CN201788756U - Power cable for frequency conversion system - Google Patents
Power cable for frequency conversion system Download PDFInfo
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- CN201788756U CN201788756U CN2010205168383U CN201020516838U CN201788756U CN 201788756 U CN201788756 U CN 201788756U CN 2010205168383 U CN2010205168383 U CN 2010205168383U CN 201020516838 U CN201020516838 U CN 201020516838U CN 201788756 U CN201788756 U CN 201788756U
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Abstract
The utility model discloses a power cable for a frequency conversion system. The power cable comprises a plurality of conductors and conductor cores, wherein the conductor cores are arranged in the conductors; insulating layers are wrapped outside the conductors; shielding layers I are wrapped outside the insulating layers; shielding layers II are wrapped outside the shielding layers I; sheathing layers are wrapped outside the shielding layers II; the conductor cores adopt power cores; the conductors adopt stranded soft copper wires; the insulating layers are made of crosslinked polyethylene; the shielding layers I are wrapped by copper strips; the shielding layers II are woven by tinned copper wires; and the sheathing layers are made of crosslinked polyolefine. The power cable provided by the utility model has the characteristics of lowered mutual capacitance, improved insulating resistance and voltage resistance, good flame retardant property, excellent electromagnetic shielding property, favorable anti-interference performance and small influence of ultraharmonics, and is economical, energy-saving and efficient, meanwhile, less smoke is generated by combustion, the generated smoke has low toxicity and corrosiveness, and the frequency conversion equipment has low noise and long service life.
Description
Technical field:
The utility model relates to the power cable field, relates in particular to a kind of frequency conversion system power cable.
Background technology:
The insulating material that has more and more adopted frequency-changing cables peculiar to vessel such as converter plant to adopt at present on boats and ships and the platform mainly is hard ethylene-propylene rubber and crosslinked polyethylene at present, the electric property of the two is very superior, there is equipment energy-conservation, reduces equipment attrition, prolong equipment life to pursue.The use of frequency conversion equipment is increasing to the demand of supporting with it private cable (calling frequency-changing cable in the following text), and specification requirement is also more and more higher.Therefore producer need further investigate and understand the structure and the performance of this type of cable, so that can make and select high-quality.The utility model has solved frequency-changing cable when burning, and halide gas produces strong acid mist through the combustion reaction meeting, and people, thing, environment have been caused " secondary pollution ".
Frequency-changing cable makes us will take all factors into consideration when it is carried out structural design because of its special environment for use and performance requirement, optimizes and forms.With regard to structural design, mainly set about research from the influence and frequency-changing cable two aspects that influence to external world of outer bound pair frequency-changing cable, also to consider simultaneously frequency-changing cable dielectric voltage withstand, lay space, bending radius or the like.In general, frequency-changing cable mainly contains 3 cores, 3+1 core and three kinds of structures of 3+3 core, and wherein performance is best, the most stable, and what type selecting was first-elected is the 3+3 core pattern.
The utility model content:
The purpose of this utility model provides a kind of frequency conversion system power cable, has avoided it when burning, and halide gas produces strong acid mist through the combustion reaction meeting, and people, thing, environment have been caused " secondary pollution ".
The technical solution of the utility model is as follows:
A kind of frequency conversion system power cable, comprise many conductors, core, be provided with core in the described conductor, it is characterized in that: described every conductor is wrapped with the banding insulation layer, insulating barrier is wrapped with screen one, screen one is wrapped with screen two, and screen two is wrapped with restrictive coating.
Described frequency conversion system power cable, it is characterized in that: described core is the power core, conductor closes for the soft copper skein silk, described insulating layer material adopts crosslinked polyethylene, described screen one adopts copper strips wrapped, screen two adopts the tinned copper wire braiding, and described restrictive coating material adopts cross-linked polyolefin.
The material that the utility model adopted is as follows:
(1) conductor: because the place that frequency-changing cable mainly lays mostly is in the cabin, make frequency-changing cable to lay the space less, external diameter, weight, bending radius that this just requires cable on the basis of guaranteed performance etc. is as far as possible little, the general employing of the conductor of frequency-changing cable peculiar to vessel meets the 5 class soft copper skein silks that IEC60228 requires and closes conductor for this reason, make cable more softness easily lay.Phenomenons such as conductive surface light, non-oxidation, burr.
(2) insulation: crosslinked polyetylene insulated layer generally can bear 2～3 times of system peak voltage that the high order harmonic component stack causes.Crosslinked polyethylene has heat resistance simultaneously, and the rated temperature of conductor is up to 90 ℃ in the time of can making the cable operate as normal, and the maximum temperature of cable can reach 250 ℃ during short circuit, makes with its ampacity of cable in cross section bigger.
(3) shielding material: shielding material selects as requested that copper strips is wrapped for use, the tinned copper wire braiding.
Shielding layer grounding well is to suppress the necessary condition that frequency-changing cable generates electromagnetic waves and externally launches.For the frequency-changing cable peculiar to vessel of design, the earthing mode of tincopper fuse wire braided armor shielding is easy to solve.But wrapped shielding will consider to adopt drainage thread mode ground connection for the Copper Foil band.Description according to IEC60092.350 " peculiar to vessel and offshore unit electric power, control and general structure of instrument cable and test method ", adopt the drainage thread that must adopt tinned copper wire or the stranded composition of bare copper wire when the Copper Foil band is wrapped to be shielded, and drainage thread will contact drainage thread ground connection when laying with the copper surface of Copper Foil band.Certainly, this standard is stipulated simultaneously, as adopt when the Copper Foil band is wrapped to weave the double structure composite shielding with tinned copper wire, the Copper Foil band can (but rule of thumb our cable of design have still adopted drainage thread without drainage thread, when the user lays with its ground connection, thereby farthest guarantee shield effectiveness, reach Electro Magnetic Compatibility).
(4) cable element: for reduce the mutual interference mutually of frequency-changing cable when operation and surrounding environment as far as possible, strengthen the anti-high order harmonic component of cable, strengthen shielding action, satisfy electromagnetic compatibility, make the entire equipment unit can steady operation, the frequency-changing cables that adopt 3+3 core symmetrical structures on the structural design of cable more.
Take 3 little cores are placed on respectively the embedding crack of 3 big cores, wherein, the adjustment of laying tension is very crucial, by improving actinobacillus device, guarantees core laying tension unanimity, and the cable core of emitting like this is tight, rounding.Packing material should be consistent with the working temperature of cable, and should be compatible with contactant.Outer wrapped one or more layers band of cable core is tightened, and prevents that cable core is loose in the laid processes.Have the cable of fire-retardant requirement should adopt fire proofing to fill, and fire-retardant band is wrapped tightens.
(5) sheath: sheath adopts the cross-linked polyolefin material, has so both reduced environmental pollution, improves the fire-resistance property of cable again.
Advantage of the present utility model:
1) the utility model adopts crosslinked polyethylene for insulation, has reduced mutual capacitance, has improved insulation resistance, has improved voltage-resistent characteristic.
2) Halogen, low cigarette, low-poison and combustion-resisting power cable also should have following characteristics: have good flame retardant property except the general characteristic and electric property that keep common cable; Escaping gas toxicity is lower during the cable material burning; Halogen gas, gas aqueous ph value and the conductance of overflowing are low, have the low-corrosiveness energy; It is few to generate smog during cable fire.
3) copper strips+copper wire braiding structure has guaranteed the capability of electromagnetic shielding that cable is good, has weakened the interference of equipment and system to external world of frequency-changing cable electromagnetic wave.
4) the 3+3 structure has effectively suppressed the odd harmonic in the high order harmonic component, has played the cable interference free performance, has satisfied electromagnetic compatibility in the equipment group running.
5) three earthing conductors divide the influence that structure can effectively reduce high order harmonic component equally, weaken the variable-frequency motor noise, guarantee equipment stable operation, prolong service life of equipment, realize energy-conservationly to a greater extent, raise the efficiency.
Description of drawings:
Fig. 1 is a structural representation of the present utility model.
Embodiment:
A kind of frequency conversion system power cable comprises many conductors 1, core 2, is provided with core 2 in the conductor 1, every conductor 1 is wrapped with insulating barrier 3, insulating barrier 3 is wrapped with screen 1, and screen 1 is wrapped with screen 25, and screen 25 is wrapped with restrictive coating 6, core 3 is the power core, conductor 2 closes for the soft copper skein silk, and screen 1 adopts copper strips wrapped, and insulating layer material adopts crosslinked polyethylene, screen 25 adopts the tinned copper wire braiding, and restrictive coating 6 materials adopt cross-linked polyolefin.
Claims (2)
1. a frequency conversion system power cable comprises many conductors, core, is provided with core in the described conductor, it is characterized in that: described every conductor is wrapped with insulating barrier, insulating barrier is wrapped with screen one, and screen one is wrapped with screen two, and screen two is wrapped with restrictive coating.
2. frequency conversion system power cable according to claim 1, it is characterized in that: described core is the power core, conductor closes for the soft copper skein silk, described insulating layer material adopts crosslinked polyethylene, described screen one adopts copper strips wrapped, screen two adopts the tinned copper wire braiding, and described restrictive coating material adopts cross-linked polyolefin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205168383U CN201788756U (en) | 2010-09-01 | 2010-09-01 | Power cable for frequency conversion system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205168383U CN201788756U (en) | 2010-09-01 | 2010-09-01 | Power cable for frequency conversion system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201788756U true CN201788756U (en) | 2011-04-06 |
Family
ID=43820713
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205168383U Expired - Fee Related CN201788756U (en) | 2010-09-01 | 2010-09-01 | Power cable for frequency conversion system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201788756U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102708973A (en) * | 2012-06-23 | 2012-10-03 | 南通米兰特电气有限公司 | Connection cable for double-layer shielding motor |
| CN102881378A (en) * | 2012-10-12 | 2013-01-16 | 无锡市明珠电缆有限公司 | Low-electromagnetic-interference frequency conversion cable |
| CN105733036A (en) * | 2016-03-28 | 2016-07-06 | 王社兵 | High-strength aging-resistant mine cable |
-
2010
- 2010-09-01 CN CN2010205168383U patent/CN201788756U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102708973A (en) * | 2012-06-23 | 2012-10-03 | 南通米兰特电气有限公司 | Connection cable for double-layer shielding motor |
| CN102881378A (en) * | 2012-10-12 | 2013-01-16 | 无锡市明珠电缆有限公司 | Low-electromagnetic-interference frequency conversion cable |
| CN105733036A (en) * | 2016-03-28 | 2016-07-06 | 王社兵 | High-strength aging-resistant mine cable |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110406 Termination date: 20150901 |
|
| EXPY | Termination of patent right or utility model |