CN209447757U - A kind of magnetic quenching system of plastic housing dc circuit breaker - Google Patents
A kind of magnetic quenching system of plastic housing dc circuit breaker Download PDFInfo
- Publication number
- CN209447757U CN209447757U CN201920547385.1U CN201920547385U CN209447757U CN 209447757 U CN209447757 U CN 209447757U CN 201920547385 U CN201920547385 U CN 201920547385U CN 209447757 U CN209447757 U CN 209447757U
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- static contact
- iron core
- arc
- coil
- shaped iron
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Abstract
The utility model relates to a kind of magnetic quenching systems of plastic housing dc circuit breaker, including static contact and the arc-extinguish chamber being arranged on static contact, stationary contact is formed on the static contact, U-shaped iron core is provided on the static contact, coil is wound on the U-shaped iron core, the stationary contact is arranged between U-shaped iron core, and notch is formed on static contact, the both ends of the coil are respectively electrically connected to the two sides of notch, and coil constitutes the diverter branch of static contact.This practical plastic housing dc circuit breaker disjunction generates electric arc, coil has electric current to flow through generation magnetic field simultaneously, U-shaped iron core strengthens its magnetic field strength, electric arc generates Lorentz force under the magnetic fields of U-shaped iron core, keep electric arc mobile toward the direction of arc-extinguish chamber and enters arc-extinguish chamber realization arc extinguishing, the extinguishing for accelerating electric arc avoids electric arc long-time from there is and burn the contact of plastic housing dc circuit breaker, improves product service life.
Description
Technical field
The utility model relates to a kind of plastic housing dc circuit breaker more particularly to a kind of magnetic quenchings of plastic housing dc circuit breaker
System.
Background technique
With the development of new energy technology, the continuous development especially with photovoltaic power plant is grown, to low voltage component
More stringent requirements are proposed.Plastic housing AC circuit breaker is the sine wave that frequency is 50Hz, each of which period there are two zero crossing,
Plastic housing AC circuit breaker is not necessarily the electric arc of crest voltage generation when disconnecting, zero crossing disconnection will not even generate electric arc,
Therefore the electric arc generated when its disjunction is variation；Unlike plastic housing AC circuit breaker, plastic housing dc circuit breaker is stable
DC voltage, no zero crossing, the electric arc that when disjunction generates be it is constant, the time existing for electric current is longer, and electric arc is also more
Hardly possible is extinguished, and electric arc is also bigger to the extent of the destruction of dynamic/static contact.
Summary of the invention
In view of this, the purpose of this utility model is to provide a kind of modelings that can quickly extinguish electric arc, promote the contact service life
The magnetic quenching system of shell dc circuit breaker.
In order to achieve the goal above, the utility model uses the magnetic quenching system of such a plastic housing dc circuit breaker,
Including static contact and the arc-extinguish chamber being arranged on static contact, stationary contact is formed on the static contact, is provided with U on the static contact
Shaped iron core is wound with coil on the U-shaped iron core, and the stationary contact is arranged between U-shaped iron core, and the both ends of the coil are distinguished
It is connected electrically in stationary contact both sides of head, coil constitutes the shunting circuit of static contact.
The working principle of the magnetic quenching system of above-mentioned plastic housing dc circuit breaker is: when plastic housing dc circuit breaker disjunction
When, moving contact is separated from static contact generates electric arc, while there is potential difference at the both ends of coil, have electric current to flow through coil and generate magnetic
, U-shaped iron core strengthens its magnetic field strength, and electric arc generates Lorentz force under the magnetic fields that U-shaped iron core and coil are formed, makes
Electric arc is mobile toward the direction of arc-extinguish chamber and enters arc-extinguish chamber realization arc extinguishing, accelerates the extinguishing of electric arc, electric arc is avoided to deposit for a long time
And burn the contact of plastic housing dc circuit breaker, improve product service life.
Originally practical to be further arranged to form notch on static contact, the both ends of the coil are respectively electrically connected to the two of notch
Side.
Notch is formed after the above-mentioned fluting to static contact inlet wire, it is to increase that the both ends of coil, which are connected electrically in the both ends of notch,
The potential difference at ledger line circle both ends, improving the size of current passed through on coil makes magnetic blow-out to improve the magnetic field strength on coil
The effect of arc extinguishing is more preferable.
This is practical to be further arranged to U-shaped iron core and is integrally formed, and U-shaped iron core includes the first pole, interconnecting piece, the second pole
Column, the coil be successively wound on the first pole and the second pole on.
Above-mentioned coil winding guarantees the first pole and the second pole on being successively wound on the first pole and on the second pole
Between magnetic direction be it is parallel, magnetic direction perpendicular to electric arc direction, the Lorentz force for being subject to electric arc be it is strongest,
Improve the effect of magnetic quenching system.
Originally practical to be further arranged to be provided with insulation board between interconnecting piece and static contact, the stationary contact setting is connecting
The surface in portion.
Above-mentioned insulation board has completely cut off iron core and static contact, avoids influencing each other between the two；Stationary contact is being located at interconnecting piece just
Top is that the electric arc generated for breaker disjunction is in magnetic field caused by U-shaped iron core and coil.
Originally practical to be further arranged to be provided with the U-shaped partition being adapted to it on U-shaped iron core, the arc-extinguish chamber includes arc extinguishing
Piece and arc extinguishing partition, the arc extinguishing partition mutually splice with U-shaped partition.
Above-mentioned U-shaped partition can protect U-shaped iron core and coil, will not be by the destruction of electric arc, and U-shaped partition and arc extinguishing partition are spelled
It connects, i.e., arc-extinguish chamber abuts U-shaped iron core, shortens electric arc to the distance of arc-extinguish chamber, accelerates arc extinguishing speed.
Detailed description of the invention
Fig. 1 is the utility model embodiment perspective view.
Fig. 2 is the utility model embodiment top view.
Fig. 3 is the cross-sectional view of A-A in Fig. 2.
Fig. 4 is the U-shaped iron core of the utility model embodiment and coil perspective view.
Fig. 5 is that the utility model embodiment removes perspective view after arc-extinguish chamber.
Fig. 6 is the U-shaped iron core of the utility model embodiment and coil main view.
Specific embodiment
As shown in figures 1 to 6, the utility model is a kind of magnetic quenching system of plastic housing dc circuit breaker, including static contact 1,
Arc-extinguish chamber 3 and the matched moving contact 2 of static contact 1 on static contact 1 are set, form stationary contact 11, institute on the static contact 1
It states and is provided with U-shaped iron core 4 on static contact 1, the U-shaped iron core 4 is integrally formed, and U-shaped iron core 4 includes the first pole 41, connection
Portion 42, the second pole 43, are successively wound with coil 5 on first pole 41 and on the second pole 43, on the first pole 41
Coil is coiling counterclockwise, and the coil on the second pole 43 is coiling clockwise, forms notch 12 on static contact 1, notch 12
One end of two high voltage B side-draw and low potential point C, the coil 5 on first pole 41 connect high voltage B, the second pole
One end of coil 5 on column 43 connects low potential point C, and coil 5 constitutes the diverter branch of static contact 1, interconnecting piece 42 and static contact 1
Between be provided with insulation board 6, the stationary contact 11 is arranged in the surface of interconnecting piece 42, is provided on U-shaped iron core 4 and is adapted to it
U-shaped partition 7, the arc-extinguish chamber 3 includes arc quenching plate 31 and arc extinguishing partition 32, and the arc extinguishing partition 32 is mutually spelled with U-shaped partition 7
It connects.
According to above embodiments, when plastic housing dc circuit breaker disjunction, moving contact is separated from static contact generates electric arc, by
There is potential difference in coil both ends (between high voltage B and low potential point C), have electric current to flow through in coil and generate magnetic field, and it is U-shaped
Iron core strengthens its magnetic field strength, and the first pole is in the pole N, and the second pole is in the pole S, and magnetic direction is by the first pole to the second pole
Column, electric arc generate Lorentz force under magnetic fields, keep electric arc mobile toward the direction of arc-extinguish chamber and enter arc-extinguish chamber, electric arc is through going out
Arc extinguishing is realized after arcs partition, accelerates the extinguishing of electric arc, dynamic/static contact is protected not to be burned out, improve the service life of product.
The above-mentioned description to embodiment is for the ease of those skilled in the art it will be appreciated that and using this
Utility model.Person skilled in the art obviously easily can make modification to these embodiments, such as U-shaped iron core is online
High voltage and low potential point that direction of winding, the coil of circle are taken on static contact etc., and General Principle described herein
It is applied in other embodiments without having to go through creative labor.Therefore, the utility model is not limited to the above embodiments, ability
Field technique personnel announcement according to the present utility model does not depart from improvement made by the utility model scope and modification all Ying Ben
Within the scope of utility model protection.
Claims (5)
1. a kind of magnetic quenching system of plastic housing dc circuit breaker, including static contact and the arc-extinguish chamber being arranged on static contact, institute
It states and forms stationary contact on static contact, it is characterised in that: be provided with U-shaped iron core on the static contact, be wound on the U-shaped iron core
Coil, the stationary contact are arranged between U-shaped iron core, and the both ends of the coil are respectively electrically connected to stationary contact both sides of head, coil structure
At the diverter branch of static contact.
2. the magnetic quenching system of plastic housing dc circuit breaker according to claim 1, it is characterised in that: on the static contact
Notch is formed, the both ends of the coil are respectively electrically connected to the two sides of notch.
3. the magnetic quenching system of plastic housing dc circuit breaker according to claim 1 or 2, it is characterised in that: the U-shaped iron
Core is integrally formed, and U-shaped iron core includes the first pole, interconnecting piece, the second pole, and the coil is successively wound on the first pole
On the second pole.
4. the magnetic quenching system of plastic housing dc circuit breaker according to claim 3, it is characterised in that: the interconnecting piece with
Insulation board is provided between static contact, the surface of interconnecting piece is arranged in the stationary contact.
5. the magnetic quenching system of plastic housing dc circuit breaker according to claim 3, it is characterised in that: the U-shaped iron core
On be provided with the U-shaped partition being adapted to it, the arc-extinguish chamber includes arc quenching plate and arc extinguishing partition, the arc extinguishing partition and it is U-shaped every
Plate mutually splices.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920547385.1U CN209447757U (en) | 2019-04-22 | 2019-04-22 | A kind of magnetic quenching system of plastic housing dc circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920547385.1U CN209447757U (en) | 2019-04-22 | 2019-04-22 | A kind of magnetic quenching system of plastic housing dc circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209447757U true CN209447757U (en) | 2019-09-27 |
Family
ID=68034688
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920547385.1U Active CN209447757U (en) | 2019-04-22 | 2019-04-22 | A kind of magnetic quenching system of plastic housing dc circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209447757U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113471032A (en) * | 2020-03-30 | 2021-10-01 | 西门子股份公司 | Electromechanical compact protective switching device |
-
2019
- 2019-04-22 CN CN201920547385.1U patent/CN209447757U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113471032A (en) * | 2020-03-30 | 2021-10-01 | 西门子股份公司 | Electromechanical compact protective switching device |
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