CN113889328B - Commercial power supply transformer with short-circuit protection function - Google Patents
Commercial power supply transformer with short-circuit protection function Download PDFInfo
- Publication number
- CN113889328B CN113889328B CN202111326885.0A CN202111326885A CN113889328B CN 113889328 B CN113889328 B CN 113889328B CN 202111326885 A CN202111326885 A CN 202111326885A CN 113889328 B CN113889328 B CN 113889328B
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- circuit protection
- bin
- short
- transformer
- electrically connected
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- 230000007246 mechanism Effects 0.000 claims abstract description 31
- 238000005192 partition Methods 0.000 claims abstract description 5
- 238000007599 discharging Methods 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims description 8
- 238000012423 maintenance Methods 0.000 claims description 7
- 239000000919 ceramic Substances 0.000 claims description 3
- 238000004804 winding Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F30/00—Fixed transformers not covered by group H01F19/00
- H01F30/06—Fixed transformers not covered by group H01F19/00 characterised by the structure
- H01F30/12—Two-phase, three-phase or polyphase transformers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
- H01F2027/406—Temperature sensor or protection
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Fuses (AREA)
Abstract
The invention discloses a commercial power supply transformer with a short-circuit protection function, which comprises a transformer main body, wherein a box body is arranged at the upper part of the transformer main body, a partition board is arranged in the box body, and an inner cavity of the box body is divided into an incoming line bin and an outgoing line bin by the partition board; the wire inlet bin is provided with three wire inlet guide posts which are electrically connected with the wire inlet side of the transformer main body in a three-phase corresponding manner, and the wire inlet guide posts are electrically connected with the low-voltage side wires through a short-circuit protection mechanism; the outlet bin is provided with three outlet guide posts which are correspondingly and electrically connected with the outlet side of the transformer main body in a three-phase manner, and the outlet guide posts are electrically connected with the high-voltage side wires through a short-circuit protection mechanism. The transformer can be broken when each phase of the transformer is short-circuited, so that the transformer is not burnt out, the fuse in the short-circuit protection mechanism is convenient to install, the fuse is firmly fixed, and the shaking of the fuse can be avoided; in addition, SF6 gas is filled in the inlet wire bin and the outlet wire bin, so that the arc extinguishing device has excellent arc extinguishing performance.
Description
Technical Field
The invention relates to the technical field of transformers, in particular to a commercial power supply transformer with a short-circuit protection function.
Background
As is known, a transformer consists of an iron core (or magnetic core) and a coil having two or more windings, wherein the winding to which a power supply is connected is called a primary winding, and the remaining windings are called secondary windings, and is a device for changing an ac voltage by using the principle of electromagnetic induction. When the transformer suffers sudden short circuit, the high-voltage side and the low-voltage side are subjected to large short circuit current, so that the transformer is damaged, and therefore, a fuse is usually arranged on the high-voltage side and the low-voltage side of the distribution transformer, the fuse is troublesome to install and fix, and the distribution transformer cannot be firmly fixed after being inserted and installed.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the existing defects, and provide the commercial power supply transformer with the short-circuit protection function, wherein each phase of the transformer can be broken when being short-circuited, so that the transformer is not burnt out, and the fuse in the short-circuit protection mechanism is convenient to install, is firmly fixed and can be prevented from shaking; in addition, SF6 gas is filled in the inlet wire bin and the outlet wire bin, so that the high-efficiency gas-insulated wire has excellent arc extinguishing performance, and the problem in the background technology can be effectively solved.
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a commercial power supply transformer with short-circuit protection function, includes the transformer main part, the upper portion of transformer main part is equipped with the box, and the inside of box is equipped with the baffle, and the baffle divides into inlet wire storehouse and outlet wire storehouse with the inner chamber of box; the wire inlet bin is provided with three wire inlet guide posts which are electrically connected with the wire inlet side of the transformer main body in a three-phase corresponding manner, and the wire inlet guide posts are electrically connected with the low-voltage side wires through a short-circuit protection mechanism; the outlet bin is provided with three outlet guide posts which are correspondingly and electrically connected with the outlet side of the transformer main body in a three-phase manner, and the outlet guide posts are electrically connected with the high-voltage side wires through a short-circuit protection mechanism;
the short-circuit protection mechanism comprises a shell and a cover plate which are matched, wherein two connecting plates are symmetrically arranged in the shell up and down, a fuse is inserted between the two connecting plates, and a pressing mechanism for fixing the fuse is arranged on one side of the cover plate, which is opposite to the inner side of the shell; the pressing mechanism comprises a sliding rod, a rod body of the sliding rod is in sliding fit with two sliding sleeves, each sliding sleeve is hinged with one end of a connecting rod, and the other ends of the two connecting rods are hinged with the same pressing plate; the both ends of slide bar all are connected with the apron through the fixed plate, the pole body both sides of slide bar have all been cup jointed and have been made the spring that two sliding sleeves are close to relatively, and the one end and the fixed plate of spring are contradicted, and the other end and the sliding sleeve of spring are inconsistent.
Preferably, two maintenance sealing doors are arranged on one side of the box body, and the two maintenance sealing doors correspond to the wire inlet bin and the wire outlet bin respectively.
Preferably, two air charging and discharging pipes are arranged on one side of the box body, the two air charging and discharging pipes are correspondingly communicated with the wire inlet bin and the wire outlet bin respectively, and a stop valve is arranged on the air charging and discharging pipes.
Preferably, one end of one connecting plate of the short-circuit protection mechanism in the wire inlet bin extends out of the shell and is electrically connected with the low-voltage side wire, and one end of the other connecting plate extends out of the shell and is electrically connected with the wire inlet guide post; one end of one connecting plate of the short-circuit protection mechanism in the outlet bin extends out of the shell and is electrically connected with the high-voltage side lead, and one end of the other connecting plate extends out of the shell and is electrically connected with the outlet guide post.
Preferably, the two connecting plates are all L-shaped, and the opposite ends of the two connecting plates are provided with slots for inserting the two ends of the fuse.
Preferably, the pressing plate is made of insulating ceramic, and a clamping groove matched with the fuse is formed in one side of the pressing plate.
Preferably, the housing and the cover plate are fixed by a plurality of sets of bolts and nuts.
Preferably, the inlet bin and the outlet bin of the box body are filled with SF6 gas.
Compared with the prior art, the invention has the beneficial effects that: according to the commercial power supply transformer with the short-circuit protection function, the short-circuit protection mechanisms are arranged on the three phases of the incoming line side and the outgoing line side of the transformer, the transformer can be broken when each phase of the transformer is short-circuited, the transformer is prevented from being burnt out, the fuse in the short-circuit protection mechanism is convenient to install, the fuse is in plug-in fit with two connecting plates, the cover plate is matched with the shell, the pressing plate is matched with the fuse, the other ends of the two connecting plates push the sliding sleeve to be relatively far away along the sliding rod, the sliding sleeve is limited by spring acting forces on the two sides, the pressing plate presses the fuse, the fuse is prevented from shaking, and the installation and the fixation are simple; in addition, SF6 gas is filled in the inlet wire bin and the outlet wire bin, so that the arc extinguishing device has excellent arc extinguishing performance.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic diagram of a short-circuit protection mechanism according to the present invention;
Fig. 3 is a side view of the case of the present invention.
In the figure: the transformer comprises a transformer main body 1, a box body 2, a wire inlet bin 2.1, a wire outlet bin 2.2, a partition plate 2.3, a 2.4 overhaul sealing door, a wire inlet guide column 3, a low-voltage side wire 4, a high-voltage side wire 5, a wire outlet guide column 6, a gas charging and discharging pipe 7, a connecting plate 8, a shell 9, a pressing plate 10, a pressing plate 11, a connecting rod 12, a bolt 13, a nut 14, a sliding rod 15, a sliding sleeve 16, a spring 17, a fixing plate 18, a cover plate 19 and a slot 20.
Detailed Description
In the description, it should be understood that, if there is an azimuth or positional relationship indicated by terms such as "upper", "lower", "front", "rear", "left", "right", etc., the drawings merely correspond to the drawings of the present invention, and in order to facilitate description of the present invention, it is not indicated or implied that the device or element referred to must have a specific azimuth:
Referring to fig. 1-3, the present invention provides a technical solution: the utility model provides a commercial power supply transformer with short-circuit protection function, includes transformer main part 1, and the upper portion of transformer main part 1 is equipped with box 2, and the inside of box 2 is equipped with baffle 2.3, and baffle 2.3 divides the inner chamber of box 2 into inlet wire storehouse 2.1 and outlet wire storehouse 2.2; the wire inlet bin 2.1 is provided with three wire inlet guide posts 3 which are correspondingly and electrically connected with the wire inlet side of the transformer main body 1 in a three-phase manner, and the wire inlet guide posts 3 are electrically connected with the low-voltage side wires 4 through a short-circuit protection mechanism; the outlet bin 2.2 is provided with three outlet guide posts 6 which are correspondingly and electrically connected with the three phases of the outlet side of the transformer main body 1, and the outlet guide posts 6 are electrically connected with the high-voltage side lead 5 through a short-circuit protection mechanism; three low-voltage side wires 4 in the wire inlet bin 2.1 are connected with three wire inlet guide posts 3 through corresponding short-circuit protection mechanisms to form a low-voltage side three-phase wire inlet of the transformer main body 1; three high-voltage side wires 5 in the wire outlet bin 2.2 are connected with three wire outlet guide posts 6 through corresponding short-circuit protection mechanisms to form three-phase wire outlet on the high-voltage side of the transformer main body 1; by correspondingly installing the short-circuit protection mechanism on the low-voltage side three phase and the high-voltage side three phase of the transformer main body, each phase of the transformer main body 1 can be disconnected when being short-circuited, so that the transformer is ensured not to be burnt out;
As shown in fig. 2, the short-circuit protection mechanism comprises a shell 9 and a cover plate 19 which are matched with each other, wherein two connecting plates 8 are symmetrically arranged in the shell 8 up and down, a fuse 11 is inserted between the two connecting plates 8, and a pressing mechanism for fixing the fuse 11 is arranged on one side of the cover plate 19 opposite to the inner side of the shell 9; the pressing mechanism comprises a slide bar 15, a bar body of the slide bar 15 is in sliding fit with two sliding sleeves 16, each sliding sleeve 16 is hinged with one end of a connecting rod 12, and the other ends of the two connecting rods 12 are hinged with the same pressing plate 10; the two ends of the slide bar 15 are connected with the cover plate 19 through the fixed plate 18, the two sides of the bar body of the slide bar 15 are sleeved with springs 17 which enable the two sliding sleeves 16 to be relatively close, one end of each spring 17 is abutted against the fixed plate 18, and the other end of each spring 17 is abutted against each sliding sleeve 16;
It can be understood that when the cover plate 19 is matched with the shell 9, the pressing plate 10 is matched with the fuse 11, the other ends of the two connecting rods 12 push the sliding sleeve 16 to be relatively far away along the sliding rod 15, the acting force of the springs 17 at two sides is limited, the pressing plate 10 presses the fuse 11, the fuse 11 is prevented from shaking, the installation and the fixation are simple, and the fuse is convenient to take out;
As shown in fig. 3, two maintenance sealing doors 2.4 are arranged on one side of the box body 2, the two maintenance sealing doors 2.4 respectively correspond to the wire inlet bin 2.1 and the wire outlet bin 2.2, and the fuses 11 in the wire inlet bin 2.1 and the wire outlet bin 2.2 can be replaced by opening the corresponding maintenance sealing doors 2.4;
Two air charging and discharging pipes 7 are arranged on one side of the box body 2, the two air charging and discharging pipes 7 are correspondingly communicated with the wire inlet bin 2.1 and the wire outlet bin 2.2 respectively, and a stop valve is arranged on the air charging and discharging pipes 7; the incoming line bin 2.1 and the outgoing line bin 2.2 of the box body 2 are filled with SF6 gas; when the fuse 11 needs to be replaced, the SF6 gas in the fuse is discharged through the gas charging and discharging pipe 7, and the SF6 gas is filled through the gas charging and discharging pipe 7 after the replacement is finished;
Further, one end of one connecting plate 8 of the short-circuit protection mechanism in the wire inlet bin 2.1 extends out of the shell 9 and is electrically connected with the low-voltage side wire 4, and one end of the other connecting plate 8 extends out of the shell 9 and is electrically connected with the wire inlet guide post 3; one end of one connecting plate 8 of the short-circuit protection mechanism in the outlet bin 2.2 extends out of the shell 9 and is electrically connected with the high-voltage side lead 5, and one end of the other connecting plate 8 extends out of the shell 9 and is electrically connected with the outlet guide post 6;
in order to facilitate the installation of the fuse 11, the two connecting plates 8 are L-shaped, and slots 20 for inserting the two ends of the fuse 11 are arranged at the opposite ends of the two connecting plates 8;
In order to better fix the fuse 11, the pressing plate 10 is made of insulating ceramic, and a clamping groove matched with the fuse 11 is formed in one side of the pressing plate 10;
Further, the housing 9 and the cover plate 19 are fixed by a plurality of sets of bolts 13 and nuts 14.
The invention has not been described in detail in the prior art, and it is apparent to those skilled in the art that the invention is not limited to the details of the above-described exemplary embodiments, but that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics thereof; the above-described embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (8)
1. The utility power supply transformer with the short-circuit protection function comprises a transformer main body (1), and is characterized in that: the upper part of the transformer main body (1) is provided with a box body (2), a partition board (2.3) is arranged in the box body (2), and the partition board (2.3) divides the inner cavity of the box body (2) into an incoming line bin (2.1) and an outgoing line bin (2.2); the wire inlet bin (2.1) is provided with three wire inlet guide posts (3) which are correspondingly and electrically connected with the wire inlet side of the transformer main body (1), and the wire inlet guide posts (3) are electrically connected with the low-voltage side wires (4) through a short-circuit protection mechanism; the outlet bin (2.2) is provided with three outlet guide posts (6) which are correspondingly and electrically connected with the outlet side of the transformer main body (1), and the outlet guide posts (6) are electrically connected with the high-voltage side lead (5) through a short-circuit protection mechanism;
the short-circuit protection mechanism comprises a shell (9) and a cover plate (19) which are matched with each other, wherein two connecting plates (8) are symmetrically arranged in the shell (8) up and down, a fuse (11) is inserted between the two connecting plates (8), and one side of the cover plate (19) is opposite to the inner side of the shell (9) and is provided with a pressing mechanism for fixing the fuse (11); the compressing mechanism comprises a sliding rod (15), a rod body of the sliding rod (15) is in sliding fit with two sliding sleeves (16), one end of a connecting rod (12) is hinged to each sliding sleeve (16), and the other ends of the two connecting rods (12) are hinged to the same pressing plate (10); the two ends of the sliding rod (15) are connected with the cover plate (19) through the fixing plate (18), springs (17) which enable the two sliding sleeves (16) to be relatively close to each other are sleeved on two sides of the rod body of the sliding rod (15), one end of each spring (17) is in contact with the fixing plate (18), and the other end of each spring (17) is in contact with each sliding sleeve (16).
2. A mains supply transformer with short circuit protection according to claim 1, characterized in that: two maintenance sealing doors (2.4) are arranged on one side of the box body (2), and the two maintenance sealing doors (2.4) respectively correspond to the wire inlet bin (2.1) and the wire outlet bin (2.2).
3. A mains supply transformer with short circuit protection according to claim 1, characterized in that: one side of the box body (2) is provided with two air charging and discharging pipes (7), the two air charging and discharging pipes (7) are correspondingly communicated with the wire inlet bin (2.1) and the wire outlet bin (2.2) respectively, and the air charging and discharging pipes (7) are provided with stop valves.
4. A mains supply transformer with short circuit protection according to claim 1, characterized in that: one end of one connecting plate (8) of the short-circuit protection mechanism in the wire inlet bin (2.1) extends out of the shell (9) and is electrically connected with the low-voltage side wire (4), and one end of the other connecting plate (8) extends out of the shell (9) and is electrically connected with the wire inlet guide post (3); one end of one connecting plate (8) of the short-circuit protection mechanism in the outlet bin (2.2) extends out of the shell (9) and is electrically connected with the high-voltage side lead (5), and one end of the other connecting plate (8) extends out of the shell (9) and is electrically connected with the outlet guide post (6).
5. A mains supply transformer with short circuit protection according to claim 1, characterized in that: the two connecting plates (8) are L-shaped, and slots (20) for inserting two ends of the fuse (11) are formed in the opposite ends of the two connecting plates (8).
6. A mains supply transformer with short circuit protection according to claim 1, characterized in that: the pressing plate (10) is made of insulating ceramic, and a clamping groove matched with the fuse (11) is formed in one side of the pressing plate (10).
7. A mains supply transformer with short circuit protection according to claim 1, characterized in that: the shell (9) and the cover plate (19) are fixed through a plurality of groups of bolts (13) and nuts (14).
8. A mains supply transformer with short circuit protection according to claim 1, characterized in that: and SF6 gas is filled in both the incoming line bin (2.1) and the outgoing line bin (2.2) of the box body (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111326885.0A CN113889328B (en) | 2021-11-10 | 2021-11-10 | Commercial power supply transformer with short-circuit protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111326885.0A CN113889328B (en) | 2021-11-10 | 2021-11-10 | Commercial power supply transformer with short-circuit protection function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113889328A CN113889328A (en) | 2022-01-04 |
| CN113889328B true CN113889328B (en) | 2024-05-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111326885.0A Active CN113889328B (en) | 2021-11-10 | 2021-11-10 | Commercial power supply transformer with short-circuit protection function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113889328B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102522278A (en) * | 2011-12-29 | 2012-06-27 | 廊坊北熔电气有限公司 | Fuse |
| CN104852304A (en) * | 2015-06-16 | 2015-08-19 | 国网山西省电力公司电力科学研究院 | Adjustable installation support for drop-out fuse |
| CN207409876U (en) * | 2017-11-27 | 2018-05-25 | 国网江苏省电力公司南通供电公司 | New rural power grids low-tension distribution box |
| CN207705140U (en) * | 2017-12-11 | 2018-08-07 | 甘肃机电职业技术学院 | A kind of guard box of fuse |
| CN208521731U (en) * | 2018-08-13 | 2019-02-19 | 河南万锦电气设备有限公司 | A kind of transformer of built-in fuse |
| CN208580711U (en) * | 2018-06-14 | 2019-03-05 | 中网电力科技有限公司 | A kind of fuse switch |
| CN209571814U (en) * | 2017-12-19 | 2019-11-01 | 国网安徽省电力有限公司蚌埠供电公司 | A kind of high voltage isolating transformer protective device being suitable for radio area |
| CN112967915A (en) * | 2020-09-18 | 2021-06-15 | 崔卫 | 10kv high-voltage fuse |
| CN213660337U (en) * | 2020-12-10 | 2021-07-09 | 天津世通电子科技有限公司 | Fuse box with dampproofing function and convenient to detach |
-
2021
- 2021-11-10 CN CN202111326885.0A patent/CN113889328B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102522278A (en) * | 2011-12-29 | 2012-06-27 | 廊坊北熔电气有限公司 | Fuse |
| CN104852304A (en) * | 2015-06-16 | 2015-08-19 | 国网山西省电力公司电力科学研究院 | Adjustable installation support for drop-out fuse |
| CN207409876U (en) * | 2017-11-27 | 2018-05-25 | 国网江苏省电力公司南通供电公司 | New rural power grids low-tension distribution box |
| CN207705140U (en) * | 2017-12-11 | 2018-08-07 | 甘肃机电职业技术学院 | A kind of guard box of fuse |
| CN209571814U (en) * | 2017-12-19 | 2019-11-01 | 国网安徽省电力有限公司蚌埠供电公司 | A kind of high voltage isolating transformer protective device being suitable for radio area |
| CN208580711U (en) * | 2018-06-14 | 2019-03-05 | 中网电力科技有限公司 | A kind of fuse switch |
| CN208521731U (en) * | 2018-08-13 | 2019-02-19 | 河南万锦电气设备有限公司 | A kind of transformer of built-in fuse |
| CN112967915A (en) * | 2020-09-18 | 2021-06-15 | 崔卫 | 10kv high-voltage fuse |
| CN213660337U (en) * | 2020-12-10 | 2021-07-09 | 天津世通电子科技有限公司 | Fuse box with dampproofing function and convenient to detach |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113889328A (en) | 2022-01-04 |
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