The ZSFRH-35KV high-voltage phase comparator from Wuhan Zhongshi Gaocedi Electric Co., Ltd. is a new type of phase comparator used to determine whether two power grids (generating units) have the same phase. It features high-performance insulation materials and easy installation. During phase comparison, there are language and light prompts regardless of whether the phases are the same. The phase comparator has an automatic power switch, which is convenient and energy-saving. The product's characteristics include Martin heat resistance, impact resistance, bending resistance, surface resistivity, and volume resistivity. The product can be used in systems of 6, 10, 35, 66, 110, 220, 330, and 500KV.