Railway cable（旧）
Railway cable, that is, the application of special wires on the railway, railway power cable is used for the transmission and distribution of electrical energy cables, commonly used in urban underground power grids, power station lead lines, industrial and mining enterprises, internal power supply and over the river and sea underwater transmission lines.
Railway cable general specifications are: 1, plastic insulation and PVC outer sheath railway signal cable 2-48 cores, mostly used in automatic device system; 2, polyethylene insulation and comprehensive outer protective sheath of 4-61 cores, can transmit general automatic signals and frequency shifting automatic blocking and other audio signals.
Characteristics
1、The ambient temperature of railway cable is -40℃~60℃;
2, railway cable allows long-term working environment temperature can not exceed 70 ℃.
3, railway cable laying ambient temperature in the railway cable, PVC protective coat of the railway cable should not be lower than 0 ℃, polyethylene protective coat of the cable should not be lower than -10 ℃.
Types and applications
Railway cables can be divided into: communication cables, signal cables, traction power supply cables, etc. according to the use. Communication cables are mainly used for communication along the railway, signal cables are used for railway signalling system, and traction power supply cables are used for electric traction. With the development of the times, these cables are not only upgraded in their traditional functions, but also play an important role in emerging fields, such as the application of optical fibre cables in high-speed railway communications.
Railway Signal Cable
Suitable for rated voltage AC 500V or DC 1000V and below to transmit railway signals, audio signals or control circuits of automatic signaling devices, in which the integrated sheath, aluminium sheath railway signal cables have a certain degree of shielding performance, suitable for electrification sections or other areas with strong electrical interference laying.
Model name
PTYV Polyethylene Insulated PVC Sheathed Railway Signal Cable
PTYY Polyethylene insulated polyethylene sheathed railway signal cable
PTY22 Polyethylene Insulated Steel Tape Armoured PVC Sheathed Railway Signal Cable
PTY23 Polyethylene insulated steel tape armoured polyethylene sheathed railway signal cable
PTYA Polyethylene insulated composite sheathed railway signal cable
PTYA22 Polyethylene insulated composite sheathed steel tape armoured PVC sheathed railway signal cable
PTYA23 (PTYAH23) Polyethylene insulated composite sheathed steel tape armoured polyethylene outer sheath railway signal cable
PTYL22 Aluminium sheathed polyethylene insulated steel tape armoured PVC sheathed railway signal cable
PTYL23 (PTYLH23) Aluminium sheathed polyethylene insulated railway signal cable with steel belt armouring polyethylene outer sheath
Use characteristics
(1) The ambient temperature of the cable is -40℃~+60℃.
(2) The long-term working temperature of cable conductor should not exceed +70℃.
(3) Cable laying ambient temperature: PVC sheathed cable should not be less than 0 ℃; polyethylene sheathed cable should not be less than -20 ℃.
(4) The permissible bending radius of the cable: non-armoured cable should be not less than 10 times the outer diameter of the cable; armoured cable should be not less than 15 times the outer diameter of the cable.
(5) Ideal shielding coefficient of railway signal cable with integrated sheath ≤ 0.8; Ideal shielding coefficient of railway signal cable with aluminium sheath ≤ 0.3
Delivery length of 500m and above should be not less than 50% of the total delivery length of the cable; 50 ~ 250m of the short section of the cable delivery length should be no more than 5% of the total delivery length; cable length measurement error should be no more than ± 0.5%. According to the length of delivery specified by mutual agreement
Specification
(4---61) cores X 1.0mm
Signal cable type identification
1. Signal cables include plastic sheath (PTY03, PTY23), comprehensive sheath (PTYA23, PTYA22), aluminium sheath (PTYL23, PTYL22) signal cables according to the type of sheath;
2. Signal digital cables are divided into plastic sheath (SPTYW03, SPTYW23), comprehensive sheath (SPTYWA23) aluminium sheath (SPTYWL23), internal shield (SPTYWP03 or SPTYWP23, SPTYWPA23, SPTYWPL23) digital signal cables.
SP-Digital Signal Cable
T-Railway
YW-Skin-foam-skin physical foamed polyethylene insulation
P-Inner Shield
L-Aluminium sheath
A-composite sheath
23-Double steel belt armoured polyethylene outer sheath
03-Polyethylene outer sheath
