CN211319819U - Special cable for 6/10kV and below variable frequency motor - Google Patents
Special cable for 6/10kV and below variable frequency motor Download PDFInfo
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- CN211319819U CN211319819U CN201922391762.XU CN201922391762U CN211319819U CN 211319819 U CN211319819 U CN 211319819U CN 201922391762 U CN201922391762 U CN 201922391762U CN 211319819 U CN211319819 U CN 211319819U
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Abstract
The utility model discloses an 6/10kV reaches following inverter motor private cable relates to the inverter cable field, for reaching above-mentioned purpose, the technical scheme of the utility model from inside to outside include cable core, inner liner, the total shielding layer of copper strips, separation sleeve, armor and PVC oversheath in proper order, the cable core is including the insulated core of three symmetrical structure, insulated core is from inside to outside including conductor, conductor shield, XLPE insulating layer, insulated shield, copper strips branch shielding layer and split-phase sheath, has better electromagnetic compatibility, plays certain effect to restraining electromagnetic interference, can offset the odd-order frequency in the higher harmonic, improves inverter motor private cable's interference immunity, has reduced the electromagnetic radiation among the entire system.
Description
Technical Field
The utility model relates to an 6/10kV and following inverter motor private cable mainly relates to the inverter cable field.
Background
The technology of variable frequency speed regulation is more and more widely going into various industries. The energy-saving and labor-saving automatic control system has the remarkable advantages of energy conservation, labor saving and easiness in forming an automatic control system, and can be used as central equipment for electric traction. The energy-saving effect of the frequency conversion device is very obvious. According to the report of the Chinese automation network, the frequency conversion speed regulation motor is generally adopted in a certain thermal power plant in Zhejiang, so that the whole generator set can save electricity by 30 percent. After the variable frequency speed regulation is used, the soft start of the motor is realized, the motor works stably, the abrasion of a bearing of the motor is reduced, and the service life and the maintenance period of the motor are prolonged. Therefore, the variable frequency speed control technology is widely used in the industries of petroleum, metallurgy, power generation, railways, mines and the like. However, the power supply cable for connecting the variable frequency motor and the variable frequency power supply corresponding to the variable frequency motor is just started at present, and a common power cable is generally adopted in actual installation. A series of problems such as large interference can be gradually exposed in a large number of uses.
SUMMERY OF THE UTILITY MODEL
The not enough of prior art more than, the utility model provides an 6/10kV and following inverter motor private cable has better electromagnetic compatibility, plays certain effect to restraining electromagnetic interference, can offset the odd frequency in the higher harmonic, improves inverter motor private cable's interference immunity, has reduced the electromagnetic radiation among the entire system.
In order to achieve the above purpose, the technical scheme of the utility model is that: the cable comprises a cable core, an inner liner, a copper strip total shielding layer, an isolation sleeve, armor and a PVC outer sheath in sequence from inside to outside, wherein the cable core comprises three insulation wire cores of symmetrical structures, and each insulation wire core comprises a conductor, a conductor shielding layer, an XLPE (cross linked polyethylene) insulating layer, an insulation shielding layer, a copper strip branch shielding layer and a phase-splitting sheath from inside to outside.
The technical principle and the beneficial effects of the utility model are as follows:
the scheme adopts a symmetrical cable structure, has better electromagnetic compatibility, plays a certain role in inhibiting electromagnetic interference, can offset odd-order frequency in higher harmonic waves, improves the anti-interference performance of the special cable for the variable frequency motor, and reduces the electromagnetic radiation in the whole system. By adopting the copper strip total shielding layer and the conductor shielding layer, the cable can resist electromagnetic induction, poor grounding and power line conduction interference, reduce inductance and prevent induced electromotive force from being overlarge. The shielding layer not only plays a role in inhibiting electromagnetic waves from being emitted to the outside, but also can be used as a channel of short-circuit current and can play a role in protecting the neutral wire core.
Preferably, the copper strip total shielding layer is a copper strip combined shielding layer, a copper strip woven shielding layer, a copper strip shielding layer or a copper strip woven copper strip shielding layer, and can well play a role in shielding and avoid electromagnetic interference.
Preferably, the armor comprises a galvanized steel strip armor, and the galvanized steel strip can be used in combination with a copper strip total shielding layer and a conductor shielding layer for shielding, so that mutual shielding is compensated, the shielding effect is better, and corrosion resistance is realized.
Preferably, the armor comprises a copper strip armor and an aluminum foil layer, and the effect of shielding electromagnetic interference can be better and fully achieved through a richer metal combined shielding structure. The copper strip armor has the shielding performance of a copper strip and also contains mechanical stress of a plastic strip, so that a shielding layer is more stable and reliable.
Preferably, a filling medium is arranged between the cable cores in the inner liner layer, so that the compactness in the cable is kept conveniently.
Preferably, the filling medium is a polypropylene tape filling rope, and is softer and more corrosion-resistant.
Preferably, be equipped with fire-retardant rubber coating type glass strap outside the insulating shield layer, make fire behaviour more reliable, simultaneously fire-retardant rubber coating type glass strap is equipped with the graphite coating outward, and the graphite coating all has the heat dispersion that the improvement cable that excellent thermal conductivity can be obvious.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only one of the drawings of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
The cable comprises a conductor 1, a conductor shielding layer 2, an XLPE insulating layer 3, an insulating shielding layer 4, a copper strip sub-shielding layer 5, a split-phase sheath 6, a filling medium 7, an inner lining layer 8, a copper strip total shielding layer 9, an isolation sleeve 10, armor 11 and a PVC outer sheath 12.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are merely preferred embodiments of the present invention, rather than all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Examples
As shown in figure 1, the embodiment of the utility model provides a cable core, inner liner 8, the total shielding layer of copper strips 9, spacer sleeve 10, armor 11 and PVC oversheath 12 are included from inside to outside in proper order to include. And a filling medium 7 is arranged between the cable cores in the inner liner 8, so that the compactness in the cable is kept conveniently.
The cable core comprises three insulation wire cores with symmetrical structures, and each insulation wire core comprises a conductor 1, a conductor 1 shielding layer, an XLPE insulation layer 3, an insulation shielding layer 4, a copper strip shielding layer 5 and a split-phase sheath 6 from inside to outside.
The scheme adopts a symmetrical cable structure, has better electromagnetic compatibility, plays a certain role in inhibiting electromagnetic interference, can offset odd-order frequency in higher harmonic waves, improves the anti-interference performance of the special cable for the variable frequency motor, and reduces the electromagnetic radiation in the whole system.
The copper strip total shielding layer 9 is a copper strip combined shielding, a copper strip woven shielding, a copper strip shielding or a copper strip woven copper strip shielding, and can well play a role in shielding and avoid electromagnetic interference. The armor 11 comprises a galvanized steel strip armor 11, and through the galvanized steel strip, the armor can be used in combination with the copper strip total shielding layer 9 and the conductor 1 shielding layer for shielding, so that mutual shielding is compensated, the shielding effect is better, and corrosion can be prevented on the other hand. The armor 11 includes copper strips armor 11 and aluminium foil layer, through richer metal combination shielding structure, can be better abundant play shielding electromagnetic interference's effect. The copper strip armor 11 not only has the shielding performance of a copper strip, but also contains mechanical stress of a plastic strip, so that a shielding layer is more stable and reliable.
By adopting the copper strip total shielding layer 9 and the conductor 1 shielding layer, the cable can resist electromagnetic induction, poor grounding and power line conduction interference, reduce inductance and prevent induced electromotive force from being overlarge. The shielding layer not only plays a role in inhibiting electromagnetic waves from being emitted to the outside, but also can be used as a channel of short-circuit current and can play a role in protecting the neutral wire core.
The filling medium 7 is a polypropylene belt filling rope, and is softer and more corrosion-resistant.
The flame-retardant gluing type glass cloth belt is arranged outside the insulation shielding layer 4, so that the flame retardant performance is more reliable, meanwhile, the graphite coating is arranged outside the flame-retardant gluing type glass cloth belt, and the graphite coating has excellent heat conductivity and can obviously improve the heat dissipation performance of the cable.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1.6/10kV and following inverter motor private cable includes cable core, inner liner (8), the total shielding layer of copper strips (9), separation sleeve (10), armor (11) and PVC oversheath (12) from inside to outside in proper order, its characterized in that, the cable core is including the insulation core of three symmetrical structure, insulation core is from inside to outside including conductor (1), conductor (1) shielding layer, XLPE insulating layer (3), insulation shielding layer (4), copper strips branch shielding layer (5) and phase splitting sheath (6).
2. The cable special for 6/10kV and following variable frequency motors according to claim 1, characterized in that: the copper strip total shielding layer (9) is a copper strip combined shielding, a copper strip braided shielding, a copper strip shielding or a copper strip braided copper strip shielding.
3. The cable special for 6/10kV and following variable frequency motors according to claim 1, characterized in that: the armor (11) comprises a galvanized steel strip armor (11).
4. The 6/10kV and following variable frequency motor special cable of claim 3, characterized in that: the armor (11) comprises a copper strip armor (11) and an aluminum foil layer.
5. The cable special for 6/10kV and following variable frequency motors according to claim 1, characterized in that: and filling media (7) are arranged between the cable cores in the inner liner (8).
6. The 6/10kV and following variable frequency motor special cable of claim 5, characterized in that: the filling medium (7) is a polypropylene belt filling rope.
7. The cable special for 6/10kV and following variable frequency motors according to claim 1, characterized in that: and a flame-retardant glue coating type glass cloth belt is arranged outside the insulation shielding layer (4), and a graphite coating is arranged outside the flame-retardant glue coating type glass cloth belt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922391762.XU CN211319819U (en) | 2019-12-26 | 2019-12-26 | Special cable for 6/10kV and below variable frequency motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922391762.XU CN211319819U (en) | 2019-12-26 | 2019-12-26 | Special cable for 6/10kV and below variable frequency motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211319819U true CN211319819U (en) | 2020-08-21 |
Family
ID=72054219
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922391762.XU Active CN211319819U (en) | 2019-12-26 | 2019-12-26 | Special cable for 6/10kV and below variable frequency motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211319819U (en) |
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2019
- 2019-12-26 CN CN201922391762.XU patent/CN211319819U/en active Active
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