CN108718075A - A kind of earth leakage protective switch on wall - Google Patents
A kind of earth leakage protective switch on wall Download PDFInfo
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- CN108718075A CN108718075A CN201810745521.8A CN201810745521A CN108718075A CN 108718075 A CN108718075 A CN 108718075A CN 201810745521 A CN201810745521 A CN 201810745521A CN 108718075 A CN108718075 A CN 108718075A
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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
- H02H3/08—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 excess current
- H02H3/10—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 excess current additionally responsive to some other abnormal electrical conditions
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- 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
- H02H3/20—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 excess voltage
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- 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
- H02H3/28—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 two spaced portions of a single system, e.g. at opposite ends of one line, at input and output of apparatus
-
- 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
Abstract
The invention discloses a kind of earth leakage protective switch on wall, including power end, varistor, reset key, dropout circuit, anti-electricity wall circuit, overvoltage crowbar, leakage current protection circuit, overcurrent protection circuit and test circuit, the both ends of varistor are connect with firewire and zero curve, the both ends of reset key are connect with varistor, for being switched on or switched off circuit, dropout circuit is used in overvoltage, oversampling circuit, deenergization end when leakage current or ground wire electrification, overvoltage crowbar when the overtension between firewire and zero curve for carrying out overvoltage protection, leakage current protection circuit is for occurring to carry out residual current protection when leakage current, overcurrent protection circuit is passed through by firewire, for carrying out overcurrent protection when current is excessive, test circuit is for testing whether earth leakage protective switch on wall can work normally.Implement the present invention, has the advantages that：The service life for having the function of electic protection, capable of being powered off in human electric shock, save electric energy, electric appliance capable of being extended.
Description
Technical field
The present invention relates to switch on wall field, more particularly to a kind of earth leakage protective switch on wall.
Background technology
Switch on wall is electronic component common in daily life, inseparable with people's lives.But it is existing
Switch on wall is only to provide electric appliance access and disconnection switching is connected to be used, and lacks necessary electic protection, there are security risks.
Traditional switch on wall is exactly a plug-in strip, without overcurrent, overvoltage and residual current protection function, will result in human body appearance in this way
It easily gets an electric shock, once generating leakage current, just will produce unnecessary power consumption, can thus consume electric energy, cause unnecessary wave
Take, electric appliance will be burnt out when overvoltage, reduces the service life of electric appliance.If encounter short circuit, electric leakage, overcurrent, ground wire electrification or
It when person's ground wire disconnects, is easily damaged and loads and personal injury is caused to user, be also easy to cause electrical fire, cause property
Loss.
Invention content
The technical problem to be solved in the present invention is that above-mentioned for the prior art does not have electic protection function, human body to hold
Easily get an electric shock, waste electric energy, the defect for reducing electric appliance service life, provide it is a kind of having the function of electic protection, can be in human electric shock
When power-off, save electric energy, can extend electric appliance service life earth leakage protective switch on wall.
The technical solution adopted by the present invention to solve the technical problems is：A kind of earth leakage protective switch on wall is constructed, including
It is power end, varistor, reset key, dropout circuit, anti-electricity wall circuit, overvoltage crowbar, leakage current protection circuit, excessively electric
Stream protection circuit and test circuit, the power end input AC electricity, the both ends of the varistor respectively with the alternating current
Firewire connected with zero curve, the both ends of the reset key are connect respectively with the both ends of the varistor, for being switched on or switched off
Circuit, the dropout circuit and resets key connection are used for overvoltage, oversampling circuit, leakage current or the ground wire electrification the case where
Lower to disconnect the power end, the anti-electricity wall circuit is keyed with the dropout circuit and reset respectively, the overvoltage protection electricity
Road connect with the dropout circuit and anti-electricity wall circuit respectively, for when the overtension between the firewire and zero curve into
Row overvoltage protection, the leakage current protection circuit connect with the dropout circuit and are passed through by the firewire and zero curve, for sending out
Residual current protection is carried out when raw leakage current, the overcurrent protection circuit is electric with the dropout circuit and residual current protection respectively
Road connects, and is passed through by the firewire, for carrying out overcurrent protection when current is excessive, one end of the test circuit with
The zero curve connection, the other end is connect with the leakage current protection circuit, for whether testing the earth leakage protective switch on wall
It can normal work.
In earth leakage protective switch on wall of the present invention, the dropout circuit include tripping coil, it is silicon-controlled, first
Filter capacitor, the 6th resistance and earth leakage protective control chip, and one end of the tripping coil is connect with the firewire, for working as
Occur that the reset key is driven to disconnect when leakage current, carry out residual current protection, the other end of the tripping coil with it is described controllable
The anode of silicon connects, and the silicon-controlled anode also controls the 5th of chip by the 6th resistance and the earth leakage protective
Pin connects, and the silicon-controlled control pole controls chip with one end of first filter capacitor and earth leakage protective respectively
7th pin connect, the silicon-controlled cathode respectively with the zero curve, the other end of the first filter capacitor and earth leakage protective control
6th pin of coremaking piece connects.
In earth leakage protective switch on wall of the present invention, the anti-electricity wall circuit includes second resistance, stirs out
Pass, 3rd resistor, the 4th resistance and third diode, one end of the second resistance are connect with the firewire, second electricity
The other end of resistance is grounded by the toggle switch, one end of the 3rd resistor, one end of the 4th resistance and third diode
Anode connection, the other end ground connection of the 3rd resistor, the other end of the 4th resistance connect with the zero curve.
In earth leakage protective switch on wall of the present invention, the overvoltage crowbar includes the first diode, the 5th
Resistance, the 8th diode, the 7th resistance, the second light emitting diode, the second capacitance and the 4th diode, first diode
Anode connect with the firewire, the cathode of first diode by the 5th resistance respectively with the 7th resistance
One end connected with the anode of the 8th diode, the other end of the 7th resistance passes through second light emitting diode and institute
Zero curve connection is stated, the cathode of the 8th diode is connect by second capacitance with the zero curve, the 8th diode
Cathode also control the 8th pin of chip by the 4th diode and earth leakage protective and connect, the 8th diode
Cathode is also connect with the cathode of the third diode.
In earth leakage protective switch on wall of the present invention, the leakage current protection circuit includes zero sequence current mutual inductance
Device, the tenth resistance, the 5th capacitance, eleventh resistor, the 7th electrolytic capacitor, the 6th capacitance, the 8th resistance, the 9th resistance, third
Capacitance and the 4th capacitance, the firewire and zero curve both pass through the zero sequence current mutual inductor, the tenth resistance and the 5th capacitance
One end in parallel is connect with one end of the coil of the zero sequence current mutual inductor, and the other end in parallel and the zero-sequence current are mutual
The other end of the coil of sensor connects, one end of the coil of the zero sequence current mutual inductor also respectively with the 6th capacitance
One end connection of one end, the third pin of earth leakage protective control chip and the 4th capacitance, the coil of the zero sequence current mutual inductor
The other end pass sequentially through the eleventh resistor and the 7th the capacitance other end and earth leakage protective with the 6th capacitance respectively
The second pin connection of chip is controlled, one end of the third capacitance and the 8th pin of earth leakage protective control chip connect
It connects, the first pin of the earth leakage protective control chip is connect by the 8th resistance with one end of the 9th resistance, institute
State the other end of third capacitance, the other end of the 9th resistance, the other end of the 4th capacitance and earth leakage protective control chip the 4th
Pin is connect with the zero curve.
In earth leakage protective switch on wall of the present invention, the overcurrent protection circuit includes current transformer,
15 resistance, the 16th resistance, the tenth electrolytic capacitor, the 6th diode, the 7th diode, the 8th electrolytic capacitor, the 9th electrolysis
Capacitance, twelfth resistor, thirteenth resistor, the 14th resistance, the 5th diode and triode, the firewire pass through the electricity
Current transformer, is incuded the electric current of the firewire by the current transformer, the 15th resistance and the 16th resistor coupled in parallel
One end is connect with one end of the coil of the current transformer, and the other end in parallel is another with the coil of the current transformer
One end connects, one end of the coil of the current transformer also by the tenth electrolytic capacitor respectively with the six or two pole
The cathode of the anode of pipe and the 7th diode connects, one end of the 5th diode and the 14th resistor coupled in parallel respectively with institute
State the 6th diode cathode and the 9th electrolytic capacitor anode connection, the other end in parallel respectively with the thirteenth resistor
One end and the 8th electrolytic capacitor anode connection, the base stage of the triode other end with the thirteenth resistor respectively
It is connected with one end of twelfth resistor, the collector of the triode is connect with the leakage current protection circuit, the triode
Emitter, the other end of twelfth resistor, the cathode of the 8th capacitance, the cathode of the 9th capacitance, the 7th capacitance anode and electricity
The other end of the coil of current transformer is connect with the zero curve.
In earth leakage protective switch on wall of the present invention, the test circuit includes first resistor and feeler switch, institute
The one end for stating first resistor is connect with the zero curve, and the other end of the first resistor is connect with one end of the feeler switch, institute
The other end for stating feeler switch is connect after the zero sequence current mutual inductor with the firewire by conducting wire.
In earth leakage protective switch on wall of the present invention, the reset key is double-pole switch.
The earth leakage protective switch on wall for implementing the present invention, has the advantages that：Due to being provided with varistor, answering
Position key, dropout circuit, anti-electricity wall circuit, overvoltage crowbar, leakage current protection circuit, overcurrent protection circuit and test electricity
Road, varistor when overtension for shielding, and for being switched on or switched off circuit, dropout circuit is used for reset key
Deenergization end in the case of overvoltage, oversampling circuit, leakage current or ground wire electrification, overvoltage crowbar be used for when firewire and
Overvoltage protection is carried out when overtension between zero curve, and leakage current guarantor is carried out when leakage current protection circuit is for occurring leakage current
Shield, overcurrent protection circuit for carrying out overcurrent protection when current is excessive, and test circuit is for testing earth leakage protective wall
Whether switch can work normally, so it has the function of electic protection, can be powered off in human electric shock, save electric energy, can extend
The service life of electric appliance.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will to embodiment or
Attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
Some embodiments of the present invention, for those of ordinary skill in the art, without having to pay creative labor,
Other drawings may also be obtained based on these drawings.
Fig. 1 is the circuit diagram in earth leakage protective switch on wall one embodiment of the present invention.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
His embodiment, shall fall within the protection scope of the present invention.
In earth leakage protective switch on wall embodiment of the present invention, circuit diagram such as Fig. 1 of the earth leakage protective switch on wall
It is shown.In Fig. 1, tripping coil TK, controllable silicon SCR, the first filter capacitor C1, the 6th resistance R6 and earth leakage protective control chip
IC constitutes dropout circuit, and second resistance R2, toggle switch S, 3rd resistor R3, the 4th resistance R4 and third diode D3 are constituted
Anti-electricity wall circuit, the first diode D1, the 5th resistance R5, the 8th diode D8, the 7th resistance R7, the second light emitting diode D2,
Second capacitance C2 and the 4th diode D2 constitutes overvoltage crowbar, zero sequence current mutual inductor ZCT1, the tenth resistance R10, the
Five capacitance C5, eleventh resistor R11, the 7th electrolytic capacitor C7, the 6th capacitance C6, the 8th resistance R8, the 9th resistance R9, third
Capacitance C3 and the 4th capacitance C4 constitute leakage current protection circuit, current transformer ZCT2, the 15th resistance R15, the 16th resistance
R16, the tenth electrolytic capacitor C10, the 6th diode D6, the 7th diode D7, the 8th electrolytic capacitor C8, the 9th electrolytic capacitor C9,
Twelfth resistor R12, thirteenth resistor R13, the 14th resistance R14, the 5th diode D15 and triode V1 constitute overcurrent
Circuit, first resistor R1 and feeler switch AJ is protected to constitute test circuit.
In the present embodiment, earth leakage protective switch on wall include power end, varistor MOV, reset key S1, dropout circuit,
Anti-electricity wall circuit, overvoltage crowbar, leakage current protection circuit, overcurrent protection circuit and test circuit, wherein power end
Input 220V alternating currents, the both ends of rated voltage 230V, varistor MOV respectively with the firewire L of alternating current and zero curve N
Connection, varistor MOV when overtension for shielding, and the both ends of reset key S1 are respectively with varistor MOV's
Both ends connect, for being switched on or switched off circuit, and dropout circuit is connect with reset key S1, in overvoltage, oversampling circuit, electric leakage
Deenergization end in the case of stream or ground wire electrification, anti-electricity wall circuit are connect with dropout circuit and reset key S1 respectively, overvoltage
Protection circuit connect with dropout circuit and anti-electricity wall circuit respectively, for when the overtension between firewire L and zero curve N into
Row overvoltage protection, such as：When the voltage between firewire L and zero curve N is more than 270V, overvoltage crowbar opens overvoltage protection
Function.
In the present embodiment, leakage current protection circuit connect with dropout circuit and is passed through by firewire L and zero curve N, for when hair
Residual current protection is carried out when raw leakage current, overcurrent protection circuit is connect with dropout circuit and leakage current protection circuit respectively, and
It is passed through by firewire L, for carrying out overcurrent protection when current is excessive, that is, when electric current is more than the maximum value of setting, is opened
Open current protecting function.One end of test circuit is connect with zero curve N, and the other end is connect with leakage current protection circuit, for testing
Whether earth leakage protective switch on wall can work normally.
In the present embodiment, due to being provided with varistor MOV, reset key S1, dropout circuit, anti-electricity wall circuit, overvoltage guarantor
Protection circuit, leakage current protection circuit, overcurrent protection circuit and test circuit, from varistor MOV is used for when overtension
Protective effect, reset key S1 are used for for being switched on or switched off circuit, dropout circuit in overvoltage, oversampling circuit, leakage current or ground wire
Deenergization end in the case of electrification, overvoltage crowbar when the overtension between firewire L and zero curve N for carrying out
Pressure protection, leakage current protection circuit is for occurring to carry out residual current protection when leakage current, and overcurrent protection circuit is for working as electric current
Overcurrent protection is carried out when excessive, test circuit is for testing whether earth leakage protective switch on wall can work normally, so it has
The service life for having electic protection function, capable of being powered off in human electric shock, save electric energy, electric appliance capable of being extended.
In the present embodiment, for dropout circuit, one end of tripping coil TK is connect with firewire L, is leaked for working as
Driving reset key S1 is disconnected when electric current, progress residual current protection, and in the present embodiment, reset key S1 is double-pole switch.Tripping coil
The other end of TK and the anode of controllable silicon SCR connect, and the anode of controllable silicon SCR also passes through the 6th resistance R6 and earth leakage protective control
5th pin of chip IC processed connects, the control pole of controllable silicon SCR respectively with one end of the first filter capacitor C1 and earth leakage protective
Control the 7th pin connection of chip IC, the cathode of controllable silicon SCR respectively with zero curve N, the first filter capacitor C1 the other end and
Earth leakage protective controls the 6th pin connection of chip IC.It is noted that in the present embodiment, the first filter capacitor C1 is used for
Filtering, it is anti-interference.It is two line control circuit of earth leakage of low-power consumption that earth leakage protective, which controls chip IC, is leaked for instant break-make
The application-specific integrated circuit of non-electricity protector incudes two-wire (firewire L and zero curve N) electric leakage signal by zero sequence current sensor ZCT1, leads to
Too short delay exports a high level, to drive controllable silicon SCR to start earth leakage protective.6th resistance R6 is earth leakage protective control
The power input of chip IC processed.
In the present embodiment, for anti-electricity wall circuit, one end of second resistance R2 is connect with firewire L, second resistance R2
The other end be grounded by toggle switch S, one end of 3rd resistor R3, one end of the 4th resistance R4 and third diode D3
Anode connects, and the other end ground connection of 3rd resistor R3, the other end of the 4th resistance R4 is connect with zero curve N.
In the present embodiment, for overvoltage crowbar, the anode of the first diode D1 is connect with firewire L, and the one or two
The cathode of pole pipe D1 is connect with the anode of one end of the 7th resistance R7 and the 8th diode D8 respectively by the 5th resistance R5, the
The other end of seven resistance R7 is connect by the second light emitting diode D2 with zero curve N, and the cathode of the 8th diode D8 passes through the second electricity
Hold C2 connect with zero curve N, the cathode of the 8th diode D8 also passes through the of the 4th diode D4 and earth leakage protective control chip C
Eight pins connect, and the cathode of the 8th diode D8 is also connect with the cathode of third diode D2.In the present embodiment, as firewire L and
When voltage between zero curve N is higher than the maximum voltage value of setting, overvoltage crowbar is switched on over-voltage protecting function.Thus
It can prevent from burning out electric appliance (load), extend the service life of electric appliance.
In the present embodiment, for leakage current protection circuit, firewire L and zero curve N both pass through zero sequence current mutual inductor
ZCT1, zero sequence current mutual inductor ZCT1 are used to calculate the tenth resistance R10 of current difference between two articles of main lines (firewire L and zero curve N)
In parallel, the coil of one end and zero sequence current mutual inductor ZCT1 of the tenth resistance R10 and the 5th capacitance C5 parallel connections with the 5th capacitance C5
One end connection, the other end of the tenth resistance R10 and the 5th capacitance C5 parallel connections is another with the coil of zero sequence current mutual inductor ZCT1
One end connects, and one end of the coil of zero sequence current mutual inductor ZCT1 is also controlled with one end of the 6th capacitance C6, earth leakage protective respectively
One end connection of the third pin and the 4th capacitance C4 of chip IC, the other end of the coil of zero sequence current mutual inductor ZCT1 is successively
By eleventh resistor R11 and the 7th capacitance C7 chip IC is controlled with the other end of the 6th capacitance C6 and earth leakage protective respectively
Second pin connects, and one end of third capacitance C3 is connect with the 8th pin of earth leakage protective control chip IC, earth leakage protective control
First pin of chip IC is connect by the 8th resistance R8 with one end of the 9th resistance R9, the other end of third capacitance C3, the 9th
4th pin of the other end of resistance R9, the other end of the 4th capacitance C4 and earth leakage protective control chip IC connects with zero curve N
It connects.When leakage current occurs, leakage current protection circuit is switched on creepage protection function.Unnecessary electric energy is avoided in this way
Waste, save electric energy.
In the present embodiment, for overcurrent protection circuit, firewire L passes through current transformer ZCT2, by Current Mutual Inductance
The electric current of device ZCT2 induction firewires L, one end and current transformer ZCT2 of the 15th resistance R15 and the 16th resistance R16 parallel connections
Coil one end connection, the other end in parallel connect with the other end of the coil of current transformer ZCT2, current transformer
One end of the coil of ZCT2 also by the tenth electrolytic capacitor C10 respectively with the anode and the 7th diode D7 of the 6th diode D6
Cathode connection, one end of the 5th diode D5 and the 14th resistance R14 parallel connections respectively with the cathode of the 6th diode D6 and the
Nine electrolytic capacitor C9 anode connection, the other end in parallel respectively with one end of thirteenth resistor R13 and the 8th electrolytic capacitor
The anode connection of C8, the base stage of triode V1 one end with the other end of thirteenth resistor R13 and twelfth resistor R12 respectively
Connection, the collector of triode V1 connect with leakage current protection circuit, the emitter of triode V1, twelfth resistor R12 it is another
One end, the cathode of the 8th capacitance C8, the cathode of the 9th capacitance C9, the 7th capacitance C7 anode and current transformer ZCT2 line
The other end of circle is connect with zero curve N.When electric current is more than defined maximum current value, overcurrent protection circuit opened electricity
Flow defencive function.
In the present embodiment, for test circuit, one end of first resistor R1 is connect with zero curve N, first resistor R1's
The other end is connect with one end of feeler switch AJ, after the other end of feeler switch AJ passes through zero sequence current mutual inductor ZCT2 by conducting wire
It is connect with firewire L.When being tested, give zero sequence current mutual inductor ZCT1 mono- low current particular by first resistor R1,
Then test whether entire circuit can work normally.
In short, in the present embodiment, by be arranged varistor MOV, reset key S1, dropout circuit, anti-electricity wall circuit,
Overvoltage crowbar, leakage current protection circuit, overcurrent protection circuit and test circuit make the earth leakage protective switch on wall have
There are earth leakage protective, overvoltage protection, residual current protection and excess current protective function, that is, the earth leakage protective switch on wall has
Electic protection function can thus increase safety, which has the function of electic protection, can be in human body
The service life powered off when electric shock, save electric energy, electric appliance can be extended.The probability that electrical fire occurs also is reduced simultaneously, reduces wealth
Production loss.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
With within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention god.
Claims (8)
1. a kind of earth leakage protective switch on wall, which is characterized in that including power end, varistor, reset key, dropout circuit, prevent
Electric wall circuit, overvoltage crowbar, leakage current protection circuit, overcurrent protection circuit and test circuit, the power end input
The both ends of alternating current, the varistor are connect with the firewire of the alternating current and zero curve respectively, the both ends point of the reset key
It is not connect with the both ends of the varistor, for being switched on or switched off circuit, the dropout circuit is keyed with resets,
For disconnecting the power end, the anti-electricity wall circuit point in the case of overvoltage, oversampling circuit, leakage current or ground wire electrification
Not with the dropout circuit and reset be keyed, the overvoltage crowbar respectively with the dropout circuit and anti-electricity wall circuit
Connection, for carrying out overvoltage protection, the leakage current protection circuit and institute when the overtension between the firewire and zero curve
State dropout circuit connect and passed through by the firewire and zero curve, for leakage current to occur when carry out residual current protection, it is described excessively electric
Stream protection circuit is connect with the dropout circuit and leakage current protection circuit respectively, and is passed through by the firewire, for working as electric current
Overcurrent protection is carried out when excessive, one end of the test circuit is connect with the zero curve, the other end and the residual current protection
Circuit connects, for testing whether the earth leakage protective switch on wall can work normally.
2. earth leakage protective switch on wall according to claim 1, which is characterized in that the dropout circuit includes trip line
Circle, silicon-controlled, the first filter capacitor, the 6th resistance and earth leakage protective control chip, one end of the tripping coil and the fire
Line connects, for driving the reset key to disconnect when leakage current occurs, progress residual current protection, the tripping coil it is another
One end is connect with the silicon-controlled anode, and the silicon-controlled anode also passes through the 6th resistance and the earth leakage protective
Control chip the 5th pin connection, the silicon-controlled control pole respectively with one end of first filter capacitor and electric leakage
Protection control chip the 7th pin connection, the silicon-controlled cathode respectively with the zero curve, the first filter capacitor it is another
The 6th pin for controlling chip with earth leakage protective is held to connect.
3. earth leakage protective switch on wall according to claim 2, which is characterized in that the anti-electricity wall circuit includes the second electricity
Resistance, toggle switch, 3rd resistor, the 4th resistance and third diode, one end of the second resistance are connect with the firewire,
The other end of the second resistance is grounded by the toggle switch, one end of the 3rd resistor, the 4th resistance one end and
The anode of third diode connects, the other end ground connection of the 3rd resistor, the other end and the zero curve of the 4th resistance
Connection.
4. earth leakage protective switch on wall according to claim 3, which is characterized in that the overvoltage crowbar includes first
Diode, the 5th resistance, the 8th diode, the 7th resistance, the second light emitting diode, the second capacitance and the 4th diode, it is described
The anode of first diode is connect with the firewire, the cathode of first diode by the 5th resistance respectively with institute
The one end for stating the 7th resistance is connected with the anode of the 8th diode, and the other end of the 7th resistance shines by described second
Diode is connect with the zero curve, and the cathode of the 8th diode is connect by second capacitance with the zero curve, described
The 8th pin that the cathode of 8th diode also controls chip by the 4th diode and earth leakage protective is connect, and described the
The cathode of eight diodes is also connect with the cathode of the third diode.
5. the earth leakage protective switch on wall according to claim 2 to 4 any one, which is characterized in that the leakage current is protected
Protection circuit include zero sequence current mutual inductor, the tenth resistance, the 5th capacitance, eleventh resistor, the 7th electrolytic capacitor, the 6th capacitance,
8th resistance, the 9th resistance, third capacitance and the 4th capacitance, the firewire and zero curve both pass through the zero sequence current mutual inductor,
One end of tenth resistance and the 5th capacitance parallel connection is connect with one end of the coil of the zero sequence current mutual inductor, in parallel
The other end is connect with the other end of the coil of the zero sequence current mutual inductor, one end of the coil of the zero sequence current mutual inductor
One end of the third pin and the 4th capacitance that also control chip with one end of the 6th capacitance, earth leakage protective respectively is connect, institute
The other end for stating the coil of zero sequence current mutual inductor passes sequentially through the eleventh resistor and the 7th capacitance respectively with described
The second pin that the other end of six capacitances controls chip with earth leakage protective connects, one end and the electric leakage of the third capacitance
The 8th pin connection of protection control chip, the first pin of earth leakage protective control chip by the 8th resistance with
One end of 9th resistance connects, the other end of the third capacitance, the other end of the 9th resistance, the 4th capacitance it is another
4th pin of end and earth leakage protective control chip is connect with the zero curve.
6. earth leakage protective switch on wall according to claim 5, which is characterized in that the overcurrent protection circuit includes
Current transformer, the 15th resistance, the 16th resistance, the tenth electrolytic capacitor, the 6th diode, the 7th diode, the 8th electrolysis
Capacitance, the 9th electrolytic capacitor, twelfth resistor, thirteenth resistor, the 14th resistance, the 5th diode and triode, the fire
Line passes through the current transformer, and the electric current of the firewire, the 15th resistance and the tenth are incuded by the current transformer
One end of six resistor coupled in parallel is connect with one end of the coil of the current transformer, the other end in parallel and the Current Mutual Inductance
The other end of the coil of device connects, one end of the coil of the current transformer also by the tenth electrolytic capacitor respectively with
The cathode connection of the anode and the 7th diode of 6th diode, the 5th diode and the 14th resistor coupled in parallel
One end is connect with the anode of the cathode of the 6th diode and the 9th electrolytic capacitor respectively, the other end in parallel respectively with institute
State one end of thirteenth resistor and the anode connection of the 8th electrolytic capacitor, the base stage of the triode is respectively with the described 13rd
The other end of resistance is connected with one end of twelfth resistor, and the collector of the triode connects with the leakage current protection circuit
It connects, the emitter of the triode, the other end of twelfth resistor, the cathode of the 8th capacitance, the cathode of the 9th capacitance, the 7th
The other end of the anode of capacitance and the coil of current transformer is connect with the zero curve.
7. earth leakage protective switch on wall according to claim 6, which is characterized in that the test circuit includes first resistor
And feeler switch, one end of the first resistor are connect with the zero curve, the other end of the first resistor and the feeler switch
One end connects, and the other end of the feeler switch is connect after the zero sequence current mutual inductor with the firewire by conducting wire.
8. earth leakage protective switch on wall according to claim 1, which is characterized in that the reset key is double-pole switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810745521.8A CN108718075A (en) | 2018-07-09 | 2018-07-09 | A kind of earth leakage protective switch on wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810745521.8A CN108718075A (en) | 2018-07-09 | 2018-07-09 | A kind of earth leakage protective switch on wall |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108718075A true CN108718075A (en) | 2018-10-30 |
Family
ID=63913994
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810745521.8A Withdrawn CN108718075A (en) | 2018-07-09 | 2018-07-09 | A kind of earth leakage protective switch on wall |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108718075A (en) |
-
2018
- 2018-07-09 CN CN201810745521.8A patent/CN108718075A/en not_active Withdrawn
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Application publication date: 20181030 |
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