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Advisory
ProductUsage:
This product is suitable for 220KV power transmission system. A total oftransmission of electrical energy, with online temperature monitoring system.Facilitate the power sector on the transmission line operation monitoring andmaintenance, widely used in the power sector.
Implementationstandards:
The implementation standard of 220kV product is GB / Z18890 "XLPEinsulated power cable with rated voltage of 220 kV (Um = 252 kV) and itsaccessories" and IEC62067 "with rated voltage of 150kV (Um = 170kV)to 500kV (Um = 550kV) Insulated power cables and accessories power cable system."
ProductUsage:
This product is suitable for 220kV power transmission and distributionsystem for the transmission of electrical energy, with online temperaturemonitoring system to facilitate the power sector on the transmission lineoperation monitoring and maintenance, widely used in the power sector.
Usefeatures:
Maximumrated temperature
Long-term maximum allowable operatingconductor temperature: 90 °C，Maximum operating temperatureunder short-time overload: 130°C,Maximum operating temperature under shortcircuit (short circuit duration 5 s): 250 °C
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: 22D0; and Permanentinstallation: 18D0.
Note: D0 is measured outerdiameter of cable.
2.2 Maximum allowable axial tractionfor cable installation, 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.
2.3 Maximum allowable side pressurewhen cable is bent, P
P=T/R≤500(kg/m), where T is axialtraction, and R is bending radius.
