Medium-voltage fireproof cable for green building
A fire-resistant cable and green building technology, applied in the direction of insulated cables, cables, circuits, etc., can solve the problems of fire prevention and other problems, achieve the effects of reducing transmission, good heat insulation effect, and lower temperature
Active Publication Date: 2017-08-18
FAR EAST CABLE +2
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Problems solved by technology
[0002] Usually, the performance of medium-voltage fire-resistant cables meets the requirements of rated voltage 6kV (Um=7.2kV) to 35kV (Um=42kV) extrusion negative insulation fireproof power cables. The technical specification stipulates that the test temperature and time of medium-voltage fire-resistant cables are: 750 ° C, 90 minutes, no impact and water spray during the test, the medium voltage fireproof cables produced by domestic enterprises are also tested according to this technical specification, which is essentially a medium voltage fireproof cable, which cannot achieve the effect of fireproofing
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[0017] Cable structure of the present invention sees figure 1 , the following table is the specifications of two specific embodiments.
[0018]
[0019] The specific embodiments described above have further described the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above descriptions are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.
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Abstract
The invention discloses a medium-voltage fireproof cable for a green building. From the inside to the outside, the cable sequentially comprises a cable core, a metal heat conducting layer, a low-smoke halogen-free thermal insulating layer, a metal fire-blocking layer and a low-smoke halogen-free external sheath layer, wherein the cable core consists of an insulating wire core and a mineral filling layer. The metal heat conducting layer is a metal tape which is arranges spirally, wherein the thickness of the metal tape is 2mm, and the interval between the peak and valley of the spiral is 3-5 mm. The external diameter is 13-15mm greater than the external diameter of the cable core after the metal heat conducting layer is set. According to the invention, the performance of the cable meets the requirements of fireproof, impact and water spraying testing of the standard BS8491: 2008. The test fire temperature is 830-870 DEG C, and the fire resistance test is carried out for 120min. The cable can withstand impacts for 12 times and water spraying for three times while withstanding the fire resistance test, and is a real medium-voltage fireproof cable.
Description
technical field [0001] The invention relates to a medium-voltage fireproof cable for green buildings. Background technique [0002] Usually, the performance of medium-voltage fire-resistant cables meets the requirements of rated voltage 6kV (Um=7.2kV) to 35kV (Um=42kV) extrusion negative insulation fireproof power cables. The technical specification stipulates that the test temperature and time of medium-voltage fire-resistant cables are: 750 ° C, 90 minutes, no impact and water spray during the test, the medium voltage fireproof cables produced by domestic enterprises are also tested according to this technical specification, which is essentially a medium voltage fireproof cable, which cannot achieve the effect of fireproofing. Contents of the invention [0003] The object of the present invention is to provide a medium-voltage fireproof cable for green buildings. [0004] The technical solution for realizing the purpose of the present invention is: a medium-voltage fire...
Claims
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IPC IPC(8): H01B7/29H01B7/42
CPCH01B7/29H01B7/292H01B7/42H01B7/421H01B7/428
Inventor 贺海飞刘华军霍战营沈立君张右
Owner FAR EAST CABLE