ParameterConductor materialCable sectionHighest voltage for equipment Um Rated Voltage U0 Lightning impulse withstand voltageRated continuous currentRated short-time current IR Duty cyclesOperating time in a dayOperating days in a yearDesign lifetime"Maximum exceptional short- circuit symmetrical current"Current peak in all conditions (rating/fault)Nominal frequencyOperating frequencyNumber of phasesNumber of parallel cables per phaseLength per phase