CN215007846U - External bushing type current transformer device for mobile transformer - Google Patents
External bushing type current transformer device for mobile transformer Download PDFInfo
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- CN215007846U CN215007846U CN202121305493.1U CN202121305493U CN215007846U CN 215007846 U CN215007846 U CN 215007846U CN 202121305493 U CN202121305493 U CN 202121305493U CN 215007846 U CN215007846 U CN 215007846U
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Abstract
An external bushing type current transformer device for a movable transformer relates to the field of transformers. The novel movable transformer is mainly designed for solving the problems that the time and the labor are wasted when the existing movable transformer is replaced by the sleeve type current transformer. The inner cylinder is welded on the lower bottom plate; there is first flange at the inner tube top, is stained with the cushion on the cardboard, and the cardboard encloses in the inner tube outside, and the urceolus lower extreme welds on the lower plate, and there is the second flange at urceolus top, and the urceolus lower part has the oil discharge outlet, and cardboard outside cover has a plurality of current transformer, and the upper cover plate has the opening, and the upper cover plate passes through bolted connection with first flange, second flange, sets up sealed the pad and can prevent that insulating oil from leaking. The upper cover plate is provided with an air relief plug. The terminal box is fixed on the outer barrel, a terminal block of the terminal box is provided with a terminal, and a secondary outlet of the current transformer is fixed at the inner end of the terminal by a cable head. The advantage is that it is convenient to change current transformer.
Description
The technical field is as follows:
the utility model relates to a transformer field specifically relates to a remove external bushing type current transformer device for transformer.
Background art:
the current transformer consists of a closed iron core and a winding, the number of turns of a primary winding of the current transformer is small, the current transformer is connected in series in a current circuit to be measured, the turn ratio of a secondary winding is large, and the current transformer is connected in series in a measuring instrument and a protection loop. The current transformer is a sensor for acquiring current information of an electric primary loop by secondary equipment such as a measuring instrument and relay protection in an electric power system, and mainly has the function of converting large current in an alternating current circuit into small current with a certain proportion, wherein the primary side of the current is connected with a primary system, and the secondary side of the current is connected with the measuring instrument and the relay protection.
In the oil-immersed power transformer, the insulation mainly adopts an oil immersion type, and the current transformer adopts a sleeve type current transformer, namely, the current transformer is sleeved at the position between a winding outgoing line and the tail part of a sleeve, so that the insulation performance is good; conventionally, a current transformer is placed by a lifting seat between a cover of an oil tank and a sleeve.
The mobile substation is mainly used for emergency power utilization, maintenance power utilization, temporary power utilization, building power utilization, seasonal power utilization, engineering power utilization and war backup power utilization. Because the mobile transformer substation is not a network-hung operation device, but is a standby device flexibly and reliably suitable for various emergency, temporary or stage and special occasions, the parameters of the current transformer of the mobile transformer are changeable, if a lifting seat needs to be opened for replacing a sleeve-type current transformer, oil in an oil tank contacts with air, the insulating property of the transformer oil is reduced, and the oil in the whole oil tank needs to be filtered again, so that time and labor are wasted.
The invention content is as follows:
the utility model aims to solve the technical problem that it is convenient to change current transformer through a scene, and the time saving reduces the external bushing type current transformer device for the mobile transformer of transformer oil loss.
The above object is achieved by: the transformer oil tank bottom plate comprises a bottom plate, wherein bottom feet are welded on the lower surface of the bottom plate and are fixed with a support at the lower part of a transformer oil tank through bolts, a hole is formed in the middle of the bottom plate, an inner cylinder is arranged outside the circumference of the hole, namely the lower edge of the inner cylinder is welded on the bottom plate outside the hole, and the inner cylinder and the hole have the same circle center; the top of the inner barrel is provided with a first flange, the first flange is provided with a plurality of threaded holes which do not penetrate through the flange, the inner barrel further comprises a paper board, a plurality of cushion blocks are adhered to the paper board, the paper board is enclosed into a circular shape and sleeved outside the inner barrel, and the cushion blocks are in contact with the inner barrel to play an insulating role. The outer cylinder is arranged outside the inner cylinder, the lower end of the outer cylinder is welded on the lower bottom plate, the second flange is fixed at the top of the outer cylinder, the oil drain port is formed in the lower portion of the outer cylinder, the oil drain plug is installed on the oil drain port, insulating oil is filled in the space between the inner cylinder and the outer cylinder, the plurality of current transformers are sleeved on the outer side of the paperboard, and the current transformers are arranged in the insulating oil.
The upper cover plate is provided with an opening at a position corresponding to the hole of the first flange, the upper cover plate is connected with the first flange through a bolt, and an annular sealing gasket is arranged between the upper cover plate and the first flange. The upper cover plate is connected with the second flange through bolts, and a sealing gasket is arranged between the upper cover plate and the second flange. The provision of the gasket prevents leakage of the insulating oil. An air relief plug is arranged on the upper cover plate between the inner cylinder and the outer cylinder.
The terminal box is fixed on the outer barrel, a terminal board is arranged on the terminal box, a binding post which is communicated with the inside and the outside is arranged on the terminal board, a cable head for secondary outgoing of the current transformer is fixed at the inner end of the binding post, and the outer end of the binding post is led to a terminal box or a user using end by a cable.
The leading-out cable of the medium-voltage elbow type sleeve and the leading-out cable of the low-voltage elbow type sleeve are connected to the measuring instrument after passing through the holes of the upper cover plate, the inner cylinder and the lower bottom plate.
The utility model has the advantages that: when the current transformer is replaced or added, only the upper cover plate needs to be opened and the oil needs to be replaced, the device separates the insulating oil from the air, the space is saved, and the replacement of the current transformer is very convenient.
Description of the drawings:
fig. 1 is a schematic front view of the present invention;
fig. 2 is a schematic top view of the present invention;
fig. 3 is a schematic view of the installation state of the present invention.
The specific implementation mode is as follows:
the present invention will be further described with reference to FIGS. 1-3;
the transformer oil tank comprises a lower bottom plate 1, wherein feet 2 are welded on the lower surface of the lower bottom plate and are fixed with a support 17 at the lower part of a transformer oil tank 16 through bolts, a hole 3 is formed in the middle of the lower bottom plate, an inner cylinder 4 is arranged outside the circumference of the hole, namely the lower edge of the inner cylinder is welded on the lower bottom plate outside the hole, and the inner cylinder and the hole have the same circle center; the top of the inner cylinder is provided with a first flange 5, the first flange is provided with a plurality of threaded holes which do not penetrate through the flange, the inner cylinder further comprises a paper board 6, a plurality of cushion blocks 7 are adhered on the paper board, the paper board is enclosed into a circular sleeve and is arranged outside the inner cylinder, and the cushion blocks are contacted with the inner cylinder to play an insulating role. The outer cylinder 8 is arranged outside the inner cylinder, the lower end of the outer cylinder is welded on the lower bottom plate, the second flange 9 is fixed at the top of the outer cylinder, the oil drain hole is formed in the lower portion of the outer cylinder, the oil drain plug 10 is installed on the oil drain hole, insulating oil is filled in the space between the inner cylinder and the outer cylinder, the current transformers 11 are sleeved on the outer side of the paperboard, and the current transformers are arranged in the insulating oil.
The upper cover plate 12 is provided with an opening at a position corresponding to the opening of the first flange, the upper cover plate is connected with the first flange through a bolt, and an annular sealing gasket 14 is arranged between the upper cover plate and the first flange. The upper cover plate is connected with the second flange through bolts, and a sealing gasket is arranged between the upper cover plate and the second flange. The provision of the gasket prevents leakage of the insulating oil. An air relief plug 15 is arranged on the upper cover plate between the inner cylinder and the outer cylinder.
The terminal box 13 is fixed on the outer cylinder, a terminal board is arranged on the terminal box, a binding post which is communicated with the inside and the outside is arranged on the terminal board, a cable head for secondary outgoing of the current transformer is fixed at the inner end of the binding post, and the outer end of the binding post is led to a terminal box or a user using end by a cable.
The leading-out cable 20 of the medium-voltage elbow type sleeve 18 and the leading-out cable of the low-voltage elbow type sleeve 19 are connected to the measuring instrument after passing through the holes of the upper cover plate, the inner cylinder and the lower bottom plate.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (2)
1. The utility model provides a remove external bushing type current transformer device for transformer, includes lower plate (1), and lower surface welding has footing (2) under the lower plate, and the footing passes through the bolt to be fixed characterized by with support (17) of transformer tank (16) lower part: the middle part of the lower bottom plate is provided with a hole (3), the outer part of the circumference of the hole is provided with an inner cylinder (4), namely the lower edge of the inner cylinder is welded on the lower bottom plate outside the hole; the top of the inner cylinder is provided with a first flange (5), the first flange is provided with a plurality of threaded holes which do not penetrate through the flange, the novel electric-heating insulating oil cylinder further comprises a paper board (6), a plurality of cushion blocks (7) are adhered on the paper board, the paper board is enclosed into a circle and sleeved outside the inner cylinder, the cushion blocks are contacted with the inner cylinder, an outer cylinder (8) is arranged outside the inner cylinder, the lower end of the outer cylinder is welded on a lower bottom plate, the top of the outer cylinder is fixedly provided with a second flange (9), the lower part of the outer cylinder is provided with an oil drain hole, an oil drain plug (10) is arranged on the oil drain hole, insulating oil is filled in a space between the inner cylinder and the outer cylinder, the outer side of the paper board is sleeved with a plurality of current transformers (11), and the current transformers are arranged in the insulating oil;
an opening is formed in the position, corresponding to the hole of the first flange, of the upper cover plate (12), the upper cover plate is connected with the first flange through bolts, and the upper cover plate is connected with the second flange through bolts.
2. The external bushing type current transformer device for the traveling transformer as set forth in claim 1, wherein: an annular sealing gasket (14) is arranged between the upper cover plate and the first flange; a sealing gasket is arranged between the upper cover plate and the second flange; an air relief plug (15) is arranged on the upper cover plate positioned between the inner cylinder and the outer cylinder; the terminal box (13) is fixed on the outer cylinder, a terminal board is arranged on the terminal box, a binding post which is communicated with the inside and the outside is arranged on the terminal board, a cable head for secondary outgoing wires of the current transformer is fixed at the inner end of the binding post, and the outer end of the binding post is led to a terminal box or a user using end by a cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121305493.1U CN215007846U (en) | 2021-06-11 | 2021-06-11 | External bushing type current transformer device for mobile transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121305493.1U CN215007846U (en) | 2021-06-11 | 2021-06-11 | External bushing type current transformer device for mobile transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215007846U true CN215007846U (en) | 2021-12-03 |
Family
ID=79132105
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121305493.1U Active CN215007846U (en) | 2021-06-11 | 2021-06-11 | External bushing type current transformer device for mobile transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215007846U (en) |
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2021
- 2021-06-11 CN CN202121305493.1U patent/CN215007846U/en active Active
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