Profile: Power Advance Tech. Co., Ltd. specializes in research, development & manufacturing of test systems for protective relay & power automation systems. Our product line includes relay test & universal calibration systems, circuit breaker simulators, GPS synchronization devices and relay test software. Our universal test system has 4 voltage and 6 current outputs. It is controlled by powertest software that can test all types of protective relays. Our PW400 relay test kit family provides complete solutions for different relay test applications. Our PWF digital relay testing system is designed for IEC61850 relay test applications. The three fiber optical ports configuration enables it to receive goose messages from three relays separately. This feature is important when testing IEC61850 based differential relays, where three separate goose messages from the differential relay should be sent to the separate goose ports of the relay testing system. The Ethernet port also enables the remote control of the test process via internet. Our circuit breaker simulator is used to work together with the relay test kit for checking the whole protective relay system, including tripping & closing circuitry, while avoiding the operation of actual circuit breaker. Our PW460 universal test system is designed with 4x300V and 6x15A generators, capable of testing all types of protective relays.