Hubei Tianrui Electronic Co., Ltd is a province-level high and new technology enterprise. Its establishment was reviewed and affirmated by China Hubei Provincial Science & Technology Department and was approved by Hubei provincial administrative authorities for industry and commerce. The company is specialized in manufacturing the electronics components for the electric power automation equipments and their parts. Since its establishment, our company has devoted itself to the research and development, manufacture¼Œsales and service of the magnetic sensors and their electronic components and parts depending on universities, colleges and research institutions, such as National Non-crystalline and Microcrystal Research Center, Huazhong University of Science and Technology, Research Institute of Beijing Shougang, Wuhan High Voltage Research Institute, etc. Since its establishment in June 1996, the plant area of 15, 000 square meters, of which 5, 000 square meters is the construction area for production, and more than 250 equipments for every kinds of productions, tests and detections. Our technical force is strong with test facilities well-provided, and production facilities well-equipped. In 2003¼Œthe company passed the certificationof ISO9001€”2000 International Quality Management System. The leading products of the company are TR Series mini sophisticated current and voltage Converters¼ˆtransformers¼‰, the transformers used specially for electricity meter, the transformers used specially for the protection of motor, the current transformers for the zero-sequence current, Honeywell sensors, transducers and the equipments for GPS time synchronization. The company is an agent of Satec multifunctional electrical measuring instruments (Israel) ¼Œthe performance of which is very stable, and consequently the products passed the random inspections by related departments.