CN207320808U - A kind of band full-automatic control circuit of earth leakage of overcurrent protective - Google Patents

Abstract

It the utility model is related to Household electricity leakage protection device product technical field; especially a kind of band full-automatic control circuit of earth leakage of overcurrent protective, 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 firewire or zero curve 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.The utility model is compared with existing voltage-type earth leakage protective device, security higher, 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 security risk brought after power utilization environment mutation.

Description

A kind of band full-automatic control circuit of earth leakage of overcurrent protective

Technical field

Household electricity leakage protection device product technical field is the utility model is related to, especially a kind of band overcurrent protective is full-automatic Control circuit of earth leakage.

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 cannot 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 When meeting power outlet opposite polarity, receptacle grounds and short-circuit firewire, voltage-type earth leakage protective device will lose type earth leakage protective device Deprotection acts on.For this security risk, the utility model proposes a kind of band overcurrent protective Full-automatic leaked non-electricity protector (when with Earth leakage protective device can be automatically cut off during the fire hazard that electric loading generation overload or abnormal short circuit band come and intelligence adaptation is electric Control Cooling is switched to voltage-type to environment by dynamic in real time, current mode or voltage/current interlock control type) control mode solves The above problem.

Utility model content

The utility model aim is to overcome deficiency of the prior art, there is provided a kind of band overcurrent protective Full-automatic leaked Non-electricity protector control circuit, enhances earth leakage protective device security performance, and overcurrent protective fully-automatic intelligent earth leakage protective device can solve It can determine that the polymorphic form of ground wire electrification while the fire hazard certainly brought by load overcurrent, firewire particularly in power outlet With earth short caused by uneasy omnicharacteristic, solve power utilization environment under extreme condition and dash forward caused security risk.

In order to solve the above-mentioned technical problem, the utility model is to be achieved through the following technical solutions：

A kind of band full-automatic control circuit of earth leakage of overcurrent protective, 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 is defeated Outlet firewire or zero curve 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 modules.When load output current reaches default load current, over-current detection Coil output voltage will drive electric leakage dropout control module to make earth leakage protective device tripping power-off.Over-current detection coil be through firewire or On zero curve, one foot of over-current detection coil output is connected on output zero curve, another foot concatenation divider resistance R2 and divider resistance R3 partial pressures, mid-point voltage are connected to electric leakage dropout control module input terminal through reverse hold-off diode D1.Over-current detection coil both ends And it is connected to the regulation resistance R1 of overcurrent protection value.Full-automatic leaked non-electricity protector unit include power supply module, ground wire electrified detection with Indicating module, E-N voltage switches logic module, E-N voltage follows module, paraphase control module, integration module, logic state turn Change the mold block, switching logic control module, ground line current detection module, zero sequence detection of electrical leakage module, electric leakage dropout control module, height Temperature protection control module and electromagnetic trip coil.The power supply module connects ground wire electrified detection and indicating module and E-N respectively Voltage switch logic module.The ground wire electrified detection passes sequentially through E-N voltage switches logic module, E-N electricity with indicating module Pressure follows module, paraphase control module, integration module, logic state transition module, switching logic control module to connect ground respectively Line current detection module and electric leakage dropout control module.Zero sequence detection of electrical leakage module, high temperature protection control module and the electromagnetism Tripping coil is all connected with electric leakage dropout control module.The electromagnetic trip coil is also associated with experiment electric leakage voltage reduction module.

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 (duty cycle) is exported during E-N ＞ 18V.

Preferably, the power supply module is attempted by between power supply L-N, and output terminal 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 light) and ground wire electrified detection and finger Show the connection 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, the 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 exports when input high level as low level (output terminal presentation short-circuit condition), and otherwise (presentation is opened for output cut-off Line state).

Preferably, the ground line current detection module output terminal 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.

The utility model beneficial effect：The utility model is compared with existing voltage-type earth leakage protective device, security higher, According to power utilization environment auto-changeover control pattern, solution while the fire safety evaluating hidden danger that energy automatic identification electricity consumption load abnormal is brought The security risk brought after power utilization environment of having determined mutation.Judge to detect under extreme condition using E-N voltage switches logic module After (E-L direct short-circuits), system automatically switches into current mode protection, this kind of control mode can prevent power input in zero fire The anti-phase rear socket ground wire of line disconnect and with firewire short circuit caused by security risk, improve the safety in earth leakage protective device field again Pattern can more adapt to different power utilization environments automatically so as to more effectively realize safety utilization of electric power.

Make furtherly below with reference to the technique effect of design of the attached drawing to the utility model, concrete structure and generation It is bright, to be fully understood from the purpose of this utility model, feature and effect.

Brief description of the drawings

Fig. 1 is the electrical block diagram of the utility model.

Embodiment

The embodiment of the utility model is described in detail below in conjunction with attached drawing, but the utility model can be by right It is required that the multitude of different ways for limiting and covering is implemented.

As shown in Figure 1, a kind of band full-automatic control circuit of earth leakage of overcurrent protective, 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.Electric leakage Protector load outputs firewire or zero curve 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 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 power-off.Over-current detection line Circle is through on firewire or zero curve, and one foot of over-current detection coil output is connected on output zero curve, and another foot concatenates divider resistance R2 and divider resistance R3 partial pressures, mid-point voltage are connected to electric leakage dropout control module input terminal through reverse hold-off diode D1.Overcurrent 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 patrols 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 electric leakage dropout control module.The electromagnetic trip coil is also associated with experiment electric leakage drop Die block.

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 the terminal voltage feature analyzed 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 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 security risk caused by the anti-phase rear socket ground wire disconnection of zero firewire and with firewire 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 (duty cycle) is exported during E-N ＞ 18V.

Further, the power supply module is attempted by between power supply L-N, and output terminal 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 light) and ground wire electrified detection with The connection 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, the 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 terminal presentation short-circuit condition), otherwise output cut-off (is presented Open-circuit condition).

Further, the ground line current detection module output terminal 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 It will participate in ground line current earth leakage protective.

The utility model is compared with existing voltage-type earth leakage protective device, security higher, can automatic identification electric loading According to power utilization environment auto-changeover control pattern while the fire safety evaluating hidden danger that abnormal belt is come, after solving power utilization environment mutation The security risk brought.Judged using E-N voltage switches logic module after detecting under extreme condition (E-L direct short-circuits), be System automatically switches into current mode protection, this kind of control mode can prevent power input from breaking in the anti-phase rear socket ground wire of zero firewire Open and with firewire short circuit caused by security risk, improving the safe mode in earth leakage protective device field again can more adapt to not automatically Same power utilization environment is so as to more effectively realize safety utilization of electric power.

Operation principle：

Overcurrent protection：During loaded work piece, when overcurrent detection coil detects high current (systemic presupposition electric current), overcurrent After the partial pressure of divider resistance R2 and divider resistance R3, mid-point voltage is sent detection coil output voltage through reverse hold-off diode D1 Power-off tripping 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 are supplied to E-N voltage switches logic module Electricity, after obtaining electricity, E-N voltage switches logic module judges and exports 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 (duty cycle)；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, which exports after E-N voltage switches logic module carries out logical transition Multistate switch signal, the output signal export Linear 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 be sent to logic state transition module into Row switch control output, when input be high level, exports 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 ground line current detection module at this time 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, which exports Linear 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, which 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, which carries out logic through E-N voltage switches logic module and turn 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, which 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 switch control and export low level, which 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, which 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, which 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 switch control and export high electricity Flat, which 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.

The preferred embodiment of the utility model described in detail above.It should be appreciated that the ordinary skill people of this area Member according to the present utility model can conceive without creative work makes many modifications and variations.Therefore, all this technology necks Technical staff passes through logic analysis, reasoning or limited reality on the basis of existing technology according to the design of the utility model in domain Available technical solution is tested, all should be in the protection domain being defined in the patent claims.

Claims (4)

1. 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 firewire or zero curve are installed with over-current detection coil, and 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 power-off；Over-current detection line Circle is through on firewire or zero curve, and one foot of over-current detection coil output is connected on output zero curve, and another foot concatenates divider resistance R2 and divider resistance R3 partial pressures, mid-point voltage are connected to electric leakage dropout control module input terminal, overcurrent through reverse hold-off diode D1 Detection coil both ends and the regulation resistance R1 for being connected to overcurrent protection value.
2. A kind of 2. band full-automatic control circuit of earth leakage of overcurrent protective as claimed in claim 1, it is characterised in that：Institute Stating Full-automatic leaked non-electricity protector unit includes power supply module, ground wire electrified detection and indicating module, E-N voltage switch logic moulds Block, E-N voltage follows module, paraphase control module, integration module, logic state transition module, switching logic control module, Line current detection module, zero sequence detection of electrical leakage module, electric leakage dropout control module, high temperature protection control module and electromagnetic trip line Circle, the power supply module connect ground wire electrified detection and indicating module and E-N voltage switch logic modules, the ground strip respectively Electro-detection passes sequentially through E-N voltage switches logic module, E-N voltage follows module, paraphase control module, integration with indicating module Module, logic state transition module, switching logic control module connect ground line current detection module respectively and electric leakage is threaded off and controlled Module, zero sequence detection of electrical leakage module, high temperature protection control module and the electromagnetic trip coil are all connected with electric leakage dropout control mould Block, the electromagnetic trip coil are also associated with experiment electric leakage voltage reduction module.
3. A kind of 3. band full-automatic control circuit of earth leakage of overcurrent protective as claimed in claim 2, it is characterised in that：Institute State power supply module to be attempted by between power supply L-N, output terminal is connected with E-N voltage switch logic modules.
4. A kind of 4. band full-automatic control circuit of earth leakage of overcurrent protective as claimed in claim 2, 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.