CN2431667Y - Multifunctional electric leakage circuit breaker - Google Patents
Multifunctional electric leakage circuit breaker Download PDFInfo
- Publication number
- CN2431667Y CN2431667Y CN 00218451 CN00218451U CN2431667Y CN 2431667 Y CN2431667 Y CN 2431667Y CN 00218451 CN00218451 CN 00218451 CN 00218451 U CN00218451 U CN 00218451U CN 2431667 Y CN2431667 Y CN 2431667Y
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- circuit breaker
- utility
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- electric leakage
- electric
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Abstract
The utility model discloses an electric leakage breaker with an electrical shock protection unit, mainly composed of a breaker. The utility model is characterized in that the breaker is connected with the electrical shock protection unit. The utility model has the advantages of artful design and reasonable structure. The utility model has reliable protect action for the person electric shock safety, prevents malfunction, conveniently restores to supply power owing to the automatic reclosing function, and enhances the transportation rate of protectors. The utility model has favorable application foreground in network construction and building site of countrywide urban and rural electric.
Description
The utility model relates to a kind of low-voltage electrical apparatus that is used for low-voltage distribution system, particularly relates to having the residual current circuit breaker of touching residual current protective unit.
Along with national economy increases rapidly, living standards of the people improve constantly, and power consumption grows with each passing day, and reliability and fail safe that low-pressure system is powered have proposed requirements at the higher level.In recent years, in civilian circuit, industrial and mineral and agriculture power supply circuits, it is more and more universal to use residual current circuit breaker.Its at the protection electric equipment, prevent that the line electrical leakage and the person from avoiding aspect such as shock hazard and playing an important role.But there is certain limitation in the use in existing residual current circuit breaker.Operation principle according to electric current action type earth leakage protective device; residual operating current comprises the shock current that flows through human body and the earth leakage current of circuit itself; the outmoded situation of the size of line-to-ground leakage current and the class of insulation of lead and degree of aging, equipment, factors such as the quantity of used electric equipment and air humidity have substantial connection.The plum rain season of the southern rainy season of China and the middle and lower reach of Yangtze River particularly, air humidity is very big, the insulation level of lead and equipment descends, China vast rural area supply line head, the class of insulation is lower, earth leakage current is all greater than 100 milliamperes, and above-mentioned sensitive-type earth leakage protective device also can move even without the human electric shock, influences normal power supply; If use the bigger residual current circuit breaker of rated residual operating current value, then under the environmental condition of dry weather, the leakage current of circuit and equipment is less, this moment is once there is the person to get an electric shock, have only the shock current of working as bigger by human body, when meeting or exceeding rated residual operating current, just can make the residual current circuit breaker action with the leakage current sum.This can bring very big danger to human body, even might cause death.
In addition, residual current circuit breaker does not possess the automatic reclosing function at present, and vast rural area low-voltage distributing line is longer, residual current circuit breaker is installed and is disperseed, and the rural area electricity-management personnel is less, after residual current circuit breaker trips, very inconvenient by electricity-management personnel's manual closing operation, require to have the automatic reclosing function.
The purpose of this utility model provides and a kind ofly can effectively overcome present residual current circuit breaker limitation in the use; can get an electric shock and electric leakage signal by automatic distinguishing; thereby can be used for the bigger earth leakage protective of line leak electric current; can be used for electrical shock protection again, and have the residual current circuit breaker of overload, short-circuit protection.
Another purpose of the present invention provides a kind of residual current circuit breaker with automatic reclosing function.
The technical solution of the utility model is, a kind of multifunctional electric leakage circuit breaker mainly is made up of a circuit breaker, and its characteristics are: circuit breaker also is connected with one and touches residual current protective unit.
Owing to adopt such scheme; be not difficult to draw as drawing a conclusion: the utility model is skillfully constructed; rational in infrastructure; both the person had been got an electric shock the reliable protection effect had been arranged safely; can prevent misoperation again, the automatic reclosing function conveniently restores electricity, and improves the operational percentage of protector; good prospects for application is arranged, the tool promotional value in occasions such as urban and urual areas of whole country's power grid construction and construction sites.
Below in conjunction with drawings and Examples the utility model is described in further detail.
Fig. 1 is the front view of the utility model during not with the automatic reclosing motor-operating mechanism;
Fig. 2 removes the later internal structure schematic diagram of part lid for the utility model;
Fig. 3 is a front view of the present utility model;
Fig. 4 is the left view of Fig. 3;
Fig. 5 is the utility model electric leakage electrical shock protection and automatic reclosing operation principle block diagram.
Referring to Fig. 1, Fig. 2; the first half of the present utility model is one four utmost point moulded case circuit breaker 1; have overload, short-circuit protection function; the neutral line extremely can be made as required and can not cut-off formula and maybe can cut-off formula; shunt release 5 is housed in the circuit breaker, and the push rod 19 in the shunt release 5 links to each other with the tripping mechanism 20 of circuit breaker.The latter half of the present utility model is electrical shock protection unit 3.Touch residual current protective unit and comprise at the bottom of the plastic casing 11; an electric sub-member plate 4 is equipped with in 11 bottom at the bottom of the plastic casing; a zero sequence current mutual inductor 9 is equipped with in the place ahead; three phase lines and three-dimensional arrangement of the neutral line are passed zero-sequence current current transformer 9; reliably insulate with the engineering plastics sleeve pipe each other; the two ends of four leads are tied joint cover 6 and 10 with screw 2; be fixed at the bottom of the plastic casing on 11 with screw 8; with screw 7 joint cover 6 and circuit breaker 1 are coupled together again; also realized to touch being connected of residual current protective unit 3 and circuit breaker 1; refill loam cake 14, cover leak(age) test button 12 and accessory power supply switch 13 are housed.
The utility model gets an electric shock, the operation principle of electric leakage automatic distinguishing function is such:
This residual current circuit breaker is used modern electronic technology; adopt regularly by comparing mode; to leak electricity in composite signal electric shock signal and electric leakage signal separated automatically; comparison amplifying circuit by separately amplifies; when reaching the circuit setting value; output control signal and pushing executing mechanism move, and reach the purpose of timely cut-out circuit protection personal safety.This residual current circuit breaker is mainly by circuit breaker 1, zero sequence current mutual inductor 9, electric sub-member plate 4, parts such as (comprising: amplifier, analog switch, comparator, gate circuit, integrating circuit, exclusive circuit and switching circuit etc.) shunt release 5 and automatic reclosing motor-operating mechanism 15 are formed, and its theory diagram as shown in Figure 5.
When the load-side of residual current circuit breaker produces electric leakage or shock current over the ground, the voltage signal that zero sequence current mutual inductor (LX) output is directly proportional with leakage current, this electric leakage composite signal is delivered to comparator (BJ1-BJ3) and comparison amplifier (A2) respectively after amplifier (A1) amplifies.It is a nonlinear jump signal that the electric shock of circuit and the separation principle of electric leakage signal are based on human electric shock's signal, and electric leakage signal then is an in addition differentiated treatment of this characteristic of AC sine signal of slowly changing of a kind of signal amplitude.By three phase comparators (BJ1-BJ3) of analog switching circuit (MK) control, the electric shock signal phase-splitting is detected relatively with the time interval of 20ms at the positive half cycle of every phase, and its result is deposited in the comparator, as the reference signal of next cycle.If current comparison signal and former save value be amplitude indifference when sudden change amount (promptly do not have non-linear) the equal no-output of each comparator relatively; But when having human electric shock's signal component in the electric leakage composite signal; current detection value and former save value in the sampling comparator have bigger variation; when variable quantity surpasses set point; one signal output (phase place on electric shock signal is decided) must be arranged in three comparators (BJ1-BJ3); and connect the coil of shunt release (FL) by comparison amplifier (A2), electronic switching circuit (DK1); inhale moving push rod 19; and promote breaker tripping mechanism 20 free tripping mechanism of residual current circuit breaker is moved rapidly, cut off the purpose that circuit is realized electrical shock protection.But slowly the line electrical leakage signal that changes needs only the set point that its rate of change is no more than comparator (BJ1-BJ3), and it is much no matter leakage current exceeds the shock current setting value, can not make the action of electrical shock protection loop.When the signal amplitude of amplifier (A1) output reaches certain value; when promptly reaching the electric leakage setting value of residual current circuit breaker; comparison amplifier (A2) output triggering signal makes the circuit breaker trip free by switching circuit equally, and excessive line electrical leakage is effectively protected.
The utility model can be at the automatic reclosing motor-operating mechanism 15 that touches dress band manual operation handle 16 on the protective circuit breaker Lou, and referring to Fig. 3, Fig. 4, electrically operated transmission mechanism 18 connects together with circuit breaker handle 17.
No matter this residual current circuit breaker is to get an electric shock or the electric leakage action, comparison amplifier (A2) all has signal output, control through integrating circuit (RC), electronic switching circuit (DK2) output one reclosing control wave, make motor-operating mechanism (DC) 15 actions, residual current circuit breaker is closed again, and circuit restores electricity.If when the residual current circuit breaker reclosing; the electric leakage of circuit or human electric shock's fault are not got rid of yet; comparison amplifier (A2) is output signal still; residual current circuit breaker is moved once more; the register output locking signal of latching circuit this moment (SD); electronic switching circuit (DK2) is in the lock state, and no reclosing signal is exported, thereby has guaranteed the security of operation of protected circuit.Touch covering of residual current protective unit leak(age) test button 12 is housed, accessory power supply switch 13 also is housed.
Claims (3)
1, a kind of multifunctional electric leakage circuit breaker mainly is made up of a circuit breaker, it is characterized in that: circuit breaker also is connected with one and touches residual current protective unit.
2, by the described a kind of multifunctional electric leakage circuit breaker of claim 1, it is characterized in that: in touching residual current protective unit and be at the bottom of the plastic casing electric sub-member plate is housed, a zero sequence current mutual inductor is equipped with in the place ahead.
3, by claim 1 or 2 described a kind of multifunctional electric leakage circuit breakers, it is characterized in that: the automatic reclosing motor-operating mechanism is housed on the circuit breaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00218451 CN2431667Y (en) | 2000-07-18 | 2000-07-18 | Multifunctional electric leakage circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00218451 CN2431667Y (en) | 2000-07-18 | 2000-07-18 | Multifunctional electric leakage circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2431667Y true CN2431667Y (en) | 2001-05-23 |
Family
ID=33583825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00218451 Expired - Fee Related CN2431667Y (en) | 2000-07-18 | 2000-07-18 | Multifunctional electric leakage circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2431667Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112865013A (en) * | 2020-03-30 | 2021-05-28 | 深圳友讯达科技股份有限公司 | Protection device based on residual current characteristic analysis |
-
2000
- 2000-07-18 CN CN 00218451 patent/CN2431667Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112865013A (en) * | 2020-03-30 | 2021-05-28 | 深圳友讯达科技股份有限公司 | Protection device based on residual current characteristic analysis |
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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 |