CN112951680A - Structure for improving rated current capacity of vacuum fuse based on double-gap structure - Google Patents
Structure for improving rated current capacity of vacuum fuse based on double-gap structure Download PDFInfo
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- CN112951680A CN112951680A CN202110211666.1A CN202110211666A CN112951680A CN 112951680 A CN112951680 A CN 112951680A CN 202110211666 A CN202110211666 A CN 202110211666A CN 112951680 A CN112951680 A CN 112951680A
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- vacuum
- gap
- fuse
- oxygen
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
- H01H85/041—Fuses, i.e. expendable parts of the protective device, e.g. cartridges characterised by the type
- H01H85/047—Vacuum fuses
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
- H01H85/05—Component parts thereof
- H01H85/055—Fusible members
- H01H85/12—Two or more separate fusible members in parallel
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- Fuses (AREA)
Abstract
The invention discloses a structure for improving the rated current capacity of a vacuum fuse based on a double-gap structure, which comprises a fuse shell, wherein a first oxygen-free copper vacuum electrode is arranged at an opening at the top of the fuse shell, a second oxygen-free copper vacuum electrode is arranged at an opening at the bottom of the fuse shell, a short vacuum gap and a long vacuum gap are separated in the fuse shell, a short melt is arranged in the short vacuum gap, a long melt is arranged in the long vacuum gap, two ends of the short melt are respectively connected with the first oxygen-free copper vacuum electrode and the second oxygen-free copper vacuum electrode, two ends of the long melt are respectively connected with the first oxygen-free copper vacuum electrode and the second oxygen-free copper vacuum electrode, and the rated current capacity of the structure is higher.
Description
Technical Field
The invention belongs to the technical field of vacuum fuses, and relates to a structure for improving rated current capacity of a vacuum fuse based on a double-gap structure.
Background
In the design of the vacuum fuse, the vacuum gap has stronger insulation and voltage resistance capability, so the rated current capacity of the vacuum fuse can be improved by shortening the length of the melt and reducing the resistance of the melt, but the gap size is further reduced due to the restriction of the thermal recovery characteristic of the arc gap after the melt is fused.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a structure for improving the rated current capacity of a vacuum fuse based on a double-gap structure, and the structure has higher rated current capacity.
In order to achieve the purpose, the structure for improving the rated current capacity of the vacuum fuse based on the double-gap structure comprises a fuse shell, wherein a first oxygen-free copper vacuum electrode is arranged at an opening at the top of the fuse shell, a second oxygen-free copper vacuum electrode is arranged at an opening at the bottom of the fuse shell, a short vacuum gap and a long vacuum gap are separated in the fuse shell, a short melt is arranged in the short vacuum gap, a long melt is arranged in the long vacuum gap, two ends of the short melt are respectively connected with the first oxygen-free copper vacuum electrode and the second oxygen-free copper vacuum electrode, and two ends of the long melt are respectively connected with the first oxygen-free copper vacuum electrode and the second oxygen-free copper vacuum electrode.
The fuse shell is made of glass or ceramic materials.
The fuse shell is connected with the first oxygen-free copper vacuum electrode and the second oxygen-free copper vacuum electrode in a sealing and welding mode.
The short melt is the same diameter as the long melt.
The resistance of the short melt is less than the resistance of the long melt.
The invention has the following beneficial effects:
when the structure for improving the rated current capacity of the vacuum fuse based on the double-gap structure is in specific operation, as the short melt consumes most of the electric heating power in the device with relatively small volume, the short melt is firstly fused, and after the short melt is fused, overload or short-circuit current is transferred into the long melt, at the moment, the short vacuum gap enters a medium recovery stage, after the current transfer process occurs, the long melt is fused under the action of the overload or short-circuit current, and the short vacuum gap obtains longer medium recovery time due to fault current transfer and has higher compressive strength, so that the fuse has higher compressive strength at the initial medium recovery stage, and the on-off reliability and the rated current capacity of the vacuum fuse are improved.
Drawings
FIG. 1 is a cross-sectional view of the present invention;
fig. 2 is a schematic structural diagram of the present invention.
Wherein 11 is a first oxygen-free copper vacuum electrode, 12 is a second oxygen-free copper vacuum electrode, 2 is a short melt, 3 is a short vacuum gap, 4 is a long melt, 5 is a long vacuum gap, and 6 is a fuse shell.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1 and 2, the structure for improving the rated current capacity of the vacuum fuse based on the double-gap structure includes a fuse housing 6, a first oxygen-free copper vacuum electrode 11 is disposed at an opening at the top of the fuse housing 6, a second oxygen-free copper vacuum electrode 12 is disposed at an opening at the bottom of the fuse housing 6, a short vacuum gap 3 and a long vacuum gap 5 are separated from the fuse housing 6, wherein a short melt 2 is disposed in the short vacuum gap 3, a long melt 4 is disposed in the long vacuum gap 5, two ends of the short melt 2 are respectively connected with the first oxygen-free copper vacuum electrode 11 and the second oxygen-free copper vacuum electrode 12, and two ends of the long melt 4 are respectively connected with the first oxygen-free copper vacuum electrode 11 and the second oxygen-free copper vacuum electrode 12.
The fuse shell 6 is made of glass or ceramic material; the fuse shell 6 is connected with the first oxygen-free copper vacuum electrode 11 and the second oxygen-free copper vacuum electrode 12 in a sealing and welding way; the short melt 2 and the long melt 4 have the same diameter; the resistance of the short melt 2 is smaller than that of the long melt 4, and the long vacuum gap 5 and the long melt 4 adopt a reentrant structure.
In the event of an overload or a short circuit, the short melt 2 melts with a relatively small volume, which consumes the majority of the electrical power in the interior of the device, so that it melts first, and after the short melt 2 melts, the overload or short-circuit current is transferred into the long melt 4, at which point the gap in which the short melt 2 is located enters the medium recovery phase.
Wherein, the diameters of the long melt 4 and the short melt 2 are the same, the length ratio is 10:1, the volume ratio and the resistance value ratio are both 10:1, the power ratio consumed by the long melt 4 and the short melt 2 is 1:10, the short melt 2 is firstly fused because of absorbing more electric heating power with smaller mass, then current transfer occurs, and the short gap enters an arc gap recovery stage.
The long vacuum gap 5 and the long melt 4 adopt a turn-back structure for eliminating the inductance of the long melt 4, reducing the inductance voltage drop in the current transfer process and avoiding the re-combustion of the short gap connected in parallel with the long vacuum gap.
After the current transfer process occurs, the long melt 4 is fused under the action of overload or short-circuit current, the thermal state after fusing has higher compressive strength due to longer gaps, and the short vacuum gap 3 has higher compressive strength due to longer medium recovery time obtained by fault current transfer.
Claims (6)
1. A structure for improving the rated current capacity of a vacuum fuse based on a double-gap structure is characterized by comprising a fuse shell (6), a first oxygen-free copper vacuum electrode (11) is arranged at an opening at the top of the fuse shell (6), a second oxygen-free copper vacuum electrode (12) is arranged at an opening at the bottom of the fuse shell (6), a short vacuum gap (3) and a long vacuum gap (5) are separated in the fuse shell (6), wherein, a short melt (2) is arranged in the short vacuum gap (3), a long melt (4) is arranged in the long vacuum gap (5), wherein, two ends of the short melt (2) are respectively connected with the first oxygen-free copper vacuum electrode (11) and the second oxygen-free copper vacuum electrode (12), and two ends of the long melt (4) are respectively connected with the first oxygen-free copper vacuum electrode (11) and the second oxygen-free copper vacuum electrode (12).
2. The structure for improving rated current capacity of the vacuum fuse based on the double gap structure as claimed in claim 1, wherein the fuse housing (6) is made of glass or ceramic material.
3. The structure for improving rated current capacity of a vacuum fuse based on the double gap structure as claimed in claim 1, wherein the fuse housing (6) is hermetically welded with the first oxygen-free copper vacuum electrode (11) and the second oxygen-free copper vacuum electrode (12).
4. The structure for improving rated current capacity of a vacuum fuse based on the double gap structure as claimed in claim 1, wherein the short fuse element (2) and the long fuse element (4) have the same diameter.
5. The structure for improving rated current capacity of a vacuum fuse based on the double gap structure as claimed in claim 1, wherein the resistance of the short fuse element (2) is smaller than that of the long fuse element (4).
6. The structure for improving rated current capacity of the vacuum fuse based on the double-gap structure is characterized in that the long vacuum gap (5) and the long melt (4) adopt a folding structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110211666.1A CN112951680A (en) | 2021-02-25 | 2021-02-25 | Structure for improving rated current capacity of vacuum fuse based on double-gap structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110211666.1A CN112951680A (en) | 2021-02-25 | 2021-02-25 | Structure for improving rated current capacity of vacuum fuse based on double-gap structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112951680A true CN112951680A (en) | 2021-06-11 |
Family
ID=76246151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110211666.1A Pending CN112951680A (en) | 2021-02-25 | 2021-02-25 | Structure for improving rated current capacity of vacuum fuse based on double-gap structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112951680A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1334581A (en) * | 2000-07-07 | 2002-02-06 | 库帕技术公司 | Breaking switch provided with fuse |
| CN102646558A (en) * | 2012-05-10 | 2012-08-22 | 苏州晶讯科技股份有限公司 | High pressure resistant surface mounted fuse |
| CN203398063U (en) * | 2013-07-19 | 2014-01-15 | 厦门赛尔特电子有限公司 | Fuse in the shape of n |
| JP2014007134A (en) * | 2012-06-21 | 2014-01-16 | Soc Corp | High breaking capacity fuse |
| CN205028881U (en) * | 2015-10-19 | 2016-02-10 | 友容新源电气（昆山）有限公司 | U type fuse |
| CN206116331U (en) * | 2016-11-02 | 2017-04-19 | 西安苏熔电器有限公司 | A direct current fast acting fuse for electric automobile |
| CN207425774U (en) * | 2017-09-22 | 2018-05-29 | 杭州布雷科电气有限公司 | A kind of DC fast speed fuse used for electric vehicle |
| CN110534383A (en) * | 2019-09-09 | 2019-12-03 | 广东中贝能源科技有限公司 | A kind of integral type is from being in harmony high density intelligent fuse |
| CN111613493A (en) * | 2020-05-29 | 2020-09-01 | 安徽徽电科技股份有限公司 | High-voltage current-limiting fusing protection device |
-
2021
- 2021-02-25 CN CN202110211666.1A patent/CN112951680A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1334581A (en) * | 2000-07-07 | 2002-02-06 | 库帕技术公司 | Breaking switch provided with fuse |
| US20020080005A1 (en) * | 2000-07-07 | 2002-06-27 | Mollet Ronald Emil | Fused disconnect switch |
| CN102646558A (en) * | 2012-05-10 | 2012-08-22 | 苏州晶讯科技股份有限公司 | High pressure resistant surface mounted fuse |
| JP2014007134A (en) * | 2012-06-21 | 2014-01-16 | Soc Corp | High breaking capacity fuse |
| CN203398063U (en) * | 2013-07-19 | 2014-01-15 | 厦门赛尔特电子有限公司 | Fuse in the shape of n |
| CN205028881U (en) * | 2015-10-19 | 2016-02-10 | 友容新源电气（昆山）有限公司 | U type fuse |
| CN206116331U (en) * | 2016-11-02 | 2017-04-19 | 西安苏熔电器有限公司 | A direct current fast acting fuse for electric automobile |
| CN207425774U (en) * | 2017-09-22 | 2018-05-29 | 杭州布雷科电气有限公司 | A kind of DC fast speed fuse used for electric vehicle |
| CN110534383A (en) * | 2019-09-09 | 2019-12-03 | 广东中贝能源科技有限公司 | A kind of integral type is from being in harmony high density intelligent fuse |
| CN111613493A (en) * | 2020-05-29 | 2020-09-01 | 安徽徽电科技股份有限公司 | High-voltage current-limiting fusing protection device |
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