CN207134318U - Plastic shell miniature circuit breaker - Google Patents
Plastic shell miniature circuit breaker Download PDFInfo
- Publication number
- CN207134318U CN207134318U CN201721104019.6U CN201721104019U CN207134318U CN 207134318 U CN207134318 U CN 207134318U CN 201721104019 U CN201721104019 U CN 201721104019U CN 207134318 U CN207134318 U CN 207134318U
- Authority
- CN
- China
- Prior art keywords
- contact
- circuit breaker
- arc
- magnetictrip
- miniature circuit
- 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.)
- Expired - Fee Related
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- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The utility model discloses a kind of plastic shell miniature circuit breaker; including plastic casing; with contact system, arc quenching system, short current protective mechanism and the overload protecting mechanism being arranged on plastic casing; the bimetal leaf that overload protecting mechanism is; bimetal leaf is bonded by the double layer of metal of different heat expansion coefficient; the high metal of thermal coefficient of expansion is active layers; the low metal of thermal coefficient of expansion is passive layer; short current protective mechanism is magnetictrip, and bimetal leaf one end is fixed on magnetictrip bottom surface vertically.The beneficial effects of the utility model are; moulded case circuit breaker plays under normal circumstances herein, makees infrequently splitting or integrating circuit or starting, stops motor, when the failures such as overload, short circuit or under-voltage undertension occur for circuit or motor; energy automatic shutdown circuit, the effect protected.
Description
Technical field
The utility model belongs to power distribution equipment technical field, is related to a kind of plastic shell miniature circuit breaker.
Background technology
In the modern times, industry, agricultural, transportation, national defence, culture and education, business, tourist industry and people's lives all from
Electric energy is not opened, and the production of electric energy, conveying and use need to use different voltage.In general, electric energy production and conveying adopt
With high voltage, and the use of electric energy can only just use low-voltage, and low pressure is signified for 1200 volts of exchange herein, below 1500 volts of direct current
Voltage.Therefore low-voltage electrical apparatus undertakes the important task of its protection.In the occasion that installation category is II, III, electricity consumption can occur often and set
Standby overload, it is sometimes even short-circuit.
Expand for accident prevention and jeopardize whole electrical power trans mission/distribution system, it is desirable to which breaker at this can reliably and securely disengagement failure
Electric current, and plastic shell-type breaker plays under normal circumstances herein, make infrequently splitting or integrating circuit or starting, stop it is electronic
Machine, when it is the failures such as undertension that overload, short circuit or under-voltage, which occur, for circuit or motor, energy automatic shutdown circuit, give
The effect of protection.
Utility model content
The purpose of this utility model is to provide a kind of plastic shell miniature circuit breaker, solves circuit in the prior art or electronic
Can not open circuit protection problem during the failures such as machine generation overload, short circuit or under-voltage undertension.
The utility model is the technical scheme adopted is that plastic shell miniature circuit breaker, including plastic casing, and is arranged on modeling
Contact system, arc quenching system, short current protective mechanism and overload protecting mechanism on material shell body, the bimetallic that overload protecting mechanism is
Piece, bimetal leaf are bonded by the double layer of metal of different heat expansion coefficient, and the high metal of thermal coefficient of expansion is active layers, and heat is swollen
The low metal of swollen coefficient is passive layer, and short current protective mechanism is magnetictrip, and bimetal leaf one end is fixed on electromagnetism and taken off vertically
Detain on device bottom surface；
Arc system includes being arranged on the arc extinguishing grid pieces and red steel cardboard below plastic casing, and arc extinguishing grid pieces are to be sequentially fixed at
It is multiple between the red steel cardboard of both sides；
Contact system includes the moving contact and static contact for being arranged on plastic casing side, and moving contact is hook solid and one end is set
It is equipped with movable contact, the external magnetictrip of the moving contact other end, the divide-shut brake of moving contact is realized by magnetictrip；
Static contact is tabular and one end is provided with stationary contact, and stationary contact contacts when closing a floodgate with movable contact, static contact one
End be connected with it is horizontal lead arc plate, lead arc plate end and extend to being connected with the arc extinguishing grid pieces bottom of arc quenching system, make arc quenching system,
Plastic casing and contact system form the closed air chamber for being available for moving contact to move.
The characteristics of the utility model, also resides in,
There is space between static contact and moving contact.
It is the shape of falling V at the top of arc extinguishing grid pieces, arc extinguishing grid pieces grid number is 9.
One layer of resistive layer is accompanied between active layers and passive layer.
Magnetictrip includes screwed pipe direct drive type electro magnet.
The beneficial effects of the utility model are that moulded case circuit breaker plays under normal circumstances herein, makees infrequently
Splitting or integrating circuit or starting, stop motor, the failures such as overload, short circuit or under-voltage undertension occur in circuit or motor
When, energy automatic shutdown circuit, the effect protected.
Brief description of the drawings
Fig. 1 is the assembling structure schematic diagram of the utility model plastic shell miniature circuit breaker；
Fig. 2 is the contact system structure schematic diagram of the utility model plastic shell miniature circuit breaker；
Fig. 3 is short current protective mechanism and the overload protecting mechanism structural representation of the utility model plastic shell miniature circuit breaker
Figure；
Fig. 4 is the arc quenching system structural representation of the utility model plastic shell miniature circuit breaker；
Fig. 5 is the arc chute chip architecture schematic diagram of the utility model plastic shell miniature circuit breaker；
Fig. 6 is the structural representation of the utility model plastic shell miniature circuit breaker；
Fig. 7 is the heated schematic diagram of the bimetal leaf of the utility model plastic shell miniature circuit breaker.
In figure, 1. plastic casings, 2. static contacts, 3. moving contacts, 4. magnetictrips, 5. active layers, 6. bimetal leafs, 7.
Arc extinguishing grid pieces, 8. lead arc plate, 9. red steel cardboards, 10. passive layers.
Embodiment
The utility model is described in detail with reference to the accompanying drawings and detailed description.
Plastic shell miniature circuit breaker of the present utility model, structure is as shown in Fig. 1-Fig. 7, including plastic casing 1, and is arranged on
Contact system, arc quenching system, short current protective mechanism and overload protecting mechanism on plastic casing 1, overload protecting mechanism are double
Sheet metal 6, bimetal leaf 6 are bonded by the double layer of metal of different heat expansion coefficient, and the high metal of thermal coefficient of expansion is actively
Layer 5, the low metal of thermal coefficient of expansion is passive layer 10, and short current protective mechanism is magnetictrip 4, and the one end of bimetal leaf 6 is vertical
It is fixed on the bottom surface of magnetictrip 4；
Arc quenching system includes the arc extinguishing grid pieces 7 and red steel cardboard 9 for being arranged on the lower section of plastic casing 1, and arc extinguishing grid pieces 7 is successively
It is fixed on multiple between the red steel cardboard 9 of both sides；
Contact system includes the moving contact 3 and static contact 2 for being arranged on the side of plastic casing 1, and moving contact 3 is hook solid and one
End is provided with movable contact, the external magnetictrip 4 of the other end of moving contact 3, the division of moving contact 3 is realized by magnetictrip 4
Lock；
Static contact 2 is tabular and one end is provided with stationary contact, and stationary contact contacts when closing a floodgate with movable contact, static contact 2
The other end be connected with it is horizontal lead arc plate 8, lead the end of arc plate 8 and extend to being connected with the bottom of the arc extinguishing grid pieces of arc quenching system 7, make to go out
Arc system, plastic casing 1 and contact system form the closed air chamber for being available for moving contact 3 to move.
There is space between static contact 2 and moving contact 3.
The top of arc extinguishing grid pieces 7 is the shape of falling V, and the grid number of arc extinguishing grid pieces 7 is 9.
One layer of resistive layer is accompanied between active layers 5 and passive layer 10.
Magnetictrip 4 includes screwed pipe direct drive type electro magnet.
Plastic shell miniature circuit breaker of the present utility model, the contact system of breaker uses clapper-type structure, in static contact 2
Place, which has installed additional, leads arc plate 8 to increase arc extinguishing ability, and leads arc plate 8 and stretch into the bottom of arc extinguishing grid pieces 7, arc extinguishing grid pieces 7 and contact system
Contact, because arc-chute 7 is heavier, in order to ensure that the center of gravity of breaker is placed on the lower section of the plastic casing 1 of breaker.
Bimetal leaf 6 contacts with the wink motor magnet of magnetictrip 4, and bimetal leaf 6 uses heating one end, wink motor magnet use spiral shell
Pipe direct dynamic structure, both are threaded off by dropout piece.
When circuit occurs short-circuit, excessive electric current causes the electromagnet in magnetictrip 4 to produce sufficiently large suction
Gravitation, to overcome reaction spring adhesive armature strike draw bar so as to lead agency action cut-out circuit.Moving contact 3, static contact 2
Disconnected under certain short circuit current, there is certain gap between both contacts, electric arc can elongated and drawn and attenuated, in one side arc gap
Voltage begun to ramp up from blowout voltage, return to supply voltage；On the other hand in current over-zero, arc gap has certain medium
Intensity, and constantly rise with free degree, the rapid dielectric strength for recovering medium.
When circuit overloads, freely the extending for active layers 5 when heated of double-metal layer 6 is more than passive layer 10, actively
Layer 5 is pind down when freely extending by passive layer 10, by the limitation of active layers 5 when passive layer 10 freely extends.Due to actively
The elongation of layer 5 extends more than passive layer 10 so that and active layers 5 produce outside stress, and passive layer 10 produces inside tension,
Two power form a torque, bimetal leaf 6 is produced bending.Using lever principle, bimetal leaf 6 is touched by the bending of upper end
It is dynamic to be threaded off, so that main contacts disconnects.
For breaker due to capacity and small volume, rated operational current is small, in addition in view of the factor of economic aspect, uses
The strength of materials, hardness are preferable, can reduce abrasion, resistance fusion welding can be only second to silver-colored graphite, and galvano-cautery rate is relatively low, is widely used in low
The AgCdO of compression moulding case circuit breaker12Do contact.Contact system due to using clapper-type form, therefore have to space it is certain will
Ask, arc plate 8 is led to increase arc extinguishing ability in addition, having been installed additional at static contact.
Using metal grid as arc extinguishing grid pieces 7, arc extinguishing grid pieces 7 are fixed between two framves of red steel cardboard 8 arc quenching system.Go out
Arc grid 7 is grid body portion, and plastic casing 1 is only the locular wall of arc-chutes, and pressure caused by electric arc and suction are born by it
Receive the heat of electric arc.For the top design of arc extinguishing grid pieces 7 into inverted V-shaped, it is that electric arc enters fashionable to reduce resistance that it, which is acted on,.Arc extinguishing grid pieces
7 take 9, are followed by a piece of leading arc plate 8 to the bottom of arc extinguishing grid pieces 7 to strengthen arc extinction performance in static contact 2.Arc extinguishing grid pieces 7 use 10
Number steel plate, steel plate external galvanized layer antirust, being installed on red steel cardboard 9 turns into arc extinguishing grid pieces, although the heat resistance of red steel cardboard 9 and
Quality is all poor, but red steel cardboard 9 can discharge a kind of gas under high temperature sintering, so as to produce gas-blast, is advantageous to
The extinguishing of electric arc.
Bimetal leaf 6 is the combined material firmly combined by the double layer of metal of different heat expansion coefficient, thermal expansion
High one layer of coefficient is active layers 5, and relatively low one layer of thermal coefficient of expansion is passive layer 10.Bimetal leaf 6 can with directly heating or
The method of indirectly heat obtains the thermal source for being allowed to deform.Freely extending for active layers 5 is more than passive layer 10 when heated, but actively
Layer 5 is pind down by passive layer 10 when freely extending, and by the limitation of active layers 5 when passive layer 10 freely extends.Due to master
The elongation of dynamic layer 5 extends more than passive layer 10, and active layers 5 produce outside stress when it is heated, and passive layer 10 produces inside
Tension, two power form a torque, bimetal leaf 6 is produced bending.
The main composition of magnetictrip 4 is electromagnet, according to breaker allow volume, set breaker iron core and
Armature etc..The electromagnet for making instantaneous protection is a kind of short time duty, is failure to actuate when the fault current of certain multiple does not occur.
When reaching setting valve electric current, electromagnet can act in less than 0.2S.Due to for alternating current, coil is stretched into using dynamic iron core
Inner chamber produces additional screwed pipe power to obtain the pull characteristics of needs, and the working time is very short, and it is also without setting divided magnetic ring
That is short-circuited conducting sleeve.
Bimetal leaf 6 and magnetictrip 4 are apart from relatively closer, and because bimetal leaf 6 is using heating one end
Form, and magnetictrip 4 wink motor magnet using the form of screwed pipe direct acting, therefore can pass through same dropout into both
Piece is threaded off, and using lever principle, bimetal leaf 6 is touched by the bending of upper end, and the direct acting that electromagnet passes through lower section
To touch.
Claims (5)
1. plastic shell miniature circuit breaker, it is characterised in that including plastic casing (1), and the contact being arranged on plastic casing (1)
System, arc quenching system, short current protective mechanism and overload protecting mechanism, the bimetal leaf (6) that the overload protecting mechanism is are described
Bimetal leaf (6) is bonded by the double layer of metal of different heat expansion coefficient, and the high metal of the thermal coefficient of expansion is active layers
(5), the low metal of the thermal coefficient of expansion is passive layer (10), and the short current protective mechanism is magnetictrip (4), described double
Sheet metal (6) one end is fixed on magnetictrip (4) bottom surface vertically；The arc quenching system includes being arranged on plastic casing (1)
The arc extinguishing grid pieces (7) and red steel cardboard (9) of lower section, the arc extinguishing grid pieces (7) be sequentially fixed at both sides red steel cardboard (9) it
Between it is multiple；The contact system includes the moving contact (3) and static contact (2) for being arranged on plastic casing (1) side, described dynamic tactile
Head (3) is hook solid and one end is provided with movable contact, the external magnetictrip of moving contact (3) other end (4), passes through electromagnetism
Electrical apparatus release (4) realizes the divide-shut brake of moving contact (3)；The static contact (2) is tabular and one end is provided with stationary contact, described quiet
Contact contacts with movable contact when closing a floodgate, static contact (2) other end be connected with it is horizontal lead arc plate (8), it is described to lead arc plate
(8) end extends to is connected with the arc extinguishing grid pieces of arc quenching system (7) bottom, makes arc quenching system, plastic casing (1) and contact system
Formation is available for the closed air chamber that moving contact (3) moves.
2. plastic shell miniature circuit breaker according to claim 1, it is characterised in that the static contact (2) and moving contact (3)
Between there is space.
3. plastic shell miniature circuit breaker according to claim 1, it is characterised in that be V at the top of the arc extinguishing grid pieces (7)
Shape, arc extinguishing grid pieces (7) the grid number are 9.
4. plastic shell miniature circuit breaker according to claim 1, it is characterised in that the active layers (5) and passive layer
(10) one layer of resistive layer is accompanied between.
5. plastic shell miniature circuit breaker according to claim 1, it is characterised in that the magnetictrip (4) includes spiral shell
Pipe direct drive type electro magnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721104019.6U CN207134318U (en) | 2017-08-31 | 2017-08-31 | Plastic shell miniature circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721104019.6U CN207134318U (en) | 2017-08-31 | 2017-08-31 | Plastic shell miniature circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207134318U true CN207134318U (en) | 2018-03-23 |
Family
ID=61637072
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721104019.6U Expired - Fee Related CN207134318U (en) | 2017-08-31 | 2017-08-31 | Plastic shell miniature circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207134318U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112151303A (en) * | 2020-09-15 | 2020-12-29 | 南京点坊点电子商务有限公司 | Intelligent manufacturing circuit breaker capable of realizing pre-sensing |
-
2017
- 2017-08-31 CN CN201721104019.6U patent/CN207134318U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112151303A (en) * | 2020-09-15 | 2020-12-29 | 南京点坊点电子商务有限公司 | Intelligent manufacturing circuit breaker capable of realizing pre-sensing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180323 Termination date: 20180831 |