CN202076041U - Concentric conductor fire-resistant power cable - Google Patents
Concentric conductor fire-resistant power cable Download PDFInfo
- Publication number
- CN202076041U CN202076041U CN2011201199508U CN201120119950U CN202076041U CN 202076041 U CN202076041 U CN 202076041U CN 2011201199508 U CN2011201199508 U CN 2011201199508U CN 201120119950 U CN201120119950 U CN 201120119950U CN 202076041 U CN202076041 U CN 202076041U
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- cable
- power cable
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- concentric conductor
- concentric
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Abstract
The utility model discloses a concentric conductor fire-resistant power cable, which comprises three inner conductors and is characterized in that cross sections of the three inner conductors are all fan-shaped, insulating layers are respectively wrapped on the outer sides of the tree inner conductors, then the three inner conductors are mutually stranded and form a bundle, and an inner belting layer, a lining layer and an outer belting layer are sequentially wrapped on the bundled inner conductors. A plurality of outer conductors are arranged between the lining layer and the outer belting layer, and the outer conductors are concentric with the three inner conductors. A protective sleeve layer and a shield layer are sequentially wrapped on the outer side of the outer belting layer, and the bending radius of the cable is not smaller than 15 times of the external diameter of the cable. The concentric conductor fire-resistant power cable has low and even positive (negative) sequence and zero sequence working impedance, thereby facilitating improvement of power supply quality. The (concentric conductor) outer conductors have low reactance value, thereby facilitating sensitive movement of short circuit automatic protection device and guaranteeing safe operation of relative equipment of the cable. Simultaneously, the concentric conductor fire-resistant power cable has the performances including high electromagnetic interference resistance, lightning stroke resistance and the like.
Description
Technical field:
The utility model relates to the power cable field, relates in particular to a kind of concentric conductor fireproof power cable.
Background technology:
Cable is in order to transmit electricity (magnetic) energy, the wire product of information and the conversion of realization electromagnetic energy.Normally by the cable of several or at least two every group stranded similar ropes that form of several groups of leads, mutually insulated between every group of lead, and often be twisted into round a center, whole outside is surrounded by the cover layer of high-insulation.
Electric wire mainly comprises bare wire, electromagnetic wire and electrical equipment and electrical insulated electric conductor, power cable, telecommunication cable and optical cable.
The common a lot of operating characteristics of three cores, quad are relatively poor, not equal to higher and uneven just (contrary) preface and zero sequence working impedance, the action of short circuit automatic safety device is insensitive or the like.For not satisfying work requirements under the actual working environment; For the fireproof power cable of concentric conductor, cable has lower and uniformly just (contrary) preface and zero sequence working impedance, helps improving power supply quality; Concentric layer conductor (circle of one between inner covering and outer belting layer outer conductor) is more much lower than the reactance value of common cable under the zero sequence operating state, helps the sensitivity action of short circuit automatic safety device, thereby guarantees the safe operation of cable relevant device; Have performances such as stronger anti-electromagnetic interference and anti-thunderbolt.
The utility model is applicable to that making electric power transfer in rated voltage 0.6/1kv and the following power circuit uses.
The utility model content:
The purpose of this utility model provides a kind of concentric conductor fireproof power cable, and the action that has solved the short-and-medium circuit automatic protection device of the course of work effectively is insensitive, the defective of higher and uneven just (contrary) preface and zero sequence working impedance.
The technical solution of the utility model is as follows:
The concentric conductor fireproof power cable, comprise three inner wires, it is characterized in that: described three inner wire cross sections all are fan-shaped, described three inner wires outside is enclosed with insulating barrier respectively, three mutual stranded bunchys of inner wire behind the wrap insulate layer, be enclosed with interior belting layer, inner covering, outer belting layer behind the bunchy successively, be provided with several and three outer conductors that inner wire is concentric between described inner covering and the outer belting layer, the described outer belting layer outside is enclosed with restrictive coating, armour successively, and the bending radius of cable is not less than 15 times of the outside diameter of cable.
Described concentric conductor fireproof power cable is characterized in that: described three inner wires, outer conductor adopt the copper core.
Described concentric conductor fireproof power cable is characterized in that: it is crosslinked polyethylene that described insulating barrier, restrictive coating adopt material.
Described concentric conductor fireproof power cable is characterized in that: described armour adopts the thicker wire braiding to constitute.
The operating characteristic of cable:
The maximum operating temperature that cable conductor allows: crosslinked polyetylene insulated 90 ℃;
During cable short circuit (the longest ability duration is no more than 5s), the maximum temperature of conductor: 250 ℃ of cross-linked polyethylene insulated cables;
The ambient temperature of laying should be not less than 0 ℃, and being lower than 0 ℃ should heat in advance;
Finished cable should stand 3500V power-frequency voltage test 5min and not puncture;
Conductor DC resistance meets the GB/T3956 regulation in the time of 20 ℃;
The combustion characteristics of cable:
Fire-resisting cable should be able to stand GB/ T19666(IEC331) the fire-resistance property test of regulation.
The utility model has the advantages that:
The utlity model has lower and uniformly just (contrary) preface and zero sequence working impedance, help improving power supply quality; The reactance value of (concentric conductor) outer conductor under the zero sequence operating state is lower, helps the sensitivity action of short circuit automatic safety device, thereby guarantees the safe operation of cable relevant device; Simultaneously, have performances such as stronger anti-electromagnetic interference and anti-thunderbolt.
Description of drawings:
Fig. 1 is a structural representation of the present utility model.
Embodiment:
The concentric conductor fireproof power cable, comprise three inner wires 1, three inner wire 1 cross sections all are fan-shaped, three inner wire 1 outsides are enclosed with insulating barrier 2 respectively, wrap insulate layer 2 back three inner wires, 1 mutual stranded bunchy, belting layer 3 in being enclosed with successively behind the bunchy, inner covering 4, outer belting layer 5, be provided with the concentric outer conductor 6 of several and three inner wires 1 between inner covering 4 and the outer belting layer 5, outer belting layer 5 outsides are enclosed with restrictive coating 7 successively, armour 8, the bending radius of cable is not less than 15 times of the outside diameter of cable, three inner wires 1, outer conductor 6 adopts the copper core, insulating barrier 2, it is crosslinked polyethylene that restrictive coating 7 adopts material, and armour 8 adopts the thicker wire braiding to constitute.
Claims (4)
1. concentric conductor fireproof power cable, comprise three inner wires, it is characterized in that: described three inner wire cross sections all are fan-shaped, described three inner wires outside is enclosed with insulating barrier respectively, three mutual stranded bunchys of inner wire behind the wrap insulate layer, be enclosed with interior belting layer, inner covering, outer belting layer behind the bunchy successively, be provided with several and three outer conductors that inner wire is concentric between described inner covering and the outer belting layer, the described outer belting layer outside is enclosed with restrictive coating, armour successively, and the bending radius of cable is not less than 15 times of the outside diameter of cable.
2. concentric conductor fireproof power cable according to claim 1 is characterized in that: described three inner wires, outer conductor adopt the copper core.
3. concentric conductor fireproof power cable according to claim 1 is characterized in that: it is crosslinked polyethylene that described insulating barrier, restrictive coating adopt material.
4. concentric conductor fireproof power cable according to claim 1 is characterized in that: described armour adopts the thicker wire braiding to constitute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201199508U CN202076041U (en) | 2011-04-22 | 2011-04-22 | Concentric conductor fire-resistant power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201199508U CN202076041U (en) | 2011-04-22 | 2011-04-22 | Concentric conductor fire-resistant power cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202076041U true CN202076041U (en) | 2011-12-14 |
Family
ID=45114133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201199508U Expired - Fee Related CN202076041U (en) | 2011-04-22 | 2011-04-22 | Concentric conductor fire-resistant power cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202076041U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103871569A (en) * | 2014-02-28 | 2014-06-18 | 无为县金华电缆材料有限公司 | Self temperature control heat tracing current lead cable |
| CN103928111A (en) * | 2013-09-05 | 2014-07-16 | 安徽华源电缆集团有限公司 | Low-smoke zero-halogen flame-retardant light-weight control cable |
-
2011
- 2011-04-22 CN CN2011201199508U patent/CN202076041U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103928111A (en) * | 2013-09-05 | 2014-07-16 | 安徽华源电缆集团有限公司 | Low-smoke zero-halogen flame-retardant light-weight control cable |
| CN103871569A (en) * | 2014-02-28 | 2014-06-18 | 无为县金华电缆材料有限公司 | Self temperature control heat tracing current lead 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: 20111214 Termination date: 20150422 |
|
| EXPY | Termination of patent right or utility model |