Products characteristic
Executive standard
GB/T28427-2012
Range of application
This kind of cables are mainly applied in AC single phase, power frequency, electric railways with rated voltage 27.5kV, power supply of self-coupling transformers and feeder lines from traction
Operating characteristic
1、Rated voltage is 27.5kV.
2、Max. long-term allowable working temperature for cable conductor is 90℃. Max. temperature of conductor allowable for cable conductor is 250℃.
3、Min. bending radius is 15 times of outer diameter in cable laying.
4、For low halogen low smoke flame retardant cables, the min. light transmittance of smoke should be no less than 30%, pH value of burning gas should be no less than 2.5, conductivity should be no more than 30µs/mm, and spill of halogen acid gas should be no more than 100 mg/g.
5、For halogen free low smoke flame retardant cables, the minimum light transmittance of smoke should be no less than 60％, pH value of burning gas should be no less than 4.3, conductivity should be no more than 10µs／mm.
6、Cables comply with class C flame retardant requirements in GB/T 18380.35 standard.
7、Cables have radial moisture barrier.
8、It is not allowed to lay the cables in steel pipelines, but can be laid in non-magnetic pipelines.
