CN201036153Y - Backbone type bus current mutual inductor - Google Patents
Backbone type bus current mutual inductor Download PDFInfo
- Publication number
- CN201036153Y CN201036153Y CNU2007200119425U CN200720011942U CN201036153Y CN 201036153 Y CN201036153 Y CN 201036153Y CN U2007200119425 U CNU2007200119425 U CN U2007200119425U CN 200720011942 U CN200720011942 U CN 200720011942U CN 201036153 Y CN201036153 Y CN 201036153Y
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- primary shielding
- hole
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- primary
- ring
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Abstract
The utility model relates to column-typed busbar current transformator, having an integrated structure formed by casting a ring-shaped iron core, a secondary winding wound around the iron core and a secondary junction box adopting epoxide resin vacuumly and is installed on a panel base arranged with installation holes integratedly. The integrated structure is a cylinder with a through hole arranged in the central section. The through hole is coaxial with the iron core horizontally and used as a bus outlet for passing through a primary high-voltage bus. A primary shielding ring is arranged on the cylindrical periphery of the bus outlet and the primary shielding ring is connected with a primary shielding down-lead. The primary shielding ring and the primary shielding down-lead are fixed through a vacuum casting by epoxide resin and form an integrated structure together with the iron core, the secondary winding and the secondary junction box. An installation hole is arranged at the end of the primary shielding down-lead. Both bilateral head faces of the cylindrical integrated structure are arranged with concave umbrella skirts. The utility model has small volume, flexible installation, big creepage distance, reliable insulation, small temperature rise and even electric field, and achieves the transparency of anti-electricity-theft.
Description
Technical field
The utility model relates to the electric power system high-pressure measurement mechanism, specifically a kind of column support type busbar current transformer.
Background technology
Support type current transformer is to measure electric current in the electric power system switch cubicle, the equipment of electric energy or relaying protection, increase along with power supply capacity, often need supporting big current ratio instrument transformer, be installed in the big electric current service entrance switch cabinet, and conventional great current mutual inductor inside all has the bus winding one time, external Design has the turnover line terminals, the switch cubicle bus adopts bolt fixed mode after adopting busbar overlap joint instrument transformer terminal, this just requires the contact quality of the relevant contact-making surface in busbar overlap joint back and contact area to want reliable fully, effectively, otherwise the overlap joint quality is unreliable, perhaps because along with service time, environmental factor causes surface contacted resistance excessive, current transformer local pyrexia can occur when actual motion, the insulation damages phenomenon, perhaps influence metering, measure, functions such as protection; In addition because the current transformer winding directly adopts insulating material to be cast in instrument transformer inside, when if the medium-term and long-term overcurrent of running is passed through, the too high phenomenon of temperature rise can appear in instrument transformer, above problems become the hidden danger of equipment safety operation in the electric power system, all the time perplexing electric power system design and maintainer, become in improvement design of electric power system high-current switch and the support type current transformer upgrading the urgent problem that solves.
The utility model content
For solving the unreliable problem that causes the instrument transformer local pyrexia of support type current transformer of the prior art and busbar overlap joint, the purpose of this utility model is to provide a kind of busbar overlap joint reliable, the little column support type busbar current transformer of temperature rise.
For achieving the above object, the technical solution adopted in the utility model is:
Have ring-shaped core, be wound on the integral structure that secondary winding, secondary connection box on the iron core adopt the epoxide resin vacuum cast to form, integral installation is on the flat base that has installing hole, this integral structure is that the middle part is the cylindric of through hole, this through hole level is coaxial in iron core, and this through hole is the bus mouth that is used to place a high voltage bus.
The cylindric periphery of bus mouth has the primary shielding ring, this primary shielding ring is connected with the primary shielding lead-in wire, above-mentioned primary shielding ring and primary shielding lead-in wire is all fixing by the epoxide resin vacuum cast, with unshakable in one's determination, secondary winding and the secondary connection box formula structure that becomes one; Described primary shielding lead terminal has installing hole; Described cylindric integral structure two side ends mask has the full skirt of indent; Have cover plate on the secondary connection box, adopt transparent material to make, have the capping screw that has lead seal hole on it.
The utlity model has following beneficial effect and advantage:
1. volume is little, flexible for installation.The utility model adopts the epoxide resin vacuum cast and is integral cylinder mode, and volume is little in light weight, is not with winding in the device body one time, and bus-bars conductor directly passes instrument transformer and gets final product, but any direction installation is convenient and swift, is fit to any high-current switch use;
2. creepage distance is big, insulation is reliable.The utility model is put annular secondary winding envelope in columnar integrative-structure, and insulation distance is more evenly reliable, and structurally design has the full skirt that strengthens the surface creepage distance, and the surface creepage distance is big;
3. temperature rise is little, electric field is even.The utility model integral structure is inner not to have a winding, has effectively stopped because reasons such as contact is too much, contact quality is unreliable, system's overcurrent and Short-Circuit High Current effect cause instrument transformer local pyrexia or the too high phenomenon of temperature rise; Adopt the measure of a high-tension shielding ring simultaneously, guaranteed that effectively instrument transformer high-low pressure electric field is even, the insulation degradation phenomenon can not occur;
4. anti-electricity-theft transparence.The secondary connection terminal is positioned at the secondary connection box that transparent material is made cover plate for sealing, can conveniently observe directly the actual conditions of secondary connection, and the secondary connection box has the lead sealing of having function, avoids switching secondary line and causes stealing electricity phenomenon.
Description of drawings
Fig. 1 is the utility model external structure front view;
Fig. 2 is the utility model external structure lateral plan;
Fig. 3 is the utility model internal structure schematic diagram.
Embodiment
The utility model adopts following structure:
Shown in Fig. 1～3, the utility model is ring-shaped core 1, be wound in the secondary winding 2 on unshakable in one's determination 1, the integral structure that secondary connection box 3 adopts the epoxide resin vacuums cast to form, integral installation is on the flat base 5 that has installing hole, this integral structure is that the middle part is the cylindric of through hole, this through hole level is located in the middle of the annular of iron core 1, and this through hole is the bus mouth 6 that is used to place a high voltage bus.
The cylindric periphery of described bus mouth 6 has primary shielding ring 10, this primary shielding ring 10 is connected with primary shielding lead-in wire 4, above-mentioned primary shielding ring 10 and primary shielding lead-in wire 4 all adopts the epoxide resin vacuum cast, with unshakable in one's determination 1, secondary winding 2 and the secondary connection box 3 formula structure that becomes one; Described primary shielding 4 ends that go between have installing hole; Described cylindric integral structure two side ends mask has the full skirt 7 of indent; Have cover plate 8 on the secondary connection box 3, adopt transparent material (adopting polymethyl methacrylate in the present embodiment) to make, have the capping screw 9 that has lead seal hole on it.
Manufacturing process of the present utility model is as follows: secondary winding 2 is wound on equably on the iron core 1 of circular ring type, after utilizing secondary winding support 11 to bundle and cushioning wrapping, forms the coil device body with secondary connection terminal 12, secondary winding 2; Secondary winding 2 utilizes secondary winding support 11 to be fixed on the mould, primary shielding ring 10 is adopted mold position and is fixed on the mould, adjusting the distance back forms with the epoxide resin vacuum cast cured explosive, become thereupon and have secondary connection box 3, main body is the drum type brake shape of a horizontal positioned, the cylinder bore manhole is the integral structure of bus mouth 6, be installed on the flat base 5 that has an installing hole with connector, bus mouth 6 when installing and using a bus cross the ferry, periphery has primary shielding ring 10, adopt welding method terminal round-meshed primary shielding 4 firm welding that go between, the connecting line such as current potential such as electric field such as grade of Primary Conductor bus when using; Cylindrical shape integral structure two side ends mask has the full skirt 7 of indent, effectively strengthens the surface creepage distance of product; The secondary connection lid plate of making by transparent material then 8 adopts capping screw 9 that secondary connection terminal 12 envelopes are put, and when the user uses, can conveniently observe directly the actual conditions of secondary connection, and capping screw 10 has lead seal hole and has anti-stealing electricity function.
During use, be fixedly mounted on high-current switch bus-bar room design attitude by base 5, one time high voltage bus directly passes bus mouth 6, utilize the circular mounting hole of primary shielding lead-in wire 4 reliably to be electrically connected with the installing hole of high voltage bus, after finishing the electric and mechanical connection of high voltage electric field, carry out the electric and mechanical connection of secondary cable line again, install the cover plate 8 of secondary connection box 3 then, promptly finish installation.
The utility model is a kind of new product that designs according to national standard fully, adopt the epoxide resin vacuum cast to form, employing rolls iron core, utilize electromagnetic conversion principle and Electric Field Distribution principle, make the secondary current situation of change of reflected measurement primary current exactly, be transferred to secondary measurement and control device, use as electric current, electric energy measurement and relaying protection; Inserted the primary shielding ring that can be connected with high voltage bus in advance, electric field is even when making the utility model operation, and insulation is reliable, is widely used in transformation of electric power system switch cubicle and the new design switch cubicle to go.
Claims (5)
1. column support type busbar current transformer, it is characterized in that: have ring-shaped core (1), be wound on the integral structure that secondary winding (2), secondary connection box (3) on the iron core (1) adopt the epoxide resin vacuum cast to form, integral installation is on the flat base that has installing hole (5), this integral structure is that the middle part is the cylindric of through hole, this through hole level is coaxial in (1) unshakable in one's determination, and this through hole is the bus mouth (6) that is used to place a high voltage bus.
2. by the described column support type busbar current transformer of claim 1, it is characterized in that: the cylindric periphery of bus mouth (6) has primary shielding ring (10), this primary shielding ring (10) is connected with primary shielding lead-in wire (4), above-mentioned primary shielding ring (10) and primary shielding lead-in wire (4) is all fixing by the epoxide resin vacuum cast, with (1) unshakable in one's determination, secondary winding (2) and secondary connection box (3) the formula structure that becomes one.
3. by the described column support type busbar current transformer of claim 2, it is characterized in that: described primary shielding lead-in wire (4) end has installing hole.
4. by the described column support type busbar current transformer of claim 1, it is characterized in that: described cylindric integral structure two side ends mask has the full skirt (7) of indent.
5. by the described column support type busbar current transformer of claim 1, it is characterized in that: have cover plate (8) on the secondary connection box (3), adopt transparent material to make, have the capping screw (9) that has lead seal hole on it.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200119425U CN201036153Y (en) | 2007-04-30 | 2007-04-30 | Backbone type bus current mutual inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200119425U CN201036153Y (en) | 2007-04-30 | 2007-04-30 | Backbone type bus current mutual inductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201036153Y true CN201036153Y (en) | 2008-03-12 |
Family
ID=39197042
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200119425U Expired - Lifetime CN201036153Y (en) | 2007-04-30 | 2007-04-30 | Backbone type bus current mutual inductor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201036153Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101728074B (en) * | 2008-10-23 | 2011-07-20 | 天津市百利纽泰克电气科技有限公司 | Wrapping technical method for primary shield of bus-type current transformer |
| CN102623153A (en) * | 2012-03-29 | 2012-08-01 | 中国电力科学研究院 | Insulating sheath for current transformer |
| CN102867638A (en) * | 2012-08-03 | 2013-01-09 | 武汉市华兴特种变压器制造有限公司 | Armored shielding type high-voltage test transformer |
| CN107731497A (en) * | 2017-09-19 | 2018-02-23 | 中国人民解放军海军工程大学 | Current transformer and its preparation technology |
| CN108711501A (en) * | 2018-05-08 | 2018-10-26 | 河南森源电气股份有限公司 | Current transformer pours into a mould tooling |
| CN109119237A (en) * | 2017-06-26 | 2019-01-01 | 河南平芝高压开关有限公司 | Heating removes tidal current transformer and metal enclosed switchgear |
-
2007
- 2007-04-30 CN CNU2007200119425U patent/CN201036153Y/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101728074B (en) * | 2008-10-23 | 2011-07-20 | 天津市百利纽泰克电气科技有限公司 | Wrapping technical method for primary shield of bus-type current transformer |
| CN102623153A (en) * | 2012-03-29 | 2012-08-01 | 中国电力科学研究院 | Insulating sheath for current transformer |
| CN102623153B (en) * | 2012-03-29 | 2016-02-24 | 中国电力科学研究院 | A kind of current transformer insulating sleeve |
| CN102867638A (en) * | 2012-08-03 | 2013-01-09 | 武汉市华兴特种变压器制造有限公司 | Armored shielding type high-voltage test transformer |
| CN109119237A (en) * | 2017-06-26 | 2019-01-01 | 河南平芝高压开关有限公司 | Heating removes tidal current transformer and metal enclosed switchgear |
| CN109119237B (en) * | 2017-06-26 | 2021-09-07 | 河南平芝高压开关有限公司 | Heating and dehumidifying type current transformer and metal-enclosed switchgear |
| CN107731497A (en) * | 2017-09-19 | 2018-02-23 | 中国人民解放军海军工程大学 | Current transformer and its preparation technology |
| CN108711501A (en) * | 2018-05-08 | 2018-10-26 | 河南森源电气股份有限公司 | Current transformer pours into a mould tooling |
| CN108711501B (en) * | 2018-05-08 | 2024-01-19 | 河南森源电气股份有限公司 | Casting tool for current transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080312 |