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Plastic Insulated High Performance Flame-retardant Medium Voltage Power Cable
Product standard
The product is manufactured according to the standard of GB/T12706-2002,GB/T18380.3-2001,GB/T17650-1998 and GB/T17651-1998 or IEC and DIN and ICEA.
ApplicationsThe product is suitable for power transmission and distribution lines with rated voltage 0.6/1 KV~26/35KV.
Operating characteristicsRated power frequency voltage U0/U: 0.6/1KV~26/35KV.
PVC insulated power cable Max. permissible continuous operating temperature of the conductor should not exceed 70℃, XLPE permissible continuous operating temperature of the conductor should not exceed 90℃.
Max. Short-circurrt temperature of conductor shall not exceed: PVC insulation 160℃, XLPE insulation 250℃. (5s maximum duration)
The installation temperature should not below 0℃
The flame-retardant properties of cable comply with the requirements specified in A kind of GB/T18380.3-2001
The flame-retardant properties of lower halogen cable comply with requirements specified in A kind of GB/T18380.3-2001 except complying with requirements specified in GB/T17651.2-1998.
The flame-retardant properties of no halogen cable comply with requirements specified in A kind of GB/T18380.3-2001 except complying with requirements specified in GB/T17651.2-1998. and GB/T17651-1998.
Three bending radius of a single core should not less than 20 times of the cable diameter.
Two bending radius of a three-core cable should not less than 15 times of the cable diameter.
Voltage designationThe rated voltage of the cable for a given application shall be suitable for the operating condition in the system in which the cable is used, and is expressed in the form of U0/U (Um) are applied to the system voltages and running state, and expressed in the form U0/U (Um).
U0—The rated power-frequency voltage between conductor and earth or metallic screen, for which the cable designed.
U—The rated power-frequency voltage between conductors for which the cable designed.
Um—The maximum value of “the highest system voltage” for which the equipment may be used.
The values U0 recommended for cables to be used in three-phase systems are listed below|
U KV |
Um KV |
U0* |
|
|
A&B system |
System categories C |
||
|
1 |
1.2 |
0.6 |
0.6 |
|
3 |
3.6 |
1.8 |
3.6 |
|
6 |
7.2 |
3.6 |
6 |
|
10 |
12 |
6 |
8.7 |
|
15 |
17.5 |
8.7 |
12 |
|
20 |
24 |
12 |
18 |
|
35 |
40.5 |
21 |
26 |
The first cable-suitable for one single-phase ear thing-block time does not exceed one minute each time. Max. time not exceed 8 hours, and not exceed 125 hours in all in one year.
The second class cable-suitable for more the ear thing-block time and more better insulated performa.
