CN104681348A - Burnout-preventing enhanced low-voltage isolation switch of power distribution transformer - Google Patents
Burnout-preventing enhanced low-voltage isolation switch of power distribution transformer Download PDFInfo
- Publication number
- CN104681348A CN104681348A CN201510127190.8A CN201510127190A CN104681348A CN 104681348 A CN104681348 A CN 104681348A CN 201510127190 A CN201510127190 A CN 201510127190A CN 104681348 A CN104681348 A CN 104681348A
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- CN
- China
- Prior art keywords
- isolation switch
- voltage isolation
- burnout
- transformer
- switch
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- 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.)
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
- H01H31/02—Details
- H01H31/12—Adaptation for built-in fuse
- H01H31/122—Fuses mounted on, or constituting the movable contact parts of, the switch
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- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The invention relates to a transformer isolation switch, in particular to a burnout-preventing enhanced low-voltage isolation switch of a power distribution transformer. An existing DW type low-voltage isolation switch body is adopted for modification, an RTO type fuse tube is adopted as a safety piece, the switch body is connected with the safety piece through a dual-break contact, and spring pieces are added outside breaks. The application of the burnout-preventing enhanced low-voltage isolation switch prolongs the operation cycle of original equipment, greatly reduces the operation and maintenance costs of the equipment, effectively eliminates an oxidation fault of a secondary isolation switch of an original 10 kV transformer, reduces the power failure frequency of the transformer, reduces the frequency of repair required by users, and reduces the workload of repair personnel; the burnout-preventing enhanced low-voltage isolation switch is simple in structure, high in practicality, safe and reliable, solves an actual problem of the 10 kV distribution transformer in equipment operation, and has very high promotion and application values.
Description
technical field:
The present invention relates to a kind of transformer isolation switch, particularly relate to a kind of overfiring-proof enhancement mode low-voltage isolating switch of distribution transformer.
background technology:
Existing low voltage isolation switch fuse all adopts aluminium safety plate, and Switch main body material is copper, and both adopt screw shimming to compress connection.Due to coastal area, in air, saline and alkaline density is large, has higher corrosivity to metal, make change platform secondary isolation switch security sheet and secondary isolation make and break contact very easily copper aluminum oxidation, cause loose contact, therefore become platform fault outage and report rate for repairment and can be in any more, had a strong impact on power supply reliability.Statistical history data, what distribution repairing class of power supply branch of Donggang City received every year reports fault for repairment average more than 1500 times, wherein effectively report about 700 times for repairment, and become platform report for repairment occupy imitate report for repairment about 60%, and in change platform reports for repairment, have 85% to cause because low voltage isolation switch safety plate is oxidized loose contact, frequent owing to reporting number of times for repairment, repairman is the requirement reaching service promise, all day comes and goes everywhere on the road of maintenance, the working strength of every day is very large, for present situation, we feel that 10kV distribution becomes device platform low voltage isolation switch fusing point and must transform, must change can not, in the urgent need under existence conditions, effective solution low voltage isolation switch fusing point problem of oxidation.
summary of the invention:
for solving above-mentioned deficiency of the prior art, the present invention discloses a kind of overfiring-proof enhancement mode low-voltage isolating switch of distribution transformer, and object is that solving coastal area affects by air ambient, easily produces the problem of low voltage isolation switch fusing point oxidation.
The present invention is realized by following technological means:
Overfiring-proof enhancement mode low-voltage isolating switch of distribution transformer, is characterized in that the DW type low voltage isolation switch body adopting existing military service, adopts RTO type cartridge fuse to be safety plate, and Switch main body and safety plate pass through double-fracture contact, the additional spring leaf of incision position.
Advantage of the present invention and beneficial effect are: the present invention is on the basis of existing change platform secondary isolation switch, retain its operation principle, improvement safety plate and secondary isolation switch contact divide, change Solder for Al-Cu Joint Welding contact for copper-copper contact, adopt melt of good performance to replace original aluminium fuse piece, reduce and cause isolating switch switch scaling loss and change platform to have a power failure because of copper aluminum oxidation.Change former screw pressing single contact, be copper spring leaf double-fracture, add isolating switch reliability of operation, increase the service life.Application of the present invention, improves the cycle of operation of existing equipment, significantly reduces equipment operation and maintenance cost; Effectively solve former 10kV and become platform secondary isolation switch oxidation fault, decrease and become platform frequency of power cut, reduce user and report number of times for repairment, alleviate the workload of maintenance personal; Structure of the present invention is simple, practical, safe and reliable, solves 10kV distribution transformer in the operating practical problem of equipment, has very strong application value.
accompanying drawing illustrates:
Fig. 1 is structural representation of the present invention.
In figure: 1, low voltage isolation switch body, 2, RTO type cartridge fuse, 3, switch fracture
embodiment:
embodiment:
Overfiring-proof enhancement mode low-voltage isolating switch of distribution transformer, it is characterized in that the DW type low voltage isolation switch body 1 adopting existing military service, adopt RTO type cartridge fuse 2 to be safety plate, Switch main body is connected by switch fracture 3 with safety plate, fracture adopts double-fracture contact, the additional spring leaf of incision position.
Apply the present invention to power supply branch of Donggang City of electric company, Dandong, Liaoning Province carry out transforming secondary isolation switch in 5 Ge Tai districts.
Know-why:
This difficult point improved is at melt and low voltage isolation switch contact junction surface, DW type low voltage isolation switch size according to existing military service has selected RTO type cartridge fuse (see figure), substitute original aluminium safety plate, RTO type cartridge fuse terminal is copper, body is porcelain knob good seal performance, avoid fuse to contact with air, effectively reduce oxidization time. and according to the structure of the copper terminal of RTO type cartridge fuse, change low voltage isolation switch single contact for two copper fracture, add isolating switch reliability of operation, increase the service life, fracture is additional shoots reed, its cartridge fuse terminal is closely engaged, it is overheated to prevent, effectively solve copper aluminum oxidation problem.This design is applicable to 10kV transformer secondary low voltage isolation switch, is effective substitute products of the DW type low voltage isolation switch of existing military service, can change melt, former switch pedestal can be utilized to carry out large area transformation according to the amount of capacity of transformer.
Technical characterstic:
1, Switch main body: adopt former DW type low voltage isolation switch body, reduces improvement cost.
2, switch fracture: change former screw pressing single contact, is copper spring leaf double-fracture, adds isolating switch reliability of operation, increase the service life.
3, melt: selected RTO type cartridge fuse to replace original aluminium safety plate.
By transformation, simultaneously to secondary isolation switch monitoring, the thermometric after improving, no abnormal situation, through its effect compared with history same period, failure rate reduces greatly, improves power supply reliability.
The application of this achievement, improves the cycle of operation of existing equipment, significantly reduces equipment operation and maintenance cost; Every year can cost saving 6000 yuan according to branch company of reckoning Donggang City
,during power supply reliability loss reduction by 80 family.
The application of this achievement, effectively solves former 10kV and becomes platform secondary isolation switch oxidation fault, decrease and become platform frequency of power cut, reduce user and report number of times for repairment, alleviate the workload of maintenance personal;
By the application of this achievement, improve urban electricity supply reliability, effectively raise the image of enterprise, cash the promise of enterprise to society.
This one-tenth fruit structure is simple, practical, safe and reliable, solves 10kV distribution transformer in the operating practical problem of equipment, has very strong application value.
Claims (1)
1. overfiring-proof enhancement mode low-voltage isolating switch of distribution transformer, is characterized in that the DW type low voltage isolation switch body adopting existing military service is transformed, and adopts RTO type cartridge fuse to be safety plate, and Switch main body and safety plate pass through double-fracture contact, the additional spring leaf of incision position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510127190.8A CN104681348A (en) | 2015-03-23 | 2015-03-23 | Burnout-preventing enhanced low-voltage isolation switch of power distribution transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510127190.8A CN104681348A (en) | 2015-03-23 | 2015-03-23 | Burnout-preventing enhanced low-voltage isolation switch of power distribution transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104681348A true CN104681348A (en) | 2015-06-03 |
Family
ID=53316257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510127190.8A Pending CN104681348A (en) | 2015-03-23 | 2015-03-23 | Burnout-preventing enhanced low-voltage isolation switch of power distribution transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104681348A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201038102Y (en) * | 2007-03-22 | 2008-03-19 | 余谋幸 | Three-phase linkage drop-off type fuse |
| US20100230263A1 (en) * | 2007-07-26 | 2010-09-16 | Abb Research Ltd. | Cutouts with automatic reclosing |
| CN201708443U (en) * | 2010-05-18 | 2011-01-12 | 山东泰开箱变有限公司 | PT cabinet for railway 10kV power distribution |
| CN204497126U (en) * | 2015-03-23 | 2015-07-22 | 国网辽宁省电力有限公司丹东供电公司 | Overfiring-proof enhancement mode low-voltage isolating switch of distribution transformer |
-
2015
- 2015-03-23 CN CN201510127190.8A patent/CN104681348A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201038102Y (en) * | 2007-03-22 | 2008-03-19 | 余谋幸 | Three-phase linkage drop-off type fuse |
| US20100230263A1 (en) * | 2007-07-26 | 2010-09-16 | Abb Research Ltd. | Cutouts with automatic reclosing |
| CN201708443U (en) * | 2010-05-18 | 2011-01-12 | 山东泰开箱变有限公司 | PT cabinet for railway 10kV power distribution |
| CN204497126U (en) * | 2015-03-23 | 2015-07-22 | 国网辽宁省电力有限公司丹东供电公司 | Overfiring-proof enhancement mode low-voltage isolating switch of distribution transformer |
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Legal Events
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150603 |
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| RJ01 | Rejection of invention patent application after publication |