CN107681629A - The full-automatic control circuit of earth leakage of one kind band overcurrent protective and its method - Google Patents
The full-automatic control circuit of earth leakage of one kind band overcurrent protective and its method Download PDFInfo
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- CN107681629A CN107681629A CN201711113754.8A CN201711113754A CN107681629A CN 107681629 A CN107681629 A CN 107681629A CN 201711113754 A CN201711113754 A CN 201711113754A CN 107681629 A CN107681629 A CN 107681629A
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- 230000001681 protective effect Effects 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000001514 detection method Methods 0.000 claims abstract description 82
- 230000005611 electricity Effects 0.000 claims abstract description 37
- 230000001012 protector Effects 0.000 claims abstract description 17
- 230000010354 integration Effects 0.000 claims description 23
- 230000007704 transition Effects 0.000 claims description 19
- 238000006243 chemical reaction Methods 0.000 claims description 11
- 238000002474 experimental method Methods 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 2
- 210000001367 artery Anatomy 0.000 claims 1
- 210000003462 vein Anatomy 0.000 claims 1
- 230000002159 abnormal effect Effects 0.000 abstract description 4
- 230000035772 mutation Effects 0.000 abstract description 3
- 230000006870 function Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010511 deprotection reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000009993 protective function Effects 0.000 description 1
- 230000009885 systemic effect Effects 0.000 description 1
Classifications
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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
- H02H3/08—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
- H02H3/08—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
- H02H3/105—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 responsive to excess current and fault current to earth
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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
- H02H3/32—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 present invention relates to Household electricity leakage protection device product technical field; the especially full-automatic control circuit of earth leakage of one kind band overcurrent protective and its method, including over-current detection coil, regulation resistance R1, divider resistance R2, divider resistance R3, reverse hold-off diode D1 and Full-automatic leaked non-electricity protector unit.Earth leakage protective device load outputs live wire or zero line are installed with over-current detection coil.Over-current detection coil output connection divider resistance R2, divider resistance R3 and reverse hold-off diode D1 extremely electric leakage dropout control module.It is of the invention that security is higher compared with existing voltage-type earth leakage protective device, can automatic identification electricity consumption load abnormal bring fire safety evaluating hidden danger while according to power utilization environment auto-changeover control pattern, solve the potential safety hazard brought after power utilization environment mutation.
Description
Technical field
The present invention relates to Household electricity leakage protection device product technical field, especially a kind of band overcurrent protective automatically leaks electricity
Protector control circuit and its method.
Background technology
Existing earth leakage protective device Control Cooling has voltage-type, current mode and voltage/current interlocking control type.The type
Product advantage is to reach more preferable versatility to adapt to power utilization environment with this by artificially selecting Control Cooling.Shortcoming is when installation
Earth leakage protective device can not tackle in real time when the product later stage power utilization environment of completion is undergone mutation, such as：It is preset in advance to use voltage
Type earth leakage protective device is when meeting power outlet opposite polarity, and when receptacle grounds are with live wire short circuit, voltage-type earth leakage protective device will lose
Deprotection acts on.For this potential safety hazard, the present invention proposes a kind of band overcurrent protective Full-automatic leaked non-electricity protector (when electricity consumption is born
Earth leakage protective device can be automatically cut off during the disaster hidden-trouble that load generation overload or abnormal short circuit band come and intelligence adapts to electrical environment
Control Cooling is switched to voltage-type by dynamic in real time, current mode or voltage/current interlock control type) control mode is above-mentioned to solve
Problem.
The content of the invention
The present invention seeks to overcome deficiency of the prior art, there is provided a kind of band overcurrent protective automatically leaks electricity guarantor
Device control circuit and its method are protected, enhances earth leakage protective device security performance, overcurrent protective fully-automatic intelligent earth leakage protective device
The polymorphic form of ground wire electrification is can determine that while the disaster hidden-trouble that energy solution is brought by load overcurrent, particularly in power outlet
Live wire and uneasy omnicharacteristic caused by earth short, solves the prominent caused potential safety hazard of power utilization environment under extreme condition.
In order to solve the above-mentioned technical problem, the present invention is to be achieved through the following technical solutions：
The full-automatic control circuit of earth leakage of one kind band overcurrent protective and its method, including over-current detection coil, tune
Economize on electricity resistance R1, divider resistance R2, divider resistance R3, reverse hold-off diode D1 and Full-automatic leaked non-electricity protector unit.Electric leakage is protected
Shield device load outputs live wire or zero line are installed with over-current detection coil.Over-current detection coil output connection divider resistance R2, divide
Piezoresistance R3 and reverse hold-off diode D1 extremely electric leakage dropout control modules.When load output current reaches default load current
When, over-current detection coil output voltage will drive electric leakage dropout control module to make earth leakage protective device tripping operation power-off.Over-current detection line
Circle is through on live wire or zero line, and the pin of over-current detection coil output one is connected on output zero line, and another pin concatenates divider resistance
R2 and divider resistance R3 partial pressures, mid-point voltage are connected to electric leakage dropout control module input through reverse hold-off diode D1.Excessively stream
Detection coil both ends and the regulation resistance R1 for being connected to overcurrent protection value.Full-automatic leaked non-electricity protector unit include power supply module,
Tape electro-detection and indicating module, E-N voltage switches logic module, E-N voltage follows module, paraphase control module, integration mould
Block, logic state transition module, switching logic control module, ground line current detection module, zero sequence detection of electrical leakage module, electric leakage are de-
Detain control module, high temperature protection control module and electromagnetic trip coil.The power supply module connect respectively ground wire electrified detection with
Indicating module and E-N voltage switch logic modules.The ground wire electrified detection passes sequentially through E-N voltage switches with indicating module and patrolled
Collect module, E-N voltage follows module, paraphase control module, integration module, logic state transition module, switching logic control mould
Block connects ground line current detection module and electric leakage dropout control module respectively.The zero sequence detection of electrical leakage module, high temperature protection control
Molding block and electromagnetic trip coil are all connected with dropout control module of leaking electricity.The electromagnetic trip coil is also associated with experiment electric leakage drop
Die block.
Preferably, the power supply module is available to the power supply of E-N voltage switch logic modules.The E-N voltage switches
Logic module is to analyze the terminal voltage feature between power input E-N, according to voltage characteristic export three kinds of state of a controls (high level,
Low level, pulse).The E-N voltage follows module is the size (linear scale) between direct proportion output E-N, when receiving
High level is then exported during high level, low level is then exported when receiving low level, pulse is then exported when receiving pulse.Institute
It is that the signal received is carried out into level conversion to state paraphase control module (high level turns low level or low level turns high level).Institute
It is that E-N voltage follows output pulse signal carries out integration and pulse signal is converted into high level or low level to state integration module, is adopted
After can detecting under extreme condition (E-L direct short-circuits) with the logic decision of E-N voltage switches, system automatically switches into current mode
Protection, prevent power input potential safety hazard caused by the anti-phase rear socket ground wire disconnection of zero live wire and with live wire short circuit.The control
The safe mode that system improves earth leakage protective device field again can more adapt to different power utilization environments automatically so as to more effectively real
Existing safety utilization of electric power.
Preferably, size of the E-N voltage switches logic module according to voltage between power utilization environment E-N, intelligence output
Three kinds of logics (high level, low level, pulse), three states.
Preferably, three kinds of logics of the intelligence output are respectively：
E has ground connection：Export low level；
E is no ground, E-N short circuits, E-L short circuits：Export high level；
E is powered：Pulse (dutycycle) is exported during E-N ＞ 18V.
Preferably, the power supply module is attempted by between power supply L-N, and output end is connected with E-N voltage switch logic modules.
E-N voltage follows output pulse signal, which carries out integration, makes pulse signal be converted into high level or low level.
Preferably, the indicating module of the ground wire electrified detection and indicating module (LED) and ground wire electrified detection and finger
Show the connected mode of the detection module of module to connect, indicating module and the ground strip electric-examination of ground wire electrified detection and indicating module
Survey and the detection module of indicating module is attempted by between power input E-N.
Preferably, the size (linear scale) between the E-N voltage follows module direct proportion output E-N, when between E-N
During voltage ＞ 18V, E-N voltage follow modules begin with voltage output, and the voltage between E-N is bigger, and E-N voltage follow modules are defeated
Go out that voltage is higher, maximum output voltage is the supply voltage of E-N voltage follow modules.
Preferably, described logic state transition module receives the low and high level from integration module output, when detection is accumulated
Sub-module then exports low level when exporting high level, otherwise exports high level.
Preferably, the paraphase control module receives the switching signal from the output of E-N voltage follows module, when input is
Then exported during high level as low level, otherwise is high level.Switching logic control module, which receives, carrys out logic state transition module
Switching signal, then exported when input high level as low level (output end presentation short-circuit condition), otherwise (presentation is opened for output cut-off
Line state).
Preferably, the ground line current detection module output end is controlled by the output control of switching logic control module.When
When switching logic control module exports low level, the ground line current detection module output will force shorted to earth, not allow ground
Line current participates in earth leakage protective；When switching logic control module exports high level, the ground line current detection module output will
Participate in ground line current earth leakage protective.
Beneficial effect of the present invention：Of the invention security is higher compared with existing voltage-type earth leakage protective device, can know automatically
According to power utilization environment auto-changeover control pattern while the fire safety evaluating hidden danger that other electricity consumption load abnormal is brought, solves electricity consumption
The potential safety hazard brought after environmental catastrophe.Judge to detect under extreme condition that (E-L is direct using E-N voltage switches logic module
Short circuit) after, system automatically switches into current mode protection, and this kind of control mode can prevent power input after zero live wire is anti-phase
Receptacle grounds disconnect and with live wire short circuit caused by potential safety hazard, the safe mode for improving earth leakage protective device field again more can
Automatically different power utilization environments is adapted to so as to more effectively realize safety utilization of electric power.
Design, concrete structure and the caused technique effect of the present invention are described further below with reference to accompanying drawing, with
It is fully understood from the purpose of the present invention, feature and effect.
Brief description of the drawings
Fig. 1 is the electrical block diagram of the present invention.
Embodiment
Embodiments of the invention are described in detail below in conjunction with accompanying drawing, but the present invention can be defined by the claims
Implement with the multitude of different ways of covering.
It is as shown in figure 1, a kind of with the full-automatic control circuit of earth leakage of overcurrent protective and its method, including excessively stream inspection
Test coil, regulation resistance R1, divider resistance R2, divider resistance R3, reverse hold-off diode D1 and Full-automatic leaked non-electricity protector list
Member.Earth leakage protective device load outputs live wire or zero line are installed with over-current detection coil.Over-current detection coil output connects partial pressure
Resistance R2, divider resistance R3 and reverse hold-off diode D1 extremely electric leakage dropout control modules.When load output current reaches default
During load current, over-current detection coil output voltage will drive electric leakage dropout control module to make earth leakage protective device tripping operation power-off.Cross
Stream detection coil is through on live wire or zero line, and the pin of over-current detection coil output one is connected on output zero line, another pin concatenation
Divider resistance R2 and divider resistance R3 partial pressures, mid-point voltage are connected to electric leakage dropout control module through reverse hold-off diode D1 and inputted
End.Over-current detection coil both ends and the regulation resistance R1 for being connected to overcurrent protection value.Full-automatic leaked non-electricity protector unit includes power supply
Module, ground wire electrified detection and indicating module, E-N voltage switches logic module, E-N voltage follows module, paraphase control module,
Integration module, logic state transition module, switching logic control module, ground line current detection module, zero sequence detection of electrical leakage module,
Leak electricity dropout control module, high temperature protection control module and electromagnetic trip coil.The power supply module connects ground wire electrification respectively
Detection and indicating module and E-N voltage switch logic modules.The ground wire electrified detection passes sequentially through E-N voltages with indicating module
Switch logic, E-N voltage follows module, paraphase control module, integration module, logic state transition module, switching logic
Control module connects ground line current detection module and electric leakage dropout control module respectively.The zero sequence detection of electrical leakage module, high temperature
Protection control module and electromagnetic trip coil are all connected with dropout control module of leaking electricity.The electromagnetic trip coil is also associated with testing
Leak electricity voltage reduction module.
Further, the power supply module is available to the power supply of E-N voltage switch logic modules.The E-N voltages are opened
It is to analyze the terminal voltage feature between power input E-N to close logic module, and three kinds of state of a controls (high electricity is exported according to voltage characteristic
It is flat, low level, pulse).The E-N voltage follows module is the size (linear scale) between direct proportion output E-N, works as reception
High level is then exported during to high level, low level is then exported when receiving low level, pulse is then exported when receiving pulse.
The paraphase control module is that the signal received is carried out into level conversion (high level turns low level or low level turns high level).
The integration module is that E-N voltage follows output pulse signal carries out integration and pulse signal is converted into high level or low level,
After can detecting under extreme condition (E-L direct short-circuits) using the logic decision of E-N voltage switches, system automatically switches into electric current
Type is protected, and prevents power input potential safety hazard caused by the anti-phase rear socket ground wire disconnection of zero live wire and with live wire short circuit.Should
The safe mode that control improves earth leakage protective device field again can more adapt to different power utilization environments automatically so as to more effectively
Realize safety utilization of electric power.
Further, size of the E-N voltage switches logic module according to voltage between power utilization environment E-N, intelligence are defeated
Go out three kinds of logics (high level, low level, pulse), three states.The intelligence exports three kinds of logics：E has ground connection：It is defeated
Go out low level；E is no ground, E-N short circuits, E-L short circuits：Export high level；E is powered：Pulse (dutycycle) is exported during E-N ＞ 18V.
Further, the power supply module is attempted by between power supply L-N, and output end is connected with E-N voltage switch logic moulds
Block.E-N voltage follows output pulse signal, which carries out integration, makes pulse signal be converted into high level or low level.
Further, the indicating module of the ground wire electrified detection and indicating module (LED) and ground wire electrified detection with
The connected mode of the detection module of indicating module is the indicating module and ground wire electrification of series connection, ground wire electrified detection and indicating module
The detection module of detection and indicating module is attempted by between power input E-N.
Further, the size (linear scale) between E-N voltage follows module direct proportion output E-N, when E-N it
Between voltage ＞ 18V when, E-N voltage follow modules begin with voltage output, and the voltage between E-N is bigger, E-N voltage follow modules
Output voltage is higher, and maximum output voltage is the supply voltage of E-N voltage follow modules.
Further, described logic state transition module receives the low and high level from integration module output, works as detection
Integration module then exports low level when exporting high level, otherwise exports high level.
Further, the paraphase control module receives the switching signal from the output of E-N voltage follows module, works as input
It is low level then to be exported during high level, otherwise is high level.Switching logic control module, which receives, carrys out logic state transition module
Switching signal, then exported when input high level as low level (output end presentation short-circuit condition), otherwise output cut-off (is presented
Open-circuit condition).
Further, the ground line current detection module output end is controlled by the output control of switching logic control module.
When switching logic control module exports low level, the ground line current detection module output will force shorted to earth, not allow
Ground line current participates in earth leakage protective；When switching logic control module exports high level, the ground line current detection module output
Ground line current earth leakage protective will be participated in.
Of the invention security is higher compared with existing voltage-type earth leakage protective device, can automatic identification electricity consumption load abnormal
According to power utilization environment auto-changeover control pattern while the fire safety evaluating hidden danger brought, brought after solving power utilization environment mutation
Potential safety hazard.Judged using E-N voltage switches logic module after detecting under extreme condition (E-L direct short-circuits), system is certainly
It is dynamic to switch to current mode protection, this kind of control mode can prevent power input disconnect in the anti-phase rear socket ground wire of zero live wire and
With potential safety hazard caused by live wire short circuit, improve again the safe mode in earth leakage protective device field can more adapt to automatically it is different
Power utilization environment is so as to more effectively realize safety utilization of electric power.
Operation principle：
Overcurrent protection：During loaded work piece, when excessively stream detection coil detects high current (systemic presupposition electric current), excessively stream
After divider resistance R2 and divider resistance R3 partial pressure, mid-point voltage is sent detection coil output voltage through reverse hold-off diode D1
Power-off tripping operation is performed to electric leakage dropout control module, so as to solve power-off purpose.
E-N voltage switch logic modules："on" position, power supply module output voltage supply to E-N voltage switches logic module
Electricity, after obtaining electricity, E-N voltage switches logic module judges and exported corresponding logic according to the voltage difference between current E-N or Δ V
Signal, such as：E has ground connection：Export low level；E is no ground, E-N short circuits, E-L short circuits：Export high level；E is powered：E-N ＞ 18V
When export pulse (dutycycle)；E-N ＞ 36V, PE ＞ 30mA are protected."on" position, ground wire electrified detection are real-time with indicating module
The voltage between attaching plug input E-N ends is monitored, the voltage exports after E-N voltage switches logic module carries out logical transition
Multistate switch signal, the output signal output linearity control voltage or height after E-N voltage follows module carries out ratio conversion
Level.Integrated module carries out the logical process that tri-state turns two condition to the signal again after paraphase control module carries out phase position conversion
(when integration module input is high level, export as high level；When integration module input is low level, export as low level；
When integration module input is pulse, export as high level).Low and high level after converted is sent to logic state transition module and entered
Row switch control output, when input be high level, is exported as low level, on the contrary is high level；The low level makes switching logic
Control module output cut-off, system has automatically turned on current mode defencive function during the state, if now ground line current detection module
When detecting ground wire leakage current, electric leakage dropout control module, electric leakage dropout control module driving electromagnetism will be output control signals to
Tripping coil performs trip protection action, realizes (such as：E-N ＞ 36V), ground wire leakage current is (such as：＞ 30mA) dual judgement protects
Protective function.
Ground line current protection is closed during E-N ＜ 36V, PE ＞ 30mA."on" position, ground wire electrified detection are real with indicating module
When monitor voltage between attaching plug input E-N ends, the voltage is defeated after E-N voltage switches logic module carries out logical transition
Go out multistate switch signal, the output signal output linearity control voltage or height after E-N voltage follows module carries out ratio conversion
Low level is (such as：Low level).Integrated module carries out tri-state turn to the signal again after paraphase control module carries out phase position conversion
The logical process of two condition is (such as：Export low level).Low level after converted is sent to logic state transition module and carries out switch control
Make and export high level, the high level makes switching logic control module export low level (saturation conduction), positive closing ground wire
Current detection module, ground line current defencive function is closed when realizing E-N ＜ 36V, PE ＞ 30mA.
E is no ground, E-N short circuits, E-L short circuits：Firing current defencive function."on" position, ground wire electrified detection and instruction
Module monitors the voltage between attaching plug input E-N ends in real time, and the voltage carries out logic through E-N voltage switches logic module and turned
Multistate switch signal (when detecting that E is no ground, E-N is short-circuit, the Δ v=0V between E-L short circuits or E-N), switch are exported after changing
Logic exports high level, and the high level exports high level after E-N voltage follows module carries out ratio conversion.The high level is through falling
Phase control module exports low level after carrying out phase position conversion, then integrated module carries out the high electricity of logical process output of two condition
It is flat；High level after converted is sent to logic state transition module and carries out switching control and export low level, and the low level makes out
Logic control module output high level (cut-off) enforced opening ground line current detection module is closed, realizes that E is no ground, and E-N is short
Road, ground line current defencive function is opened under E-L short-circuit modes.
E has ground connection：Export low level."on" position, it is defeated that ground wire electrified detection monitors attaching plug with indicating module in real time
Enter the voltage between E-N ends, the voltage exports multistate switch signal after E-N voltage switches logic module carries out logical transition
(when there is ground connection), switching logic output low level, the low level exports low after E-N voltage follows module carries out ratio conversion
Level.The low level exports high level after paraphase control module carries out phase position conversion, then integrated module carries out two condition
Logical process exports low level；Low level after converted is sent to logic state transition module and carries out switching control and export high electricity
Flat, the high level makes switching logic control module export low level (saturation conduction), positive closing ground line current detection module,
Realizing E has ground connection to close ground line current defencive function.
Preferred embodiment of the invention described in detail above.It should be appreciated that one of ordinary skill in the art without
Creative work can is needed to make many modifications and variations according to the design of the present invention.Therefore, all technologies in the art
Personnel are available by logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea
Technical scheme, all should be in the protection domain being defined in the patent claims.
Claims (10)
- A kind of 1. band full-automatic control circuit of earth leakage of overcurrent protective, it is characterised in that：Including over-current detection coil, adjust Economize on electricity resistance R1, divider resistance R2, divider resistance R3, reverse hold-off diode D1 and Full-automatic leaked non-electricity protector unit, electric leakage are protected Shield device load outputs live wire or zero line are installed with over-current detection coil, over-current detection coil output connection divider resistance R2, divide Piezoresistance R3 and reverse hold-off diode D1 is to dropout control module of leaking electricity, when load output current reaches default load current When, over-current detection coil output voltage will drive electric leakage dropout control module to make earth leakage protective device tripping operation power-off；Over-current detection line Circle is through on live wire or zero line, and the pin of over-current detection coil output one is connected on output zero line, and another pin concatenates divider resistance R2 and divider resistance R3 partial pressures, mid-point voltage are connected to electric leakage dropout control module input, excessively stream through reverse hold-off diode D1 Detection coil both ends and the regulation resistance R1 for being connected to overcurrent protection value；The Full-automatic leaked non-electricity protector unit includes power supply module, ground wire electrified detection and indicating module, E-N voltage switches are patrolled Collect module, E-N voltage follows module, paraphase control module, integration module, logic state transition module, switching logic control mould Block, ground line current detection module, zero sequence detection of electrical leakage module, electric leakage dropout control module, high temperature protection control module and electromagnetism Tripping coil, the power supply module connects ground wire electrified detection and indicating module and E-N voltage switch logic modules respectively, described Ground wire electrified detection passes sequentially through E-N voltage switches logic module, E-N voltage follows module, paraphase control mould with indicating module Block, integration module, logic state transition module, switching logic control module connect ground line current detection module respectively and electric leakage is de- Control module is detained, zero sequence detection of electrical leakage module, high temperature protection control module and the electromagnetic trip coil are all connected with electric leakage and threaded off Control module, the electromagnetic trip coil are also associated with experiment electric leakage voltage reduction module.
- 2. a kind of control method with the full-automatic control circuit of earth leakage of overcurrent protective using described in claim 1, It is characterized in that：The power supply module is available to the power supply of E-N voltage switch logic modules, the E-N voltage switches logic Module is to analyze the terminal voltage feature between power input E-N, and three kinds of state of a controls are exported according to voltage characteristic；The E-N voltages It is the size between direct proportion output E-N to follow module, high level is then exported when receiving high level, when receiving low level When then export low level, then export pulse when receiving pulse；The paraphase control module is to carry out the signal received Level conversion, the integration module are that E-N voltage follows output pulse signal carries out integration and pulse signal is converted into high level Or low level, after being detected using the logic decision of E-N voltage switches under extreme condition, system automatically switches into current mode guarantor Shield, prevent power input potential safety hazard, the control caused by the anti-phase rear socket ground wire disconnection of zero live wire and with live wire short circuit Different power utilization environments can more be adapted to automatically so as to more effectively realize by improving the safe mode in earth leakage protective device field again Safety utilization of electric power.
- A kind of 3. band overcurrent protective Full-automatic leaked non-electricity protector control method as claimed in claim 2, it is characterised in that：Institute Size of the E-N voltage switches logic module according to voltage between power utilization environment E-N is stated, intelligence exports three kinds of logics, three states.
- A kind of 4. band overcurrent protective Full-automatic leaked non-electricity protector control method as claimed in claim 3, it is characterised in that：Institute Stating three kinds of logics of intelligence output is respectively：E has ground connection：Export low level；E is no ground, E-N short circuits, E-L short circuits：Export high level；E is powered：Pulse is exported during E-N ＞ 18V.
- A kind of 5. band overcurrent protective Full-automatic leaked non-electricity protector control method as claimed in claim 4, it is characterised in that：Institute State power supply module to be attempted by between power supply L-N, output end is connected with E-N voltage switch logic modules, E-N voltage follows output arteries and veins Rushing signal and carrying out integration makes pulse signal be converted into high level or low level.
- A kind of 6. band overcurrent protective Full-automatic leaked non-electricity protector control method as claimed in claim 5, it is characterised in that：Institute State the indicating module and ground wire electrified detection and the connection side of the detection module of indicating module of ground wire electrified detection and indicating module To connect, the detection module of the indicating module and ground wire electrified detection and indicating module of ground wire electrified detection and indicating module is formula It is attempted by between power input E-N.
- A kind of 7. band overcurrent protective Full-automatic leaked non-electricity protector control method as claimed in claim 6, it is characterised in that：Institute State the size between E-N voltage follow modules direct proportion output E-N, as voltage ＞ 18V between E-N, E-N voltage follow modules Begin with voltage output, the voltage between E-N is bigger, and E-N voltage follow module output voltages are higher, maximum output voltage E- The supply voltage of N voltage follow modules.
- A kind of 8. band overcurrent protective Full-automatic leaked non-electricity protector control method as claimed in claim 7, it is characterised in that：Institute The logic state transition module stated receives the low and high level from integration module output, when detecting integration module output high level Low level is then exported, otherwise exports high level.
- A kind of 9. band overcurrent protective Full-automatic leaked non-electricity protector control method as claimed in claim 8, it is characterised in that：Institute State paraphase control module and receive the switching signal from the output of E-N voltage follows module, then export when input is high level and be Low level, on the contrary it is high level, and switching logic control module receives the switching signal for carrying out logic state transition module, when input is high Then exported during level as low level, otherwise output cut-off.
- A kind of 10. band overcurrent protective Full-automatic leaked non-electricity protector control method as claimed in claim 9, it is characterised in that： The ground line current detection module output end is controlled by the output control of switching logic control module, when switching logic control module When exporting low level, the ground line current detection module output will force shorted to earth, not allow ground line current to participate in electric leakage and protect Shield；When switching logic control module exports high level, the ground line current detection module output will participate in ground line current electric leakage Protection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711113754.8A CN107681629A (en) | 2017-11-01 | 2017-11-01 | The full-automatic control circuit of earth leakage of one kind band overcurrent protective and its method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711113754.8A CN107681629A (en) | 2017-11-01 | 2017-11-01 | The full-automatic control circuit of earth leakage of one kind band overcurrent protective and its method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107681629A true CN107681629A (en) | 2018-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711113754.8A Pending CN107681629A (en) | 2017-11-01 | 2017-11-01 | The full-automatic control circuit of earth leakage of one kind band overcurrent protective and its method |
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| Country | Link |
|---|---|
| CN (1) | CN107681629A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2512109Y (en) * | 2002-01-15 | 2002-09-18 | 董世荣 | Power circuit breaker with multifunctional protections |
| CN2874882Y (en) * | 2006-01-10 | 2007-02-28 | 任增辉 | Complex protective switch for lost phase, overcurrent and leakage |
| CN201781263U (en) * | 2010-05-10 | 2011-03-30 | 厦门振泰成科技有限公司 | Electric-shock protection wall overcurrent leakage protection circuit of wall switch |
| CN107086542A (en) * | 2017-05-25 | 2017-08-22 | 乐清市诚富电器科技有限公司 | Fully-automatic intelligent switch type control circuit of earth leakage and its method |
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2017
- 2017-11-01 CN CN201711113754.8A patent/CN107681629A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2512109Y (en) * | 2002-01-15 | 2002-09-18 | 董世荣 | Power circuit breaker with multifunctional protections |
| CN2874882Y (en) * | 2006-01-10 | 2007-02-28 | 任增辉 | Complex protective switch for lost phase, overcurrent and leakage |
| CN201781263U (en) * | 2010-05-10 | 2011-03-30 | 厦门振泰成科技有限公司 | Electric-shock protection wall overcurrent leakage protection circuit of wall switch |
| CN107086542A (en) * | 2017-05-25 | 2017-08-22 | 乐清市诚富电器科技有限公司 | Fully-automatic intelligent switch type control circuit of earth leakage and its method |
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