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Underground Cable Calculation

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AAS.Suja

Member
Location
Sri Lanka
Occupation
Trainee Electrical Engineer
  1. Calculate the temperature rise in a system consisting of six conductors carrying 1500 amperes each at 132kV, insulated with XLPE, and spanning a cable length of 9 meters. The system is enclosed within a chamber with the following dimensions: length 10 meters, width 10 meters, depth 3000mm. The ambient temperature is 30 degrees Celsius, and the chamber is one surface is exposed to air, with concrete walls that is 0.5 meters thick other five surface is connected with soil. What is the expected temperature rise within this system?
  2. To maintain the cable temperature at 35 degrees Celsius, how much power must be supplied through ventilation to dissipate the excess heat generated within the system?
  3. Under stable conditions, what would be the equilibrium temperature of the cables, given the heat generation, ventilation power, and the surrounding environmental conditions as described above?
 
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