CN101807497B - Direct-current circuit breaker with selectivity - Google Patents
Direct-current circuit breaker with selectivity Download PDFInfo
- Publication number
- CN101807497B CN101807497B CN200910008980.9A CN200910008980A CN101807497B CN 101807497 B CN101807497 B CN 101807497B CN 200910008980 A CN200910008980 A CN 200910008980A CN 101807497 B CN101807497 B CN 101807497B
- Authority
- CN
- China
- Prior art keywords
- circuit breaker
- auxiliary
- current
- short
- main
- 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.)
- Active
Links
Abstract
The invention relates to a direct-current circuit breaker comprising a main loop device and an auxiliary loop device which form two current loops connected in parallel, wherein the main loop device comprises a first tripper, a first magnetic tripping system, a first main contact, a main mechanism, a second tripper, a second magnetic tripping system and a second main contact, and the main mechanism is used for controlling the actions of the first main contact and the second main contact; the auxiliary loop device comprises a current directing and auxiliary triggering device, a short delay element, an auxiliary mechanism and an auxiliary tripper, wherein the current directing and auxiliary triggering device is connected between the anode and the cathode of a power supply in series and is used for detecting load short-circuit current and deciding whether the auxiliary triggering action is carried out or not according to the value of the load short-circuit current; the short delay element is used for carrying out short delaying when the auxiliary triggering action is carried out, and deciding whether the overtime signals of delayed time are outputted or not according to the fact whether the action of the current directing and auxiliary triggering device is kept or not; the auxiliary mechanism drives the main mechanism to make corresponding tripping actions; and the auxiliary tripper is used for triggering the auxiliary mechanism to trigger according to the fact the overtime signals of delayed time are outputted or not. The invention relates to the direct-current circuit breaker with selectivity.
Description
Technical field
The present invention relates to the DC circuit breaker using in a kind of direct-flow distribution system; particularly; relate to a kind of DC micro circuit breaker that the 3 segment fault protections that comprise overload protection, short circuit delay protection, short circuit instantaneous protection can be provided, to realize the selectivity to subordinate's terminal miniature circuit breaker.
Background technology
Along with the development of electric automatization, Mini-type direct current break has become a kind of electrical equipment being widely used in low pressure Terminal Power Distribution System.It can guarantee connection and disconnection under the desired rated current of various users, rated voltage and nominal load conventionally.In circuit, have any abnormal failure (for example overload or short circuit), thereby it can, by moving contact and fixed contact are disconnected to protected circuit, can make load completely and DC power supply isolation like this.
At present conventional Mini-type direct current break only provides 2 segment protect characteristics, i.e. overload protection and short circuit instantaneous protection, and short circuit short time-delay protective value is not provided, more can not realize the selectivity of the protection action in Terminal Power Distribution System.Therefore when fault occurs, often there is Mini-type direct current break overstep tripping or action simultaneously.This has just greatly affected the continuity of various distribution system power supplies.
So; need to have a kind of can provide to have comprise overload protection, short circuit delay protection, short circuit instantaneous protection at the Mini-type direct current break of 3 interior segment protects; to realize the selectivity to the subordinate's terminal miniature circuit breaker in distribution network, and make the distribution system power supply can be reliable and stable.
Summary of the invention
For above-mentioned shortcoming and defect, object of the present invention is exactly to realize the above-mentioned Mini-type direct current break with 3 segment protect characteristics.
Band selectivity Mini-type direct current break of the present invention, by using magnetic release system, can detect short-circuit current exactly, reliably, stably realizes short time delay function.Selectivity DC circuit breaker according to the present invention is simple in structure, compact, comprises major loop and subsidiary loop two parts.
Selectivity DC circuit breaker according to the present invention is by realize short time delay element by chip microprocessor, can supervisory circuit failure condition, control delay time, and guarantee the selectivity of the superior and the subordinate's circuit breaker.
According to one aspect of the invention, provide the DC circuit breaker using in a kind of direct-flow distribution system particularly, comprise circuit breaker major loop device and subsidiary loop device, circuit breaker major loop device and subsidiary loop device form two current circuits in parallel; Major loop device mainly comprises between the positive and negative electrode that is connected in series in successively DC power supply, the first release, the first magnetic tripping system, the first main contact, the second main contact, the second magnetic tripping system, second release of formation main current loop; Described main machine frame is controlled the closed of the first main contact and the second main contact or cuts off in the normal work of distribution system and overload fault situation.Described DC circuit breaker is characterised in that subsidiary loop device comprises current detecting auxiliary triggering device, short time delay element, auxiliary body, assistant release.Current detecting auxiliary triggering device is connected between the positive and negative electrode of DC power supply, detects the load short circuit current of DC circuit breaker, according to the load short circuit current value detecting, determines whether carrying out auxiliary triggering action; Whether short time delay element carries out of short duration time delay when current detecting auxiliary triggering device carries out auxiliary triggering action, and maintain and determine whether output delay time timeout signal according to the action of current detecting auxiliary triggering device; Auxiliary body drives main machine frame (5) to carry out the corresponding action of threading off; According to short time delay element, whether output delay time timeout signal moves assistant release, triggers auxiliary body and threads off.
Wherein subsidiary loop device also comprises: electric pressure converter, be connected in parallel on the output of circuit breaker, and the direct voltage after output is changed is powered into short time delay element.
Wherein current detecting auxiliary triggering device selects magnetic tripping system, auxiliary contact to realize, and wherein magnetic tripping system is connected between the first main contact and the circuit breaker load being connected below.
Wherein current detecting auxiliary triggering device selects shunt to realize.Preferably, the shunt in current detecting auxiliary triggering device is connected between the first main contact and the circuit breaker load being connected below.
Wherein said the first release, the second release select bimetal leaf to realize.
Wherein short time delay element selects RC delay circuit to realize.
Wherein short time delay element selects chip microprocessor to realize.
According to technique scheme of the present invention, because the different faults type for direct-flow distribution system provides optionally protected mode, therefore can guarantee the continuity of power supply.According to technique scheme of the present invention, only by the circuit breaker of the place's upper level that breaks down, eliminate fault.
Accompanying drawing explanation
By the detailed description to example embodiment below in conjunction with accompanying drawing, will understand better the present invention.It should be clearly understood that described example embodiment is only as explanation and example, and the invention is not restricted to this.The spirit and scope of the present invention are only limited by the particular content of appended claims.Brief description of drawings is described below, wherein:
Fig. 1 is the structural principle schematic diagram of the selectivity DC circuit breaker of the first example embodiment according to the present invention;
Fig. 2 is the structural principle schematic diagram of the selectivity DC circuit breaker of the second example embodiment according to the present invention.
Embodiment
To introduce in detail example embodiment of the present invention now, its example is shown in the drawings, all the identical identical element of reference numerals designate in accompanying drawing.Embodiment is described with reference to the accompanying drawings with explanation the present invention.
Fig. 1 is the structural principle schematic diagram of the selectivity DC circuit breaker of the first example embodiment according to the present invention.
As shown in Figure 1, selectivity DC circuit breaker according to the present invention comprises circuit breaker major loop device 100 and subsidiary loop device 200, and circuit breaker major loop device 100 and subsidiary loop device 200 form two current circuits in parallel.
Major loop device 100 mainly comprises the first release 1, the first magnetic tripping system 2, the first main contact 3, main machine frame 5, the second release 6, the second magnetic tripping system 7, the second main contact 8.Wherein the first release 1, the first magnetic tripping system 2, the first main contact 3, the circuit breaker load connecting below, the second main contact 8, the second magnetic tripping system 7, the second release 6 are connected in series between the positive and negative electrode of DC power supply successively, form main current loop.The circuit breaker load connecting is below connected to the output of circuit breaker.
Subsidiary loop device 200 comprises auxiliary magnetic tripping system 4, auxiliary contact 9, auxiliary body 10, electric pressure converter 12, short time delay element 13 and assistant release 14.Wherein auxiliary magnetic tripping system 4 is connected between the positive and negative electrode of DC power supply, and preferably, auxiliary magnetic tripping system 4 can be connected between the first main contact 3 and the circuit breaker load being connected below.Electric pressure converter 12, short time delay element 13, assistant release 14 and auxiliary body 10 form auxiliary current loop, and this auxiliary current loop is in parallel with the main current loop of circuit breaker loop apparatus 100.
In subsidiary loop device 200, preferably, electric pressure converter 12 can be connected in parallel on the output of circuit breaker.Electric pressure converter 12 is changed the direct voltage of input, and the direct voltage after output conversion is to 13 power supplies of short time delay element.Short time delay element 13 carries out of short duration time delay according to the closure of auxiliary contact 9, disconnection action.Assistant release 14, according to timeout signal action time of delay of short time delay element 13, triggers auxiliary body 10 and threads off, and then auxiliary body 10 drives main machine frames 5 action of threading off.
In the DC circuit breaker of Fig. 1, the first release 1, the second release 6 can select conventional bimetal leaf to realize; Short time delay element 13, can realize by RC delay circuit.
Divide 4 kinds of situations to describe particularly according to the specific works principle of the structure of the selectivity DC circuit breaker of the first example embodiment of the present invention below.
(A) when there is no fault, while normally working
When there is no fault, while normally working, the first main contact 3, the second main contact 8 are all closed, and auxiliary contact 9 disconnects.User drives main machine frame 5 by operating grip, can according to expectation come closed, disconnect the first main contact 3, the second main contact 8, and then connect, cut off the electricity supply with load between be connected.
(B) when load generation overload fault
When load generation overload fault, at least one can detect overload fault the first release 1, the second release 6, and promote main machine frame 5 action of threading off, main machine frame 5 can disconnect the first main contact 3, the second main contact 8, and then cut off the electricity supply and have being connected between the load of overload fault, the impact of the overload fault of getting rid of load on distribution system.Only after fixing a breakdown, armrest moves the first main contact 3, second main contact 8 of closed this DC circuit breaker again.
In load generation overload fault, under general overload situations, subsidiary loop device 200 is not worked, and auxiliary contact 9 disconnects.
When load is too large, can think short trouble situation, referring to situation (C) below and (D).
(C) when load is short-circuited fault and short circuit current while being less than selectivity limiting current value Is
When being short-circuited fault, if short circuit current is less than selectivity limiting current value Is, the first magnetic tripping system 2 in major loop device 100, the second magnetic tripping system 7 can not move, thereby main current loop continues as the load supplying that occurs short trouble.Auxiliary magnetic tripping system 4 in subsidiary loop device 200 can detect short-circuit current, and promotes auxiliary contact 9 closures, and now auxiliary current loop is switched on and starts working.Under the power supply of electric pressure converter 12, short time delay element 13 can be realized certain time delay, can realize the short delay protection characteristic of the little short trouble of DC circuit breaker of the present invention.
If excised by subordinate's circuit breaker this section of delay time internal short-circuit fault, short time delay element 13 not output delay time timeout signal to assistant release 14, auxiliary magnetic tripping system 4 resets, therefore auxiliary contact 9 can again disconnect under action of reset spring, and DC circuit breaker restarts normal work.
If after the delay time of short time delay element 13, short trouble is not also eliminated, short time delay element 13 output delay time timeout signals are to assistant release 14, assistant release 14 can trigger auxiliary body 10 and thread off, and then auxiliary body 10 drives main machine frames 5 action of threading off, main machine frame 5 can drive the first main contact 3, the second main contact 8 to disconnect, short circuit current will be cut off, thoroughly cut off the electricity supply and have being connected between the load of overload fault, the impact of the short trouble of getting rid of load on distribution system.Only after unshorting fault, armrest moves the first main contact 3, second main contact 8 of closed this DC circuit breaker again.
(D) when load is short-circuited fault and short circuit current while being greater than selectivity limiting current value Is
When being short-circuited fault, if short circuit current is greater than selectivity limiting current value Is, at least one can detect short-circuit current the first magnetic tripping system 2 in major loop device 100, the second magnetic tripping system 7, and promote main machine frame 5 action of threading off, main machine frame 5 can disconnect the first main contact 3, the second main contact 8, and then cut off the electricity supply and have being connected between the load of overload fault, the impact of the overload fault of getting rid of load on distribution system.Only after unshorting fault, armrest moves the first main contact 3, second main contact 8 of closed this DC circuit breaker again.
When being short-circuited fault, if short circuit current is greater than selectivity limiting current value Is, auxiliary magnetic tripping system 4 in subsidiary loop device 200 also can detect short-circuit current, and promotes auxiliary contact 9 closures, and now auxiliary current loop is also switched on and starts working.Under the power supply of electric pressure converter 12, short time delay element 13 also can be realized certain time delay.
Also be, short circuit current when being short-circuited fault is greater than under the condition of selectivity limiting current value Is, the first main contact 3 of major loop device 100, the second main contact 8 are closed in short circuit zero hour, auxiliary magnetic tripping system 4 in subsidiary loop device 200 can detect short-circuit current, and promotes auxiliary contact 9 closures.But because the first magnetic tripping system 2, the second magnetic tripping system 7 of major loop device 100 can promote main machine frame 5 very soon; fast shut-off short-circuit current; its break-time is significantly shorter than the time of short time delay, so major loop device 100 does not need to wait for the overtime short circuit instantaneous protection characteristic of large short trouble that just realizes immediately of time delay of subsidiary loop device 200.
Fig. 2 is the structural principle schematic diagram of the selectivity DC circuit breaker of the second example embodiment according to the present invention.
As shown in Figure 2, according to the selectivity DC circuit breaker of the second example embodiment of the present invention and basic identical according to the structure of the selectivity DC circuit breaker of first case embodiment of the present invention.According to the selectivity DC circuit breaker of the second example embodiment of the present invention, select shunt 11 to carry out the short circuit current detection for the short-circuiting device of subsidiary loop device 200, shunt 11 has replaced auxiliary magnetic tripping system 4 and the auxiliary contact 9 in Fig. 1, shunt 11 is actual is exactly a resistor that resistance is very little, when DC load electric current passes through, at shunt 11 two ends, produce pressure drop, this voltage signal is input to short time delay element 13, when the voltage signal at shunt 11 two ends reaches certain threshold value, trigger the 13 trigger actions of short time delay element.According to the short time delay element in the selectivity DC circuit breaker of the second example embodiment of the present invention, can select chip microprocessor to realize; it can detect short-circuit current, realizes according to the short delay protection characteristic of the selectivity DC circuit breaker of the second example embodiment of the present invention by time delay a period of time.
According to the selectivity DC circuit breaker of the second example embodiment of the present invention, with identical according to the operation principle of the selectivity DC circuit breaker of the first example embodiment of the present invention, at this, seldom state.
According to selectivity DC circuit breaker of the present invention, by using magnetic release system, short-circuit current can be detected exactly, reliably, stably realize short time delay function.
Selectivity DC circuit breaker according to the present invention is simple in structure, compact, comprises major loop and subsidiary loop two parts.
Selectivity DC circuit breaker according to the present invention is by realize short time delay element by chip microprocessor, can supervisory circuit failure condition, control delay time, and guarantee the selectivity of the superior and the subordinate's circuit breaker.
Although illustrated and described the example embodiment of the present invention of considering, but it will be appreciated by those skilled in the art that, along with the progress of technology, can make various changes and revise and can replace its element and not deviate from true scope of the present invention with equivalent.
Claims (8)
1. the DC circuit breaker using in a direct-flow distribution system, comprise circuit breaker major loop device (100) and subsidiary loop device (200), circuit breaker major loop device (100) and subsidiary loop device (200) form two current circuits in parallel;
Major loop device (100) mainly comprises between the positive and negative electrode that is connected in series in successively DC power supply, the first release (1), the first magnetic tripping system (2), the first main contact (3), main machine frame (5), the second main contact (8), the second magnetic tripping system (7), second release (6) of formation main current loop; Described main machine frame (5) is controlled the closed of the first main contact (3) and the second main contact (8) or cuts off in the normal work of distribution system and overload fault situation;
Described DC circuit breaker, is characterized in that:
Subsidiary loop device (200) comprising:
Current detecting auxiliary triggering device (4,9; 11), be connected between the positive and negative electrode of DC power supply, detect the load short circuit current of DC circuit breaker, according to the load short circuit current value detecting, determine whether carrying out auxiliary triggering action;
Whether short time delay element (13), carry out of short duration time delay, and maintain and determine whether output delay time timeout signal according to the action of current detecting auxiliary triggering device when current detecting auxiliary triggering device carries out auxiliary triggering action;
Auxiliary body (10), for driving main machine frame (5) to carry out the corresponding action of threading off;
Assistant release (14), according to short time delay element (13), whether output delay time timeout signal moves, and triggers auxiliary body (10) and threads off.
2. DC circuit breaker as claimed in claim 1, is characterized in that subsidiary loop device (200) also comprises:
Electric pressure converter (12), is connected in parallel on the output of circuit breaker, and the direct voltage after output is changed is powered into short time delay element (13).
3. DC circuit breaker as claimed in claim 1, it is characterized in that current detecting auxiliary triggering device selects magnetic tripping system (4), auxiliary contact (9) to realize, wherein magnetic tripping system (4) is connected between the first main contact (3) and the circuit breaker load being connected below.
4. DC circuit breaker as claimed in claim 1, is characterized in that current detecting auxiliary triggering device selects shunt (11) to realize.
5. DC circuit breaker as claimed in claim 4, is characterized in that preferably, and the shunt (11) in current detecting auxiliary triggering device is connected between the first main contact (3) and the circuit breaker load being connected below.
6. DC circuit breaker as claimed in claim 1, is characterized in that
Described the first release (1), the second release (6) select bimetal leaf to realize.
7. DC circuit breaker as claimed in claim 1, is characterized in that
Short time delay element (13) selects RC delay circuit to realize.
8. DC circuit breaker as claimed in claim 1, is characterized in that
Short time delay element (13) selects chip microprocessor to realize.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910008980.9A CN101807497B (en) | 2009-02-17 | 2009-02-17 | Direct-current circuit breaker with selectivity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910008980.9A CN101807497B (en) | 2009-02-17 | 2009-02-17 | Direct-current circuit breaker with selectivity |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101807497A CN101807497A (en) | 2010-08-18 |
| CN101807497B true CN101807497B (en) | 2014-10-15 |
Family
ID=42609241
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910008980.9A Active CN101807497B (en) | 2009-02-17 | 2009-02-17 | Direct-current circuit breaker with selectivity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101807497B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102760620B (en) * | 2011-04-27 | 2016-03-02 | 施耐德电器工业公司 | For circuit breaker assistant release and adopt the circuit breaker of this assistant release |
| EP2768102B1 (en) * | 2013-02-13 | 2016-02-10 | General Electric Technology GmbH | Circuit interruption device |
| CN103474983B (en) * | 2013-08-20 | 2015-05-13 | 国家电网公司 | High voltage and great current direct-current circuit breaker and control method thereof |
| CN112582970A (en) * | 2020-12-14 | 2021-03-30 | 湖南顶立科技有限公司 | Graphite resistance furnace load short circuit processing method and system |
| CN113284773B (en) * | 2021-05-26 | 2022-12-20 | 上海电器科学研究所（集团）有限公司 | Switch with built-in current-limiting fuse |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1073744C (en) * | 1996-09-19 | 2001-10-24 | 富士电机株式会社 | Circuit breaker |
| CN1808666A (en) * | 2006-02-16 | 2006-07-26 | Tcl低压电器(无锡)有限公司 | Plastic-enclosed DC circuit breaker with three-stage protection function |
| CN2821850Y (en) * | 2005-09-19 | 2006-09-27 | 上海电器科学研究所（集团）有限公司 | Selective protective switch |
| CN2884216Y (en) * | 2006-02-20 | 2007-03-28 | 上海电器科学研究所（集团）有限公司 | Current testing device |
-
2009
- 2009-02-17 CN CN200910008980.9A patent/CN101807497B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1073744C (en) * | 1996-09-19 | 2001-10-24 | 富士电机株式会社 | Circuit breaker |
| CN2821850Y (en) * | 2005-09-19 | 2006-09-27 | 上海电器科学研究所（集团）有限公司 | Selective protective switch |
| CN1808666A (en) * | 2006-02-16 | 2006-07-26 | Tcl低压电器(无锡)有限公司 | Plastic-enclosed DC circuit breaker with three-stage protection function |
| CN2884216Y (en) * | 2006-02-20 | 2007-03-28 | 上海电器科学研究所（集团）有限公司 | Current testing device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101807497A (en) | 2010-08-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101653847B1 (en) | High-speed circuit breaker for a high-performance battery in an isolated direct current network | |
| US10483750B2 (en) | Selective circuit breaker | |
| US7911352B2 (en) | Method and apparatus for protection of AC-DC power converters | |
| US9450397B2 (en) | Circuit breaking arrangement | |
| EP2579425B1 (en) | Smooth switching device and method for double power supplies | |
| CN108028547B (en) | Power supply device and switch control method thereof | |
| CN101752148B (en) | Circuit breaker with selectivity | |
| CN101807497B (en) | Direct-current circuit breaker with selectivity | |
| CN103390879A (en) | Alternating current power supply input high voltage protection device | |
| US20230163626A1 (en) | Battery assembly and energy storage system | |
| WO2020233180A1 (en) | Current-limiting controllable lightning arrester, converter, power transmission system, and control method | |
| GB2518733A (en) | Neutral line breakage detection circuit, method and corresponding residual current circuit breaker | |
| JP2009181864A (en) | High voltage direct current circuit break support circuit and high voltage direct current breaker | |
| CN201549868U (en) | Low-voltage switch intelligent controller | |
| CN112103922B (en) | Power supply protection device, method and driver | |
| WO2013098906A1 (en) | Arc-discharge prevention circuit, and arc-discharge prevention device | |
| CN110970866A (en) | Contactor control device and power supply system | |
| CN201340826Y (en) | Circuit breaker with selectivity | |
| KR20150068310A (en) | Battery state monitoring circuit and battery device | |
| CN209963830U (en) | DC uninterrupted power system | |
| CN210577761U (en) | Open-circuit prevention device for current transformer | |
| CN102282736A (en) | Switch control circuit for power supply and power supplying circuit | |
| CN114128067A (en) | DC distribution board | |
| JP2015011933A (en) | Dc breaker | |
| JP2012253864A (en) | Breaking auxiliary device and power feeding system circuit breaker |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |