CN2502373Y - Cable for cable winding - Google Patents
Cable for cable winding Download PDFInfo
- Publication number
- CN2502373Y CN2502373Y CN 01265135 CN01265135U CN2502373Y CN 2502373 Y CN2502373 Y CN 2502373Y CN 01265135 CN01265135 CN 01265135 CN 01265135 U CN01265135 U CN 01265135U CN 2502373 Y CN2502373 Y CN 2502373Y
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- China
- Prior art keywords
- cable
- insulation
- winding
- utility
- thickness
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- Expired - Fee Related
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Abstract
The utility model is a cable suitable for cable winding, which belongs to the cable design and application field. The utility model comprises a metal conductor 1, an inner electric conductance shielding layer 2 is pressed to cover on the surface of an electric conductance core 2, an insulation layer 3 is pressed to cover on the inner electric conductance shielding layer, and an outer electric conductance shielding layer 4 is pressed to cover on the insulation layer. The utility model is characterized in that: the cable insulation layer is provided with two or more than two insulation thickness, and transits the insulation of two different thicknesses, the cable is taper, the transition section is the taper transition section 5 of the cable. The utility model is applied in cable winding, comparing with the traditional cable, which optimizes the insulation thickness, which can reduce the winding volume suitably, at the same time saves the cable insulation material and reduces the cost suitably.
Description
The present invention relates to the design and the application of cable.
Winding cable is a kind of novel cable newly developed, this cable generally comprises conductor wire core, inner semiconductor layer, insulating barrier and out semiconductor layer, and wherein the cable winding of inner semiconductor layer and the not all type of out semiconductor layer must have.
Cable insulation core commonly used generally has only a class of insulation, the cable that adopts in the production application at present, and under selected situation such as the insulating material of cable, environment, cable insulation thickness is equal in design.
Some special electrical characteristics of cable are applied to new field just gradually at present.For shielded cable, as XLPE type cable or EPR type cable, transmitting high voltage and shielding under the good condition, the round conductor surface field of cable is evenly distributed, and they all have good electric property and mechanical performance.Because these characteristics, these cables just are being used for the coiling winding.ABB AB once just based on by the transformer application of cable winding winding relevant patent, denomination of invention is " transformer/reactor ", number of patent application is 97196545, wherein describe in detail and adopt cable to substitute traditional widely used electromagnetic wire, as the manufacture method of the cable winding of the advantage of Transformer Winding conductor and transformer.
The winding cable insulation thickness is got its higher value by tolerance power frequency ac voltage and the needed thickness decision of tolerance lightning impulse voltage according to the thickness that these two kinds of voltages are calculated.
Insulation thickness for the power frequency ac voltage decision is calculated by following formula:
tAC＝U0?k1.k2.k3/EAC
U0 is a rated voltage for cable
K1 is a temperature coefficient
K2 is an aging coefficient
K3 is the nargin coefficient
EAC is for exchanging tolerance electric field strength, kV/mm
Insulation thickness for the decision of lightning impulse voltage value is calculated by following formula:
timp＝UBIL?k1.k2.k3/Eimp
UBIL is the lightning impulse voltage value
K1 is a temperature coefficient
K2 is an aging coefficient
K3 is the nargin coefficient
Eimp is a thunder and lightning tolerance electric field strength, kV/mm
When the value of k1, k2 under k1, k2, k3, EAC and the lightning impulse voltage that given industrial-frequency alternating current is depressed, k3, Eimp, adopt identical cable insulation medium, then the voltage that thickness and cable bore of cable insulation is approximated to proportional relation.Thickness of insulating layer increases, and the withstand voltage of cable also increases, and thickness of insulating layer reduces, and the withstand voltage of cable also reduces.
For the three-phase power transformer of domestic routine, adopt the graded insulation structure more.The high pressure winding adopts star connection, Y connection more, and the general direct or indirect ground connection of neutral point is example with 110kV level transformer, and the insulation level of its neutral point generally designs by 40kV or 60kV.By the winding of multi-layer cable coiling, when head end applied voltage, the winding head end was to distributions that taper off of terminal current potential, the field intensity height that winding head end cable is born, and the field intensity that winding end cable is born is low.If adopt the common cable coiling, insulation thicknesses such as the terminal cable of winding head end cable and winding is, the terminal cable of winding exists insulation blocked up, though improved reliability, but also cause the big and winding volume increase of insulating material consumption, this all is unfavorable for transportation and assembling.
The described cable of the utility model is that same cable has two or more different insulative thickness in the axial direction under a kind of situation that does not change cable conduction core specification.As shown in Figure 1, at the changeover portion of two kinds of classes of insulation, its cable profile is taper.On same cable, one or more tapering transition section is arranged.
Fig. 1, comprise the axial section of the cable of a tapering transition section
1 pair of the utility model describes in detail with reference to the accompanying drawings below.
The utility model comprises: metallic conductor 1., the inner semiconductor layer that is extruded in the conductor wire core surface 2., be extruded on the inner semiconductor layer insulating barrier 3., the out semiconductor layer that is extruded in insulating barrier 4..It is characterized in that: cable insulation has two or more insulation thickness, seamlessly transits between the insulation of two kinds of different-thickness, and cable is taper, this changeover portion be cable the tapering transition section 5..
The utility model is applied to cable winding, compares with traditional cable, has optimized insulation thickness, can suitably reduce winding volume, saves cable insulation material simultaneously and also suitably reduces cost.
Under the situation that cable insulation material is selected, the cable electric strength depends primarily on thickness of insulating layer.The insulation of normal cable by cable plastic extruding machine extrusion molding on cable core.According to known technology, under the situation of selected extrusion head mould,, just can regulate insulation thickness easily by screw speed on the even regulation extrusion head and core hauling speed.Before the utility model, this regulatory function only is used for correcting the deviation of insulation thickness in the production, guarantees that whole cable reaches predefined insulating requirements.
The adjusting of speed adjustment screw speed and core hauling speed is preferably stepless, and for guaranteeing the insulation quality of cable, the difference of maximum insulation thickness and minimum insulation thickness is subjected to " three-layer co-extruded " process technology limit on same cable.Produce with regard to the three-layer co-extruded cross-linking Polyethylene insulated cable, this difference should be limited in the 5mm.
Claims (2)
1, the utility model comprise a metallic conductor 1., the inner semiconductor layer that is extruded in the conductor wire core surface 2., be extruded on the inner semiconductor layer insulating barrier 3., the out semiconductor layer that is extruded in insulating barrier 4.,
It is characterized in that: on the cable axial direction, 3. insulating barrier has two or more insulation thickness, transition between the insulation of two kinds of different-thickness, cable is taper, this changeover portion be cable the tapering transition section 5., on same cable, one or more tapering transition section is arranged.
2, cable according to claim 1 is characterized in that cable insulation is 3. for XLPE type or EPR type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01265135 CN2502373Y (en) | 2001-09-30 | 2001-09-30 | Cable for cable winding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01265135 CN2502373Y (en) | 2001-09-30 | 2001-09-30 | Cable for cable winding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2502373Y true CN2502373Y (en) | 2002-07-24 |
Family
ID=33672156
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01265135 Expired - Fee Related CN2502373Y (en) | 2001-09-30 | 2001-09-30 | Cable for cable winding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2502373Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102290155A (en) * | 2011-08-03 | 2011-12-21 | 西安交通大学 | Design method for insulation thickness of high-voltage cross-linked polyethylene direct current (DC) cable |
| CN102982932A (en) * | 2012-12-20 | 2013-03-20 | 武汉芯宝科技有限公司 | Voltage induction variable resistance film envelope capable of absorbing instant electric pulse energy as well as manufacturing method and application of film |
| CN111785427A (en) * | 2020-07-22 | 2020-10-16 | 河北华通线缆集团股份有限公司 | Ridge type shielding layer for cable and application thereof |
-
2001
- 2001-09-30 CN CN 01265135 patent/CN2502373Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102290155A (en) * | 2011-08-03 | 2011-12-21 | 西安交通大学 | Design method for insulation thickness of high-voltage cross-linked polyethylene direct current (DC) cable |
| CN102982932A (en) * | 2012-12-20 | 2013-03-20 | 武汉芯宝科技有限公司 | Voltage induction variable resistance film envelope capable of absorbing instant electric pulse energy as well as manufacturing method and application of film |
| CN111785427A (en) * | 2020-07-22 | 2020-10-16 | 河北华通线缆集团股份有限公司 | Ridge type shielding layer for cable and application thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: TEBIAN ELECTRIC APPARATUS STOCK CO., LTD. Free format text: FORMER NAME OR ADDRESS: XINJIANG TBEA ELECTRICAL CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Patentee after: Tebian Electrician Co., Ltd. Patentee before: Tebian Electrotechnical Co., Ltd., Xinjiang |
|
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |