... plate, beautiful appearance. and reasonable design CFW series high-intensive sealed insulating bus duct is ideal to be used in the ... ,250,400,630,800,1000,1250,1600,2000,2500,3150,4000,5000A.4. Insulating resistance: under normal working condition, the value ... stress and electrodynamic force created by tolerance current.. High Intensive Sealed Insulating Bus Duct