CN201773804U - Circuit breaker with selective protection function - Google Patents
Circuit breaker with selective protection function Download PDFInfo
- Publication number
- CN201773804U CN201773804U CN2010202658713U CN201020265871U CN201773804U CN 201773804 U CN201773804 U CN 201773804U CN 2010202658713 U CN2010202658713 U CN 2010202658713U CN 201020265871 U CN201020265871 U CN 201020265871U CN 201773804 U CN201773804 U CN 201773804U
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- Prior art keywords
- breakpoint
- incoming cables
- circuit breaker
- leading
- out terminal
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- Expired - Lifetime
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Abstract
The utility model relates to a circuit breaker with a selective protection function, comprising at least two groups of incoming line terminals and outgoing line terminals that are insulated to one another, wherein at least one breaking point and at least one tripper are arranged between one group of incoming line terminals and outgoing line terminals; and at least one breaking point is arranged between the other group of incoming line terminals and outgoing line terminals, an electromagnetic starting coil is arranged between the breaking point and the outgoing line terminal, and at least one breaking point, one thermal tripper and one resistor are arranged in parallel between the incoming line terminal and the electromagnetic starting coil. An operation mechanism consists of a handle and a tripping lever, wherein the handle is operated to control the closing and opening of the breaking points, thus realizing the connection and disconnection of the incoming line terminals and the outgoing line terminals; and the tripping lever is acted to realize the switching from closing to opening of the breaking points. The tripping lever can be acted by the tripper, the thermal tripper and a magnetic tripper so as to realize the closing of the breaking points. The circuit breaker can realize short circuit delaying function by means of a thermomagnetic mode, as well as reliable and practical protection function.
Description
Technical field
The utility model relates to the circuit breaker with selective protection, belongs to the low-voltage electrical apparatus field.
Background technology
In low-voltage distribution system, breaker of plastic casing is very important circuit protecting element.The quality of breaker of plastic casing defencive function directly has influence on the operational reliability and the stability of whole distribution system.Along with the application of electronic technology in breaker of plastic casing, make the defencive function of breaker of plastic casing realize short circuit short time delay function, thereby further realized the selective protection of distribution system, improved distribution system reliability of operation and stability greatly.But there is the manufacturing process complexity in electronic breaker, cost height, shortcomings such as electronic component failure.
Fuse I
2The difference of t Joule integral is obvious, and overload protection and short-circuit protection all realize that by merging fuse fusing time length is directly proportional and is inversely proportional to electric current with the cross section of fuse, so the fuse protection has good selectivity.But fuse also exists very important shortcoming, as the melt ageing phenomenon of no metallurgical effect, the melt ageing phenomenon of metallurgical effect is arranged, and is subjected to ambient temperature and humidity effect big, is installed and human factor influences greatly.
The utility model content
The purpose of this utility model is to propose a kind of circuit breaker with selective protection, and it can provide accurate, the reliable selective protection scheme that meets the fuse characteristic.
A kind of circuit breaker with selective protection, it comprises: the end of incoming cables of at least two group mutually insulateds and leading-out terminal, wherein serial connection first breakpoint and release between first group of end of incoming cables and the leading-out terminal, serial connection second breakpoint and drive the electromagnetic start coil of magnetic release, the alternate path that constitutes by the 3rd breakpoint, thermal overload release and resistance series connection in parallel between second group of end of incoming cables and electromagnetic start coil between second group of end of incoming cables and the leading-out terminal; Operating mechanism comprises handle, release lever, by operating described handle, and the closing, divide of the above-mentioned breakpoint of may command, thus realize the corresponding break-make of respectively organizing between end of incoming cables, the leading-out terminal, by acting on described release lever, can realize that above-mentioned breakpoint is by the transformation that is incorporated into branch; Described release, thermal overload release, magnetic release all can act on release lever, realize that breakpoint disconnects.
Further:
At least one arc control device is housed between described end of incoming cables and the breakpoint.
Described breakpoint is made up of fixed contact and moving contact, and moving contact is driven by operating mechanism and realizes closing a floodgate and separating brake.
Described operating mechanism comprises the rotating shaft that links to each other with the moving contact of described breakpoint, can organize at each an operating mechanism is set between end of incoming cables and the leading-out terminal, also can several groups of shared operating mechanisms.
Described electromagnetic start coil can drive second breakpoint and disconnect.
Can be connected in series a thermal overload release in described electromagnetic start coil front.
The structure of end of incoming cables and leading-out terminal can be same as any one group of structure in two groups of ends of incoming cables and the leading-out terminal more than three groups and three groups.
The utility model ground advantage is: overcome the cost height that uses electronic technology to realize the selective protection function and bring, complex process, problems such as electronic device inefficacy.Accurate, the reliable selective protection scheme that meets the fuse characteristic can be provided.And the utility model has used current limiting technique, has greatly improved the breaking capacity of circuit breaker.
Description of drawings
Fig. 1 is the electrical schematic diagram of the utility model scheme;
Fig. 2 is an axis side view of the present utility model;
Fig. 3 is a front view of the present utility model;
Fig. 4 is a cutaway view of the present utility model;
Fig. 5 is the axis side view of another embodiment of the utility model.
Embodiment
The utility model is a kind of circuit breaker with selective protection, it comprises: the end of incoming cables of at least two group mutually insulateds and leading-out terminal, wherein serial connection first breakpoint and release between first group of end of incoming cables and the leading-out terminal, serial connection second breakpoint and drive the electromagnetic start coil of magnetic release, the alternate path that constitutes by the 3rd breakpoint, thermal overload release and resistance series connection in parallel between second group of end of incoming cables and electromagnetic start coil between second group of end of incoming cables and the leading-out terminal; Operating mechanism comprises handle, release lever, by operating described handle, and the closing, divide of the above-mentioned breakpoint of may command, thus realize the corresponding break-make of respectively organizing between end of incoming cables, the leading-out terminal, by acting on described release lever, can realize that above-mentioned breakpoint is by the transformation that is incorporated into branch; Described release, thermal overload release, magnetic release all can act on release lever, realize that breakpoint disconnects.
Specify below in conjunction with accompanying drawing.
Ask for an interview Fig. 1.The end of incoming cables 1 and the leading-out terminal 6 that show two groups of mutually insulateds among the figure, wherein have one first breakpoint 2 and at least one release 7 between first group of end of incoming cables 1 and the leading-out terminal 6 at least, has one second breakpoint 2 at least between second group of end of incoming cables 1 and the leading-out terminal 6, an electromagnetic start coil 5 is arranged between second breakpoint 2 and leading-out terminal 6, in parallel by at least one breakpoint 2, a thermal overload release 3 and the alternate path that resistance 4 series connection constitute between end of incoming cables 1 and electromagnetic start coil 5.
Ask for an interview Fig. 2-Fig. 4.Operating mechanism 8 comprises handle 802, release lever 803, the closing, divide of operating grip 802 may command breakpoints 2, thus realize that end of incoming cables 1 to the break-make between the leading-out terminal 6, by acting on release lever 803, can realize that breakpoint 2 is by the transformation that is incorporated into branch.
Wherein, release 701, release 702, thermal overload release 3, all can act on release lever 803, realize that breakpoint 2 disconnects.
Breakpoint 2 is made up of fixed contact 21 and moving contact 202, and fixed contact 201 is connected with base 10, and moving contact 22 is driven by operating mechanism 8 and realizes closing a floodgate and separating brake.
Can be connected in series a thermal overload release 3 in electromagnetic start coil 5 fronts, realize having two types overcurrent protection between this group end of incoming cables 1 and the end of incoming cables 6.
This selective protective breaker course of work is as follows:
Electric current flow through at least two group ends of incoming cables 1 and leading-out terminal 6, when loop current reached the overload current threshold value, release 7 acted on operating mechanism 8 after time-delay a period of time, and each breakpoint 2 is all disconnected, played the protective feature of transshipping long delay; After having served as the disappearance of live stream, circuit breaker recovers normal operating conditions.
When short circuit current occurring in the loop, electromagnetic start coil 5 acts on corresponding moving contact 202, the second corresponding breakpoint 2 is disconnected, and other breakpoints 2 still remains on make position, so short circuit current is transformed on the parallel branch, i.e. flow through thermal overload release 3 and resistance 4 of electric current.Through after certain time-delay, thermal overload release 3 effect operating mechanisms 8 all disconnect each breakpoint 2; If short circuit current vanishes in the time-delay process is then closed again with corresponding second breakpoint of electromagnetic start coil, return to the normal power supply state.
Following description of contents function of the present utility model and structure realize situation.
The rotating shaft 801 of an operating mechanism 8 and insulation thereof is installed on a base 10, each breakpoint moving contact 202 is installed in rotating shaft 801, each breakpoint moving contact 202 can connect with the corresponding fixed contact 201 on being fixed in base 10 and disconnect.Base 10 can hold at least two group ends of incoming cables 1 and leading-out terminals 6, and wherein first group of end of incoming cables 1 and leading-out terminal are 6, comprise at least one group of release 7.6 of second group of end of incoming cables 1 and leading-out terminals, comprise electromagnetic start coil 5, as shown in Figure 4, moving unshakable in one's determination 503 of this electromagnetic start coil 5, fixed core 506 and permanent magnet 502 and the solenoid type coil 504 that is twining thereof, fixed and coat by the yoke 507 that a permeability magnetic material constitutes, when electromagnetic start coil 5 by short circuit current and when reaching short time delay starting current value, this electromagnetic start coil 5 can by solenoid type coil 504 around moving unshakable in one's determination 503, along insulating sleeve 508 centerline directions, and move after overcoming suction by the fixing permanent magnet 502 of insulating sleeve 508 end faces and insulating cover 501, permanent magnet 502 can guarantee moving unshakable in one's determination 503 initial position and influence the operating value of whole magnetic system.Moving unshakable in one's determination 503 through promoting the push rod 505 on its direction of motion after one section accelerated motion, promote lever 203 fixing on the corresponding moving contact by push rod 505 again, after lever 203 actions, makes moving contact 202 and fixed contact 201 open certain distance.As shown in Figure 2, be alternate path in the chamber on base 10 left sides, form fixed contact 201, moving contact 202, thermal overload release 3 and a resistance 4 that is connected in series by one on this path, after current conversion arrives this alternate path, resistance 4 makes circuital current be restricted to certain value, when electric current passes through thermal overload release 3, add thrermostatic bimetal-plate 301, according to I
2After the t anti-time limit characteristic was delayed time, adjustment screw 302 actuation gears on the bimetal leaf threaded off, circuit breaker tripping.Between between breakpoint 2 and the end of incoming cables 1, place arc control device 9 at least in addition, to improve arc quenching effect.
For the structure of end of incoming cables and leading-out terminal more than three groups and three groups, can be same as any one group of structure in two groups of ends of incoming cables and the leading-out terminal.
Claims (7)
1. circuit breaker with selective protection contains at its insulation shell:
Operating mechanism, it comprises handle, release lever, by operating described handle, the closing, divide of may command circuit breaker breakpoint, thereby realize the corresponding break-make of respectively organizing between end of incoming cables, the leading-out terminal,, can realize that above-mentioned breakpoint is by the transformation that is incorporated into branch by acting on described release lever;
Release, thermal overload release, magnetic release all can act on described release lever, realize that breakpoint disconnects;
It is characterized in that:
The end of incoming cables of at least two group mutually insulateds and leading-out terminal, wherein serial connection first breakpoint and release between first group of end of incoming cables and the leading-out terminal, serial connection second breakpoint and electromagnetic start coil between second group of end of incoming cables and the leading-out terminal, the alternate path that constitutes by the 3rd breakpoint, thermal overload release and resistance series connection in parallel between second group of end of incoming cables and electromagnetic start coil.
2. the circuit breaker with selective protection as claimed in claim 1 is characterized in that:
At least one arc control device is housed between described end of incoming cables and the breakpoint.
3. the circuit breaker with selective protection as claimed in claim 1 is characterized in that:
Described breakpoint is made up of fixed contact and moving contact, and moving contact is driven by operating mechanism and realizes closing a floodgate and separating brake.
4. the circuit breaker with selective protection as claimed in claim 3 is characterized in that:
Described operating mechanism comprises the rotating shaft that links to each other with the moving contact of described breakpoint, can organize at each an operating mechanism is set between end of incoming cables and the leading-out terminal, also can several groups of shared operating mechanisms.
5. the circuit breaker with selective protection as claimed in claim 1 is characterized in that:
Described electromagnetic start coil can drive second breakpoint and disconnect.
6. the circuit breaker with selective protection as claimed in claim 1 is characterized in that:
Can be connected in series a thermal overload release in described electromagnetic start coil front.
7. the circuit breaker with selective protection as claimed in claim 1 is characterized in that:
The structure of end of incoming cables and leading-out terminal can be same as any one group of structure in two groups of ends of incoming cables and the leading-out terminal more than three groups and three groups.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202658713U CN201773804U (en) | 2010-07-15 | 2010-07-15 | Circuit breaker with selective protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202658713U CN201773804U (en) | 2010-07-15 | 2010-07-15 | Circuit breaker with selective protection function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201773804U true CN201773804U (en) | 2011-03-23 |
Family
ID=43753647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202658713U Expired - Lifetime CN201773804U (en) | 2010-07-15 | 2010-07-15 | Circuit breaker with selective protection function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201773804U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102339696A (en) * | 2010-07-15 | 2012-02-01 | 北京翠祥电器元件有限公司 | Circuit breaker with selective protection |
| CN109149508A (en) * | 2018-05-25 | 2019-01-04 | 江苏凯隆电器有限公司 | A kind of circuit breaker internal redundancy protection architecture and its guard method |
-
2010
- 2010-07-15 CN CN2010202658713U patent/CN201773804U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102339696A (en) * | 2010-07-15 | 2012-02-01 | 北京翠祥电器元件有限公司 | Circuit breaker with selective protection |
| CN102339696B (en) * | 2010-07-15 | 2014-09-24 | 北京翠祥电器元件有限公司 | Circuit breaker with selective protection |
| CN109149508A (en) * | 2018-05-25 | 2019-01-04 | 江苏凯隆电器有限公司 | A kind of circuit breaker internal redundancy protection architecture and its guard method |
| CN109149508B (en) * | 2018-05-25 | 2024-03-12 | 江苏凯隆电器有限公司 | Circuit breaker internal redundancy protection structure and protection method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110323 |
|
| CX01 | Expiry of patent term |