CN201490693U - Large-capacity high-speed current-limiting protection device - Google Patents

Large-capacity high-speed current-limiting protection device Download PDF

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Publication number
CN201490693U
CN201490693U CN2009201868336U CN200920186833U CN201490693U CN 201490693 U CN201490693 U CN 201490693U CN 2009201868336 U CN2009201868336 U CN 2009201868336U CN 200920186833 U CN200920186833 U CN 200920186833U CN 201490693 U CN201490693 U CN 201490693U
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CN
China
Prior art keywords
current
capacity
protection device
controller
limiting protection
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.)
Expired - Lifetime
Application number
CN2009201868336U
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Chinese (zh)
Inventor
王川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ANHUI HUIDIAN TECHNOLOGY Co Ltd
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ANHUI HUIDIAN TECHNOLOGY Co Ltd
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Filing date
Publication date
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Priority to CN2009201868336U priority Critical patent/CN201490693U/en
Application granted granted Critical
Publication of CN201490693U publication Critical patent/CN201490693U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

The utility model relates to a large-capacity high-speed current-limiting protection device comprising a current transformer, also comprising a controller, a large-capacity circuit breaker, a nonlinear resistor and a high-voltage current-limiting fuse, wherein the current transformer is connected with the controller in series; the controller is connected with the large-capacity circuit breaker; and the large-capacity circuit breaker is connected with the nonlinear resistor and the high-voltage current-limiting fuse in parallel. The large-capacity high-speed current-limiting protection device can avoid the short-circuit accident when the breaking capacity of the switch is not enough in short-circuit current so as to be applicable to the short-circuit protection under the condition of higher rated current.

Description

A kind of high-capacity and high-speed current-limiting protection device
Technical field
The utility model relates to a kind of when being short-circuited fault near the generator outlet end or the port of export, in time generating set and miscellaneous equipment is implemented to cut-off the switching device of protection.
Background technology
For near the short trouble that occurs in the generator outlet end, because short circuit current is very big, be about 7 times of the rated current of generator, must cut-off the fault point immediately, to avoid generating set and miscellaneous equipment impaired.At present, in China, conventional switch receive that fault-signal, contact are opened, arcing is so that the whole process of blow-out, what switch cut-off only is the short-circuit current value that approaches steady-state current, and the maximum of short circuit current has flow through from generator, and this has very big electric power and thermal effect effect to generator.For guaranteeing electrical reliability, switch does bulkyly that generator is in order to tolerate certain short circuit current to guarantee that enough dynamic thermal stabilities are arranged, and parameters such as its winding cross section all should have certain nargin mutually, and this has just increased equipment cost greatly.Therefore, though this mode can be cut-off short circuit current, protected mode is not highly effective, and often the accident of being short-circuited causes motor and electric equipment to burn out accident, gives generating and causes heavy economic losses with electric unit.
The utility model content
The purpose of this utility model is when the switch connecting-disconnecting function is not enough when being short-circuited electric current at existing switch, to be the high-capacity and high-speed current-limiting protection device of avoiding the accident of being short-circuited to provide, to be applicable to the short-circuit protection that is applied under the higher occasion of rated current.
The utility model is achieved through the following technical solutions:
A kind of high-capacity and high-speed current-limiting protection device includes current transformer, also includes controller, large capcity breaker, nonlinear resistance and high-voltage and current-limitation fuse and forms; Described current transformer is connected with controller, and controller connects with large capcity breaker, and large capcity breaker is in parallel with nonlinear resistance and high-voltage and current-limitation fuse.
A kind of high-capacity and high-speed current-limiting protection device, described large capcity breaker are the explosive bridge pontic;
A kind of high-capacity and high-speed current-limiting protection device, described nonlinear resistance are znr.
A kind of high-capacity and high-speed current-limiting protection device, described explosive bridge pontic are the electric conductor of charged detonator; The charged detonator of described controller and explosive bridge pontic links.
The utility model is by using the common parallel connection of explosive bridge, high-voltage and current-limitation fuse and znr, under the normal condition, explosive bridge is as the fuse shunt circuit, the electric current that wherein flows through can be to flow through tens times of electric current in the fuse, and high-voltage and current-limitation fuse still remains less load current value.When in case the generator outlet end is short-circuited, the controller measuring system is by measuring current increases speed and current instantaneous value in advance to judge, open a way after making the explosive bridge instantaneous explosion, huge short circuit current all injects high-voltage and current-limitation fuse makes its fusing, the overvoltage of fusing moment generation makes the znr conducting, and most energy are also absorbed by znr simultaneously.The capacity that the utility model has the advantages that is big, rapid discrimination technology, quick-speed turning on-off technology and stopped flow technique, reliable rapidly, can be widely used in solving the short trouble of generator outlet end, also can be applicable in the upgrading urban and rural power grids, the short trouble of a certain electrical network during the electrical network parallel running.
Description of drawings
Fig. 1 is the apparatus structure schematic diagram.
Fig. 2 is embodiment 1 an apparatus structure schematic diagram.
Fig. 3 is embodiment 2 apparatus structure schematic diagrames.
Embodiment
Embodiment 1
Shown in accompanying drawing 1,2.
The utility model includes current transformer 1, and controller 2, explosive bridge pontic 3, znr 4 and high-voltage and current-limitation fuse 5 are formed; Explosive bridge pontic 3 is the electric conductor of charged detonator, and current transformer 1 is connected with controller 2, and controller 2 connects with the charged detonator of explosive bridge pontic 3, and explosive bridge pontic 3 is in parallel with znr 4 and high-voltage and current-limitation fuse 5.The other end connecting generator 6 of current transformer 1, znr 4 connects with transformer 7.When in case generator 6 ports of export are short-circuited, controller 2 measuring systems are by measuring current increases speed and current instantaneous value in advance to judge, open a way after making explosive bridge 3 instantaneous explosions, huge short circuit current all injects high-voltage and current-limitation fuse 5 makes its fusing, the overvoltage of fusing moment generation makes znr 4 conductings, and most energy are also absorbed by znr 4 simultaneously.
Embodiment 2
Shown in accompanying drawing 3.
The other end electrical network 1 of current transformer, znr 4 connects with electrical network 2.Electrical network 2 and electrical network 1 parallel running.All the other are with embodiment 1.
When in case electrical network 1 port of export is short-circuited, controller 2 measuring systems are by measuring current increases speed and current instantaneous value in advance to judge, open a way after making explosive bridge 3 instantaneous explosions, huge short circuit current all injects high-voltage and current-limitation fuse 5 makes its fusing, the overvoltage of fusing moment generation makes znr 4 conductings, and most energy are also absorbed by znr 4 simultaneously.

Claims (4)

1. a high-capacity and high-speed current-limiting protection device includes current transformer, it is characterized in that also including controller, large capcity breaker, nonlinear resistance and high-voltage and current-limitation fuse and forms; Described current transformer is connected with controller, and controller connects with large capcity breaker, and large capcity breaker is in parallel with nonlinear resistance and high-voltage and current-limitation fuse.
2. a kind of high-capacity and high-speed current-limiting protection device according to claim 1 is characterized in that described large capcity breaker is the explosive bridge pontic.
3. a kind of high-capacity and high-speed current-limiting protection device according to claim 1 is characterized in that described nonlinear resistance is a znr.
4. a kind of high-capacity and high-speed current-limiting protection device according to claim 2 is characterized in that described explosive bridge pontic is the electric conductor of charged detonator; The charged detonator of described controller and explosive bridge pontic links.
CN2009201868336U 2009-08-06 2009-08-06 Large-capacity high-speed current-limiting protection device Expired - Lifetime CN201490693U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2009201868336U CN201490693U (en) 2009-08-06 2009-08-06 Large-capacity high-speed current-limiting protection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2009201868336U CN201490693U (en) 2009-08-06 2009-08-06 Large-capacity high-speed current-limiting protection device

Publications (1)

Publication Number Publication Date
CN201490693U true CN201490693U (en) 2010-05-26

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN2009201868336U Expired - Lifetime CN201490693U (en) 2009-08-06 2009-08-06 Large-capacity high-speed current-limiting protection device

Country Status (1)

Country Link
CN (1) CN201490693U (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102545141A (en) * 2012-01-11 2012-07-04 中国科学院电工研究所 High-temperature superconductivity current limiting fuse
CN102931648A (en) * 2012-11-20 2013-02-13 合肥贝阿益电力设备有限公司 Bus residual voltage holding device
CN103825530A (en) * 2014-03-07 2014-05-28 华中科技大学 Superconducting motor system and application thereof
CN106921149A (en) * 2017-03-10 2017-07-04 安徽尚途电力保护设备有限公司 A kind of FSR high capacity and high speed switchgearses

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102545141A (en) * 2012-01-11 2012-07-04 中国科学院电工研究所 High-temperature superconductivity current limiting fuse
CN102931648A (en) * 2012-11-20 2013-02-13 合肥贝阿益电力设备有限公司 Bus residual voltage holding device
CN103825530A (en) * 2014-03-07 2014-05-28 华中科技大学 Superconducting motor system and application thereof
CN106921149A (en) * 2017-03-10 2017-07-04 安徽尚途电力保护设备有限公司 A kind of FSR high capacity and high speed switchgearses

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Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
PE01 Entry into force of the registration of the contract for pledge of patent right

Denomination of utility model: Large-capacity high-speed current-limiting protection device

Effective date of registration: 20160629

Granted publication date: 20100526

Pledgee: Hefei high tech Company limited by guarantee

Pledgor: Anhui Huidian Technology Co., Ltd.

Registration number: 2016340000032

PLDC Enforcement, change and cancellation of contracts on pledge of patent right or utility model
PC01 Cancellation of the registration of the contract for pledge of patent right

Date of cancellation: 20170619

Granted publication date: 20100526

Pledgee: Hefei high tech Company limited by guarantee

Pledgor: Anhui Huidian Technology Co., Ltd.

Registration number: 2016340000032

PC01 Cancellation of the registration of the contract for pledge of patent right
CX01 Expiry of patent term

Granted publication date: 20100526

CX01 Expiry of patent term