CN2694467Y - Outdoors duplex melting tube high-tension drop type fuse - Google Patents
Outdoors duplex melting tube high-tension drop type fuse Download PDFInfo
- Publication number
- CN2694467Y CN2694467Y CN 200420035843 CN200420035843U CN2694467Y CN 2694467 Y CN2694467 Y CN 2694467Y CN 200420035843 CN200420035843 CN 200420035843 CN 200420035843 U CN200420035843 U CN 200420035843U CN 2694467 Y CN2694467 Y CN 2694467Y
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- fusion tube
- tube
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- electric power
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Abstract
The utility model relates to an outdoors duplex melting tube high-tension drop type fuse, which belongs to electric power equipment and comprises an insulator on which a main fusion tube and a standby fusion tube which are connected in parallel are arranged, and a set of normally closed switches is arranged between the main fusion tube and the standby fusion tube. Because of the adoption of the two fusion tubes, the set of normally closed switches and two contact conducting systems, the defects of the permanent breaking of the fuse due to wrong drop because of mechanical failures or external factors and temporary malfunction disappearance, etc. can be avoided. The utility model has the advantages of compact conformation, reliable performance, easy installation and simple operation, and is suitable to be used in an electric power system with the alternate current of 50-60Hz, the rated operating voltage of 6, 10 and 35KV, and the rated operating current of 50-300 A to serve as an outdoor protecting device for the short circuit and overload of an electric power electric line and a transformer, and in addition, the utility model is also suitable for the opening and closing of a no-load power circuit, a no-load transformer and small rated load current.
Description
Technical field
The utility model relates to a kind of outdoor duplex melting tube high voltage drop-out type fuse cutout, belongs to power equipment.
Background technology
Present existing outdoor high-voltage drop type fuse model is various, but all be single fusion tube formula, and frequent existence is owing to mechanical breakdown or the extraneous factor mistake falls, provisional fault disappears and causes defectives such as fuse forever cut-offs, be not suitable for the higher place of power reguirements, particularly be not suitable for the requirement of uninterrupted power supply.
Summary of the invention
The purpose of this utility model just provides a kind of outdoor duplex melting tube high voltage drop-out type fuse cutout that overcomes defective in the prior art.
The technical solution of the utility model realizes by following approach, contains insulator, wherein on insulator, be provided with main fusion tube parallel with one another and be equipped with fusion tube, and at main fusion tube be equipped with between the fusion tube and be provided with one group of normally closed switch.
The utility model is owing to adopt two fusion tubes, one group of normally closed switch contacts conducting system and forms with two, can avoid causing defectives such as fuse forever cut-offs owing to mechanical breakdown or extraneous factor mistake falls, provisional fault disappears, have compact conformation, dependable performance, simple installation, characteristics simple to operate.Be applicable to and exchange 50-60Hz; rated operational voltage is 6,10,35KV; rated operational current is in the electric power system of 50-300A; short circuit and overload outdoor protection equipment as power transmission and distribution circuit, transformer use, and also are fit to disjunction and pass in addition and close unloaded power circuit, unloaded transformer and specified little load current use.
Description of drawings
Fig. 1 is a front view of the present utility model
Fig. 2 is a left view of the present utility model
Fig. 3 is an electrical connection diagram of the present utility model
Wherein: 1-insulator, 2-master's fusion tube, 3-are equipped with fusion tube, 4-thimble, 5-normally closed switch
Embodiment
Describe embodiment of the present utility model in detail below in conjunction with accompanying drawing.
The utility model contains insulator 1, and on insulator 1, be provided with main fusion tube parallel with one another 2 and be equipped with fusion tube 3, and at main fusion tube 2 be equipped with between the fusion tube 3 and be provided with one group of normally closed switch 5.
As Fig. 1, Fig. 2, Fig. 3, close main fusion tube 2 during use earlier, normally closed switch 5 disconnects, and closes fusion tube 3 fully again; Divide earlier during disjunction and be equipped with fusion tube 3, divide main fusion tube 2 again.
During operate as normal, fuse makes the turning joint locking of fusion tube and moving contact, under the hook effect of rain cover, makes main fusion tube 2 and be equipped with fusion tube 3 to be in closing position, and the thimble 4 of main simultaneously fusion tube 2 backs down normally closed switch 5, and making fully, fusion tube 3 is in off-state.
When circuit broke down electric current, the fuse failure of main fusion tube 2 produced electric arc in fusion tube, expulsion tube produces a large amount of gases under high arc temperature, going to make arc extinction under the liberation strongly when current over-zero, because fuse failure, movable then movable joint discharges, under the promotion and weight effect own of spring contact up and down, fusion tube falls rapidly, forms tangible external series gap, and thimble 4 discharges simultaneously, normally closed switch 5 rapid closings are equipped with fusion tube 3 and come into operation.
When protected circuit equipment was provisional fault (as thunder and lightning, animal, plant, fine wire short circuit), most faults can be after main fusion tube 2 disconnects, and was equipped with the fusion tube 3 preceding disappearance of coming into operation.
When protected circuit equipment is permanent fault; after main fusion tube 2 fell, fusion tube 3 fuse failures fully of conducting produced electric arc in fusion tube; expulsion tube produces a large amount of gases under the high arc temperature effect; going to make arc extinction under the liberation strongly when current over-zero, because fuse failure, turning joint discharges then; under the promotion and weight effect own of spring contact up and down; fusion tube falls rapidly, forms tangible external series gap, cuts off electric power system fault.
Because of overload, when main fusion tube 2 fell decompression, sub-load was excised automatically, had reduced the power system load amount, can keep normal operation after the fusion tube input fully.
Because mechanical breakdown or external force infringement when main fusion tube 2 mistakes fall, are equipped with fusion tube 3 and come into operation; When fusion tube 3 mistakes fell fully, main fusion tube 2 still kept power supply.
Claims (1)
1. outdoor duplex melting tube high voltage drop-out type fuse cutout, contain insulator (1), it is characterized in that described insulator (1) is provided with main fusion tube (2) parallel with one another and is equipped with fusion tube (3), and at main fusion tube (2) be provided with one group of normally closed switch (5) between the fusion tube (3) fully.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420035843 CN2694467Y (en) | 2004-05-13 | 2004-05-13 | Outdoors duplex melting tube high-tension drop type fuse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420035843 CN2694467Y (en) | 2004-05-13 | 2004-05-13 | Outdoors duplex melting tube high-tension drop type fuse |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2694467Y true CN2694467Y (en) | 2005-04-20 |
Family
ID=34773386
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420035843 Expired - Fee Related CN2694467Y (en) | 2004-05-13 | 2004-05-13 | Outdoors duplex melting tube high-tension drop type fuse |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2694467Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104752115A (en) * | 2015-04-24 | 2015-07-01 | 国网上海市电力公司 | Simple load disconnector used for PRW drop type fuse |
| CN106226649A (en) * | 2016-08-31 | 2016-12-14 | 山东卓尔电气有限公司 | Fuse switch on-line fault monitoring sensor |
| CN113782402A (en) * | 2021-07-31 | 2021-12-10 | 国网辽宁省电力有限公司电力科学研究院 | Drop-out fuse with load current cutting function and mounting method |
-
2004
- 2004-05-13 CN CN 200420035843 patent/CN2694467Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104752115A (en) * | 2015-04-24 | 2015-07-01 | 国网上海市电力公司 | Simple load disconnector used for PRW drop type fuse |
| CN106226649A (en) * | 2016-08-31 | 2016-12-14 | 山东卓尔电气有限公司 | Fuse switch on-line fault monitoring sensor |
| CN113782402A (en) * | 2021-07-31 | 2021-12-10 | 国网辽宁省电力有限公司电力科学研究院 | Drop-out fuse with load current cutting function and mounting method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 |