FREJA 300 Relay Testing System Repair & Calibration at Dynamics Circuit (S) Pte. Ltd. The FREJATM 300 relay testing system is a computer-aided relay testing and simulation system. The weight of FREJA 300 is only 15 kg. The rugged hardware design is built for field use over a wide temperature range, with the possibilities of intelligent software to perform rapid testing. FREJA 300 can be operated with or without a PC. After being put into the Local mode, FREJA 300 can be used stand-alone without