... the equipment for power transmission and distribution, which is charactorized by the huge capacity in transmission, low consumption in wiring, ... : 50/60Hz3. Rated current: 100,200,250,400,630,800,1000,1250,1600,2000,2500,3150,4000,5000A.4. Insulating resistance: under ... bear the relevant thermal stress and electrodynamic force created by tolerance current.. High Intensive Sealed Insulating Bus Duct