CN2821981Y - Household leak breaker mounted with lightning protection anti-over voltage function - Google Patents
Household leak breaker mounted with lightning protection anti-over voltage function Download PDFInfo
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- CN2821981Y CN2821981Y CN 200520075915 CN200520075915U CN2821981Y CN 2821981 Y CN2821981 Y CN 2821981Y CN 200520075915 CN200520075915 CN 200520075915 CN 200520075915 U CN200520075915 U CN 200520075915U CN 2821981 Y CN2821981 Y CN 2821981Y
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- main switch
- sequence transformer
- current
- residual current
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Abstract
The utility model relates to a household residual current circuit breaker with the additional functions of lightning protection and anti-overvoltage, which comprises a residual current protection circuit, wherein the residual current protection circuit comprises a main switch (K1), a current-limiting resistor (R), a test switch (K2), a zero-sequence mutual inductor (L1), an electronic assembly plate (DZ) and a residual current trip (L2). The main switch (K1) is connected with power incoming lines and the zero-sequence mutual inductor (L1) which is connected to power outlet lines, a signal line of the zero-sequence mutual inductor (L1) is connected to the electronic assembly plate (DZ) which is connected with the residual current trip (L2) that is in mechanical connection with the main switch (K1), one end of the current-limiting resistor (R) is connected to a fire wire end (A) of the main switch (K1), the other end is connected with the test switch (K2) which is connected to a zero line end (D) at the back of the zero-sequence mutual inductor (L1), and an overvoltage detection circuit is connected between a zero line end (B) in the front of the main switch (K1) and a fire wire end (C) at the back of the zero-sequence mutual inductor (L1). The utility model has the advantages of low cost and reliable performance, and has the functions of lightning protection, anti-overvoltage and power protection on household appliances.
Description
Technical field:
The utility model relates to a kind of residual current circuit breaker, especially relates to a kind of family expenses residual current circuit breaker that compression functions was prevented in lightning protection that installs additional.Be applicable to rural households, household electrical appliance are carried out lightning protection, anti-overvoltage, earth leakage protective.Belong to technical field of electronic products.
Background technology:
Be frequent season of thunder and lightning summer, and after the thunder and lightning, always there is the electrical equipment of many families impaired, particularly the rural area has thunderbolt just to have large-scale electrical equipment impaired as long as often be each time.The form of thunder and lightning invasion electric equipment has two kinds: direct lightning strike and induction thunder.Thunder and lightning directly hit circuit and through electric equipment go into ground the thunderbolt overcurrent be called direct lightning strike; The powerful electromagnetic field that is produced by the lightning electric current changes the overvoltage that induces with conductor, and overcurrent forms the ground thunderbolt and is called the induction thunder.The induction thunder can be produced by electrostatic induction, also can be produced by electromagnetic induction, and the probability that forms induction lightening is very high.The power line in rural area all is erected at the field, is easy to be struck by lightning.Simultaneously,,, also the situation that 380V line voltage is registered one's residence occurs, make large-scale electrical equipment impaired through regular meeting owing to wrong line, zero line interrupt in the rural area.And special-purpose lightning protection and anti-overvoltage equipment generally can not be installed by rural households.Rural households mostly do not have special-purpose ground wire simultaneously, even there is minority family that ground wire is arranged, do not reach standard yet.But thunder and lightning also has one by as far as near process, before the intensity of thunder and lightning does not also reach the degree of injury household electrical appliance, cuts off the electricity supply.Just can protect household electrical appliance.
Before the utility model was made, general each family of rural area all was equipped with the family expenses earth leakage protective device, and its circuit diagram as shown in Figure 2.It is a kind of leakage protection circuit, by main switch K
1, current-limiting resistance R, test switch K
2, zero-sequence transformer L
1, electric sub-member plate DZ and leakage tripping device L
2Form.It only has simple creepage protection function, and does not have lightning protection, anti-over-voltage protecting function.For rural households, the rural households of poverty-stricken area particularly, best measure is reequiped existing family expenses residual current circuit breaker exactly.
Summary of the invention:
The purpose of this utility model overcomes above-mentioned deficiency; providing a kind of can carry out function at the existing family expenses earth leakage protective device of existing rural households and install additional; its family expenses residual current circuit breaker is removed had original creepage protection function, add the family expenses residual current circuit breaker that compression functions was prevented in lightning protection that installs additional of lightning protection and anti-overvoltage function and with low cost, dependable performance.
The purpose of this utility model is achieved in that a kind of family expenses residual current circuit breaker that compression functions was prevented in lightning protection that installs additional, comprises leakage protection circuit, and this leakage protection circuit comprises main switch K
1, current-limiting resistance R, test switch K
2, zero-sequence transformer L
1, electric sub-member plate DZ and leakage tripping device L
2, described main switch K
1One end links to each other with electric power incoming line, the other end and zero-sequence transformer L
1An end link to each other zero-sequence transformer L
1Another termination power outlet, zero-sequence transformer L
1Holding wire receive electric sub-member plate DZ, electric sub-member plate DZ and leakage tripping device L
2Link to each other control leakage tripping device L
2Action, leakage tripping device L
2With main switch K
1Be mechanical connection, as leakage tripping device L
2During action, drive main switch K
1Open circuit, one of described current-limiting resistance R terminates at main switch K
1Live wire end A, the other end and test switch K
2An end link to each other test switch K
2The other end and zero-sequence transformer L
1After zero line side D link to each other, when pressing test switch K
2The time, the simulation electric leakage takes place, and it is characterized in that: in described K switch
1Preceding zero line side B and zero-sequence transformer L
1After live wire end C between be connected with an over-voltage detection circuit.
The utility model installs the family expenses residual current circuit breaker that compression functions was prevented in lightning protection additional, and described over-voltage detection circuit is by piezo-resistance R
VWith current-limiting resistance R
2Series connection constitutes.
The utility model design is quite succinct.On existing family expenses earth leakage protective device basis, installed a piezo-resistance and a current-limiting resistance additional, need not existing family expenses residual current circuit breaker circuit is made any change.Simultaneously during this circuit working, need not to make property-line, can directly use in vast rural households.Its basic principle is: the family expenses residual current circuit breaker is connected on the house lead in place of power line, plays the earth leakage protective effect at ordinary times, as thunder and lightning or overtension; piezo-resistance conducting when surpassing set point; be equivalent to press the leak(age) test switch, make the residual current circuit breaker action, circuit disconnects.
In sum, the utlity model has following characteristics:
1, need not ground wire.Be applicable to the present situation of vast rural households.
2, with low cost.For existing family expenses residual current circuit breaker, only needing increases a piezo-resistance and a current-limiting resistance, and cost is extremely low, only needs to increase by 2～3 yuans, and procurement price in enormous quantities is lower, can not increase burden to rural households.
3, dependable performance.Existing family expenses residual current circuit breaker has been passed through the test of time, and dependable performance is stable.The element that newly installs additional is not changed original circuit, when piezo-resistance is moved, be equivalent to simulation electric leakage and take place, to original performance reliability without any influence.When protective circuit was moved, operate time＜0.1 of family expenses earth leakage protective device second can not cause damage to piezo-resistance and current-limiting resistance, thereby can use for a long time.
4, applied widely.Be applicable to vast rural households, household electrical appliance are carried out lightning protection, anti-overvoltage, earth leakage protective.Also can be used for not requiring automatic recovery, do not require the place that the high accuracy protection requires.
Description of drawings:
Fig. 1 installs the circuit diagram that the family expenses residual current circuit breaker of compression functions was prevented in lightning protection additional for the utility model.
Fig. 2 is the circuit diagram of this original family expenses residual current circuit breaker.
Embodiment:
Referring to Fig. 1, Fig. 1 installs the family expenses residual current circuit breaker that compression functions was prevented in lightning protection additional for the utility model.It mainly is made up of over-voltage detection circuit and leakage protection circuit.Leakage protection circuit is by main switch K
1, current-limiting resistance R, test switch K
2, zero-sequence transformer L
1, electric sub-member plate DZ and leakage tripping device L
2Constitute.Over-voltage detection circuit is by piezo-resistance R
VWith current-limiting resistance R
2Series connection constitutes.
Described main switch K
1One end links to each other with electric power incoming line, the other end and zero-sequence transformer L
1An end link to each other zero-sequence transformer L
1Another termination power outlet, zero-sequence transformer L
1Holding wire receive electric sub-member plate DZ, electric sub-member plate DZ and leakage tripping device L
2Link to each other leakage tripping device L
2With main switch K
1Be mechanical connection, one of described current-limiting resistance R terminates at main switch K
1Live wire end A, the other end and test switch K
2An end link to each other test switch K
2The other end and zero-sequence transformer L
1After zero line side D link to each other.The piezo-resistance R of described over-voltage detection circuit
VWith current-limiting resistance R
2Be connected main switch K after the series connection
1Preceding zero line side B and zero-sequence transformer L
1After live wire end C between.
The value of piezo-resistance: residential electricity consumption is phase voltage 220V, and its peak value is 220/0.707=311V; Line voltage is 380V, and its peak value is 380/0.707=537V.The voltage fluctuation of considering the rural area again is bigger, and piezo-resistance is got 400V (also can require to carry out value according to the difference protection).The value of current-limiting resistance; The operating current of family expenses earth leakage protective device is generally 30mA, and the utility model is got 100mA, and current-limiting resistance is got 400/0.1=4k Ω.
The 220V power supply at first passes through main switch K
1, pass through zero-sequence transformer L again
1Back output.Zero-sequence transformer L
1At first pass through main switch K
1, pass through zero-sequence transformer L again
1Back output.Zero-sequence transformer L
1Measure through zero-sequence transformer L
1The live wire electric current I
1With ground line current I
2Whether equate.Both equate under the normal condition, and electric sub-member plate DZ is failure to actuate.When electric leakage takes place,, cause I because one part of current constitutes the loop through the earth
1And I
2Unequal.At this moment, zero-sequence transformer L
1Send signal and give electric sub-member plate DZ, after electric sub-member plate DZ receives signal, control leakage tripping device L
2Action drives main switch K
1Open circuit.When pressing test switch K
2The time, on the current-limiting resistance R electric current I is arranged
3By, make I
1And I
2Unequal, the simulation electric leakage takes place, and being used to test the earth leakage protective device right and wrong can operate as normal.
When the power supply input is lower than set point, piezo-resistance R
VNot conducting is equivalent to open circuit.As thunder and lightning or overtension, piezo-resistance R when surpassing set point
VConducting has electric current I
4By.At this moment, I
1=I
2+ I
4, make I
1And I
2Unequal, be equivalent to leak electricity zero-sequence transformer L
1Send signal and give electric sub-member plate DZ, make leakage tripping device L
2Action drives main switch K
1Cut off circuit.Reach the purpose of protection domestic electric appliance.
Claims (2)
1, a kind ofly install the family expenses residual current circuit breaker that compression functions was prevented in lightning protection additional, comprise leakage protection circuit, this leakage protection circuit comprises main switch K
1, current-limiting resistance R, test switch K
2, zero-sequence transformer L
1, electric sub-member plate DZ and leakage tripping device L
2, described main switch K
1One end links to each other with electric power incoming line, the other end and zero-sequence transformer L
1An end link to each other zero-sequence transformer L
1Another termination power outlet, zero-sequence transformer L
1Holding wire receive electric sub-member plate DZ, electric sub-member plate DZ and leakage tripping device L
2Link to each other leakage tripping device L
2With main switch K
1Be mechanical connection, one of described current-limiting resistance R terminates at main switch K
1Live wire end A, the other end and test switch K
2An end link to each other test switch K
2The other end and zero-sequence transformer L
1After zero line side D link to each other, it is characterized in that: at described main switch K
1Preceding zero line side B and zero-sequence transformer L
1After live wire end C between be connected with an over-voltage detection circuit.
2, a kind of family expenses residual current circuit breaker that compression functions was prevented in lightning protection that installs additional according to claim 1, it is characterized in that: described over-voltage detection circuit is by piezo-resistance R
VWith current-limiting resistance R
2Series connection constitutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520075915 CN2821981Y (en) | 2005-09-27 | 2005-09-27 | Household leak breaker mounted with lightning protection anti-over voltage function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520075915 CN2821981Y (en) | 2005-09-27 | 2005-09-27 | Household leak breaker mounted with lightning protection anti-over voltage function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2821981Y true CN2821981Y (en) | 2006-09-27 |
Family
ID=37018532
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520075915 Expired - Fee Related CN2821981Y (en) | 2005-09-27 | 2005-09-27 | Household leak breaker mounted with lightning protection anti-over voltage function |
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| Country | Link |
|---|---|
| CN (1) | CN2821981Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102386608A (en) * | 2011-11-25 | 2012-03-21 | 佛山市佛电电器有限公司 | Intelligent lightning protection residual current circuit breaker |
| CN104392871A (en) * | 2014-11-14 | 2015-03-04 | 华南理工大学 | Residual-current circuit breaker with overvoltage protection function |
| CN105024340A (en) * | 2015-08-11 | 2015-11-04 | 国网浙江桐乡市供电公司 | Simple overvoltage protection trigger device |
| 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 |
-
2005
- 2005-09-27 CN CN 200520075915 patent/CN2821981Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102386608A (en) * | 2011-11-25 | 2012-03-21 | 佛山市佛电电器有限公司 | Intelligent lightning protection residual current circuit breaker |
| CN104392871A (en) * | 2014-11-14 | 2015-03-04 | 华南理工大学 | Residual-current circuit breaker with overvoltage protection function |
| 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 |
| CN105024340A (en) * | 2015-08-11 | 2015-11-04 | 国网浙江桐乡市供电公司 | Simple overvoltage protection trigger device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |