectifier bridge ground connection, the same sex negative pole of output end of rectifier bridge and the input terminal of reduction voltage circuit and
The input terminal of trip circuit connects.
10. band according to claim 8 voluntarily diagnoses the residual current action breaker circuit of detection function, feature exists
In：The reduction voltage circuit includes the first reduction voltage circuit being depressured to electric leakage signal acquisition control circuit and to voluntarily diagnosing control
The second reduction voltage circuit that circuit processed is depressured；First reduction voltage circuit includes resistance R1, resistance R2, resistance R3, resistance R4,
Resistance R5, resistance R6, resistance R7, resistance R8 and resistance R9, resistance R1 and resistance R2, resistance R3 and resistance R4, resistance R5 and electricity
Resistance R6 is connected in parallel after being connected in series with respectively, and the output end of one end and rectification circuit after parallel connection connects, another after parallel connection
End connect with one end after resistance R7, resistance R8, resistance R9 parallel connections, the other end after resistance R7, resistance R8, resistance R9 parallel connections and
The input terminal of electric leakage signal acquisition control circuit connects；Second reduction voltage circuit includes resistance R10, resistance R11, resistance R12,
Resistance R13, resistance R14 and resistance R15, resistance R10, resistance R11, resistance R12 and resistance R13, resistance R14, resistance R15 difference
It is connected in parallel after series connection, the output end of one end and rectification circuit after parallel connection connects, the other end and voluntarily diagnosis control circuit
Input terminal connects.
11. band according to claim 1 voluntarily diagnoses the residual current action breaker circuit of detection function, feature exists
In：The trip circuit includes tripping coil KA, diode VD1 and silicon-controlled Q3；One end of tripping coil KA and external power supply
Power supply L be connected, the other end of tripping coil KA is connect with the anode of diode VD1, the cathode of diode VD1 with it is silicon-controlled
The anode of Q3 connects, and the control pole of the minus earth of silicon-controlled Q3, silicon-controlled Q3 is connect with electric leakage signal acquisition control circuit, and two
The intermediate node of pole pipe VD1 and silicon-controlled Q3 are connect with voluntarily diagnosis control circuit.
12. band according to claim 1 voluntarily diagnoses the residual current action breaker circuit of detection function, feature exists
In：The electric leakage signal acquisition control circuit includes control chip U1, bilateral diode Q1, debugging resistance R21, resistance R19, electricity
Hinder R20 and capacitance C1, capacitance C2, capacitance C3, capacitance C4 and capacitance C7；Power supply L phases, the power supply N phases of the external power supply are worn
Zero sequence transformer TA is crossed, debugging resistance R21, bilateral diode Q1 are connected in parallel on the secondary circuit lead of zero sequence transformer TA successively
Both ends；The both ends bilateral diode Q1 are connect with capacitance C10, capacitance C11 respectively, capacitance C10, capacitance C11 the other end ground connection, electricity
Resistance R19, the one end resistance R20 connects with capacitance C10, capacitance C11 respectively, the other end respectively with the second pin for controlling chip U1 and
Control the third pin connection of chip U1, electricity in parallel between the second pin and the third pin of control chip U1 of control chip U1
Hold C4, the 8th pin of control chip U1 is connect with reduction voltage circuit, and one end of capacitance C7 and the 8th pin of control chip U1 connect
It connecing, other end ground connection, capacitance C2 is connected in parallel between the 4th pin of control chip U1 and the 5th pin of control chip U1,
Capacitance C1 is connected in parallel between the 4th pin of control chip U1 and the 6th pin of control chip U1, and capacitance C3 is connected in parallel
Between the 4th pin and the 7th pin of control chip U1 of control chip U1, the 4th pin and the electricity of threading off of control chip U1
Road connects.
13. band according to claim 1 voluntarily diagnoses the residual current action breaker circuit of detection function, feature exists
In：Further include leakage tests circuit, the leakage tests circuit includes normally opened test switch S2 and test resistance R23, normally opened survey
Runin is closed S2 and test resistance R23 and is connected in series between the power supply L phases of external power supply and power supply N phases.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820064621.XU CN207967912U (en) | 2018-01-15 | 2018-01-15 | Band voluntarily diagnoses the residual current action breaker circuit of detection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820064621.XU CN207967912U (en) | 2018-01-15 | 2018-01-15 | Band voluntarily diagnoses the residual current action breaker circuit of detection function |
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| Publication Number | Publication Date |
|---|---|
| CN207967912U true CN207967912U (en) | 2018-10-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820064621.XU Active CN207967912U (en) | 2018-01-15 | 2018-01-15 | Band voluntarily diagnoses the residual current action breaker circuit of detection function |
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| Country | Link |
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| CN (1) | CN207967912U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108199346A (en) * | 2018-01-15 | 2018-06-22 | 浙江正泰电器股份有限公司 | Band voluntarily diagnoses the residual current action breaker circuit of detection function |
| CN110047691A (en) * | 2019-04-18 | 2019-07-23 | 首钢京唐钢铁联合有限责任公司 | A kind of power disconnecting switch and electrical power wiring isolating device |
| CN117039708A (en) * | 2023-10-07 | 2023-11-10 | 江苏安靠智能输电工程科技股份有限公司 | Novel all-insulated handcart type switch cabinet |
-
2018
- 2018-01-15 CN CN201820064621.XU patent/CN207967912U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108199346A (en) * | 2018-01-15 | 2018-06-22 | 浙江正泰电器股份有限公司 | Band voluntarily diagnoses the residual current action breaker circuit of detection function |
| CN110047691A (en) * | 2019-04-18 | 2019-07-23 | 首钢京唐钢铁联合有限责任公司 | A kind of power disconnecting switch and electrical power wiring isolating device |
| CN117039708A (en) * | 2023-10-07 | 2023-11-10 | 江苏安靠智能输电工程科技股份有限公司 | Novel all-insulated handcart type switch cabinet |
| CN117039708B (en) * | 2023-10-07 | 2024-01-05 | 江苏安靠智能输电工程科技股份有限公司 | Novel all-insulated handcart type switch cabinet |
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