CN206992676U - A kind of zero sequence is inverted from locking-typed control circuit of earth leakage - Google Patents
A kind of zero sequence is inverted from locking-typed control circuit of earth leakage Download PDFInfo
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- CN206992676U CN206992676U CN201720638616.0U CN201720638616U CN206992676U CN 206992676 U CN206992676 U CN 206992676U CN 201720638616 U CN201720638616 U CN 201720638616U CN 206992676 U CN206992676 U CN 206992676U
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Abstract
It the utility model is related to Household electricity leakage protection device product technical field; especially a kind of zero sequence is inverted from locking-typed control circuit of earth leakage, including ground wire electrified detection and indicating module, ground wire voltage follow module, voltage logic analysis module, paraphase control module, threshold detection module, from locking module, switching logic control module, ground line current detection module, zero sequence detection of electrical leakage module, electric leakage dropout control module, high temperature protection control module and electromagnetic trip coil.The utility model beneficial effect：Compared with existing voltage-type earth leakage protective device technology, security is higher, energy automatic identification and switching control pattern, solves the potential safety hazard brought after power utilization environment mutation.
Description
Technical field
Household electricity leakage protection device product technical field is the utility model is related to, especially a kind of zero sequence is inverted from locking-typed leakage
Non-electricity protector control circuit.
Background technology
Existing earth leakage protective device has voltage-type and current mode and voltage/current interlocking control type, the type product excellent
Putting is：By artificially selecting to protect type to reach more preferable versatility to adapt to power utilization environment with this.Shortcoming is：When attached
Earth leakage protective device can not be tackled constantly when product later stage power utilization environment is undergone mutation, such as：It is preset in advance to be leaked electricity using voltage-type
Protector is when meeting power outlet opposite polarity, and when receptacle grounds are with live wire short circuit, device is protected in now voltage-type leakage will lose protection
Effect.For this potential safety hazard, locking-typed earth leakage protective device protected mode is inverted from the utility model proposes zero sequence to solve
State potential safety hazard.
Utility model content
The purpose of the utility model is to overcome deficiency of the prior art, there is provided a kind of zero sequence is inverted from locking-typed electric leakage
Protector control circuit, whether electric power polarity is judged on the contrary, when the error-polarity connection after using the voltage between detection E-N, system
Current mode leakage protector will be locked into automatically to avoid the potential safety hazard that power utilization environment mutation is brought.
In order to solve the above-mentioned technical problem, the utility model is to be achieved through the following technical solutions：
A kind of zero sequence is inverted from locking-typed control circuit of earth leakage, including ground wire electrified detection and indicating module,
Line voltage follow module, voltage logic analysis module, paraphase control module, threshold detection module, from locking module, switching logic
Control module, ground line current detection module, zero sequence detection of electrical leakage module, electric leakage dropout control module, high temperature protection control module
With electromagnetic trip coil.The ground wire electrified detection follows module to be connected voltage logic respectively with indicating module by ground wire voltage
Analysis module and threshold detection module.The voltage logic analysis module is by swinging to control module connecting valve logic control mould
Block.The threshold detection module is by from locking module connecting valve Logic control module.The switching logic control module point
Lian Jie not ground line current detection module and electric leakage dropout control module.The ground line current detection module, zero sequence detection of electrical leakage mould
Block, high temperature protection control module and electromagnetic trip coil are all connected with dropout control module of leaking electricity.The electromagnetic trip coil also connects
It is connected to experiment electric leakage voltage reduction module.
Preferably, the indicating module of the ground wire electrified detection and indicating module (LED) and ground wire electrified detection and finger
The connected mode for showing the ground wire electrified detection module of module is " series connection ".Ground wire electrified detection and indicating module are to be attempted by power supply
Input between E-N.
The utility model beneficial effect：The utility model security is higher, energy automatic identification and switching control pattern, enhancing
Earth leakage protective device security performance, improves earth leakage protective device adaptive characteristic, solves under extreme condition, and power utilization environment is prominent to be drawn
The potential safety hazard risen, the detection method of power outlet phase can be identified, power supply pole is judged using the voltage between detection E-N
Property whether on the contrary, when error-polarity connection, system automatic will be locked into current mode leakage protector to avoid power utilization environment from being mutated band
The potential safety hazard come.
Design, concrete structure and caused technique effect of the present utility model are made furtherly below with reference to accompanying drawing
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 structural representation of the present utility model.
Embodiment
Embodiment of the present utility model is described in detail below in conjunction with accompanying 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 zero sequence is inverted from locking-typed control circuit of earth leakage, including ground wire electrified detection with referring to
Show that module, ground wire voltage follow module, voltage logic analysis module, paraphase control module, threshold detection module, self-locking cover half
Block, switching logic control module, ground line current detection module, zero sequence detection of electrical leakage module, electric leakage dropout control module, high temperature dwell
Protect control module and electromagnetic trip coil.The ground wire electrified detection follows module to connect respectively with indicating module by ground wire voltage
Connect voltage logic analysis module and threshold detection module.The voltage logic analysis module is by swinging to control module connecting valve
Logic control module.The threshold detection module is by from locking module connecting valve Logic control module.The switching logic
Control module connects ground line current detection module and electric leakage dropout control module respectively.The ground line current detection module, 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 electromagnetism takes off
Fastening wire circle is also associated with experiment electric leakage voltage reduction module.
Further, the zero sequence be inverted from locking-typed earth leakage protective device when the live wire of power outlet zero it is reversed, respective socket
Zero (N) hole site will be live wire (L), and now the pin position hole and protecting field (E) hole will be phase voltages.The status system will lock automatically
It is fixed to change protected mode, the mould automatically into ground line current defencive function to open state and no longer changing with input electric power polarity
Formula can automatically terminate after socket terminates power supply or trip protection.The voltage logic analysis module is analysis power input
Whether the terminal voltage between E-N is less than, if then otherwise ground line current will not participate in protection will open ground line current protected mode.
Threshold detection module is the identification conversion for differentiating that zero live wire is reversed.It is described from locking module be positive lock ground line current protection work(
Opening can be maintained at, can prevent power input from being disconnected in the anti-phase rear socket ground wire of zero live wire and be caused with live wire short circuit
Potential safety hazard.The control improve again earth leakage protective device field safe mode be suitable for different power utilization environments so as to
More effectively realize safety utilization of electric power.
Further, whether the threshold detection module is much larger than for the terminal voltage identified between power input E-N
36V judges, then exports high level when E-N voltages are much larger than 36V, otherwise exports low level.
Further, it is described from locking module be receive from threshold detection module output high and low Automatic level control.When connecing
Receive 1 time and then export when being high level and be locked as high level immediately, this state will persistently be maintained to interrupt power supply supplier of electricity and can solved
Remove；When receiving from threshold detection module output low level, low level is exported from locking module.
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 ground wire electrified detection module of indicating module is " series connection ".Ground wire electrified detection and indicating module are to be attempted by electricity
Between source input E-N.
Further, the ground wire voltage follows the size between module direct proportion output E-N, as voltage ＞ between E-N
During 18V, ground wire voltage follows module to begin with voltage output, and the voltage between E-N is bigger, and ground wire voltage follows module output electricity
Pressure is higher, and maximum output voltage is the supply voltage that ground wire voltage follows module.
Further, the voltage logic analysis module receives follows module output voltage from ground wire voltage, works as detection
It is more than (such as to direct proportion and E-N input terminal voltages：36V), then high level is exported, otherwise exports low level.
The further paraphase control module receives the switching signal from the output of voltage logic analysis module, works as voltage
When logic analysis module exports high level, otherwise paraphase control module output high level exports low level.
Further, the switching logic control module is received from paraphase control module and exported from locking module respectively
Switching signal control, when it be high level to receive any one switching signal, Switch logic export low level, otherwise
Output cut-off, switching logic controlled synchronous and input dynamic change.
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 output of ground line current detection module will force shorted to earth, not allow ground wire
Electric current participates in earth leakage protective；When switching logic control module exports high level, the output of ground line current detection module will participate in ground
Line current earth leakage protective.
The utility model security is higher, energy automatic identification and switching control pattern, enhances earth leakage protective device security
Can, earth leakage protective device adaptive characteristic is improved, is solved under extreme condition, the prominent caused potential safety hazard of power utilization environment can
The detection method of power outlet phase is identified, judges electric power polarity whether on the contrary, working as polarity using the voltage between detection E-N
During reversal connection, system will be locked into current mode leakage protector automatically to avoid the potential safety hazard that power utilization environment mutation is brought.
Operation principle
Voltage x current judges simultaneously："on" position, ground wire electrified detection constantly monitor attaching plug input with indicating module
Voltage between E-N ends, voltage output linearity control voltage after ground wire voltage follows module to carry out ratio conversion.Work as voltage
Logic analysis module detects direct proportion (such as：E-N ＞ 36V) when, output high level to paraphase control module and makes paraphase module
Low level is exported, the low level makes the output cut-off of switching logic control module, and system has automatically turned on current mode guarantor during the state
Protective function, if now ground line current detection module detects ground wire leakage current, electric leakage dropout control will be output control signals to
Module, electric leakage dropout control module driving electromagnetic trip coil perform trip protection action, realized (such as：E-N ＞ 36V), ground
Line leakage current is (such as：＞ 30mA) dual judgement defencive function.
Automatic locking：When inserting attaching plug, the terminal voltage between power input E-N is detected is much larger than 36V (such as：
More than 50V), voltage output linearity control voltage after ground wire voltage follows module to carry out ratio conversion.When voltage logic point
Analysis module detects direct proportion (such as：E-N ＞ 36V) when, output high level to paraphase control module simultaneously makes the output of paraphase module low
Level, the low level make the output cut-off of switching logic control module, and system has automatically turned on current mode defencive function during the state.
At the same time, threshold detection module is controlled turns on and exports high level to from locking module.Now, high electricity is exported from locking module
Put down and maintain locking (this lock-out state will be maintained to can automatically terminate after power outlet interruption of power supply；Under this shape, if power supply is inserted
Zero live wire of seat is opposite and ground wire and live wire are short-circuit, i.e.,：Δ v=0V between E-N, it is locking-typed to maintain ground line current protection mould
Formula).If now ground line current detection module detects ground wire leakage current, electric leakage dropout control mould will be output control signals to
Block, electric leakage dropout control module driving electromagnetic trip coil perform trip protection action, realized (such as：E-N ＞ 36V), ground wire
Leakage current is (such as：＞ 30mA) dual judgement defencive function.
Preferred embodiment of the present utility model described in detail above.It should be appreciated that the ordinary skill people of this area
Member makes many modifications and variations without creative work can according to design of the present utility model.Therefore, all this technology necks
Technical staff passes through logic analysis, reasoning or limited reality on the basis of existing technology according to design of the present utility model in domain
Available technical scheme is tested, all should be in the protection domain being defined in the patent claims.
Claims (2)
1. a kind of zero sequence is inverted from locking-typed control circuit of earth leakage, it is characterised in that：Including ground wire electrified detection with referring to
Show that module, ground wire voltage follow module, voltage logic analysis module, paraphase control module, threshold detection module, self-locking cover half
Block, switching logic control module, ground line current detection module, zero sequence detection of electrical leakage module, electric leakage dropout control module, high temperature dwell
Shield control module and electromagnetic trip coil, the ground wire electrified detection follow module to connect respectively with indicating module by ground wire voltage
Voltage logic analysis module and threshold detection module are connect, the voltage logic analysis module is by swinging to control module connecting valve
Logic control module, the threshold detection module is by from locking module connecting valve Logic control module, the switching logic
Control module connects ground line current detection module and electric leakage dropout control module, the ground line current detection module, zero sequence respectively
Detection of electrical leakage module, high temperature protection control module and electromagnetic trip coil are all connected with dropout control module of leaking electricity, and the electromagnetism takes off
Fastening wire circle is also associated with experiment electric leakage voltage reduction module.
2. a kind of zero sequence as claimed in claim 1 is inverted from locking-typed control circuit of earth leakage, it is characterised in that：It is described
The indicating module of ground wire electrified detection and indicating module and ground wire electrified detection and the ground wire electrified detection module of indicating module
Connected mode is " series connection ", and ground wire electrified detection and indicating module are attempted by between power input E-N.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720638616.0U CN206992676U (en) | 2017-05-25 | 2017-05-25 | A kind of zero sequence is inverted from locking-typed control circuit of earth leakage |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720638616.0U CN206992676U (en) | 2017-05-25 | 2017-05-25 | A kind of zero sequence is inverted from locking-typed control circuit of earth leakage |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107017606A (en) * | 2017-05-25 | 2017-08-04 | 乐清市诚富电器科技有限公司 | A kind of zero sequence is inverted from locking-typed control circuit of earth leakage and its method |
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2017
- 2017-05-25 CN CN201720638616.0U patent/CN206992676U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107017606A (en) * | 2017-05-25 | 2017-08-04 | 乐清市诚富电器科技有限公司 | A kind of zero sequence is inverted from locking-typed control circuit of earth leakage and its method |
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