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Advisory保型抗生物交聯(lián)電纜-17490171358.JPG)
ProductUsage:
This product is suitable for 220KV power transmission and distributionsystem for power transmission purposes. Widely used in electric power,construction, mining, metallurgy, petroleum, transportation and otherdepartments, widely used in temperate and subtropical multi-ant area.
Implementationstandards:
The implementation standard of 220kV product is GB / Z18890-2002"XLPE insulated power cable with rated voltage of 220 kV (Um = 252 kV) andits accessories" and IEC62067 "rated voltage of 150kV (Um = 170kV)Extruded insulated power cables and accessories of the power cable system"
Anti-termite properties in line with GB 2951.38 requirements;
Usefeatures:
1、Maximum rated temperature
Long-term maximum allowable operatingconductor temperature: 90 °C,Maximum operating temperature under short-timeoverload: 130°C，Maximum operating temperatureunder short circuit (short circuit duration 5 s): 250 °C
2、Installationrequirements
Cable laying shall not be restrictedby drop height; the ambient temperature for laying shall not be lower than 0 °C,and if the ambient temperature is lower than 0 °C, the cable shall bepre-heated.
2.1 Minimum bending radius of cable
During cablelaying: 20D0; and Permanentinstallation: 15D0.
Note: D0 is measured outerdiameter of cable.
2.2Maximum allowable axial traction for cableinstallation, T (radial side pressure at bend not being considered)
Conductor: T=K×Conductor section (kg)
Aluminum sheath:T=K×Aluminum sheath section(kg)
Where, the coefficient K=7kg/mm2for copper conductor and 4kg/mm2 for aluminum conductor and 2kg/mm2 for aluminum sheath.
2.3PMaximum allowable side pressurewhen cable is bent, P
P=T/R≤500(kg/m), where T is axialtraction, and R is bending radius.
