CN204809836U - Can detect whether lightning protection subassembly damages and convenient lightning protection type electric leakage circuit breaker of changing - Google Patents

Can detect whether lightning protection subassembly damages and convenient lightning protection type electric leakage circuit breaker of changing Download PDF

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Publication number
CN204809836U
CN204809836U CN201520339678.2U CN201520339678U CN204809836U CN 204809836 U CN204809836 U CN 204809836U CN 201520339678 U CN201520339678 U CN 201520339678U CN 204809836 U CN204809836 U CN 204809836U
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CN
China
Prior art keywords
circuit breaker
lightning protection
protection module
contact
lightning
Prior art date
Application number
CN201520339678.2U
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Chinese (zh)
Inventor
陈定吉
伍小鹏
冯喜军
Original Assignee
陈定吉
伍小鹏
冯喜军
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Application filed by 陈定吉, 伍小鹏, 冯喜军 filed Critical 陈定吉
Priority to CN201520339678.2U priority Critical patent/CN204809836U/en
Application granted granted Critical
Publication of CN204809836U publication Critical patent/CN204809836U/en

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Abstract

The utility model discloses a detect enough whether the lightning protection module is damaged and the convenient lightning protection type electric leakage circuit breaker of changing, including electric leakage circuit breaker parent, lightning protection module and condenser, its characterized in that: the lightning protection module is parallelly connected with piezo -resistor again after being established ties with the hot melt switch by current -limiting resistor, forms two wiring ends, the lightning protection module is parallelly connected with zero line, live wire in the circuit breaker, and the load end at the circuit breaker is connected to its one end, and the input of mutual -inductor in the circuit breaker is connected to the other end, and its current path strides across the mutual -inductor, capacitor parallel connects at the load end. The advantage of this circuit breaker: piezo -resistor transshipped when becoming invalid, and the automatic circuit of following breaks off, and simultaneously current -limiting resistor access circuit, electric leakage circuit breaker detection can't close a floodgate to leaking electricity to the suggestion user changes the lightning protection module, under the case of emergency, pull out the lightning protection module, the electric leakage circuit breaker still can normally be worked, does not just have the lightning protection function, the modularized design, the convenient change when lightning protection module lost efficacy.

Description

Whether a kind of lightning protection component that can detect damages and the lighning proof type residual current circuit breaker be convenient for changing
Technical field
The present invention relates to residual current circuit breaker technical field, particularly whether a kind of lightning protection component that can detect damages and the lighning proof type residual current circuit breaker be convenient for changing.
Background technology
The current transformer used in residual current circuit breaker, when primary side has residual current, its secondary side can produce induced current, makes the electromagnetic actuation action of release, disconnect is disconnected, cuts off the electricity supply via amplifier after amplifying.
Existing power port lightning-protected product, uses the most extensive with Surge Protector, and it must meet a condition in use: install independently earth connection.For vast rural area, earth connection is not installed in most house, and almost nobody is ready to install earth connection in addition to install Surge Protector, and therefore, rural area uses considerably less.
Existing lighning proof type residual current circuit breaker, several disclosed technology, lightning protection function is realized on residual current circuit breaker, as utility model patent 201520024270.6, its schematic diagram is as shown in figure (1), its lightning-protection module damages has no idea to detect, and continuing use will no longer have lightning protection effect; If lightning-protection module damages, need whole circuit breaker to change, inconvenient, cost is also high.
Summary of the invention
In order to overcome above-mentioned shortcoming with not enough, whether the object of this invention is to provide a kind of needs installs earth connection, can detect lightning protection component and damage and the lighning proof type residual current circuit breaker be convenient for changing, it installs additional on former residual current circuit breaker basis can plug lightning-protection module, when lightning surge arrives, automatic disconnection input power, protects the safety of electrical equipment below; If lightning protection component damages, circuit breaker will close not brake application, and prompting user changes lightning protection component.
The technical scheme realizing the object of the invention is:
A kind of lighning proof type residual current circuit breaker, schematic diagram, as shown in figure (2), comprises residual current circuit breaker parent, lightning-protection module and capacitor; Described residual current circuit breaker parent is designed with slot, as shown in figure (6), slot both sides have hard contact M ' and N ' respectively, its contact M ', and N ', be connected with the zero line in circuit breaker, phase line respectively, one of them contact is connected to the load end of circuit breaker, another contact is connected across the input of instrument transformer in circuit breaker, and makes the current path flowing through M ' and N ' stride across instrument transformer.
Described lightning-protection module is plug type, and as shown in figure (5), module both sides have hard contact M and N, fixing flank 27 respectively; When lightning-protection module inserts circuit breaker parent, contact M and N in module connects with contact M ', the N ' on circuit breaker parent slot both sides respectively.
Described lightning-protection module comprises piezo-resistance, current-limiting resistance and hot melt switch; As shown in figure (3), an electrode 32 of described piezo-resistance 22 is by wire 30 connection metal contact M; Another electrode 33 is welded with sheet metal 26 by low melting point scolding tin 31, and sheet metal 26 is connected with another contact N by wire 28, makes to form a loop by piezo-resistance 22 between contact M, N; Described current-limiting resistance R two ends are by wire connecting terminal M and metal column 24 respectively, and metal column 24 and sheet metal 26 are discontiguous; Described hot melt switch, comprises spring 25, metal column 24, sheet metal 26, piezoresistance electrode 33, low melting point scolding tin 31.
Described capacitor 7 is connected in parallel on circuit breaker load end, plays elimination impulse disturbances, prevents misoperation, makes the effect that circuit working is more stable.
When surge voltage arrives, as shown in figure (2), piezo-resistance 12 conducting, have electric current to flow through, instrument transformer 3 primary side produces residual current, thus produces induced current at instrument transformer secondary side, amplify through amplifier 4, make release 5 action, disconnect 6 disjunction; Meanwhile, piezo-resistance also plays the effect of the voltage difference between restriction zero line and phase line, protects circuit breaker security appliance below.
When surge current is excessive, the disjunction of circuit breaker disconnect, piezo-resistance is transshipped, and as shown in figure (4), now piezo-resistance 22 can lose efficacy, and its amount of heat produced is conducted by pin 33, makes low melting point solder joint 31 micro-molten; Under spring 25 acts on, sheet metal 26 moves down, and is separated with piezo-resistance pin 33, contacts with metal column 24; Current-limiting resistance 34 is connected to contact N by sheet metal 26 and the contact of metal column 24, make to be connected to form current path by current-limiting resistance R between M and N of contact, now, residual current circuit breaker cannot be closed a floodgate because there is electric leakage, thus reminding user to replace lightning protection component.
When the present invention is used for DZ47LE type residual current circuit breaker, its schematic appearance is as shown in figure (7).
When the present invention is used for DZ15LE type residual current circuit breaker, its schematic appearance is as shown in figure (8).
The present invention has the following advantages and beneficial effect: the residual current circuit breaker of band lightning protection function of the present invention, does not need to install earth connection; When lightning surge comes, automatically can disconnect input power; When lightning-protection module is damaged by large inrush current shock, automatically connect current-limiting resistance, make to produce leakage current between zero line and phase line, circuit breaker cannot be closed a floodgate, thus prompting user changes lightning-protection module; Under emergency conditions, take down lightning-protection module, it is again a merit can completely residual current circuit breaker, can continue to use, but does not now have lightning protection function, need insert lightning-protection module as early as possible.
Accompanying drawing explanation
Fig. 1 is existing lighning proof type residual current circuit breaker circuit theory diagrams:
Fig. 2 is embodiment lighning proof type residual current circuit breaker circuit theory diagrams;
In figure, 1. zero line 2. live wire 3. instrument transformer 4. amplifier 5. release 6. disconnect 7. capacitor 8. lightning protection component 9. low melting point scolding tin 10. spring 11. current-limiting resistance 12. piezo-resistance.
Fig. 3 is lightning-protection module internal structure normal condition schematic diagram;
Fig. 4 is lightning-protection module internal structure cause thermal damage view;
In figure, 21. shell 22. piezo-resistance 23. state indicating window 24. metal column 25. spring 26. sheet metals 27. fix flank 28. strand copper wire 29. fulcrum 30. strand copper wire 31. low melting point scolding tin 32. piezoresistance electrode A33. piezoresistance electrode B34. current-limiting resistance M. hard contact N. hard contact
Fig. 5 is lightning-protection module schematic appearance;
In figure, flank M. hard contact N. hard contact fixed by 23. observation windows 27.
Fig. 6 is that DZ47LE type residual current circuit breaker is as schematic appearance during parent;
In figure, 41. parent A42. parent B43. testing button 44. holddown groove M. hard contact N. hard contacts
Fig. 7 is that lightning-protection module is for schematic appearance during DZ47LE type residual current circuit breaker.
In figure, 23. observation window 41. parent A42. parent B43. testing button 44. holddown grooves
Fig. 8 is that lightning-protection module is for schematic appearance during DZ15LE type residual current circuit breaker.
In figure, 1. lightning-protection module 2. slot 3. circuit breaker parent
Embodiment
Below in conjunction with drawings and Examples, content of the present invention is further elaborated, but is not limitation of the invention.
Embodiment:
With reference to figure (2), a kind of lightning-proof electric leakage circuit breaker, comprises residual current circuit breaker parent, lightning-protection module and capacitor; Described residual current circuit breaker parent is designed with slot, described slot both sides have hard contact M ' and N ' respectively, described hard contact M ' is connected with phase line 2 at instrument transformer 3 input, and metal dots N ' is connected with zero line 1 at the load end of circuit breaker, and the current path of M ' to N ' strides across instrument transformer.
Described lightning-protection module 8, comprise piezo-resistance 12, current-limiting resistance 11 and hot melt switch 9,10, by the mode of figure (2), current-limiting resistance is in parallel with piezo-resistance again after connecting with hot melt switch, forms two terminals; Two terminals of described lightning-protection module 8 are connected with hard contact M ', N ' in circuit breaker parent slot respectively.
Lightning-protection module 8 makes plug type, and figure (3) is its internal structure normal condition schematic diagram, and shell 21 internal fixtion has piezo-resistance 22, and piezo-resistance electrode 32 is connected to hard contact M by multiply copper conductor 30; Another electrode 33 of piezo-resistance is connected with sheet metal 26 top by low melting point scolding tin 31, and sheet metal 26 is connected to hard contact N by multiply copper conductor 28; Spring 25 holds sheet metal 26 downwards; Sheet metal 26 is what to separate with metal column 24; Current-limiting resistance 34 two ends are connected with metal column 24 and hard contact M respectively by wire; Fixing flank 27 plays fixation when lightning-protection module inserts circuit breaker slot, and fulcrum 29 is for support metal sheet 26, and state indicating window 23 sees the green of sheet metal bottom.
Described capacitor 7 is connected in parallel on circuit breaker load end, and it is withstand voltage is more than or equal to 1.414 times of pressure sensitive voltage, desirable 0.2 ~ 1.0 μ F of capacity, optimum value 0.47 μ F.Easily purchase from the viewpoint of element and can select 0.22 μ F, 0.27 μ F or 0.3 μ F etc.
When surge voltage arrives, shown in figure (2), piezo-resistance RV conducting, instrument transformer primary side has residual current, thus produces induced current at instrument transformer 3 secondary side, amplifies, makes release 5 action, disconnect 6 disjunction through amplifier 4; Meanwhile, piezo-resistance RV also plays the effect of the voltage difference between restriction zero line 1 and live wire 2, and protect circuit breaker security appliance below, capacitor 7 plays elimination pulse voltage, prevents the effect of misoperation.
Figure (4) for lightning-protection module damaged by surge impact after view, when surge current is excessive, piezo-resistance 22 crosses cause thermal damage, and its heat passes to electrode 33, makes low melting point scolding tin 31 micro-molten, sheet metal 26 moves down under the effect of spring 25 pulling force, sheet metal 26 is separated with electrode 33, contacts with metal column 24, state indicating window 3 sees the redness of gauge sheet metal upper, now, piezo-resistance 22 departs from, between the zero line that current-limiting resistance 14 has been parallel to power supply and phase line from power supply; Now circuit breaker is in tripped condition, and when user closes a floodgate, current-limiting resistance 34 has electric current to pass through, and residual current circuit breaker has detected leakage current, and it cannot be closed a floodgate, thus prompting user changes lightning-protection module; If user does not temporarily have lightning-protection module at one's side, bad module can be extracted, residual current circuit breaker still can normally work, and does not just now have lightning protection function, need insert new lightning-protection module as early as possible.
The value of current-limiting resistance, should determine according to residual current circuit breaker desired action current, as: desired action current 30mA, desirable 2.7-3k Ω; Desired action current 50mA, desirable 2-2.2k Ω.
Figure (7) be lightning-protection module for appearance model figure during DZ47LE type residual current circuit breaker, its electrical schematic diagram as figure (2) shown in.
Figure (8) be lightning-protection module for appearance model figure during DZ15LE type residual current circuit breaker, its electrical schematic diagram as figure (2) shown in.
Above embodiment is one embodiment of the present invention, but embodiments of the present invention are not limited thereto, and changes a little, can make numerous embodiments: as, current-limiting resistance is changed into 100k Ω series connection circuit of LED, circuit disconnects at ordinary times, and lamp does not work; After piezo-resistance is damaged by surge impact, circuit is switched on, LED lighting, and lightning-protection module is changed in prompting; For another example, lightning-protection module is inner, also can change a little, can realize piezo-resistance equally and disconnect, simultaneously the effect of another road circuit ON.All these do not depart from the change, replacement etc. of substantial principle of the present invention, all in protection scope of the present invention.

Claims (5)

1. can detect lightning protection component whether to damage and the lighning proof type residual current circuit breaker be convenient for changing, comprise residual current circuit breaker parent, lightning-protection module and capacitor; Described residual current circuit breaker parent is designed with slot, and slot both sides have hard contact M ', N ' respectively; Contact M ', N ' are connected with the zero line in circuit breaker, phase line respectively, and one of them contact is connected to the load end of circuit breaker, and another contact is connected across the input of instrument transformer in circuit breaker, and the current path flowing through M ' and N ' strides across instrument transformer.
2. lighning proof type residual current circuit breaker according to claim 1, is characterized in that: described lightning-protection module is plug type, and module both sides are designed with hard contact M, N, connects the contact M ' in parent slot and N ' when it inserts parent respectively.
3. lighning proof type residual current circuit breaker according to claim 1, is characterized in that: described lightning-protection module comprises piezo-resistance, current-limiting resistance and hot melt switch; Described current-limiting resistance is in parallel with piezo-resistance again after connecting with hot melt switch, forms two terminals, is connected respectively to hard contact M, the N on module both sides.
4. lighning proof type residual current circuit breaker according to claim 3, is characterized in that: described lightning-protection module is inner, comprises piezo-resistance (22), current-limiting resistance (34) and hot melt switch; An electrode (32) of described piezo-resistance (22) is by wire (30) connection metal contact M; Another electrode (33) is connected with sheet metal (26) by low melting point scolding tin (31), and sheet metal (26) is connected with another hard contact N by wire (28); Described current-limiting resistance (R) two ends are by wire connecting terminal M and metal column (24) respectively, and metal column (24) and sheet metal (26) are discontiguous; Described hot melt switch, comprises spring (25), metal column (24), sheet metal (26), piezoresistance electrode (33), low melting point scolding tin (31); Under normal circumstances, contact M is by forming a loop between piezo-resistance (22) and another contact N; After piezo-resistance crosses cause thermal damage, scolding tin (31) is micro-molten, sheet metal (26) moves down under the effect of spring (25), sheet metal (26) is separated with piezoresistance electrode (33), simultaneously, sheet metal (26) moves down and contacts conducting with metal column (24), and then makes contact M form loop by current-limiting resistance (34) with another contact N.
5. lighning proof type residual current circuit breaker according to claim 1, is characterized in that: described capacitor is connected in parallel on the load end of residual current circuit breaker.
CN201520339678.2U 2015-05-22 2015-05-22 Can detect whether lightning protection subassembly damages and convenient lightning protection type electric leakage circuit breaker of changing CN204809836U (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106300242A (en) * 2015-05-25 2017-01-04 广西荔浦深蓝电子有限公司 A kind of universal uneven formula overvoltage lightning protection circuit
CN106680632A (en) * 2016-12-30 2017-05-17 杭州后博科技有限公司 Iron tower lightning protection performance detection method based on electromagnetic radiation abnormity determination and system
CN107666138A (en) * 2017-09-29 2018-02-06 广东洲明节能科技有限公司 LED street lamp lightning protection device failure monitor system
CN107809103A (en) * 2016-09-08 2018-03-16 浙江正泰电器股份有限公司 Lighning proof type residual current action breaker
CN107809101A (en) * 2016-09-08 2018-03-16 浙江正泰电器股份有限公司 Overvoltage protection device

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106300242A (en) * 2015-05-25 2017-01-04 广西荔浦深蓝电子有限公司 A kind of universal uneven formula overvoltage lightning protection circuit
CN106300242B (en) * 2015-05-25 2018-11-09 广西荔浦深蓝电子有限公司 A kind of universal uneven formula overvoltage lightning protection circuit
CN107809103B (en) * 2016-09-08 2019-12-06 浙江正泰电器股份有限公司 Lightning protection type residual current operated circuit breaker
CN107809103A (en) * 2016-09-08 2018-03-16 浙江正泰电器股份有限公司 Lighning proof type residual current action breaker
CN107809101A (en) * 2016-09-08 2018-03-16 浙江正泰电器股份有限公司 Overvoltage protection device
CN107809101B (en) * 2016-09-08 2019-12-06 浙江正泰电器股份有限公司 Overvoltage protector
CN106680632A (en) * 2016-12-30 2017-05-17 杭州后博科技有限公司 Iron tower lightning protection performance detection method based on electromagnetic radiation abnormity determination and system
CN106680632B (en) * 2016-12-30 2021-01-08 杭州后博科技有限公司 Iron tower lightning protection performance detection method and system based on electromagnetic radiation abnormity judgment
CN107666138A (en) * 2017-09-29 2018-02-06 广东洲明节能科技有限公司 LED street lamp lightning protection device failure monitor system
CN107666138B (en) * 2017-09-29 2020-09-08 广东洲明节能科技有限公司 Failure monitoring system for LED street lamp lightning protection device

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C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20151125

Termination date: 20190522

CF01 Termination of patent right due to non-payment of annual fee