Application
This product is suitable for the ac rated voltage of 35kV and below lines, power supply, transmission and distribution energy use. It is commonly used in urban underground power grid, power station lead lines, internal power supply of industrial and mining enterprises and underwater transmission lines across the river and sea.
Standard
This product performs GB / T12706, Rated voltage 1kV(Um=1.2kV) to 35kV(Um=40.5kV) extruded insulated power cable, GB / T12706.2 Part 2: Rated voltage 6kV(Um=7.2kV) to 30kV (Um = 36kV) GB / T12706.3 Part 3: Rated voltage 35kV(Um=40.5kV).
Characteristics
1. The allowable long-term working temperature of the cable conductor is:
Maximum temperature of conductor of various insulated mixture cables (GB / T12706.2 Part 2)
Insulation mixture | Maximum conductor temperature of ℃ | |
normal operation | Short circuit (max. duration 5S) | |
Polyvinyl chloride (PVC / A) The conductor cross-sectional area is 300mm2 Conductor cross-sectional area was> 300mm2 Crosslinked polyethylene (XLPE) | 70 70 90 | 160 140 250 |
Maximum conductor temperature of XLPE insulated mixture cable (GB / T12706.3 Part III)
Insulation mixture | Maximum conductor temperature of ℃ | |
normal operation | Short circuit (max. duration 5S) | |
Crosslinked polyethylene (XLPE) | 90 | 250 |
2. The ambient temperature during the cable laying shall not be lower than 0℃;
3. Minimum allowable bending radius during cable laying:
project | single conductor cable | bank cable | ||
Minimum bending radius of the cable during installation | No armor | There is armor | No armor | There is armor |
20D | 15D | 15D | 12D | |
Note: D is the cable outer diameter |
4. Rated voltage
5. The rated voltage of U0 / U of GB / T12706.2) is 3.6/6(7.2)kV, 6/6(7.2)kV, 6/10(12)kV, 8.7/10(12)kV, 8.7/15 (17.5) kV, 12 / 20 (24) kV and 18 / 30 (36) kV.
6. GB / T12706.3 Part III: The cable power frequency rated voltage U0 / U (Um) is 21 / 35 (40.5) kV and 26 / 35 (40.5) kV.
7. U0: the rated power frequency voltage between the conductor to the ground or to the metal shield used for the cable design;
8. U: Rated power frequency voltage between the conductors used for cable design;
9. Um: maximum of "maximum system voltage" that the device can withstand.
Testing
Rated voltage: U0 (kV) | 6 | 8.7 | 12 | 21 | 26 |
Test voltage: U (kV) | 21 | 30.5 | 42 | 73.5 | 91 |
Duration (min) | 5 | 5 | 5 | 5 | 5 |
Local discharge shall be specified by GB/T3048.12-2007. When voltage is 1.73 U0, no local discharge and no breakdown in 5min voltage test.
The performance of the flame-retardant and halogen-free low-smoke cable complies with the provisions of GB / T19666-2019 and GB / T18380-2008.
Cable Models
model | name | |
Copper core | Aluminum core | |
YJV YJY YJV22 YJV23 YJV32 YJV33 | YJLV YJLY YJLV22 YJLV23 YJLV32 YJLV33 | Crosslinked polyethylene insulated PVC sheathed power cable Crosslinked polyethylene insulated polyethylene or polyolefin sheathed power cables Crosslinked polyethylene insulated steel strip armoured PVC sheathed power cable Crosslinked polyethylene insulated steel strip armoured with polyethylene or polyolefin sheathed power cables Crosslinked polyethylene insulated fine round steel wire armoured with PVC sheathed power cable Crosslinked polyethylene insulated fine circular steel wire armored with polyethylene or polyolefin sheathed power cables |
The model in the table does not contain the flame retardant characteristics |
The performance of the flame-retardant and halogen-free low-smoke cable complies with the provisions of GB / T19666-2019 and GB / T18380-2008.
Cable structure and physical pictures