度外sm绝缘子批发sm25绝缘子sm30绝缘子sm35绝缘子sm40绝缘子sm51绝缘子sm60绝缘Application: communication, electric power, lightning protection, machinery, medical, wind energy, frequency conversion equipment,new energy vehicles (integrated chassis cabinets, locker, etc.) Advantage:high intensity electrical resistance heat,fire,water resintance low srinkageUsually there are 3 class insulator:A class :high strength glass fibre(BMC/SMC) +A class brass insert(steel with Ni insert |