Electric cables. Internal gas-pressure cables and accessories for alternating voltages up to and including 275 kV ($iU$dm = 300 kV). Requirements and test methods— 30 стр.
Electric cables. Fluid-filled, paper- and PPL-insulated, metal-sheathed cables and accessories for alternating voltages up to and including 400 kV ($iU$dm = 420 kV). Requirements and test methods— 46 стр.
