CN101145437A - Low voltage large current outlet three-phase one tank current mutual inductor mounting and shielding structure - Google Patents
Low voltage large current outlet three-phase one tank current mutual inductor mounting and shielding structure Download PDFInfo
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- CN101145437A CN101145437A CNA2006100477552A CN200610047755A CN101145437A CN 101145437 A CN101145437 A CN 101145437A CN A2006100477552 A CNA2006100477552 A CN A2006100477552A CN 200610047755 A CN200610047755 A CN 200610047755A CN 101145437 A CN101145437 A CN 101145437A
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Abstract
The invention belongs to the field of transformer fabrication and specifically relates to a mounting and shielding structure of a three-phase-in-one-tank current transformer at the low-voltage large-current outlet terminal in a high-capacity three-phase transformer. The mounting and shielding structure is positioned above the low-voltage side of the transformer and comprises a low-voltage boosting seat, an electric shield means is arranged and three-phase low-voltage terminals of the transformer are all inserted inside the low-voltage boosting seat, sharing the same boosting seat and introduced outwards from the top of the boosting seat; three current transformers which are covered around the three-phase low-voltage terminals and fixed inside the boosting seat; and isolating shields arranged between the adjacent current transformers and connected with the boosting seat at only one point. The invention has the advantages that the three-phase-in-one-tank current transformer at the low-voltage outlet terminal has compact outlet structure; the electric shielding effect is improved to prevent the occurrence of local overheat; and the isolating shield can efficiently control the influence of magnetic field due to large current on the measurement accuracy of heterophase current transformer and avoid the burning down of the current transformer during long-term operation under high temperature.
Description
Technical field
The invention belongs to transformer manufacture technology, the installation and the shielding construction of specifically a kind of big capacity, three-phase transformer low voltage large current outlet three-phase one tank current mutual inductor.
Background technology
At present, existing big capacity, high-voltage generator transformer, the current transformer of its low-voltage, high-current input all is installed on the female side of the single-phase envelope of generator, as the low-voltage, high-current instrument transformer being installed in the transformer low voltage rising seat, low pressure should be single outlet structure so, can bring influence to local overheating like this.As adopt common box structure just must solve the shielding problem.
Summary of the invention
The object of the present invention is to provide the shared seat that raises of a kind of leading-out terminal three-phase, effectively control installation and the shielding construction of stray magnetic field the transformer low voltage large current outlet three-phase shared tank current transformer of current transformer influence.
The objective of the invention is to be achieved through the following technical solutions:
The present invention is positioned at the top of step down side, comprises the low pressure seat that raises, and electric shielding structure is installed in it, and transformer three-phase low-voltage terminal all inserts low pressure and raises in the seat, the shared seat that raises, and draw by the seat top that raises; All be with the current transformer that is fixed in the low pressure rising seat on the three-phase low-voltage terminal, alternate shielding is installed between the adjacent current transformer, it raises to have and have only a bit between seat with low pressure and is connected.
Wherein: described low pressure rising seat is a body structure, the upper end of its wall and upper cover plate Joint, the lower end is connected with flange, and electric shielding structure is located on the inwall of the inboard of wall and upper cover plate, and transformer three-phase low-voltage terminal passes electric shielding structure and the flange on upper cover plate, the inwall; All be with current transformer on every phase low-voltage terminal, it is positioned at low pressure rising seat, is fixed on the inwall of upper cover plate; Upper surface at upper cover plate is fixed with sleeve closure bus flange; Seat underrun flange removably is equipped with lower cover raising; Described electric shielding structure is the high metallic plate of conductance; Raise between seat inside, the adjacent current instrument transformer in low pressure, be positioned on the barricade of upper cover plate inwall and flange is provided with four groups and connects copper coins, form by two copper coins for every group, four angles of alternate shielding are fixed in by insulating pad and connect on the copper coin, and any point in alternate shielding is connected by connecting line and low pressure rising seat; Raise between seat inside, the adjacent current instrument transformer in low pressure, be positioned on the barricade of upper cover plate inwall and flange is provided with four groups and connects copper coins, form by two copper coins for every group, any three angles in four angles of alternate shielding are fixed in by insulating pad and connect on the copper coin, and another angle is fixed in by the stretching copper coin and connects on the copper coin; Described alternate shielding is the high metallic plate of conductance.
Advantage of the present invention and good effect are:
1. the present invention is low pressure leading-out terminal three-phase combined type, and the shared seat that raises of three-phase outlet terminal makes the outlet structure compactness of transformer low voltage three-phase; Adopt the high metallic plate of conductance as electric shielding structure, not only simple, shield effectiveness but also good had prevented effectively that the phenomenon of local overheating from taking place.
2. the present invention fixes as one current transformer and low pressure rising seat, need not be provided with in addition again, and is more convenient to use; For fear of the influence of the magnetic field that produces because of low-tension current is excessive to out-of-phse current mutual inductor measuring accuracy of measurement, the present invention has adopted alternate shielding, has controlled the influence of the magnetic field of big electric current generation to out-of-phse current mutual inductor measuring accuracy of measurement effectively.
3. structure of the present invention has play a part important to the prolongation in transformer useful life, compact overall structure, controlled simultaneously the influence of magnetic field that big electric current produces again effectively, avoided the influence in great current lead wire magnetic field and make the long-term operation at high temperature of current transformer and the danger of being burnt the out-of-phse current instrument transformer.
Description of drawings
Fig. 1 looks the partial cutaway schematic diagram for master of the present invention;
Fig. 2 is the left view of Fig. 1;
Fig. 3 is the vertical view of Fig. 1;
Fig. 4 is one of scheme of installation of the alternate shielding of the present invention;
Fig. 5 is two of the scheme of installation of the alternate shielding of the present invention;
Fig. 6 is installed in user mode figure on the transformer for the present invention;
Fig. 7 is the left view of Fig. 6.
Embodiment
The invention will be further described below in conjunction with accompanying drawing.
As Fig. 6, shown in Figure 7, the present invention is positioned at the top of step down side, is connected with oil tank of transformer 14.Shown in Fig. 1～3, the present invention includes the low pressure seat 7 that raises, electric shielding structure 4 is installed in it, transformer three-phase low-voltage terminal all inserts low pressure and raises in the seat 7, the shared seat that raises, and draw by the seat top that raises.Low pressure rising seat 7 is a body structure, the upper end of its wall and upper cover plate 1 Joint, and the lower end is connected with flange 8.In order when carrying raises seat, to keep it to put steadily, on the flange 8 of seat bottom surface that raises, lower cover 5 is installed removably, be connected with a plurality of gussets 6 on it.Electric shielding structure 4 is located on the inwall of the inboard of wall and upper cover plate 1, all has three holes on electric shielding structure on upper cover plate 1 and the inwall thereof and the flange 8, is used for transformer three-phase low-voltage terminal and passes.All be with current transformer 9 on every phase low-voltage terminal, it is positioned at low pressure rising seat 7, is fixed on the inwall of upper cover plate 1, and alternate shielding 10 is installed between the adjacent current transformer 9, and it has and have only any to be connected with low pressure rising seat 7.As shown in Figure 4, raise between seat 7 inside, the adjacent current instrument transformer in low pressure, be positioned on the barricade of upper cover plate 1 inwall and flange 8 is provided with four groups and connects copper coins 13, form by two copper coins for every group, 10 4 angles of alternate shielding are fixed in by insulating pad 11 and connect on the copper coin 13, and any point in alternate shielding 10 is connected by connecting line and low pressure rising seat 7.Perhaps as shown in Figure 5, any three angles in 10 4 angles of alternate shielding are fixed in by insulating pad 11 and connect on the copper coin 13, and another angle is fixed in by stretching copper coin 12 and connects on the copper coin 13.Electric shielding structure 4 and alternate shielding 10 are the high metallic plate of conductance, as copper coin or aluminium sheet, use the best results of copper coin.Upper surface at upper cover plate 1 is fixed with sleeve closure bus flange 2.
The present invention by pulling down on the flange 8, is inserted with the three-phase low-voltage terminal of transformer lower cover 5 in use again by three holes on the seat that raises, pass current transformer 9 backs and drawn by the seat top that raises.The seat 7 that then low pressure raise is connected with flange on the oil tank of transformer by flange 8.Connect finish after, get final product by sleeve pipe and enclosed busbar flange 2 mounting sleeves and enclosed busbar on the seat top that raises again.Wherein: the alternate shielding 10 between the adjacent current instrument transformer, it has and has only any to be communicated with low pressure rising seat 7, guaranteed that alternate shielding 10 is idiostatic with low pressure rising seat 7, so, there is not the electric current process in the alternate shielding 10, can not produce eddy current and generate heat, more effectively control the influence of magnetic field that big electric current produces simultaneously, make current transformer can detect the electric current that step-down side passes through exactly current transformer.
Claims (7)
1. the installation of a low voltage large current outlet three-phase one tank current mutual inductor and shielding construction, be positioned at the top of step down side, it is characterized in that: comprise low pressure rising seat (7), electric shielding structure (4) is installed in it, transformer three-phase low-voltage terminal all inserts in the low pressure rising seat (7), the shared seat that raises, and draw by the seat top that raises; All be with the current transformer (9) that is fixed in the low pressure rising seat (7) on the three-phase low-voltage terminal, alternate shielding (10) is installed between the adjacent current transformer (9), it raises to have and have only a bit between seat (7) with low pressure and is connected.
2. press the installation and the shielding construction of the described low voltage large current outlet three-phase one tank current mutual inductor of claim 1, it is characterized in that: described low pressure rising seat (7) is body structure, the upper end of its wall and upper cover plate (1) Joint, the lower end is connected with flange (8), electric shielding structure (4) is located on the inwall of the inboard of wall and upper cover plate (1), and transformer three-phase low-voltage terminal passes electric shielding structure and the flange (8) on upper cover plate (1), the inwall; All be with current transformer (9) on every phase low-voltage terminal, it is positioned at the inwall that low pressure raises (7), is fixed on upper cover plate (1); Upper surface at upper cover plate (1) is fixed with sleeve closure bus flange (2).
3. by the installation and the shielding construction of the described low voltage large current outlet three-phase one tank current mutual inductor of claim 2, it is characterized in that: seat underrun flange (8) removably is equipped with lower cover (5) raising.
4. by claim 1 or 2 described low voltage large current outlet three-phase shared tank electric shielding structures, it is characterized in that: described electric shielding structure (4) is the high metallic plate of conductance.
5. press the installation and the shielding construction of the described low voltage large current outlet three-phase one tank current mutual inductor of claim 1, it is characterized in that: raise between seat (7) inside, the adjacent current instrument transformer in low pressure, be positioned on the barricade of upper cover plate (1) inwall and flange (8) is provided with four groups and connects copper coins (13), form by two copper coins for every group, four angles of alternate shielding (10) are fixed in by insulating pad (11) and connect on the copper coin (13), and any point in alternate shielding (10) is connected by connecting line and low pressure rising seat (7).
6. press the installation and the shielding construction of the described low voltage large current outlet three-phase one tank current mutual inductor of claim 1, it is characterized in that: raise between seat (7) inside, the adjacent current instrument transformer in low pressure, be positioned on the barricade of upper cover plate (1) inwall and flange (8) is provided with four groups and connects copper coins (13), form by two copper coins for every group, any three angles in four angles of alternate shielding (10) are fixed in by insulating pad (11) and connect on the copper coin (13), and another angle is fixed in by stretching copper coin (12) and connects on the copper coin (13).
7. by the installation and the shielding construction of claim 1,5 or 6 described low voltage large current outlet three-phase one tank current mutual inductors, it is characterized in that: described alternate shielding (10) is the high metallic plate of conductance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100477552A CN101145437B (en) | 2006-09-15 | 2006-09-15 | Low voltage large current outlet three-phase one tank current mutual inductor mounting and shielding structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100477552A CN101145437B (en) | 2006-09-15 | 2006-09-15 | Low voltage large current outlet three-phase one tank current mutual inductor mounting and shielding structure |
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| Publication Number | Publication Date |
|---|---|
| CN101145437A true CN101145437A (en) | 2008-03-19 |
| CN101145437B CN101145437B (en) | 2010-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2006100477552A Active CN101145437B (en) | 2006-09-15 | 2006-09-15 | Low voltage large current outlet three-phase one tank current mutual inductor mounting and shielding structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104569515A (en) * | 2014-12-11 | 2015-04-29 | 许继集团有限公司 | Shielding structure and common-tank electronic voltage transformer adopting same |
| CN110890201A (en) * | 2018-09-10 | 2020-03-17 | 特变电工沈阳变压器集团有限公司 | Three-phase shunt reactor lead wire connection structure |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2185919Y (en) * | 1993-09-03 | 1994-12-21 | 曾爱华 | Distribution transformer with anti-sealing electricity function |
| CN2591732Y (en) * | 2002-12-30 | 2003-12-10 | 黄少萍 | Lead-out wire protection box of electric transformer |
| CN2741157Y (en) * | 2004-09-23 | 2005-11-16 | 中电电气集团有限公司 | Low-voltage distributing box of underground transformer |
| CN2770056Y (en) * | 2004-12-24 | 2006-04-05 | 余志东 | Electric capacitive filter |
| CN200962370Y (en) * | 2006-09-15 | 2007-10-17 | 特变电工沈阳变压器集团有限公司技术中心 | Installation and shielding structure of low-voltage high current outline three-phase common box current mutual inductor |
-
2006
- 2006-09-15 CN CN2006100477552A patent/CN101145437B/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104569515A (en) * | 2014-12-11 | 2015-04-29 | 许继集团有限公司 | Shielding structure and common-tank electronic voltage transformer adopting same |
| CN104569515B (en) * | 2014-12-11 | 2017-08-08 | 许继集团有限公司 | A kind of shielding construction and the common case electronic type voltage transformer using this structure |
| CN110890201A (en) * | 2018-09-10 | 2020-03-17 | 特变电工沈阳变压器集团有限公司 | Three-phase shunt reactor lead wire connection structure |
| CN110890201B (en) * | 2018-09-10 | 2022-07-22 | 特变电工沈阳变压器集团有限公司 | Three-phase shunt reactor lead wire connection structure |
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| Publication number | Publication date |
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| CN101145437B (en) | 2010-06-16 |
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Free format text: CORRECT: ADDRESS; FROM: 110025 NO.18, BEIERZHONG ROAD, TIEXI DISTRICT, SHENYANG CITY, LIAONING PROVINCE TO: 110144 NO.32, KAIFA ROAD, SHENYANG ECONOMIC AND TECHNOLOGICAL DEVELOPMENT ZONE |
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Effective date of registration: 20100702 Address after: 110144 Shenyang economic and Technological Development Zone Development Road No. 32 Patentee after: TBEA Shenyang Transformer (Group) Co., Ltd. Address before: 110025 18, No. two middle North Road, Tiexi District, Liaoning, Shenyang Patentee before: Technology Centre, Shenyang Transformer Group Co., Ltd., Tebian Diangong |
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Address after: 110144 Shenyang economic and Technological Development Zone, Liaoning Road, No. 32 Patentee after: TBEA Shenyang Transformer (Group) Co., Ltd. Address before: 110144 Shenyang economic and Technological Development Zone Development Road No. 32 Patentee before: TBEA Shenyang Transformer (Group) Co., Ltd. |