Our relay protection tester offers comprehensive testing for both optical digital and traditional protective devices. It's ideal for power plants, substations, equipment manufacturers, and institutions needing relay protection evaluations. Protection Suite includes an expansive collection of. The main control board is DSP + FPGA architecture, 16 bit DAC output, generates high - density sine wave 2000 points each circle to fundamental wave, which greatly improve the wave quality and the accuracy of the test instrument. Classic Windows XP operating interface, friendly man-machine. Protection relay tester which offers all the characteristics and functions needed for protective relay testing, in a manual or automatic mode, designed for maximum efficiency, flexibility and simplicity, with the required accuracy and performance to test any kind and type of relays in all. A protection relay tester is a professional electrical testing device used to verify whether protective relays operate correctly during faults such as overcurrent, overload, short circuit, voltage fluctuation, or frequency abnormalities. These relays are critical for protecting transformers. Power System protection is crucial part of power station and substations safety which use protection relays and circuit breakers to isolate faulty parts or zones within the plant including Generator zone, Motor zone, Feeder zone, Bus zone, Transformer zone and Transmission Lines zone.