good quality and competitive professional technicist advanced equipments 1 StandardGB 5023.11997 , JB 8734.15-1998, Q/ZEL 02-2002, GB 5023.17-1997, IEC2272 Voltages U0/U: 450/750V300/500V300/300V.(600/1000V also available)Max. permissible continuous operating temperature of the conductor: 70The ambient temperature under installation should not below 0.Impedance (ohms): 100±2ohm3 ApplicationThe ...