CN103281015A - Novel F-C loop configuration circuit - Google Patents
Novel F-C loop configuration circuit Download PDFInfo
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- CN103281015A CN103281015A CN2013102148117A CN201310214811A CN103281015A CN 103281015 A CN103281015 A CN 103281015A CN 2013102148117 A CN2013102148117 A CN 2013102148117A CN 201310214811 A CN201310214811 A CN 201310214811A CN 103281015 A CN103281015 A CN 103281015A
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- grounding switch
- fuse
- contactor
- speed grounding
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Abstract
The invention provides a novel F-C configuration circuit, and relates to the field of a motor starting circuit. The novel F-C configuration circuit is used for starting an electromotor needed to be frequently started. The problems that the service life of an expensive contactor is greatly shortened caused by the fact that a contactor probably existing in a traditional F-C loop is prior to fuse movement are solved. The novel F-C configuration circuit comprises a fuse, the contactor, a current transformer, a lightning arrester and a high-speed grounding switch. One end of the fuse is connected with a power supply, the other end of the fuse is sequentially connected with the contactor, the current transformer and the electromotor in series, one end of the lightning arrester is connected with the ground, the other end of the lightning arrester is connected with the current output end of the current transformer, one end of the high-speed grounding switch is connected with the ground, and the other end of the high-speed grounding switch is connected with the current output end of the current transformer. At the premise that safety and reliability of a power supply loop are not reduced, equipment replacement and maintenance cost is greatly reduced, and the application range of the F-C loop is expanded.
Description
Technical field
The present invention relates to a kind of electric motor starting circuit, especially relate to a kind of novel F-C loop configuration circuit.
Background technology
In engineering practice, (but vacuum contactor-fuse combined electric apparatus is to utilize to cut-off on a large scale that the high-tension fuse of short circuit current cooperates with the vacuum contactor of frequent operation in the F-C loop, be applied to generating, petrochemical industry, the electric drive system of industry such as metallurgy, starting device as the motor of Fraquent start, therefore be also referred to as combined starter, be called for short the F-C loop) generally be used for rated power smaller or equal to 1000kW and start-up time short electric motor loop, and rated power is less than long electric motor loop of 630kW and starting time, and vacuum circuit-breaker is adopted in other loop.Its reason is as follows:
To be used for rated power long greater than 630kW and starting time when the F-C loop, or rated power is during greater than the electric motor loop of 1000kW, and contactor and fuse are more approaching operate time, contactor may occur and have precedence over fuse and move.And because contactor is expensive, about about 40,000 yuan one, cut-off arcing etc. frequently to cause it to damage easily, can cause the reduction greatly in contactor life-span; And the fuse low price is only had an appointment about 200 to 300 yuan.Allowing fuse have precedence over the action of contactor elder generation can protect contactor to avoid damaging.Therefore fuse with become very difficult cooperating of contactor, and this has also limited the scope of application in F-C loop.
Summary of the invention
The objective of the invention is to: at the problem of prior art existence, providing a kind of can guarantee under the prerequisite that current supply circuit fail safe, reliability do not reduce, reduce the expense of equipment replacement and maintenance greatly, and enlarged the F-C loop configuration circuit of the scope of application in F-C loop.
Purpose of the present invention is achieved through the following technical solutions:
A kind of novel F-C loop configuration circuit, startup for the motor that needs frequent starting, it is characterized in that, this circuit comprises fuse, contactor, current transformer, lightning arrester and high speed grounding switch, one end of described fuse connects power supply, the other end of fuse is series contactor, current transformer and motor successively, one end ground connection of described lightning arrester, the other end of lightning arrester is connected the current output terminal of current transformer, one end ground connection of described high speed grounding switch, the other end of high speed grounding switch is connected the current output terminal of current transformer.
Preferably, described high speed grounding switch is that the switch motion time is less than the high speed grounding switch of 0.06s.
Preferably, described high speed grounding switch is the switch motion time less than the high speed grounding switch of relaying protection operate time of contactor.
Preferably, described configuration circuit comprises that also this cable is that cross section is at 50mm for the cable that connects above-mentioned each components and parts
2~ 100 mm
2Between cable.
Compared with prior art, the present invention has the following advantages:
1, can reduce the expense of equipment replacement and maintenance greatly, and enlarge the scope of application in F-C loop, and because F-C circuit switching cabinet price only is about 2/3 of vacuum circuit-breaker loop, can save the Medium Voltage Switchgear investment greatly.
2, when adopting this F-C loop, the return cable smallest cross-sectional can adopt 50mm
2, and the smallest cross-sectional of vacuum circuit-breaker return cable is generally 120mm
2(the horizontal 40kA of short circuit) and 185mm
2(the horizontal 50kA of short circuit), therefore, after adopting this F-C loop to substitute the vacuum circuit-breaker loop, corresponding cable type selecting can reduce the cross-section of cable, and the cable investment also can reduce greatly.
3, adopt this novel F-C loop to arrange after, guaranteeing under the prerequisite that current supply circuit fail safe, reliability do not reduce the economy of operation maintenance to be greatly improved.
Description of drawings
Fig. 1 is circuit diagram of the present invention.
?
Embodiment
The present invention is described in detail below in conjunction with the drawings and specific embodiments.
Embodiment
F-C loop configuration circuit is mainly used in needing the startup of the motor of frequent starting.As shown in Figure 1, the present invention changes the earthed switch in traditional F-C loop into high speed grounding switch, when the loop overcurrent occurs and needs the open failure loop, can adopt initiatively closed high speed grounding switch measure, the little short circuit current that the terminal short circuit in loop or nonmetal character short circuit are caused becomes big short circuit current fast, and then cause the quick fuse of fuse, realize cut-offfing of fault loop.Circuit of the present invention comprises fuse 1, contactor 2, current transformer 3, lightning arrester 4 and high speed grounding switch 5.One end of fuse 1 connects power supply, can be arranged to power supply head grafting form between fuse 1 and power supply; The other end of fuse 1 is series contactor 2, current transformer 3 and motor 4 successively, also can be arranged to power supply head grafting form between contactor 2 summation current transformers 3.One end ground connection of lightning arrester 4, the other end of lightning arrester 4 is connected the current output terminal of current transformer 3.One end ground connection of high speed grounding switch 5, the other end of high speed grounding switch 5 is connected the current output terminal of current transformer 3.
Cooperating operate time; because it is 0.06s that general integrated protection does not have current quick operate time in time limit; contactor opening time is greater than 0.02s, and during big short circuit current the fusing time of fuse less than 0.02s, so the operate time of high speed grounding switch should be less than 0.06s.Therefore high speed grounding switch of the present invention can select for use the switch motion time less than the high speed grounding switch of 0.06s, also can select the high speed grounding switch of switch motion time less than relaying protection operate time of contactor for use.
After adopting this circuit, can reduce the expense of equipment replacement and maintenance greatly.And enlarged the scope of application in F-C loop.Because F-C circuit switching cabinet price only is about 2/3 of vacuum circuit-breaker loop, can save the Medium Voltage Switchgear investment greatly.
In addition, when adopting the F-C loop, the return cable smallest cross-sectional can adopt 50mm
2, and the smallest cross-sectional of vacuum circuit-breaker return cable is generally 120mm
2(the horizontal 40kA of short circuit) and 185mm
2(the horizontal 50kA of short circuit).Therefore, after adopting the F-C loop to substitute the vacuum circuit-breaker loop, corresponding cable type selecting can reduce the cross-section of cable, and the cable investment also can reduce greatly.
Moreover, adopt this novel F-C loop to arrange after, guaranteeing under the prerequisite that current supply circuit fail safe, reliability do not reduce the economy of operation maintenance to be greatly improved.
The above only is preferred embodiment of the present invention, not in order to limit the present invention, should be pointed out that all any modifications of doing within the spirit and principles in the present invention, is equal to replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. novel F-C loop configuration circuit, startup for the motor that needs frequent starting, it is characterized in that, this circuit comprises fuse, contactor, current transformer, lightning arrester and high speed grounding switch, one end of described fuse connects power supply, the other end of fuse is series contactor successively, current transformer and motor, one end ground connection of described lightning arrester, the other end of lightning arrester is connected the current output terminal of current transformer, one end ground connection of described high speed grounding switch, the other end of high speed grounding switch is connected the current output terminal of current transformer.
2. a kind of novel F-C loop configuration circuit according to claim 1 is characterized in that described high speed grounding switch is that the switch motion time is less than the high speed grounding switch of 0.06s.
3. a kind of novel F-C loop configuration circuit according to claim 1 is characterized in that, described high speed grounding switch is the switch motion time less than the high speed grounding switch of relaying protection operate time of contactor.
4. a kind of novel F-C loop configuration circuit according to claim 1 is characterized in that, described configuration circuit comprises that also this cable is that cross section is at 50mm for the cable that connects above-mentioned each components and parts
2~ 100 mm
2Between cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310214811.7A CN103281015B (en) | 2013-05-31 | 2013-05-31 | A kind of novel F-C loop configuration circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310214811.7A CN103281015B (en) | 2013-05-31 | 2013-05-31 | A kind of novel F-C loop configuration circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103281015A true CN103281015A (en) | 2013-09-04 |
| CN103281015B CN103281015B (en) | 2015-09-30 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310214811.7A Active CN103281015B (en) | 2013-05-31 | 2013-05-31 | A kind of novel F-C loop configuration circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108758501A (en) * | 2018-05-06 | 2018-11-06 | 蒋培 | One kind being convenient for fixed LED illumination lamp device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1061625A1 (en) * | 1999-06-17 | 2000-12-20 | Abb Research Ltd. | A monitor circuit for a current limiting device |
| CN201430438Y (en) * | 2009-03-27 | 2010-03-24 | 淮南矿业(集团)有限责任公司 | Arc-extinguishing device |
| US20120043922A1 (en) * | 2010-08-23 | 2012-02-23 | Schlumberger Technology Corporation | Variable Freqency Drive with Dielectric Fluid-Immersed Transformer |
| CN202860680U (en) * | 2012-10-30 | 2013-04-10 | 沈阳隆基电磁科技股份有限公司 | Control device of mining flameproof permanent magnet de-ironing separator |
| CN202957581U (en) * | 2012-12-14 | 2013-05-29 | 新疆希望电子有限公司 | Default phase protection device for motor |
| CN203278708U (en) * | 2013-05-31 | 2013-11-06 | 中国电力工程顾问集团西南电力设计院 | Novel F-C loop configuration circuit |
-
2013
- 2013-05-31 CN CN201310214811.7A patent/CN103281015B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1061625A1 (en) * | 1999-06-17 | 2000-12-20 | Abb Research Ltd. | A monitor circuit for a current limiting device |
| CN201430438Y (en) * | 2009-03-27 | 2010-03-24 | 淮南矿业(集团)有限责任公司 | Arc-extinguishing device |
| US20120043922A1 (en) * | 2010-08-23 | 2012-02-23 | Schlumberger Technology Corporation | Variable Freqency Drive with Dielectric Fluid-Immersed Transformer |
| CN202860680U (en) * | 2012-10-30 | 2013-04-10 | 沈阳隆基电磁科技股份有限公司 | Control device of mining flameproof permanent magnet de-ironing separator |
| CN202957581U (en) * | 2012-12-14 | 2013-05-29 | 新疆希望电子有限公司 | Default phase protection device for motor |
| CN203278708U (en) * | 2013-05-31 | 2013-11-06 | 中国电力工程顾问集团西南电力设计院 | Novel F-C loop configuration circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108758501A (en) * | 2018-05-06 | 2018-11-06 | 蒋培 | One kind being convenient for fixed LED illumination lamp device |
| CN108758501B (en) * | 2018-05-06 | 2020-08-28 | 江苏般若电子工业有限公司 | LED lighting lamp device convenient to fix |
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| Publication number | Publication date |
|---|---|
| CN103281015B (en) | 2015-09-30 |
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Address after: 610021 Dongfeng Road, Chengdu, Sichuan, No. 18, No. Applicant after: China Power Engineering Consulting Group Southwest Electric Power Design Institute Co., Ltd. Address before: 610021 Dongfeng Road, Chengdu, Sichuan, No. 18, No. Applicant before: Southwest Electric Power Design Institute of China Power Engineering Consulting Group Corporation |
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Free format text: CORRECT: APPLICANT; FROM: SOUTHWEST ELECTRIC POWER DESIGN INSTITUTE OF CHINA POWER ENGINEERING CONSULTING GROUP CORPORATION TO: CHINA POWER ENGINEERING CONSULTING GROUP SOUTHWEST ELECTRIC POWER DESIGN INSTITUTE CO., LTD. |
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