Profile: Chengdu Tianjin Instrument Co., Ltd. specializes in developing portable relay testers and power amplifiers for power sector. We also offer complete testing solutions for the manufactures of equipment for generation, transmission and distribution of power. Our digital protection relay test system MF3000 is a test equipment for optical digital protection device. Our single phase relay testing kit includes two current generators and one voltage generator, all can output AC and DC. The generators are electrically isolated and independent with respect to amplitude, phase angle & frequency. It has a built in flash memory to save test results. Our circuit breaker tester has a powerful analyzing software which accurately analyze the data and helps in obtaining the characteristics of the breaker being tested by finding the potential defects. We are an ISO 9001:2000 certified company.