CN114512377A - Fuse for high-voltage fuse - Google Patents
Fuse for high-voltage fuse Download PDFInfo
- Publication number
- CN114512377A CN114512377A CN202110319932.2A CN202110319932A CN114512377A CN 114512377 A CN114512377 A CN 114512377A CN 202110319932 A CN202110319932 A CN 202110319932A CN 114512377 A CN114512377 A CN 114512377A
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- China
- Prior art keywords
- fuse
- arc extinguishing
- arc
- diameter portion
- head
- Prior art date
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Links
- 229910052751 metal Inorganic materials 0.000 claims abstract description 103
- 239000002184 metal Substances 0.000 claims abstract description 103
- 230000002093 peripheral effect Effects 0.000 claims description 55
- 238000009826 distribution Methods 0.000 claims description 12
- 238000007789 sealing Methods 0.000 description 18
- 239000012212 insulator Substances 0.000 description 8
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 230000001936 parietal effect Effects 0.000 description 5
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
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- 239000013013 elastic material Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910052573 porcelain Inorganic materials 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 229910001316 Ag alloy Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 229910000570 Cupronickel Inorganic materials 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 229910001128 Sn alloy Inorganic materials 0.000 description 1
- QCEUXSAXTBNJGO-UHFFFAOYSA-N [Ag].[Sn] Chemical compound [Ag].[Sn] QCEUXSAXTBNJGO-UHFFFAOYSA-N 0.000 description 1
- PQIJHIWFHSVPMH-UHFFFAOYSA-N [Cu].[Ag].[Sn] Chemical compound [Cu].[Ag].[Sn] PQIJHIWFHSVPMH-UHFFFAOYSA-N 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- XRBURMNBUVEAKD-UHFFFAOYSA-N chromium copper nickel Chemical compound [Cr].[Ni].[Cu] XRBURMNBUVEAKD-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- YOCUPQPZWBBYIX-UHFFFAOYSA-N copper nickel Chemical compound [Ni].[Cu] YOCUPQPZWBBYIX-UHFFFAOYSA-N 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical class [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- CLDVQCMGOSGNIW-UHFFFAOYSA-N nickel tin Chemical compound [Ni].[Sn] CLDVQCMGOSGNIW-UHFFFAOYSA-N 0.000 description 1
- 229910000623 nickel–chromium alloy Inorganic materials 0.000 description 1
- 230000036544 posture Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 229910000969 tin-silver-copper Inorganic materials 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Images
Classifications
-
- 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
- H01H85/042—General constructions or structure of high voltage fuses, i.e. above 1000 V
Abstract
The invention provides a novel fuse for a high-voltage fuse. The fuse for a high-voltage fuse includes: the fuse wire connecting structure comprises a head metal part, a lower connecting wire, a fusible connecting wire connected between the head metal part and the lower connecting wire, and a cylindrical arc extinguishing pipe surrounding the fusible connecting wire. The head metal piece is provided with a head top part and a columnar part. The crown is located outside the arc tube. The columnar portion extends from the top of the head toward the arc extinguishing tube. An annular internal pressure adjusting member is fixed to a columnar portion in the arc extinguishing pipe, and the arc extinguishing pipe is fixed to the head metal fitting by the internal pressure adjusting member.
Description
Technical Field
The present specification discloses a technique relating to a fuse for a high-voltage fuse.
Background
In order to prevent overcurrent from flowing through a high-voltage device such as a transformer, a high-voltage fuse is disposed between a distribution line and the high-voltage device. Patent document 1 discloses a high-voltage fuse (cylindrical breaker) including: the fuse includes an upper electrode connected to a distribution line, a lower electrode connected to a wiring on the high-voltage device side, and a fuse for a high-voltage fuse disposed between the upper electrode and the lower electrode. The fuse for a high-voltage fuse disclosed in patent document 1 includes: the arc extinguishing device comprises a head metal piece connected with the upper electrode, a lower connecting wire connected with the lower electrode, a fusible connecting wire connected between the head metal piece and the lower connecting wire, and a cylindrical arc extinguishing tube surrounding the fusible connecting wire. The closed space is formed by being surrounded by a support plug (a blocking member) on the head metal fitting side, a support plug (a blocking member) on the lower connecting wire (a connecting member connecting the lower connecting wire to the fusible connecting wire) side, and the arc extinguishing tube, and the fusible connecting wire is positioned in the closed space. When the fusible link is fused to generate an arc, the arc extinguishing tube generates an arc extinguishing gas in the sealed space to extinguish the arc. According to patent document 1, the arc extinguishing tube is fixed to the head metal fitting by adhesion.
Patent document
Patent document 1: japanese patent laid-open No. 2020 and 61334
As described above, the arc generated by the fusion of the fusible link is extinguished by the arc-extinguishing gas generated in the sealed space. At this time, if the pressure of the arc-extinguishing gas in the closed space is insufficient, it becomes difficult to extinguish the arc. On the other hand, if the pressure of the arc-extinguishing gas in the closed space is too high, although the arc can be extinguished, the arc-extinguishing tube may be damaged by the pressure of the arc-extinguishing gas, and the fuse tube housing the arc-extinguishing tube may be damaged. Provided that it is constituted by: when the pressure of the arc-extinguishing gas in the closed space reaches a predetermined value, the volume in the closed space increases, and the arc-extinguishing tube is separated from the head metal member, so that the arc-extinguishing tube can be prevented from being damaged. However, the fuse for a high-voltage fuse of patent document 1 is configured such that the arc-extinguishing tube is fixed to the head metal fitting by adhesion, and therefore it is difficult to: the pressure at which the arc-extinguishing tube is released from the head metal piece is set and controlled. An object of the present invention is to provide a novel fuse for a high-voltage fuse, which can set and control the pressure at which an arc extinguishing tube is released from a head metal fitting.
Disclosure of Invention
The fuse for a high-voltage fuse disclosed in the present specification is arranged between an upper electrode and a lower electrode in a high-voltage fuse having the upper electrode connected to a distribution line and the lower electrode connected to a wiring on a high-voltage device side. The fuse for a high-voltage fuse includes: the arc-extinguishing device comprises a head metal piece connected with the upper electrode, a lower connecting wire connected with the lower electrode, a fusible connecting wire connected between the head metal piece and the lower connecting wire, and a cylindrical arc-extinguishing tube surrounding the fusible connecting wire. The head metal piece is provided with a head top part and a columnar part. The crown is located outside the arc tube. The columnar portion extends from the top of the head toward the arc extinguishing tube. According to this fuse for a high-voltage fuse, an internal pressure adjustment member is fixed to a columnar portion in an arc extinguishing pipe. Further, according to the fuse for a high-voltage fuse, the arc extinguishing tube is fixed to the head metal fitting by the internal pressure adjusting member.
Drawings
Fig. 1 shows a cross-sectional view of a high-voltage fuse.
Fig. 2 shows a half sectional view of the fuse of embodiment 1.
Fig. 3 shows a cross-sectional view of the main structure of the fuse.
Figure 4 shows a cross-sectional view of the head metal and the arc chute.
Fig. 5 is an enlarged sectional view showing a fixing portion of the head metal and the arc extinguishing tube.
Fig. 6 is a plan view of an internal pressure adjusting member for fixing the head metal fitting and the arc extinguishing pipe.
Fig. 7 is a sectional view showing both the arc-extinguishing pipes detached from the head metal member.
Fig. 8 is an enlarged cross-sectional view of the fixing portions of the head metal fitting and the arc tube in a state where the arc tube is removed from the fitting.
Fig. 9 is a sectional view of the head metal piece and the arc-extinguishing tube of the fuse according to embodiment 2.
Fig. 10 shows a cross-sectional view of the head metal piece and the arc-extinguishing tube of the fuse of embodiment 3.
Description of the reference numerals
12: fuse (fuse for high-voltage fuse) 46: lower electrode
56: upper electrode 70: head metal piece
70 a: crown portion 70 b: columnar part
76: inner pressure adjusting member (gasket) 80: fusible link
85: arc extinguishing tube 85 a: small diameter part
85 b: large diameter portion 92: lower connecting line
100: high-voltage fuse
Detailed Description
(high voltage fuse)
The high-voltage fuse is connected between the distribution line and a high-voltage device such as a transformer via an external electric wire. The high-voltage fuse includes: the high-voltage fuse includes a cylindrical body insulator made of porcelain, an upper electrode connected to a distribution line, a lower electrode connected to a wiring on the high-voltage equipment side, and a fuse for the high-voltage fuse disposed between the upper electrode and the lower electrode. The upper electrode, the lower electrode, and the fuse for the high-voltage fuse are disposed in the body insulator. When an excessive current (a current equal to or larger than a predetermined value) flows through a high-voltage fuse, a member (fusible link) of the high-voltage fuse blows, and a distribution line between the distribution line and a high-voltage device is disconnected. Further, when the member of the high-voltage fuse is fused, the distribution line and the equipment can be reconnected by replacing the high-voltage fuse.
(fuse for high-voltage fuse)
The fuse for a high-voltage fuse comprises: head metal spare, lower part connecting wire, fusible connecting wire and arc extinguishing tube. The upper metal contact is fixed to the upper portion of the fuse tube, and the lower metal contact is attached to the lower portion of the fuse tube. The fuse tube is formed by a cylindrical insulating material. Thereby, the upper contact and the lower contact are insulated by the fuse tube. The head metal piece, the lower connecting wire, the fusible connecting wire and the arc extinguishing tube are arranged in the fuse cylinder. The header metal piece is connected to the upper electrode by means of an upper contact. The lower connection line is connected to the lower electrode via a lower contact. The fusible link is surrounded by the arc-extinguishing tube and connected to the head metal part and the lower link between the head metal part and the lower link. The header metal piece is not in direct electrical communication with the lower feedthroughs (upper and lower contacts), but rather is in electrical communication through fusible feedthroughs. The fusible link is formed of a low melting point metal. As a material of the fusible link, a tin single body, an alloy mainly composed of tin (nickel-tin alloy, tin-silver alloy, copper-tin alloy, tin-silver-copper alloy, or the like) can be used. In addition, the fusible link is preferably formed of a metal containing no lead.
The head metal member has: a top portion having an outer dimension larger than the inner diameter of the arc extinguishing pipe, and a columnar portion extending from the top portion to the arc extinguishing pipe and having an outer diameter smaller than the inner diameter of the arc extinguishing pipe. The columnar portion is inserted into the arc extinguishing pipe and fitted into the arc extinguishing pipe with play. Namely, the columnar portion is inserted into the arc extinguishing pipe. When the columnar part is inserted into the arc extinguishing pipe, the following postures are presented: the top portion is located outside the arc extinguishing pipe, and the columnar portion extends inside the arc extinguishing pipe. The head metal fitting may be configured to: the crown portion and the columnar portion may be an integral body (an inseparable member), or may be formed by fixing the crown portion and the columnar portion as separate members. The shape of the crown portion is not particularly limited as long as it is a size that cannot be inserted into the arc extinguishing pipe, and may be, for example, a circular shape, a polygonal shape, or the like.
The arc extinguishing tube may be formed by winding a wrapping paper or the like. The inner diameter and the outer diameter of the arc extinguishing tube can be adjusted by adjusting the number of windings of the wrapping paper. The arc extinguishing tube has: a small diameter portion having an inner diameter smaller than the other portions, and a large diameter portion having an inner diameter larger than the small diameter portion. The small diameter portion is provided at the parietal side end portion. The columnar portion of the head metal member extends to the large diameter portion through the small diameter portion. In addition, a cutout may be provided in the inner peripheral surface of the small diameter portion at the boundary between the small diameter portion and the large diameter portion of the arc extinguishing pipe. That is, the end portion on the large diameter portion side of the small diameter portion may be provided with: the portion of the small diameter portion having a small inner diameter is substantially increased. The defect part may be: the tapered shape may be such that the amount of deficiency continuously increases (substantially the inner diameter increases) as the diameter increases toward the larger diameter portion, or the tapered shape may be such that the amount of deficiency discontinuously increases in a step shape (step). The arc extinguishing tube (the small diameter portion and the large diameter portion) may be formed of one member. Alternatively, the small diameter portion may be formed by fixing a cylinder body separate from the arc extinguishing pipe (large diameter portion) to the inner peripheral surface of the arc extinguishing pipe having a uniform inner diameter (that is, the arc extinguishing pipe having the large diameter portion from one end to the other end). By forming the arc-extinguishing pipe using the cylindrical bodies having different diameters, the inner diameter of the arc-extinguishing pipe can be easily changed (forming the small diameter portion and the large diameter portion).
The arc extinguishing pipe is positioned (attached) to the head metal fitting by the small diameter portion. Specifically, an annular internal pressure adjustment member is fixed to a columnar portion of the head metal fitting in the arc extinguishing pipe. The inner pressure adjusting member may be annular, and have an outer dimension larger than the inner diameter of the small diameter portion and smaller than the inner diameter of the large diameter portion. The internal pressure adjusting member is press-fitted and fixed to the columnar portion of the head metal fitting in a state where the columnar portion is inserted into the arc extinguishing pipe (a state where the columnar portion passes through the small diameter portion). When the internal pressure adjusting member is fixed to the columnar portion, the small-diameter portion is disposed between the crown portion of the head metal and the internal pressure adjusting member. By fixing the internal pressure adjusting member to the columnar portion, the movement of the arc extinguishing tube in the axial direction can be restricted by the crown portion and the internal pressure adjusting member, and the arc extinguishing tube can be positioned with respect to the head metal fitting. That is, the arc extinguishing pipe is not fixed to the head metal fitting by bonding, but is attached to the head metal fitting. The inner peripheral portion of the internal pressure adjusting member may be in contact with the entire circumference of the columnar portion, or may be in contact with a part of the columnar portion in the circumferential direction (for example, intermittently in the circumferential direction).
When the internal pressure adjusting member is press-fitted and fixed to the columnar portion, the inner peripheral portion of the internal pressure adjusting member is deformed, and the internal pressure adjusting member is fixed to the columnar portion in a state where the inner peripheral portion is bent in a direction away from the head top portion. When the inner peripheral portion of the internal pressure adjusting member is fixed to the columnar portion in a state bent in a direction away from the crown portion, the position of the internal pressure adjusting member with respect to the columnar portion does not change even if the small-diameter portion of the arc extinguishing tube comes into contact with the internal pressure adjusting member (even if the arc extinguishing tube is moved in a direction away from the crown portion of the head metal fitting) in a normal state (a state in which no overcurrent flows through the high-voltage fuse). That is, the arc extinguishing pipe does not separate from the head metal member. The internal pressure adjusting member may be made of metal. When the metal internal pressure adjusting member is press-fitted and fixed to the columnar portion, the inner peripheral portion is easily deformed (plastically deformed), and the inner peripheral portion can be easily bent in a direction away from the head top portion. As an example of the metal internal pressure adjusting member, a metal gasket is exemplified.
As will be described in detail later, in the high-voltage fuse disclosed in the present specification, when an overcurrent is applied to the high-voltage fuse, the arc extinguishing tube may move downward relative to the head metal. When the arc extinguishing tube moves downward (actually, the arc extinguishing tube moves away from the vertex), the inner peripheral portion of the inner pressure adjusting member changes from a state of being bent in a direction away from the vertex to: a state of being bent toward the parietal region. In particular, if the internal pressure adjusting member is a metal washer, the direction in which the inner peripheral portion is bent is likely to change from a direction away from the parietal region to a direction toward the parietal region (plastic deformation). By adjusting the contact area of the inner peripheral portion of the inner pressure adjusting member in contact with the columnar portion and/or the thickness of the inner pressure adjusting member, the force in which the direction in which the inner peripheral portion is bent starts to change can be adjusted. The inner circumferential portion of the inner pressure adjustment member may be provided with: a projection projecting toward a radial center. In this case, a plurality of projections may be provided at equal intervals in the circumferential direction. By adjusting the number of the protruding portions and the gap between the protruding portions, the force in which the direction in which the inner peripheral portion is bent starts to change can be adjusted.
As described above, fusible links are connected between the header metal piece and the lower link. That is, the fusible link is fixed to both the head metal fitting and the lower link. Specifically, one end of the fusible link is directly fixed to the head metal fitting, and the other end of the fusible link is fixed to the lower link by the fastening metal fitting. In the fuse for a high-voltage fuse, a fusible link and a tensile cord are fixed to the head metal fitting and the fastening metal fitting. The tensile cord functions as a resistor. As a material of the tensile wire, stainless steel, silver simple substance, copper alloy mainly containing copper (copper-nickel alloy, copper-nickel-chromium alloy), and the like can be used. For the fuse for the high-voltage fuse, the columnar part of the head metal piece is provided with: an upper sealing component for sealing the gap between the columnar part and the arc-extinguishing pipe, and a lower sealing component for sealing the gap between the fastening metal piece and the arc-extinguishing pipe. As a result, the fusible link is disposed: the upper and lower sealing members and the arc extinguishing pipe (large diameter portion) surround the sealed space.
When an overcurrent (a current equal to or larger than a predetermined value) flows through the fusible link, the fusible link is fused and the tensile cord is opened. When the fusible link is fused, arc-extinguishing gas is generated from the inner surface of the arc-extinguishing tube by heat generated at the time of fusing. Arc-extinguishing gas generated from the arc-extinguishing tube is filled in the sealed space, and the pressure in the sealed space rises, thereby extinguishing an arc generated when the arc is blown out. When the fusible link is fused, the lower sealing member moves downward due to the pressure rise in the sealed space, and protrudes from the lower end of the fuse tube together with the lower link.
When the pressure in the closed space excessively rises, because of a sharp increase in volume in the closed space, there is applied: a force which moves the lower sealing member downward and also moves the lower sealing member downward with respect to the arc extinguishing pipe. In the fuse for a high-voltage fuse disclosed in the present specification, when the pressure in the sealed space rises to a predetermined value or more, the arc-extinguishing tube moves a little downward with respect to the head metal fitting, and the small-diameter portion of the arc-extinguishing tube moves the internal pressure adjustment member downward. As a result, a force that the arc extinguishing tube moves the internal pressure adjustment member downward is applied to the outer peripheral portion of the internal pressure adjustment member, and the inner peripheral portion of the internal pressure adjustment member is bent in a direction toward the vertex portion of the head metal. When the inner peripheral portion of the internal pressure adjusting member is bent in the direction toward the parietal portion, the arc extinguishing tube can move downward with respect to the head metal even with a relatively weak force (pressure in the closed space is smaller than a predetermined value). The arc extinguishing pipe is easily moved downward relative to the head metal fitting, so that the volume in the closed space is increased at an initial stage, and the pressure in the closed space is reduced. That is, the internal pressure of the sealed space can be adjusted by the internal pressure adjusting means. In addition, when the pressure in the closed space causes the arc extinguishing pipe to move further downward relative to the head metal member, the arc extinguishing pipe is separated from the head metal member, so that the pressure in the closed space becomes equal to the pressure outside the closed space. That is, the sealed space is no longer in a sealed state, and the pressure in the sealed space decreases to be the same as the pressure in the fuse tube. As a result, the fuse tube is not broken. Further, the force (pressure) for deforming the state of being bent downward (in the direction away from the crown portion) from the inner peripheral surface of the internal pressure adjustment member into the state of being bent upward (in the direction toward the crown portion) can be known in advance through experiments.
As described above, the arc extinguishing pipe may be provided with: and a void portion substantially increasing the inner diameter of the small diameter portion. If the small diameter portion is provided with a cutout portion, when the inner peripheral portion of the internal pressure adjustment member is bent upward, the bent portion can be positioned in the cutout portion. That is, the curved portion of the internal pressure adjusting member can be prevented from contacting the arc extinguishing tube (small diameter portion). By preventing the curved portion from contacting the arc-extinguishing tube, it is possible to suppress: the change of the orientation of the curved portion is hindered by the arc extinguishing tube. When the pressure in the closed space becomes equal to or higher than a predetermined value, the direction of the bent portion can be reliably changed, the volume in the closed space increases, the pressure in the closed space can be reliably reduced, and the arc-extinguishing tube can be reliably removed from the head metal fitting.
[ examples ] A method for producing a compound
(high-voltage fuse)
Referring to fig. 1, a high voltage fuse 100 is illustrated. The high-voltage fuse 100 is provided on a distribution line and used for protecting high-voltage equipment such as a transformer. The high-voltage fuse 100 includes: a porcelain body insulator 8, an upper electrode 56 connected to the power distribution line side, an arc extinguishing rod 54 disposed inside the upper electrode 56, a lower electrode 46 connected to the equipment side, and a fuse 12 connecting the upper electrode 56 and the lower electrode 46. The main insulator 8 is cylindrical, and a plurality of insulating skirts 14 are provided on the outer peripheral surface. Formed in the main body insulator 8 are: a cylindrical 1 st chamber 4, and a cylindrical 2 nd chamber 20 having a larger diameter than the 1 st chamber 4. A cylindrical arc-extinguishing cylinder 6 is disposed in the 1 st chamber 4. The fuse 12 is disposed inside the arc extinguishing cylinder 6. The high-voltage fuse 100 is configured to: in the direction of gravity, the 1 st chamber 4 is the upper side, and the 2 nd chamber 20 is the lower side. The upper electrode 56 is disposed in the 1 st chamber 4, and the lower electrode 46 is disposed in the 2 nd chamber 20.
The conical upper shell 2 is fixed to the upper portion of the main insulator 8 by an adhesive. The lead wire of the upper die cone 2 is connected to the distribution wire. The conical lower shell 28 is fixed to the lower side wall 24 of the main insulator 8 by an adhesive. The lead of the lower mold cone 28 is connected to a transformer or the like.
The fuse 12 extends from chamber 1, 4, through to chamber 2, 20, connecting the upper electrode 56 to the lower electrode 46. The fuse 12 includes: an insulative fuse tube 50, an upper contact 52 provided on the upper portion of the fuse tube 50, a lower contact 48 provided on the lower portion of the fuse tube 50, and a display tube 58 provided below the lower contact 48. The upper contact 52 is connected to the upper electrode 56 and the lower contact 48 is connected to the lower electrode 46. The cushioning member 18 is disposed between the lower contact 48 and the upper surface of the 2 nd chamber. The display cartridge 58 is fixed to the fuse cartridge 50. On the other hand, the lower contact 48 is vertically displaceable with respect to the fuse tube 50 and the display tube 58. The display cylinder 58 constitutes the lower end of the fuse 12.
As will be described in detail later, the fuse tube 50 contains: a head metal 70, a fusible link 80, and a lower link 90. The lower connecting wire 90 is taken out of the fuse tube 50 from the lower end of the display tube 58, folded back upward at the lower end portion of the display tube 58, and fixed to the fastening screw 60 attached to the lower contact 48. The spring 44 is disposed in a compressed state between the lower contact 48 and the indicator cylinder 58. Thus, the lower connecting wire 90 is applied with a tensile force. In other words, by tightly fixing the lower connecting wire 90 to the fastening screw 60, the spring 44 is compressed.
An opening 38 is provided at the lower end of the main insulator 8 (the lower end of the 2 nd chamber 20). The opening 38 is closed by the cover member 34. The cover member 34 is bonded to the inner wall 30 of the 2 nd chamber 20 with an adhesive 36. The lid member 34 is a bottomed cylindrical shape, and includes: a shaft portion 34a, a flange portion 34b provided on the outer peripheral surface of the shaft portion 34a, and an opening/closing portion (bottom portion) 32 provided on the inner peripheral surface of the shaft portion 34 a. The flange portion 34b is provided at the vertically intermediate portion of the shaft portion 34a, protrudes radially outward, and surrounds the outer periphery of the shaft portion 34a by 1 circumference. The opening/closing unit 32 is provided with: is positioned below the flange portion 34b and above the lower end of the shaft portion 34 a. Thus, the lower end of the shaft portion 34a constitutes: and a projection 34c projecting downward from the opening/closing portion 32. The opening/closing portion 32 is protected by the projection 34 c. The lid member 34 (including the opening/closing portion 32) is formed of an elastic material such as a non-flammable rubber or a soft synthetic resin.
The opening/closing portion 32 is provided with radial notches 32 a. This allows the fuse 12 and the like to easily pass through the opening/closing portion 32. That is, when the fuse 12 or the like passes through the opening/closing portion 32, the opening/closing portion 32 is deformed to open the opening/closing portion 32, and after the fuse 12 or the like passes through, the opening/closing portion 32 returns to the original shape to be closed. As described above, since the opening/closing portion 32 (the lid member 34) is formed of an elastic material, the lid member 34 can be easily deformed (elastically deformed) by providing the notch 32a to open and close the opening/closing portion.
According to the high-voltage fuse 100, when a current equal to or higher than a predetermined value flows through the fuse 12, the fusible link 80 in the fuse 12 is blown. As a result, the spring 44 expands, and the fuse 12 (a member other than the lower contact 48) including the fuse tube 50 moves downward in a state where the lower contact 48 is connected to the lower electrode 46. After the fuse cylinder 50 (the fuse 12) moves downward due to the elastic force of the spring 44 and the gravity, the step portion 50a formed in the fuse cylinder 50 comes into contact with: and a spring 45 (see fig. 2) disposed on the upper contact 52 side of the lower contact 48. The movement of the fuse tube 50 downward is buffered, and the movement of the fuse tube 50 is stopped. When the fuse 12 moves downward, the display cylinder 58 is exposed from the lid member 34 (the opening/closing portion 32) to the lower portion of the high-voltage fuse 100. That is, by checking whether or not the display cylinder 58 is exposed to the lower portion of the high-voltage fuse 100, it is possible to determine whether or not the fusible link 80 is blown (whether or not it is necessary to replace the fuse 12). In addition, even if the fusible link 80 is blown, the lower contact 48 is continuously connected (fixed) to the lower electrode 46. This can prevent the fuse 12 (the display tube 58) from falling off the high-voltage fuse 100.
(fuse: embodiment 1)
Referring to fig. 2-6, the fuse 12 is illustrated. As shown in fig. 2, the upper contact 52 is fixed to the upper portion of the fuse cartridge 50. The upper contact 52 is screwed to the fuse holder 50. A concave-convex surface 52a is formed on a part of the surface of the upper contact 52. By providing the concave-convex surface 52a, when the upper contact 52 is screwed into the fuse tube 50, the sliding of the upper contact 52 can be suppressed, and the upper contact 52 can be reliably fixed to the fuse tube 50. The lower portion of the fuse cartridge 50 extends into the lower contact 48. An arc extinguishing tube 85 is disposed in the fuse tube 50. A crown portion 70a of the head metal 70 is provided at the upper end of the arc extinguishing pipe 85 and outside the arc extinguishing pipe 85. The crown 70a contacts the upper contact 52. That is, the header metal fitting 70 is connected to the upper electrode 56 via the upper contact 52 (see fig. 1).
The lower connecting wire 90 is exposed from the lower end of the arc extinguishing tube 85 to the outside of the arc extinguishing tube 85, and is exposed from the lower end of the display tube 58 to the outside of the fuse 12. A connection terminal 90a is fixed to an end of the lower connection line 90, and the connection terminal 90a is fixed to the fastening screw 60 (lower contact 48). That is, the lower connection line 90 is connected to the lower electrode 46 via the lower contact 48 (see fig. 1).
Fig. 3 shows the internal structure of the arc extinguishing tube 85. As shown in fig. 3, the head metal fitting 70 includes a crown portion 70a and a columnar portion 70 b. The crown portion 70a is provided at one end (upper end) of the columnar portion 70 b. In other words, the columnar portion 70b extends in one direction from the head top portion 70 a. The crown 70a is disk-shaped and has an outer diameter greater than the outer diameter of the arc chute 85. Since the outer diameter of the crown portion 70a is larger than the inner diameter of the arc extinguishing pipe 85, the crown portion 70a is located outside the arc extinguishing pipe 85 on the upper side of the arc extinguishing pipe 85. The columnar portion 70b extends from the head top portion 70a toward the lower inside of the arc extinguishing tube 85. The upper sealing member 74 is adhesively fixed to the lower end of the columnar portion 70 b. The upper sealing member 74 may be fitted into the columnar portion 70b so as to cover the lower end of the columnar portion 70b, and the upper sealing member 74 may be fixed to the columnar portion 70 b. The upper sealing member 74 has a disk shape, and the outer peripheral surface thereof is in contact with the inner peripheral surface of the arc extinguishing pipe 85. The upper seal member 74 seals the gap between the columnar portion 70b and the arc extinguishing pipe 85.
The fusible link 80 and the tensile cord 82 are fixed to the lower portion of the columnar portion 70 b. Thereby, the fusible link 80 and the tensile strand 82 are surrounded on the sides by the arc extinguishing tube 85. In addition, the fusible link 80 and the tensile cord 82 are also fixed to the fastening metal member 92. In other words, one end of the fusible link 80 and the tensile cord 82 is fixed to the columnar portion 70b (the head metal fitting 70), and the other end is fixed to the fastening metal fitting 92. The fastening metal member 92 is also fixed with: a lower connection line 90 having a connection terminal 90 a. The fusible link line 80 and the tensile link line 82 are connected to both the columnar portion 70b (head metal 70) and the lower link line 90 by means of the fastening metal 92.
A lower seal member 94 is adhesively fixed to the upper end of the fastening metal fitting 92. The lower sealing member 94 is disk-shaped, and its outer peripheral surface contacts the inner peripheral surface of the arc extinguishing pipe 85. The lower sealing member 94 seals the gap between the fastening metal member 92 and the arc extinguishing pipe 85. The lower sealing member 94 is provided at a position apart from the upper sealing member 74 in the up-down direction. Thus, fusible links 80 and tensile links 82 exist: the sealed space 84 is surrounded by the upper sealing member 74, the lower sealing member 94, and the arc extinguishing pipe 85.
Further, a spring washer 72 is attached to the upper end (outer periphery of the upper end portion) of the arc extinguishing pipe 85. The spring washer 72 is an example of a metal washer (internal pressure adjusting member). The spring washer 72 is fitted in a depression (not shown) provided on the outer peripheral surface of the upper end portion of the arc extinguishing pipe 85, and is positioned with respect to the arc extinguishing pipe 85. The spring washer 72 is in contact with the lower surface of the crown 70a of the head metal 70. Therefore, as shown in fig. 2, when the arc extinguishing tube 85 is mounted on the fuse tube 50, the spring washer 72 presses the crown portion 70a toward the upper contact 52, and the crown portion 70a and the upper contact 52 are reliably brought into conduction, so that the upper electrode 56 and the lower electrode 46 are reliably brought into conduction (see fig. 1).
Fig. 4 shows an enlarged view of the upper end portion of the arc extinguishing tube 85. As shown in fig. 4, the arc extinguishing pipe 85 includes a small diameter portion 85a and a large diameter portion 85 b. The small diameter portion 85a is provided at an end (upper end portion) on the crown portion 70a side. The inner diameter of the small-diameter portion 85a is smaller than the other portion from one end to the other end of the arc extinguishing pipe 85 (see fig. 3). In the arc-extinguishing tube 85, the portion other than the small-diameter portion 85a is formed as: all the inner diameters are equal (the inner diameter is larger than the small diameter portion 85 a). That is, in the arc extinguishing pipe 85, the portion other than the small diameter portion 85a is the large diameter portion 85 b. The columnar portion 70b of the head metal 70 is inserted from the upper end of the small diameter portion 85a of the arc extinguishing pipe 85, and the washer 76 is press-fitted and fixed to the columnar portion 70b at the step portion of the boundary portion between the small diameter portion 85a and the large diameter portion 85 b. Further, the cylindrical portion 70b is inserted into the small diameter portion 85a, and the washer 76 is fixed to the cylindrical portion 70b, so that the arc extinguishing pipe 85 is rotatable with respect to the head metal fitting 70. The outer peripheral surface of the columnar portion 70b and the inner peripheral surface of the small-diameter portion 85a may be fixed by adhesion or the like. The washer 76 is annular and has a circular outer periphery. The outer diameter of the washer 76 is larger than the inner diameter of the small diameter portion 85a but smaller than the inner diameter of the large diameter portion 85 b. Therefore, the surface (upper side surface) of the washer 76 faces the surface (lower side surface) of the small diameter portion 85 a.
As described above, the crown portion 70a is located outside the arc extinguishing pipe 85 (outside the small diameter portion 85a) on the upper side of the arc extinguishing pipe 85. The upper surface of the washer 76 faces the lower surface of the small-diameter portion 85 a. More specifically, the upper surface of the washer 76 contacts the lower surface of the small-diameter portion 85 a. Therefore, the small diameter portion 85a is disposed between the crown portion 70a and the washer 76 in the vertical direction. The small diameter portion 85a is disposed between the head top portion 70a and the washer 76, and the arc extinguishing pipe 85 is positioned (fixed) to the head metal 70.
Fig. 5 is an enlarged view of a boundary portion between the small diameter portion 85a and the large diameter portion 85 b. As shown in fig. 5, a cut-out portion 85c is formed at a boundary portion between the small diameter portion 85a and the large diameter portion 85b and at a corner portion (an angle between the inner peripheral surface and the lower surface) of the small diameter portion 85 a. The cutout 85c is formed around the small diameter portion 85a by 1 circumference, and the amount of cutout is continuously increased toward the large diameter portion 85b (lower portion). In other words, the tapered cutout portion 85c is provided at the lower end of the small diameter portion 85a so as to surround 1 circumference in the circumferential direction. The defect portion 85c is formed by: even if the inner peripheral portion 76a of the washer 76 described later is bent upward, the inner peripheral portion 76a does not come into contact with the cutout portion 85 c.
An inner peripheral portion 76a of the washer 76 is bent downward (in a direction away from the crown portion 70 a). As described above, the washer 76 is press-fitted and fixed to the columnar portion 70 b. Specifically, the washer 76 is press-fitted upward (toward the crown portion 70 a) from the lower end of the columnar portion 70 b. Thereby, the inner peripheral portion 76a of the washer 76 is bent downward by friction with the columnar portion 70 b. By bending the inner peripheral portion 76a downward, the small diameter portion 85a can be reliably supported, and the position of the arc extinguishing pipe 85 relative to the head metal fitting 70 can be suppressed from changing. That is, the arc extinguishing pipe 85 is firmly fixed to the head metal 70.
As shown in fig. 6, at an inner peripheral portion 76a of the washer 76, there are provided: a plurality of projections 78 projecting toward the center 76 c. The projections 78 are provided at equal intervals in the circumferential direction of the washer 76. When the washer 76 is press-fitted and fixed to the columnar portion 70b, all the protruding portions 78 are bent downward.
Referring to fig. 7 and 8, the advantages of the fuse 12 are illustrated. As described above, when a current equal to or larger than a predetermined value flows through the fuse 12, the fusible link 80 is blown. When the fusible link 80 is blown out, an arc-extinguishing gas is generated from the inner surface of the arc-extinguishing tube 85, and the arc-extinguishing gas is filled in the sealed space 84, thereby extinguishing an arc generated at the time of blowing out. When the sealed space 84 is filled with the arc-extinguishing gas, the pressure in the sealed space 84 rises. As described above, since the inner peripheral portion 76a of the washer 76 is bent downward, the head metal 70 and the arc extinguishing pipe 85 are firmly fixed. Accordingly, even if the pressure in the sealed space 84 rises to a predetermined pressure, the position of the arc extinguishing pipe 85 with respect to the head metal 70 does not change. Since the volume in the sealed space 84 does not change, the pressure in the sealed space 84 is likely to rise, and the arc generated at the time of fusing can be reliably extinguished.
When the pressure in sealed space 84 rises excessively (equal to or higher than a predetermined pressure), the volume in sealed space 84 increases, and arc extinguishing pipe 85 moves downward with respect to head metal 70 (fig. 7). When the arc extinguishing pipe 85 moves downward, the lower surface of the small diameter portion 85a contacts the washer 76, and therefore the washer 76 moves downward. At this time, a force of downward movement of the arc extinguishing pipe 85 is applied to the outer peripheral portion of the gasket 76, and the outer peripheral portion of the gasket 76 is pressed downward. Accordingly, the inner peripheral portion 76a of the washer 76 is changed from the state of being bent downward (fig. 5) to the state of being bent upward (fig. 8). In a state where the inner peripheral portion 76a of the washer 76 is bent upward, the washer 76 can be moved downward even with a relatively weak pressure (a pressure lower than a predetermined pressure). That is, when the pressure in the sealed space 84 rises to a predetermined pressure or more and the inner peripheral portion 76a of the gasket 76 is bent upward, the arc extinguishing pipe 85 is easily moved downward. By moving the arc extinguishing pipe 85 downward under the relatively weak pressure, the volume in the sealed space 84 increases at an initial stage, and the pressure in the sealed space 84 can be reduced. When the pressure in sealed space 84 causes arc extinguishing pipe 85 to move further downward with respect to head metal 70, arc extinguishing pipe 85 is separated from head metal 70, and the pressure in sealed space 84 becomes equal to the pressure outside sealed space 84 (outside arc extinguishing pipe 85). That is, the sealed space 84 is no longer in the sealed state, and the pressure in the sealed space 84 decreases to the same level as the pressure in the fuse tube 50 (see fig. 2). The pressure in the sealed space 84 can be prevented from increasing beyond a predetermined pressure, and the fuse tube 50 is not damaged.
Since the fuse 12 utilizes a phenomenon in which the direction in which the inner peripheral portion 76a of the washer 76 is bent changes, when an overcurrent flows through the fuse 12, the arc extinguishing tube 85 easily moves downward, and therefore, the volume in the sealed space 84 can be increased at an initial stage, and the pressure in the sealed space 84 can be reduced. Since the small diameter portion 85a is formed with the cutout portion 85c, the inner peripheral portion 76a of the washer 76 does not contact the small diameter portion 85 a. By providing the small diameter portion 85a with the cutout portion 85c, it is possible to suppress the change in the upward bending of the inner peripheral portion 76a from being hindered.
(embodiment 2)
Referring to FIG. 9, a fuse 112 is illustrated. The fuse 112 is a modification of the fuse 12, and the structure of the arc-extinguishing tube 185 is different from: the configuration of the arc tube 85 used with the fuse 12. The same components as the fuse 12 are assigned the same reference numerals as those assigned to the fuse 12, and the description of the fuse 112 is omitted.
The arc extinguishing pipe 185 includes a small diameter portion 185a and a large diameter portion 185 b. The small diameter portion 185a is provided at the end on the crown portion 70a side. The small diameter portion 185a is formed by inserting and fixing a metal cylinder 186 into an end (upper end) of the large diameter portion 185 b. That is, the arc-extinguishing tube 185 is formed by a 1 st cylinder (large-diameter portion 185b) having a constant inner diameter from one end to the other end, and a 2 nd cylinder (cylinder 186) having a length in the axial direction shorter than that of the 1 st cylinder and a smaller diameter than that of the 1 st cylinder. Specifically, the columnar portion 70b of the head metal 70 is inserted through the upper end of the cylindrical body 186, and the washer 76 is press-fitted and fixed to the columnar portion 70 b. The columnar portion 70b and the cylindrical body 186 of the head metal fitting 70 are inserted through the upper end of the large diameter portion 185b of the arc extinguishing pipe 185, and the outer circumferential surface of the cylindrical body 186 and the inner circumferential surface on the upper end side of the large diameter portion 185b are fixed by adhesion. Even in the fuse 112, the cylindrical portion 70b is inserted into the cylindrical body 186, and the washer 76 is fixed to the cylindrical portion 70b, so that the arc extinguishing tube 185 can rotate relative to the head metal fitting 70. The outer peripheral surface of the columnar portion 70b and the inner peripheral surface of the cylindrical body 186 may be fixed by adhesion or the like.
(embodiment 3)
Referring to FIG. 10, a fuse 212 is illustrated. The fuse 212 is a modification of the fuses 12 and 112, and the shape of the arc extinguishing tube 285 is different from: the shape of the arc chute 85, 185 used in the fuse 12, 112. The same components as the fuses 12 and 112 are assigned the same reference numerals as those assigned to the fuses 12 and 112, and the description of the fuse 212 will be omitted.
The arc extinguishing pipe 285 includes a small diameter portion 285a and a large diameter portion 285 b. The small diameter portion 285a is provided at the end on the crown portion 70a side. The small diameter portion 285a is formed by inserting and fixing a metal cylinder 186 into an end (upper end) of the large diameter portion 285 b. That is, the arc extinguishing pipe 285 is formed by the 1 st cylinder (the large diameter portion 285b) and the 2 nd cylinder (the cylinder 186) having a length in the axial direction shorter than that of the 1 st cylinder and a smaller diameter than that of the 1 st cylinder. Further, a tapered inclined portion 285c is provided on the inner surface of the large diameter portion 285b on the upper side (the crown portion 70a side) so as to surround 1 circumference in the circumferential direction. The inclined portion 285c is adjusted to 1/2-2/3 of the length of the cylinder 186. The inner diameter (maximum diameter) of the inclined portion 285c is formed to be 1.1 to 1.2 times the inner diameter of the large-diameter portion 285b of the portion where the inclined portion 285c is not provided, so that the inner diameter of the inclined portion 285c increases toward the top portion 70a of the head metal 70. Accordingly, a tapered inclined portion 285c is provided on the inner circumferential surface of the large diameter portion 285b at a portion (the head top portion 70a side) of the outer circumferential surface of the cylindrical body 186 facing the inner surface of the large diameter portion 285 b.
In the arc extinguishing pipe 285, the columnar portion 70b of the head metal 70 is inserted through the upper end of the cylindrical body 186, and the gasket 76 is press-fitted and fixed to the columnar portion 70 b. The columnar portion 70b and the cylindrical body 186 of the head metal 70 are inserted through the upper end of the large diameter portion 285b of the arc extinguishing pipe 285, and the outer peripheral surface of the cylindrical body 186 and the inner peripheral surface of the large diameter portion 285b (the inner peripheral surface including the inclined portion 285 c) are fixed by adhesion. In addition, the inclined portion 285c prevents the adhesive from being scraped off when the lower end of the cylindrical body 186 is inserted through the upper end of the large diameter portion 285b, and contributes to strengthening the adhesive force between the cylindrical body 186 and the large diameter portion 285 b.
Although specific examples of the present invention have been described in detail above, these are merely examples and do not limit the scope of the claims. The technology recited in the claims includes modifications and variations of the specific examples described above. The technical elements described in the present specification or drawings may be used alone or in various combinations to exhibit technical usefulness, and are not limited to the combinations described in the claims at the time of filing. In addition, the techniques exemplified in the present specification or the drawings can achieve a plurality of objects at the same time, and achieving one of the objects has technical usefulness by itself.
Claims (7)
1. A fuse for a high-voltage fuse, which is arranged between an upper electrode and a lower electrode in a high-voltage fuse having the upper electrode connected to a distribution line and the lower electrode connected to a wiring on a high-voltage device side,
the fuse for a high-voltage fuse includes: a head metal member connected to the upper electrode and having a head top portion and a columnar portion, a lower connection line connected to the lower electrode, a fusible link line connected between the head metal member and the lower connection line, and a cylindrical arc-extinguishing tube surrounding the fusible link line,
the top of the head is positioned outside the arc extinguishing pipe,
the columnar portion extends from the top of the head toward the arc extinguishing tube,
an internal pressure adjusting component is fixed on the columnar part in the arc extinguishing pipe,
the arc extinguishing pipe is fixed to the head metal fitting by the internal pressure adjusting member.
2. The fuse for a high voltage fuse according to claim 1,
the arc extinguishing tube has: a small diameter part through which the columnar part is inserted and which is positioned at the head top end part of the columnar part, and a large diameter part having an inner diameter larger than that of the small diameter part,
the internal pressure adjusting member is fixed to the columnar portion in the large diameter portion.
3. The fuse for a high voltage fuse according to claim 1 or 2,
a gap is provided at the boundary between the small diameter portion and the large diameter portion of the arc extinguishing pipe and on the inner peripheral surface of the small diameter portion.
4. A fuse for a high voltage fuse according to any one of claims 1 to 3,
the inner peripheral portion of the inner pressure adjustment member is fixed in a state of being bent in a direction away from the head top.
5. The fuse for a high voltage fuse according to any one of claims 1 to 4,
the internal pressure adjusting member is made of metal.
6. The fuse for a high voltage fuse according to claim 2,
the small diameter portion is formed by fixing a cylinder body separate from the large diameter portion to the inner peripheral surface of the large diameter portion.
7. The fuse for a high voltage fuse according to claim 6,
the outer peripheral surface of the cylindrical body is provided with an inclined portion on the inner peripheral surface of the large diameter portion at a portion opposed to the inner peripheral surface of the large diameter portion.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2020190326 | 2020-11-16 | ||
| JP2020-190326 | 2020-11-16 | ||
| JP2021031931A JP7383658B2 (en) | 2020-11-16 | 2021-03-01 | Fuse for high pressure blower |
| JP2021-031931 | 2021-03-01 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114512377A true CN114512377A (en) | 2022-05-17 |
| CN114512377B CN114512377B (en) | 2024-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110319932.2A Active CN114512377B (en) | 2020-11-16 | 2021-03-25 | Fuse for high voltage fuse |
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| CN (1) | CN114512377B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB442709A (en) * | 1933-05-13 | 1936-02-10 | Schweitzer & Conrad Inc | Improvements in or relating to the quenching of arcs |
| JPS5727530A (en) * | 1980-07-25 | 1982-02-13 | Kansai Electric Power Co | High voltage cutout fuse |
| CN2919510Y (en) * | 2006-04-27 | 2007-07-04 | 连喜军 | High voltage drop-out type fuse with zero damping |
| TWM324273U (en) * | 2007-05-09 | 2007-12-21 | Energy Support Corp | High voltage fusing apparatus |
| CN201226331Y (en) * | 2008-04-11 | 2009-04-22 | 上海电力带电作业技术开发有限公司 | Pagoda type insulation fuse |
| CN101635233A (en) * | 2008-07-24 | 2010-01-27 | 上海市电力公司 | Insulating enclosed type pagoda-shaped fuse |
| JP2014167874A (en) * | 2013-02-28 | 2014-09-11 | Energy Support Corp | Cylindrical cutout |
| JP2020061334A (en) * | 2018-10-12 | 2020-04-16 | エナジーサポート株式会社 | Fuse for high pressure cutter |
-
2021
- 2021-03-25 CN CN202110319932.2A patent/CN114512377B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB442709A (en) * | 1933-05-13 | 1936-02-10 | Schweitzer & Conrad Inc | Improvements in or relating to the quenching of arcs |
| US2091424A (en) * | 1933-05-13 | 1937-08-31 | Schweitzer & Conrad Inc | Fuse |
| JPS5727530A (en) * | 1980-07-25 | 1982-02-13 | Kansai Electric Power Co | High voltage cutout fuse |
| CN2919510Y (en) * | 2006-04-27 | 2007-07-04 | 连喜军 | High voltage drop-out type fuse with zero damping |
| TWM324273U (en) * | 2007-05-09 | 2007-12-21 | Energy Support Corp | High voltage fusing apparatus |
| CN201226331Y (en) * | 2008-04-11 | 2009-04-22 | 上海电力带电作业技术开发有限公司 | Pagoda type insulation fuse |
| CN101635233A (en) * | 2008-07-24 | 2010-01-27 | 上海市电力公司 | Insulating enclosed type pagoda-shaped fuse |
| JP2014167874A (en) * | 2013-02-28 | 2014-09-11 | Energy Support Corp | Cylindrical cutout |
| JP2020061334A (en) * | 2018-10-12 | 2020-04-16 | エナジーサポート株式会社 | Fuse for high pressure cutter |
| CN111048371A (en) * | 2018-10-12 | 2020-04-21 | 日本能源服务株式会社 | Fuse for high-voltage fuse |
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| Publication number | Publication date |
|---|---|
| CN114512377B (en) | 2024-04-05 |
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