CN2234650Y - Vacuum load switch with quartz sand drop-down fuse - Google Patents

Vacuum load switch with quartz sand drop-down fuse Download PDF

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Publication number
CN2234650Y
CN2234650Y CN 95200857 CN95200857U CN2234650Y CN 2234650 Y CN2234650 Y CN 2234650Y CN 95200857 CN95200857 CN 95200857 CN 95200857 U CN95200857 U CN 95200857U CN 2234650 Y CN2234650 Y CN 2234650Y
Authority
CN
China
Prior art keywords
fuse
quartz sand
load switch
utility
model
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 - Fee Related
Application number
CN 95200857
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Chinese (zh)
Inventor
王季梅
孔繁虹
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.)
Xian Jiaotong University
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Xian Jiaotong University
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Xian Jiaotong University filed Critical Xian Jiaotong University
Priority to CN 95200857 priority Critical patent/CN2234650Y/en
Application granted granted Critical
Publication of CN2234650Y publication Critical patent/CN2234650Y/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model discloses a vacuum load switch with a quartz sand drop-down fuse in the technical field of high voltage electrical devices. The utility model is composed of two insulators which are vertically installed on a base plate, a quartz sand fuse which is matched between the two insulators, a mechanism box which is matched on the upper end of the upper insulator, and a vacuum arc extinguishing chamber which is arranged on the upper end of the mechanism box. The utility model has the advantages of simple structure, convenient operation, good breaking performance and long service life, and can widely be used for composing switches for protecting transformers in the electric power system.

Description

The vacuum load switch of band quartz sand fuse switch
The utility model belongs to high voltage electrical apparatus technical field, further belongs to the composition switch that a kind of protecting electrical power system transformer is used.
Present employed on-load switch has three major types: 1, air-generating on-load switch cost is low, and is simple in structure, but breaking capacity is low, poor reliability, and useful life is short, needs often maintenance.2, SF 6On-load switch, though the breaking capacity height, its cost is also high, the processing request strictness, maintenance difficult, of poor quality.3, vacuum load switch, the breaking capacity height, long service life, the reliability height, cost is reasonable.
The purpose of this utility model is the advantage that had not only overcome the defective of air-generating on-load switch but also brought into play vacuum load switch, adopt drop type quartz sand fuse to replace conventional injecting type generating tube, the curing quartz sand melt unit that can change voluntarily with a kind of user, improve the breaking capacity of switch, prolong its useful life, have break performance preferably.
Main technical schemes of the present utility model is: two insulators of vertical respectively installation on a base plate, dispose a mechanism case and an outlet terminal in the upper end of last insulator, mechanism case links to each other with quartz sand fuse upper end by contact, there is vacuum interrupter upper end at mechanism case, handle is equipped with in the fuse upper end, the fuse top is provided with release lever, there are an outlet terminal and fuse carriage in upper end at following insulator, have tumbler on the carriage, carriage links to each other with the axle of quartz sand fuse.
Adopt curing quartz sand melt of the present utility model to have following characteristics: melt replaces expensive fine silver with copper, solidify the copper melts in the quartz sand owing to be subjected to the sealing of quartz sand around it, can not be subjected to the oxidation of air, thus stablized fuse performance and improved useful life.Not only make its breaking capacity bring up to 40KA, have the one second characteristic of peace that matches with the transformer overload protection simultaneously from the 12.5KA of injecting type generating tube.Vacuum load switch cut-off circuit, bring up to 630A from the 100A of the on-load switch of conventional air-generating.The user can change melt voluntarily in addition, and is easy to use.
The utility model will be further described below in conjunction with accompanying drawing:
Accompanying drawing is a structural representation of the present utility model.
Last insulator 4 and following insulator 6 are vertically fixed on the upper and lower end of base plate 5 respectively by screw.Be furnished with mechanism case 2 on the last insulator 4, when fuse was threaded off, the spring that is provided with in the mechanism case 2 can quicken to promote the effect that fuse separates.One wiring pillar 3 also is housed on last insulator 4.The upper end of mechanism case 2 links to each other with vacuum interrupter 1, and vacuum interrupter 1 case surface sintering has semi-conducting glaze, can improve dielectric strength.Spring contact 13 also is housed on mechanism case 2, and it is connected with the port of fuse 10.Handle 11 is equipped with in the upper end of fuse 10, is used for separating brake, combined floodgate running current by arc control device.The top of fuse 10 links to each other with release lever 12, immediately the striker of its striker is backed down release lever 12 when the fuse short circuit breaking, makes fuse realize falling action.Upper end at following insulator 6 is fixed with carriage 8, has tumbler 7 on the carriage 8, on the carriage 8 wiring pillar 9 is housed also simultaneously, and carriage 8 links to each other with the axle of quartz sand fuse 10, and fuse 10 can rotate and hang upside down on carriage 8.
The utility model is when normal operating conditions, and vacuum load switch is a short circuit, has only fuse to put into operation, is promptly transshipped separately and short-circuit protection by fuse.When electric power system or transformer generation overload or short trouble, fuse is the disengagement failure electric current at first, its striker backs down release lever, make fuse fall motion to counter rotation rapidly, the arc control device of vacuum load switch also move immediately, open its contact, revolution is fallen and is formed obvious visible breaking gap.

Claims (1)

  1. The vacuum load switch of band quartz sand fuse switch, two insulators of vertical respectively installation on a base plate, it is characterized in that: dispose a mechanism case and an outlet terminal in the upper end of last insulator, mechanism case links to each other with quartz sand fuse upper end by contact, there is vacuum interrupter upper end at mechanism case, handle is equipped with in the fuse upper end, the fuse top is provided with release lever, there are an outlet terminal and fuse carriage in upper end at following insulator, have tumbler on the carriage, carriage links to each other with the axle of the disconnected device of quartz sand.
CN 95200857 1995-01-07 1995-01-07 Vacuum load switch with quartz sand drop-down fuse Expired - Fee Related CN2234650Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 95200857 CN2234650Y (en) 1995-01-07 1995-01-07 Vacuum load switch with quartz sand drop-down fuse

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 95200857 CN2234650Y (en) 1995-01-07 1995-01-07 Vacuum load switch with quartz sand drop-down fuse

Publications (1)

Publication Number Publication Date
CN2234650Y true CN2234650Y (en) 1996-09-04

Family

ID=33854472

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 95200857 Expired - Fee Related CN2234650Y (en) 1995-01-07 1995-01-07 Vacuum load switch with quartz sand drop-down fuse

Country Status (1)

Country Link
CN (1) CN2234650Y (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101816057B (en) * 2007-09-18 2013-03-06 沃纳电工系统两合股份有限公司 Fused load disconnector with double contact guard for variable connecting direction
CN103943433A (en) * 2014-04-29 2014-07-23 昆山达功电子有限公司 High voltage fuse

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101816057B (en) * 2007-09-18 2013-03-06 沃纳电工系统两合股份有限公司 Fused load disconnector with double contact guard for variable connecting direction
CN103943433A (en) * 2014-04-29 2014-07-23 昆山达功电子有限公司 High voltage fuse
CN103943433B (en) * 2014-04-29 2016-03-09 昆山达功电子有限公司 A kind of high-tension fuse

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C14 Grant of patent or utility model
GR01 Patent grant
C19 Lapse of patent right due to non-payment of the annual fee
CF01 Termination of patent right due to non-payment of annual fee