CN108963965A - A kind of short circuit of electric wiring and earth leakage protective device - Google Patents
A kind of short circuit of electric wiring and earth leakage protective device Download PDFInfo
- Publication number
- CN108963965A CN108963965A CN201810102099.4A CN201810102099A CN108963965A CN 108963965 A CN108963965 A CN 108963965A CN 201810102099 A CN201810102099 A CN 201810102099A CN 108963965 A CN108963965 A CN 108963965A
- Authority
- CN
- China
- Prior art keywords
- capacitor
- electric wiring
- leakage
- short circuit
- leading
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000001681 protective effect Effects 0.000 title claims abstract description 22
- 239000003990 capacitor Substances 0.000 claims abstract description 54
- 230000005611 electricity Effects 0.000 claims description 9
- 230000035945 sensitivity Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 230000004224 protection Effects 0.000 description 2
- 230000009979 protective mechanism Effects 0.000 description 2
- 206010037660 Pyrexia Diseases 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
- H02H3/325—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 involving voltage comparison
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
It include leakage circuit breakers QF, capacitor C1, capacitor C2, discharge coil L and electromagnetic switch K the present invention provides a kind of electric wiring short circuit and earth leakage protective device, circuit.Electric wiring short circuit of the invention and earth leakage protective device can be applicable in the line of alternating current 220V, be used as line short and to ground wire earth leakage protective.Circuit design of the invention is reasonable, high reliablity, and the element used is simple, and stability is good, high sensitivity.The present invention is applied in electric wiring, when short circuit or electric leakage occur for rear class electric wiring, the major accident caused by rear class electric wiring short circuit and due to electric leakage will be effectively prevented in the leakage circuit breakers tripping of internal trigger in 0.1 second inside it, thus rapid disconnecting circuit.
Description
Technical field
The present invention relates to a kind of electric protective device, specifically a kind of electric wiring short circuit and earth leakage protective device belong to
Low voltage electrical apparatus technology field.
Background technique
As the improvement of people's living standards, the electric appliance that family uses is more and more, electric power is also increasing, and very
The phenomenon that load that the mostly old original electric wiring of building can carry is smaller, is easy to appear circuit overload, fever and aging, into
And lead to the generation of short circuit or electric leakage accident.Short circuit refers to direct without electrical appliance between firewire and zero curve in power supply line
Connection when short circuit occurs for route, will lead to that circuital current is excessive and damage electric appliance, and the route of short circuit can also generate it is very big
Electric arc is easy to cause fire, causes immeasurable heavy losses.And when the insulating materials between firewire and electric appliance casing is because serious
It when aging, breakage cause directly to be connected to, will leak electricity, this electric leakage is abnormally dangerous, it is likely that jeopardizes the life of electric shock person.
It is used for short-circuit protection and earth leakage protective product, mainly breaker, earth leakage protective device or the two on the market at present
The leakage circuit breakers that function is combined into one, but these products are in use, is easy to appear that movement speed is excessively slow or movement is lost
The phenomenon of spirit, failure do not have due protective effect when occurring.When short circuit occurs for circuit, since short circuit current is very big, such as
Fruit disconnection movement of tripping is too slow, still can there is a phenomenon where electric appliances to burn, or even fire can be caused.In addition leakage circuit breakers will advise
Model uses, it is necessary to install independent ground wire, this is difficult to accomplish for the user in rural area, and rural subscribers often only have firewire
It registers one's residence with zero curve, if firewire leaks electricity to electric appliance casing, no ground wire, which will lead to leakage current, to be discharged, and earth leakage protective device is not
It can act, when contacting electric appliance casing electric shock accidents will occur for people.
Summary of the invention
To solve the above-mentioned problems, it the present invention provides a kind of electric wiring short circuit and earth leakage protective device, is applied
In electric wiring, when rear class electric wiring occur short circuit or electric leakage when, can within 0.1 second rapid disconnecting circuit, and
It is very easy to use without installing independent ground wire.
The technical solution adopted in the present invention is as follows:
A kind of electric wiring is short-circuit and earth leakage protective device, circuit include leakage circuit breakers QF, capacitor C1, capacitor C2, electric discharge
Coil L and electromagnetic switch K, wherein leakage circuit breakers QF use second level TW two wire leakage circuit breakers, the two of leakage circuit breakers QF
A end of incoming cables is connected with the firewire L of electric wiring with zero curve N respectively, and the firewire leading-out terminal of leakage circuit breakers QF is with capacitor C1's
One end, one end of discharge coil L, one end of the coil of electromagnetic switch K, electromagnetic switch K normally opened contact K1 one end it is total
With connection, the other end of the coil of the other end and electromagnetic switch K of the other end connection discharge coil L of capacitor C1, electric leakage is disconnected
The zero curve end of incoming cables of road device QF is also connected with one end of capacitor C2, the normally opened contact of the other end connection electromagnetic switch K of capacitor C2
The other end of K1；The other end of capacitor C1 is drawn outward as firewire L1 leading-out terminal, the zero curve leading-out terminal of leakage circuit breakers QF to
Outer draw is used as zero curve N1 leading-out terminal, and the other end of capacitor C2 is drawn outward as ground wire leading-out terminal, by firewire L1 leading-out terminal, zero
Line N1 leading-out terminal and ground wire leading-out terminal composition single-phase three wire system route are powered to the successive load of electric wiring.
The operation principle of the present invention is that: after the present apparatus is accessed in electric wiring, when following stage circuit is normal, due to electricity
Hold C1 alternating current is connected, the both ends capacitor C1 do not have voltage difference, therefore do not influence to power to rear class；When late-class circuit firewire with
When short circuit occurs for zero curve, firewire L1 leading-out terminal instantaneous variation is zero potential, thus generates a voltage difference at the both ends of capacitor C1,
Obtain the coil of electromagnetic switch K electric, the normally opened contact K1 closure of electromagnetic switch K, the electric current of firewire is flowed to through capacitor C2 to be leaked
The zero curve end of incoming cables of electrical circuit breakers QF keeps two line current of leakage circuit breakers QF uneven, and then triggers earth leakage protective mechanism action,
The power-off of leakage circuit breakers QF immediate trip, thus protects rear class electric wiring；When the firewire of late-class circuit leaks electricity to electric appliance casing
When, leakage current can flow to the zero curve end of incoming cables of leakage circuit breakers QF through ground wire and capacitor C2, make two line current of leakage circuit breakers QF
Imbalance, and then earth leakage protective mechanism action is triggered, thus rear class electric wire is protected in the power-off of leakage circuit breakers QF immediate trip
Road.
Electric wiring short circuit of the invention and earth leakage protective device can be applicable in the line of alternating current 220V, as line
Short out road and ground wire earth leakage protective is used.Circuit design of the invention is reasonable, high reliablity, and the element used is simple, stablizes
Good, the high sensitivity of property.It, all can be when short circuit or electric leakage occur for rear class electric wiring the present invention is applied in electric wiring
Its internal leakage circuit breakers tripping of internal trigger in 0.1 second, so that rapid disconnecting circuit, effectively prevents because of rear class electric wiring
Short circuit and electric leakage and caused by major accident.
Detailed description of the invention
Fig. 1 is the circuit diagram of the short circuit of this electric wiring and earth leakage protective device.
Fig. 2 be Fig. 1 in capacitor C1 using two concatenated capacitor C11, C12 substituted after circuit diagram.
Fig. 3 be Fig. 1 in capacitor C1 using two capacitor C13, C14 in parallel substituted after circuit diagram.
Specific embodiment
The present invention will be further described with reference to the accompanying drawing.
As shown in Figure 1, this electric wiring short circuit and earth leakage protective device circuit include leakage circuit breakers QF, capacitor C1,
Capacitor C2, discharge coil L and electromagnetic switch K, wherein leakage circuit breakers QF uses second level TW two wire leakage circuit breakers, and electric leakage is disconnected
Two ends of incoming cables of road device QF are connected with the firewire L of electric wiring with zero curve N respectively, the firewire leading-out terminal of leakage circuit breakers QF
With one end of capacitor C1, one end of discharge coil L, one end of the coil of electromagnetic switch K, electromagnetic switch K normally opened contact
One end of K1 connects jointly, the coil of the other end and electromagnetic switch K of the other end of capacitor C1 connection discharge coil L it is another
End, the zero curve end of incoming cables of leakage circuit breakers QF are also connected with one end of capacitor C2, the other end connection electromagnetic switch K's of capacitor C2
The other end of normally opened contact K1；The other end of capacitor C1 is drawn outward as firewire L1 leading-out terminal, the zero curve of leakage circuit breakers QF
Leading-out terminal is drawn outward as zero curve N1 leading-out terminal, and the other end of capacitor C2 is drawn outward as ground wire leading-out terminal, by firewire L1
Leading-out terminal, zero curve N1 leading-out terminal and ground wire leading-out terminal composition single-phase three wire system route are supplied to the successive load of electric wiring
Electricity.
The capacitor C1 is greater than 300V using ac voltage withstanding value, and capacity is greater than the polarity free capacitor of 50 μ F；Capacitor C2 is used
Ac voltage withstanding value is greater than 300v, polarity free capacitor of the capacity less than 50 μ F；The capacitor C1 can use two concatenated capacitors
C11, C12 are substituted, to reduce the pressure voltage for selecting capacitor, as shown in Figure 2；The capacitor C1 can also use two parallel connections
Capacitor C13, C14 substituted, with reduce select capacitor capacity, as shown in Figure 3.
The discharge coil L can be substituted using reactor.It is disconnected in leakage circuit breakers QF in the circuit of the present apparatus
The moment of electricity, the both ends of capacitor C1 have certain electricity, and discharge coil L or reactor can quickly bleed off the electricity of capacitor C1
Amount.
The electromagnetic relay of the models such as JTX-2C can be used in the electromagnetic switch K.
Above-mentioned legend is only exemplary embodiments of the invention, is not intended to restrict the invention, it is all in spirit of the invention and
Made any modification or equivalent replacement and improvement etc., should all be included in the protection scope of the present invention within principle.
Claims (5)
1. a kind of short circuit of electric wiring and earth leakage protective device, it is characterized in that: the circuit of described device include leakage circuit breakers QF,
Capacitor C1, capacitor C2, discharge coil L and electromagnetic switch K, wherein leakage circuit breakers QF uses second level TW two wire leakage, breaking
Two ends of incoming cables of device, leakage circuit breakers QF are connected with the firewire L of electric wiring with zero curve N respectively, leakage circuit breakers QF's
Firewire leading-out terminal and one end of capacitor C1, one end of discharge coil L, one end of the coil of electromagnetic switch K, electromagnetic switch K
One end of normally opened contact K1 connect jointly, the other end of the other end connection discharge coil L of capacitor C1 and electromagnetic switch K's
The other end of coil, the zero curve end of incoming cables of leakage circuit breakers QF are also connected with one end of capacitor C2, and the other end of capacitor C2 connects electricity
The other end of the normally opened contact K1 of magnetic-type switch K；The other end of capacitor C1 is drawn outward as firewire L1 leading-out terminal, leakage, breaking
The zero curve leading-out terminal of device QF is drawn outward as zero curve N1 leading-out terminal, and the other end of capacitor C2 is drawn outward as ground wire outlet
End, forms rear class of the single-phase three wire system route to electric wiring from firewire L1 leading-out terminal, zero curve N1 leading-out terminal and ground wire leading-out terminal
Load is powered.
2. electric wiring short circuit according to claim 1 and earth leakage protective device, it is characterized in that: the capacitor C1 is using friendship
It flows pressure voltage and is greater than 300V, capacity is greater than the polarity free capacitor of 50 μ F；Capacitor C2 is greater than 300v using ac voltage withstanding value, and capacity is small
In the polarity free capacitor of 50 μ F.
3. electric wiring short circuit according to claim 1 and earth leakage protective device, it is characterized in that: the capacitor C1 uses two
A concatenated capacitor C11, C12 are substituted.
4. electric wiring short circuit according to claim 1 and earth leakage protective device, it is characterized in that: the capacitor C1 uses two
Capacitor C13, C14 of a parallel connection are substituted.
5. electric wiring short circuit according to claim 1-4 and earth leakage protective device, it is characterized in that: the electric discharge
Coil L is substituted using reactor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810102099.4A CN108963965A (en) | 2018-02-01 | 2018-02-01 | A kind of short circuit of electric wiring and earth leakage protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810102099.4A CN108963965A (en) | 2018-02-01 | 2018-02-01 | A kind of short circuit of electric wiring and earth leakage protective device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108963965A true CN108963965A (en) | 2018-12-07 |
Family
ID=64495460
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810102099.4A Pending CN108963965A (en) | 2018-02-01 | 2018-02-01 | A kind of short circuit of electric wiring and earth leakage protective device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108963965A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1175576A (en) * | 1967-03-29 | 1969-12-23 | Ass Elect Ind | Improvements in and relating to Coupling Means for Interconnecting Alternating Current Networks |
| US20100117458A1 (en) * | 2007-02-16 | 2010-05-13 | Franz Reithmayer | Electronic security for a power supply |
| CN101976815A (en) * | 2010-09-29 | 2011-02-16 | 厦门振泰成科技有限公司 | Loaded multifunctional protection circuit |
| US20120293902A1 (en) * | 2011-05-17 | 2012-11-22 | Hon Hai Precision Industry Co., Ltd. | Over-current protection circuit and electronic device with the same |
| US20140300345A1 (en) * | 2011-12-26 | 2014-10-09 | Zhenyang Liu | Intelligent magnetic latching miniature circuit breaker |
| CN208015351U (en) * | 2018-02-01 | 2018-10-26 | 韦荣贵 | A kind of short circuit of electric wiring and earth leakage protective device |
-
2018
- 2018-02-01 CN CN201810102099.4A patent/CN108963965A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1175576A (en) * | 1967-03-29 | 1969-12-23 | Ass Elect Ind | Improvements in and relating to Coupling Means for Interconnecting Alternating Current Networks |
| US20100117458A1 (en) * | 2007-02-16 | 2010-05-13 | Franz Reithmayer | Electronic security for a power supply |
| CN101976815A (en) * | 2010-09-29 | 2011-02-16 | 厦门振泰成科技有限公司 | Loaded multifunctional protection circuit |
| US20120293902A1 (en) * | 2011-05-17 | 2012-11-22 | Hon Hai Precision Industry Co., Ltd. | Over-current protection circuit and electronic device with the same |
| US20140300345A1 (en) * | 2011-12-26 | 2014-10-09 | Zhenyang Liu | Intelligent magnetic latching miniature circuit breaker |
| CN208015351U (en) * | 2018-02-01 | 2018-10-26 | 韦荣贵 | A kind of short circuit of electric wiring and earth leakage protective device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203589720U (en) | LED optical engine lightning protection apparatus | |
| CN102891471A (en) | Three-phase circuit breaker having zero offset, zero/fire wire reverse connection and fire wire disconnection protection functions | |
| CN101976815B (en) | Loaded multifunctional protection circuit | |
| CN203562774U (en) | Alternating-current lightning protection module for LED lighting equipment | |
| CN200976482Y (en) | Leakage detection protective circuit | |
| CN208015351U (en) | A kind of short circuit of electric wiring and earth leakage protective device | |
| CN104377647B (en) | leakage protection circuit | |
| CN204205560U (en) | leakage protection circuit | |
| CN202127172U (en) | Transformer coil-out circuit of electric furnace | |
| CN201149988Y (en) | Overvoltage protector for cutting low-voltage electric network zero curve | |
| CN208352961U (en) | A kind of comprehensive protective circuit breaker | |
| CN108963965A (en) | A kind of short circuit of electric wiring and earth leakage protective device | |
| CN102255277A (en) | Leakage detection protection circuit | |
| CN101179169A (en) | Refrigerator with creepage protection function | |
| CN101877476A (en) | Protector for preventing three-phase power circuit from generating high voltage | |
| CN207166129U (en) | A kind of protection device of power line | |
| CN208508516U (en) | A kind of AC power source surge protective device and electronic equipment | |
| CN107394768B (en) | Overcurrent sectional type voltage protector protection circuit for vacuum circuit breaker | |
| CN202872329U (en) | Circuit breaker with overvoltage protection function | |
| CN207282396U (en) | A kind of breaker of high-tension switch gear | |
| CN201290000Y (en) | Full-automatic intelligent lightning protection ultra-undervoltage protector | |
| CN206099289U (en) | Four -pole circuit breaker | |
| CN204631177U (en) | A kind of single phase low voltage distribution system Fault Pre pick-up unit | |
| CN209233459U (en) | A kind of Current Transformer Secondary over-voltage protector | |
| CN204287383U (en) | A kind of overload, short circuit indicating circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |