CN203456404U - Direct-current circuit breaker - Google Patents
Direct-current circuit breaker Download PDFInfo
- Publication number
- CN203456404U CN203456404U CN201320529276.XU CN201320529276U CN203456404U CN 203456404 U CN203456404 U CN 203456404U CN 201320529276 U CN201320529276 U CN 201320529276U CN 203456404 U CN203456404 U CN 203456404U
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- Prior art keywords
- circuit breaker
- arc
- magnetic
- coil
- connecting terminal
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- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The utility model discloses a direct-current circuit breaker which can protect equipment from being damaged by polarity misconnection of a user in the condition of no requirements for connection polarity during installation of the circuit breaker. The technical scheme of the utility model comprises: the circuit breaker comprises an upper wiring terminal, a lower wiring terminal, a bimetallic strip, a moving contact, a static contact, a magnetic trip coil, and an arc chute, wherein the moving contact and the static contact are corresponding to each other; an arc-striking angle is disposed at the outer side of a part which is located above a side of the arc chute; one side of the bimetallic strip is connected with the lower wiring terminal, and the other side of the bimetallic strip is connected with the moving contact; the static contact is connected with one side of the magnetic trip coil, and the other side of the magnetic trip coil is connected with the lower wiring terminal; the arc chute is arranged under one side of the static contact and is opposite to the magnetic trip coil; the circuit breaker also comprises a magnetic blow-out coil; one of two wiring terminals of the magnetic blow-out coil is connected with one side of the upper wiring terminal, and the other wiring terminal of the magnetic blow-out coil is connected with the arc-striking angle; and the magnetic blow-out coil is located at an inner side of the arc-striking angle.
Description
Technical field
The utility model relates to DC circuit breaker field, relates to especially the DC circuit breaker requiring without wiring polarity.
Background technology
For DC voltage, because electric current does not have zero passage, electric arc can not extinguish naturally by zero crossing, so be by magnet is installed in existing traditional DC circuit breaker, by magnet, electric arc is produced to magnetic induction force, make electric arc can move to arc extinguishing grid pieces, thereby cut apart breaking arc, cut off electric current.
Because adopt magnet to produce magnetic induction force in present DC circuit breaker, the direction of the magnetic induction force producing is constant.According to left hand rule, only, under specific currents direction, electric arc could be pushed into arc extinguishing grid pieces under the effect of magnetic induction force, otherwise electric arc can be to the motion of other direction, and initiation potential thus.Therefore,, when present DC circuit breaker is installed, in order to keep the specific sense of current, the binding post of DC circuit breaker is had to wiring polarity requirement.
Utility model content
The utility model aims to provide a kind of DC circuit breaker, it when mounted, there is no wiring polarity requirement,, two splicing ears of circuit breaker need not be divided into input terminal and outlet terminal, to connect respectively positive pole and the negative pole of electric current, namely, each of these two terminals both can connect electric current positive pole also can connect electric current negative pole.
According to DC circuit breaker of the present utility model, its technical scheme is as follows: a kind of DC circuit breaker, comprise upper connecting terminal and lower connecting terminal, bimetal leaf, the moving contact corresponding to each other and fixed contact, magnetic tripping coil, arc extinguishing grid pieces, upper outer in arc extinguishing grid pieces one side has arc leading angle, bimetal leaf one side is connected with upper connecting terminal, opposite side is connected with moving contact, fixed contact is connected with a side of magnetic tripping coil, the opposite side of magnetic tripping coil is connected with lower connecting terminal, arc extinguishing grid pieces is arranged in the below of the first side of stationary contact, relative with magnetic tripping coil, wherein, this DC circuit breaker also comprises and blows magnetic coil, this blows one in two binding posts of the magnetic coil side being connected with upper connecting terminal with bimetal leaf and connects, another is connected with arc leading angle, this blows magnetic coil and is positioned at arc leading angle inner side.
According to DC circuit breaker of the present utility model, on the basis of existing DC circuit breaker, added and blown magnetic coil.Under the Circuits System normal operating conditions at DC circuit breaker place, if electric current flows into from upper connecting terminal, in DC circuit breaker, mobile electric current flows through upper connecting terminal, bimetal leaf, moving contact, fixed contact, magnetic tripping coil and lower splicing ear successively so, there is no electric current through blowout coil, if electric current flows into from lower connecting terminal, electric current oppositely flows through above-mentioned parts successively so, still there is no electric current through blowout coil.
At electric current, be the in the situation that of entering DC circuit breaker from upper connecting terminal, when the Circuits System at DC circuit breaker place opens circuit, between moving contact and fixed contact, can produce electric arc, according to switch, cut-off principle, along with opening apart from strengthening between dynamic and static contact, one, the electric arc producing before dynamic and static contact can jump on arc leading angle, therefore, has electric current process in blowout coil.According to Law of Biot-Savart-Laplace (Biot-Savart-laplace law), this electric current can produce magnetic field.This magnetic fields is on electric arc, and the effect that electric arc is subject to Ampere force can move downward, and according to ampere left hand principle, electric arc can be subject to entering arc extinguishing grid pieces towards the electromagnetic force of arc extinguishing grid pieces.
At electric current, be the in the situation that of entering DC circuit breaker from lower connecting terminal, because the sense of current mobile in DC circuit breaker changes, the direction of arc current takes a turn for the worse, now, the magnetic direction being produced by blowout coil also takes a turn for the worse, the suffered ampere force direction of electric arc remains unchanged towards arc extinguishing grid pieces position, and electric arc still can enter arc extinguishing grid pieces.
Therefore, according to DC circuit breaker of the present utility model, no matter how enter the sense of current of DC circuit breaker, when the Circuits System at this DC circuit breaker place opens circuit, the electric arc producing between the dynamic and static contact of this DC circuit breaker can be subject to the active force in the magnetic field of blowout coil generation, and the direction of this electromagnetic force is constant downward, therefore, electric arc can enter arc extinguishing grid pieces downwards.Thereby, according to DC circuit breaker of the present utility model, can realize without wiring polarity and connecting.This is particularly useful in the DC circuit breaker product of current terminal distribution product (FD), and the nonpolarity connection of DC circuit breaker can prevent that user from causing device damage because polarity connects error.
Preferably, this blows magnetic coil and is arranged as between fixed contact and arc leading angle.
To blow magnetic coil and be arranged between fixed contact and arc leading angle, and dwindled fixed contact and blown the distance between magnetic coil, the electric arc that contributes to produce between dynamic and static contact enters and blows in magnetic coil.
Preferably, this blows magnetic coil and is arranged as near arc extinguishing grid pieces upper end.
To blow magnetic coil and be arranged as near arc extinguishing grid pieces upper end, shorten the distance of blowing between magnetic coil and arc extinguishing grid pieces upper end, and therefore, jump and easily enter arc extinguishing grid pieces downwards into the electric arc of arc leading angle.
According to DC circuit breaker of the present utility model, can realize it when mounted, there is no wiring polarity requirement, can prevent that user from causing device damage because polarity connects error.
Accompanying drawing explanation
Other advantage of the present utility model and feature are by from ensuing that only provide with the object of non-limiting example and represent that the explanation of specific embodiment of the present utility model in the accompanying drawings becomes more obviously clear, in the accompanying drawings:
Fig. 1 is the structural representation according to DC circuit breaker of the present utility model, and wherein, electric current flows into from upper connecting terminal, dynamic and static contact closure;
Fig. 2 is the structural representation according to DC circuit breaker of the present utility model, and wherein, electric current flows into from upper connecting terminal, and dynamic and static contact disconnects, and between dynamic and static contact, produces electric arc;
Fig. 3 is the structural representation according to DC circuit breaker of the present utility model, and wherein, electric current flows into from upper connecting terminal, and dynamic and static contact disconnects, and produces electric arc and jumped on arc leading angle between dynamic and static contact;
Fig. 4 is the structural representation according to DC circuit breaker of the present utility model, and wherein, electric current flows into from lower connecting terminal, and dynamic and static contact disconnects, and produces electric arc and jump on arc leading angle between dynamic and static contact.
Description of reference numerals
1 upper connecting terminal
2 bimetal leafs
3 blow magnetic coil
4 arc leading angles
5 fixed contacts
6 arc extinguishing grid pieces
7 lower connecting terminals
8 magnetic tripping coils
9 moving contacts
10 electric arcs
Embodiment
Below, in conjunction with Fig. 1 to Fig. 4, DC circuit breaker of the present utility model is described in detail.
The upper and lower, left and right of mentioning in the application's specification and claims all refer to reference to the upper and lower, left and right relation in accompanying drawing 1 to 4.With respect to DC circuit breaker generally speaking inner side is, the side of pointing to DC circuit breaker inside is inner side.
As shown in Figure 1, according to DC circuit breaker of the present utility model, comprise upper connecting terminal 1 and lower connecting terminal 7, bimetal leaf 2, the moving contact 9 corresponding to each other and fixed contact 5, magnetic tripping coil 8, arc extinguishing grid pieces 6, above arc extinguishing grid pieces 6 right sides, there is arc leading angle 4, bimetal leaf 2 left sides are connected with upper connecting terminal 1, right side is connected with moving contact 9, fixed contact 5 is connected with the upper end of magnetic tripping coil 8, the lower end of magnetic tripping coil 8 is connected with lower connecting terminal 7, arc extinguishing grid pieces 6 is arranged in the lower right of fixed contact 5, relative with magnetic tripping coil 8, this DC circuit breaker also comprises and blows magnetic coil 3, this of blowing in two binding posts of magnetic coil 3 is connected with the right side of bimetal leaf 2, another is connected with arc leading angle 4, blow magnetic coil 3 and be positioned at arc leading angle left side, near fixed contact.
As shown in Figure 1, the Circuits System normal operation at this DC circuit breaker place, electric current flows into from upper connecting terminal 1, direction of current flow as shown by arrows, flow through successively upper connecting terminal 1, bimetal leaf 2, moving contact 9, fixed contact 5, magnetic tripping coil 8 and lower splicing ear 7, as can be seen from Figure 1, there is no electric current through blowout coil 3.Still in the situation that the normal operation of the Circuits System at DC circuit breaker place, if electric current flows into from lower connecting terminal 7, electric current oppositely flows through above-mentioned parts successively so, that is: successively by lower splicing ear 7, magnetic tripping coil 8, fixed contact 5, moving contact 9, bimetal leaf 2 and upper connecting terminal 1, still there is no in this case electric current through blowout coil, this direction of current flow is not shown in the drawings.
As shown in Figure 2, electric current enters DC circuit breaker from upper connecting terminal 1, direction of current flow as shown by arrows, when the Circuits System at DC circuit breaker place opens circuit, between moving contact 5 and fixed contact 5, can produce electric arc 10, according to switch, cut-off principle, along with opening apart from strengthening between dynamic and static contact, dynamic and static contact 5,10 1, the electric arc producing before 9 can jump on arc leading angle, now, as shown in Figure 3, in blowout coil 3, have electric current process.According to Law of Biot-Savart-Laplace (Biot-Savart-laplace law), this electric current can produce magnetic field.This magnetic fields is on electric arc 10, and the effect that electric arc 10 is subject to Ampere force can move downward, and according to ampere left hand principle, electric arc 10 can be subject to entering arc extinguishing grid pieces 6 towards the electromagnetic force of arc extinguishing grid pieces 6.
As shown in Figure 4, electric current enters DC circuit breaker from lower connecting terminal 7, direction of current flow as shown by arrows, because the sense of current mobile in DC circuit breaker changes, electric arc 10 senses of current take a turn for the worse, and now, the magnetic direction being produced by blowout coil 3 also takes a turn for the worse, the suffered ampere force direction of electric arc 10 remains unchanged towards arc extinguishing grid pieces 6 positions, and electric arc 10 still can enter arc extinguishing grid pieces 6.
Therefore, according to DC circuit breaker of the present utility model, no matter how enter the sense of current of DC circuit breaker, when the Circuits System at this DC circuit breaker place opens circuit, the electric arc producing between the dynamic and static contact of this DC circuit breaker can be subject to the active force in the magnetic field of blowout coil generation, and the direction of this electromagnetic force is constant downward, therefore, electric arc can enter arc extinguishing grid pieces downwards.Thereby, according to DC circuit breaker of the present utility model, can realize without wiring polarity and connecting.This is particularly useful in the DC circuit breaker product of current terminal distribution product F D, and the nonpolarity connection of DC circuit breaker can prevent that user from causing device damage because polarity connects error.
To blow magnetic coil 3 is arranged between fixed contact 5 and arc leading angle 4, in Fig. 1 to 4, for blowing magnetic coil 3, be arranged in arc leading angle 4 left sides, near fixed contact 5, this arrangement has dwindled fixed contact 5 and has blown the distance between magnetic coil 3, the electric arc 10 that contributes between dynamic and static contact 9,5 to produce enters and blows in magnetic coil 3.
Further, can also be arranged as near arc extinguishing grid pieces 6 upper ends blowing magnetic coil 3.
To blow magnetic coil 3 and be arranged as near arc extinguishing grid pieces 6 upper ends, shorten the distance of blowing between magnetic coil 3 and arc extinguishing grid pieces 6 upper ends, and therefore, jump and easily enter arc extinguishing grid pieces 6 downwards into the electric arc 10 of arc leading angle 4.
According to DC circuit breaker of the present utility model, can realize it when mounted, there is no wiring polarity requirement, can prevent that user from causing device damage because polarity connects error.
Above the utility model is described in detail; for one of ordinary skill in the art; thought according to the utility model embodiment; change in specific embodiments and applications should not thought and to have departed from the scope of the utility model protection; in sum, this description should not be construed as restriction of the present utility model.
Claims (3)
1. a DC circuit breaker, comprise upper connecting terminal (1) and lower connecting terminal (7), bimetal leaf (2), the moving contact corresponding to each other (9) and fixed contact (5), magnetic tripping coil (8), arc extinguishing grid pieces (6), upper outer in described arc extinguishing grid pieces (6) one sides has arc leading angle (4), described bimetal leaf (2) one sides are connected with described upper connecting terminal (1), opposite side is connected with described moving contact (9), described fixed contact (5) is connected with a side of described magnetic tripping coil (8), the opposite side of described magnetic tripping coil (8) is connected with described lower connecting terminal (7), described arc extinguishing grid pieces (6) is arranged in the below of described fixed contact (5) one sides, relative with described magnetic tripping coil (8), it is characterized in that, described DC circuit breaker also comprises and blows magnetic coil (3), a side being connected with described upper connecting terminal (1) with described bimetal leaf (2) in described two binding posts that blow magnetic coil (3) connects, another is connected with described arc leading angle (4), the described magnetic coil (3) that blows is positioned at described arc leading angle (4) inner side.
2. DC circuit breaker according to claim 1, is characterized in that: described in blow magnetic coil (3) and be arranged as between described fixed contact (5) and described arc leading angle (4).
3. DC circuit breaker according to claim 1 and 2, is characterized in that: described in blow magnetic coil (3) and be arranged as near described arc extinguishing grid pieces (6) upper end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320529276.XU CN203456404U (en) | 2013-08-28 | 2013-08-28 | Direct-current circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320529276.XU CN203456404U (en) | 2013-08-28 | 2013-08-28 | Direct-current circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203456404U true CN203456404U (en) | 2014-02-26 |
Family
ID=50136262
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320529276.XU Withdrawn - After Issue CN203456404U (en) | 2013-08-28 | 2013-08-28 | Direct-current circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203456404U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104425194A (en) * | 2013-08-28 | 2015-03-18 | 施耐德电器工业公司 | DC circuit breaker |
| CN104851733A (en) * | 2015-04-17 | 2015-08-19 | 沈涛 | Mechanical-type direct current breaker applicable to electric or electronic system and electrical machine |
| CN110349794A (en) * | 2019-06-20 | 2019-10-18 | 公牛集团股份有限公司 | A kind of breaker |
-
2013
- 2013-08-28 CN CN201320529276.XU patent/CN203456404U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104425194A (en) * | 2013-08-28 | 2015-03-18 | 施耐德电器工业公司 | DC circuit breaker |
| CN104425194B (en) * | 2013-08-28 | 2017-08-11 | 施耐德电器工业公司 | A kind of dc circuit breaker |
| CN104851733A (en) * | 2015-04-17 | 2015-08-19 | 沈涛 | Mechanical-type direct current breaker applicable to electric or electronic system and electrical machine |
| CN110349794A (en) * | 2019-06-20 | 2019-10-18 | 公牛集团股份有限公司 | A kind of breaker |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140226 Effective date of abandoning: 20170811 |
|
| AV01 | Patent right actively abandoned |