Technical Specifications of Power Cable Cross linked polyethylene (XLPE)single core power cable for underground use. Rated voltage:132kV Microsoft Word-Section 5-General Technical Specification Cable Rated voltage ofthe three phases 50 Hz system: U = 132 kV Highest system voltage:U+ 10 % Urn =145 kV Specified voltage Eo=76 kV Maximum impulse withstand voltage (1,2 / 50) Ep = 650 kV Earth fault current and duration:25000 Amps-0.5 s