27.5kv (kilovolt) single-phase ac (alternating current) waterproof flame-retardant environmentally-friendly electrified railway power cable

Abstract

The invention discloses a 27.5kV single-phase AC waterproof, flame-retardant and environmentally friendly electrified railway power cable. The 27.5kV single-phase AC waterproof, flame-retardant and environmentally friendly electrified railway power cable includes an insulating core, and a comprehensive shielding is provided outside the insulating core. A comprehensive waterproof layer is provided outside the comprehensive shielding layer, a comprehensive flame-retardant and fire-insulating layer is provided outside the comprehensive waterproof layer, and a comprehensive protective layer is provided outside the comprehensive flame-retardant and fire-proof layer. The invention has the ability to carry relatively large short-circuit current, high flame retardancy, good water resistance, weather resistance, anti-animal biting, anti-mechanical damage and environmental protection performance, so it has a high service life and high safety and reliability and meet special environmental requirements.

Description

technical field [0001] The invention relates to an electrified railway power cable, in particular to a 27.5kV single-phase AC waterproof, flame-retardant and environment-friendly electrified railway power cable. Background technique [0002] With the rapid development of large-scale passenger dedicated lines, due to the influence of terrain and environmental factors, the use of 27.5kV special cables for electrified railways is becoming more and more common, and there are more and more cases of cable faults affecting traffic. The technical standard for 27.5kV special cables is GB / T 28427-2012 "27.5kV single-phase AC XLPE insulated cables and accessories". Without animal bite test requirements, low temperature performance can only reach -15°C, and no longitudinal water blocking requirements, etc., it is difficult to meet various environmental conditions on the electrified railway site, which poses a threat to the safe and reliable operation of the cable. Contents of the inve...

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Problems solved by technology

[0002] With the rapid development of the construction of large-scale passenger dedicated lines, due to the influence of terrain and environmental factors, the use of 27.5kV special cables for electrified railways is becoming more and more common, and there are more and more cases of cable faults affecting traffic. The technical standard for 27.5kV special cables is GB / T 28427-2012 "27.5kV single-phase AC cross-linked polyethylene insulated cables and accessories". Without animal bite test requirements, low temperature performance can only reach -15°C, and no longitudinal water blocking requirements, etc., it is difficult to meet various environmental conditions on the electrified railway site, which poses a threat to the safe and reliable operation of cables

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