Profile: Zhejiang Hengda Electric Science and Technology Co., Ltd. is a manufacturer of HV electric power transmission and distribution equipment. We are an ISO 9001:2000 certified company. Our products include metal oxide surge arresters, composite insulators, expulsion fuse cutout, disconnecting switches and zinc oxide varistors. We manufacture various metal-oxide surge arresters such as polymer housed, porcelain housed, and station class surge arresters. We carry a wide range of composite insulators that include suspension, DS series, pin type, station post, and line post insulators.