CN206490419U - A kind of vacuum current limiting circuit breaker - Google Patents
A kind of vacuum current limiting circuit breaker Download PDFInfo
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- CN206490419U CN206490419U CN201720158587.8U CN201720158587U CN206490419U CN 206490419 U CN206490419 U CN 206490419U CN 201720158587 U CN201720158587 U CN 201720158587U CN 206490419 U CN206490419 U CN 206490419U
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Abstract
The utility model discloses a kind of vacuum current limiting circuit breaker; belong to electrotechnical, electronic protection field; the vacuum circuit breaker includes vacuum switch, fly-wheel diode, shut-off electric capacity, shut-off switch and piezo-resistance; the vacuum switch is arranged between power supply and load; the fly-wheel diode is in parallel with the vacuum switch; the negative electrode of the fly-wheel diode connects the power supply; the anode of the fly-wheel diode connects the load, and the power supply passes sequentially through shut-off electric capacity, the shut-off switch connection load.The utility model is simple in construction, reliability and durability, by setting reverse continued flow tube and buffer circuit vacuum switch is obtained the no-voltage medium recovery time after arc current forces zero passage, improve the medium recovery ability of vacuum interrupter, can it is small open away from when turn off high climbing short circuit current flow.
Description
Technical field
The invention belongs to electrotechnical, electronic protection field, more particularly to a kind of vacuum current limiting circuit breaker.
Background technology
Direct current power system compared with AC electric power systems, have the advantages that loss it is low, grid-connected convenient, now the U.S.,
The developed countries such as Japan, Germany have gradually adopted direct current transmission and distribution system.In addition, the isolated power system such as Modern Ships, subway
Also direct current power system is used more and more.In order to limit the short circuit current flow constantly increased, the safety of electrical equipment is protected, urgently
The direct current current-limiting circuit breaker that current limiting capacity is stronger, reliability is higher need to be developed.Due to there is electricity in tradition machinery formula dc circuit breaker
The ablation effect of arc, electrical endurance is shorter, current limitation effect is poor, and the solid-state switch being made up of power semiconductor is due to on-state
Excessive, selling at exorbitant prices is lost and is also difficult to popularization and application.
The content of the invention
In view of this, a kind of vacuum current limiting circuit breaker of present invention offer is simple in construction, reliability and durability, reversely continuous by setting
Flow tube and buffer circuit make vacuum switch obtain the no-voltage medium recovery time after arc current forces zero passage, improve vacuum
The medium recovery ability of arc-chutes, can it is small open away from when turn off high climbing short circuit current flow.
The present invention is solved the above problems by following technological means：
A kind of vacuum current limiting circuit breaker, it is characterised in that opened including vacuum switch, fly-wheel diode, shut-off electric capacity, shut-off
Close and piezo-resistance, the vacuum switch is arranged between power supply and load；The fly-wheel diode and the vacuum switch are simultaneously
Connection, the negative electrode of the fly-wheel diode connects the power supply, and the anode of the fly-wheel diode connects the load；The shut-off
Electric capacity connect with shut-off switch after, be connected in parallel on the two ends of the vacuum switch, the power supply passes sequentially through shut-off electric capacity, turns off and open
Connection connects the load；The shut-off switch is N-type MOSFET, N-type MOSFET drain electrode, institute described in the shut-off capacitance connection
The source electrode for stating N-type MOSFET connects the load, and the grid of the N-type MOSFET connects connection control circuit, in addition to the second electric capacity
And second resistance, second electric capacity connected with second resistance after, be connected in parallel on the two ends of the fly-wheel diode.
Further, described vacuum switch includes vacuum interrupter, self-locking mechanism and suction coil, the vacuum extinction
Room includes the first contact and the second contact, and being provided with pressure between one end inner side of second contact and vacuum extinction locular wall answers
Position spring, the other end of second contact is provided with suction dish, the suction dish and the supporting setting of the suction coil, described
Positive stop lug boss is provided with the middle part of second contact, the positive stop lug boss corresponding position is provided with self-locking mechanism, the self-locking mechanism bag
Self-lock rod is included, one end of the self-lock rod is provided with self-locking pulley, and the other end of the self-lock rod is provided with handle, the self-locking
Self-locking spring is provided with the middle part of bar.
A kind of vacuum current limiting circuit breaker of the present invention has the advantages that：
The invention discloses a kind of vacuum current limiting circuit breaker, belong to electrotechnical, electronic protection field, the vacuum circuit breaker includes
Vacuum switch, fly-wheel diode, shut-off electric capacity, shut-off switch and piezo-resistance, the vacuum switch are arranged on power supply and load
Between, the fly-wheel diode is in parallel with the vacuum switch, and the negative electrode of the fly-wheel diode connects the power supply, described continuous
The anode for flowing diode connects the load, and the power supply passes sequentially through shut-off electric capacity, the shut-off switch connection load.This hair
It is bright simple in construction, reliability and durability, by setting reverse continued flow tube and buffer circuit vacuum switch is forced zero passage in arc current
After obtain the no-voltage medium recovery time, improve the medium recovery ability of vacuum interrupter, can it is small open away from when close
Broken height climbing short circuit current flow.The present invention proposes that a kind of vacuum switch two ends in traditional forced commutation type breaker are in parallel reversely
Fly-wheel diode improvement project, vacuum switch is obtained the dielectric strength of no-voltage after current over-zero by this improvement
Recovery process so that high-speed vacuum switch is able to drive away from ShiShimonoseki broken height climbing short circuit current flow small, substantially increases breaker
Current limliting and breaking capacity, have the advantages that small on-state loss, strong breaking capacity, contact burning be small, electrical endurance is long.
Brief description of the drawings
In order to illustrate more clearly of technical scheme, the required accompanying drawing used in embodiment will be made below
Simply introduce, it should be apparent that, drawings in the following description are only some embodiments of the present invention, general for this area
For logical technical staff, on the premise of not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of circuit connection diagram for vacuum current limiting circuit breaker that the present invention is provided；
Fig. 2 is a kind of vacuum switch structure schematic diagram for vacuum current limiting circuit breaker that the present invention is provided；
Fig. 3 is a kind of self-locking mechanism structural representation for vacuum current limiting circuit breaker that the present invention is provided.
Embodiment
In the description of the invention, it is to be understood that term " " center ", " on ", " under ", "front", "rear", " left side ",
The orientation or position relationship of the instruction such as " right side ", " vertical ", " level ", " top ", " bottom ", " interior ", " outer " are based on shown in the drawings
Orientation or position relationship, are for only for ease of the description present invention and simplify description, rather than indicate or imply signified device or
Element must have specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.Art
Language " first ", " second " are only used for describing purpose, and it is not intended that indicating or implying relative importance or implicit indicate institute
The quantity of the technical characteristic of instruction.Thus, " first " is defined, one can be expressed or be implicitly included to the feature of " second "
Or more this feature.In the description of the invention, unless otherwise indicated, " multiple " are meant that two or more.
Below with reference to accompanying drawing, the present invention is described in detail.
As shown in figure 1, a kind of vacuum current limiting circuit breaker, including vacuum switch B1, sustained diode 1, shut-off electric capacity C1,
Shut-off switch Q1 and piezo-resistance R1, between the vacuum switch B1 is arranged on power supply and loaded；The sustained diode 1 with
The vacuum switch B1 is in parallel, and the negative electrode of the sustained diode 1 connects the power supply, the anode of the sustained diode 1
The connection load；The shut-off electric capacity C1 connected with shut-off switch Q1 after, be connected in parallel on the two ends of the vacuum switch B1, it is described
Power supply passes sequentially through shut-off electric capacity C1, the shut-off switch Q1 connections load；The shut-off switch Q1 is N-type MOSFET, described
Electric capacity C1 connections N-type MOSFET drain electrode is turned off, the source electrode of the N-type MOSFET connects the load, the N-type
MOSFET grid connects connection control circuit, in addition to the second electric capacity C2 and second resistance R2, the second electric capacity C2 and the second electricity
Hinder after R2 series connection, be connected in parallel on the two ends of the sustained diode 1.
Specifically, the sustained diode 1 of B1 two ends parallel connection reversely is switched in high-speed vacuum, so when reverse impulse electricity
Stream is forced after vacuum switch B1 arc extinction, and sustained diode 1 is turned on, and main circuit current is transferred to reverse cut-off current
Sustained diode 1, now vacuum switch B1 both end voltages are zero, until when reverse cut-off current is again equal to main circuit current,
Diode reverse is ended, and major loop holds reverse charging to power-off, and vacuum switch B1 two ends start to occur recovering voltage.
Specifically, the second electric capacity C2 and second resistance R2 constitute buffer circuit, it is to avoid voltage is excessive or electric current is excessive makes
Into circuit infringement.As charging process voltage is improved constantly, and the threshold value of pressure sensitive voltage action is reached in voltage（1000V）, pressure
Quick resistance R1 is begun to turn on.After piezo-resistance R1 works, turn-off circuit electric current is shifted to piezo-resistance R1 branch roads, turn-off circuit
Electric current is transferred to piezo-resistance R1 branch roads completely, and shut-off electric capacity C1 charging voltages and breaker both end voltage reach maximum.
As shown in Figure 2,3, described vacuum switch B1 includes vacuum interrupter 1, self-locking mechanism 2 and suction coil 3, described
Vacuum interrupter 1 includes on the inside of the first contact 101 and the second contact 102, one end of second contact 102 and vacuum interrupter
Pressure back-moving spring 103 is provided between 1 wall, the other end of second contact 102 is provided with suction dish 105, the suction
Disk 105 and the supporting setting of the suction coil 3, the middle part of second contact 102 is provided with positive stop lug boss 104, the boss
104 corresponding positions are provided with self-locking mechanism 2.
Further, described vacuum switch B1 includes vacuum interrupter 1, self-locking mechanism 2 and suction coil 3, described true
Empty arc-chutes 1 include on the inside of the first contact 101 and the second contact 102, one end of second contact 102 and vacuum interrupter 1
Pressure back-moving spring 103 is provided between wall, the other end of second contact 102 is provided with suction dish 105, the suction dish
105 with the suction coil 3 it is supporting set, the middle part of second contact 102 is provided with positive stop lug boss 104, the boss 104
Corresponding position is provided with self-locking mechanism 2, and the self-locking mechanism 2 includes self-lock rod 201, and one end of the self-lock rod 201 is provided with certainly
Pulley 202 is locked, the other end of the self-lock rod 201 is provided with handle 204, and the middle part of the self-lock rod 201 is provided with self-locking bullet
Spring 203.
Specifically, switching B1 high-speed responses speed, high initially-separate speed to high-speed vacuum to meet novel breaker
Requirement, it is proposed that the high-speed vacuum switch B1 based on electromagnetic attraction mechanism：
（1）"on" position：The contact pressure of vacuum switch B1 "on" positions is self-closing by compression spring and vacuum interrupter 1
Power is produced, to ensure low-resistance characteristic during vacuum switch B1 conductings.
（2）Separating brake：The pulse discharge circuit precharged during separating brake discharges suction coil 3, by suction dish 105 with inhaling
The electromagnetic attraction that is produced between line of force circle 3 promotes suction dish 105 to drive moving contact quick separating, contact move to it is certain open away from rear,
Self-locking mechanism 2 is fixed on open position.
The invention discloses a kind of vacuum current limiting circuit breaker, belong to electrotechnical, electronic protection field, the vacuum circuit breaker includes
Vacuum switch B1, sustained diode 1, shut-off electric capacity C1, shut-off switch Q1 and piezo-resistance R1, the vacuum switch B1 settings
Between power supply and load, the sustained diode 1 is in parallel with the vacuum switch B1, the negative electrode of the sustained diode 1
The power supply is connected, the anode of the sustained diode 1 connects the load, and the power supply passes sequentially through shut-off electric capacity C1, closed
Disconnect and close the Q1 connections load.The present invention is simple in construction, reliability and durability, by setting reverse continued flow tube and buffer circuit to make very
Air switch closes B1 and the no-voltage medium recovery time is obtained after arc current forces zero passage, and the medium for improving vacuum interrupter 1 is extensive
Reactivation power, can it is small open away from when turn off high climbing short circuit current flow.The present invention proposes one kind in traditional forced commutation type
The improvement project of the vacuum switch B1 two ends of breaker reverse sustained diode 1 in parallel, makes vacuum switch by this improvement
B1 obtains the dielectric strength recovery process of no-voltage after current over-zero so that high-speed vacuum switch B1 is able to drive away from ShiShimonoseki small
Broken height climbing short circuit current flow, substantially increases the current limliting and breaking capacity of breaker, with on-state loss is small, breaking capacity
By force, the advantages of contact burning is small, electrical endurance is long.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
The present invention is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：It still may be used
To be modified to the technical scheme described in foregoing embodiments, or equivalent substitution is carried out to which part technical characteristic；
And these modification or replace, do not make appropriate technical solution essence depart from various embodiments of the present invention technical scheme spirit and
Scope.
Claims (2)
1. a kind of vacuum current limiting circuit breaker, it is characterised in that including vacuum switch, fly-wheel diode, shut-off electric capacity, shut-off switch
And piezo-resistance, between the vacuum switch is arranged on power supply and loaded；The fly-wheel diode is in parallel with the vacuum switch,
The negative electrode of the fly-wheel diode connects the power supply, and the anode of the fly-wheel diode connects the load；The shut-off electricity
Hold after being connected with shut-off switch, be connected in parallel on the two ends of the vacuum switch, the power supply passes sequentially through shut-off electric capacity, shut-off switch
The connection load；The shut-off switch is N-type MOSFET, and N-type MOSFET drain electrode, described described in the shut-off capacitance connection
N-type MOSFET source electrode connects the load, and the grid of the N-type MOSFET connects connection control circuit, in addition to the second electric capacity with
Second resistance, second electric capacity connected with second resistance after, be connected in parallel on the two ends of the fly-wheel diode.
2. a kind of vacuum current limiting circuit breaker according to claim 1, it is characterised in that described vacuum switch includes vacuum
Arc-chutes, self-locking mechanism and suction coil, the vacuum interrupter include the first contact and the second contact, second contact
Pressure back-moving spring is provided between vacuum extinction locular wall on the inside of one end, the other end of second contact is provided with suction
Positive stop lug boss is provided with the middle part of disk, the suction dish and the supporting setting of the suction coil, second contact, it is described spacing
Boss corresponding position is provided with self-locking mechanism, and the self-locking mechanism includes self-lock rod, and one end of the self-lock rod is provided with self-locking cunning
Wheel, the other end of the self-lock rod, which is provided with the middle part of handle, the self-lock rod, is provided with self-locking spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720158587.8U CN206490419U (en) | 2017-02-22 | 2017-02-22 | A kind of vacuum current limiting circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720158587.8U CN206490419U (en) | 2017-02-22 | 2017-02-22 | A kind of vacuum current limiting circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206490419U true CN206490419U (en) | 2017-09-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720158587.8U Active CN206490419U (en) | 2017-02-22 | 2017-02-22 | A kind of vacuum current limiting circuit breaker |
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| CN (1) | CN206490419U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110346712A (en) * | 2019-07-15 | 2019-10-18 | 南方电网科学研究院有限责任公司 | A kind of EFFECTIVE MEDIUM recovery test circuit |
-
2017
- 2017-02-22 CN CN201720158587.8U patent/CN206490419U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110346712A (en) * | 2019-07-15 | 2019-10-18 | 南方电网科学研究院有限责任公司 | A kind of EFFECTIVE MEDIUM recovery test circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Vacuum current -limiting circuit -breaker Effective date of registration: 20200323 Granted publication date: 20170912 Pledgee: Shaanxi cultural industry finance Company limited by guarantee Pledgor: XI'AN QIANJIN ELECTRIC INDUSTRIAL Co.,Ltd. Registration number: Y2020610000026 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20210319 Granted publication date: 20170912 Pledgee: Shaanxi cultural industry finance Company limited by guarantee Pledgor: XI'AN QIANJIN ELECTRIC INDUSTRIAL Co.,Ltd. Registration number: Y2020610000026 |