... enough channels to construct large monitoring systems. Powerful DSP digital signal processors calculate the data from the RAU and provide ... window trig, ROC trig; Harmonic, single phase P,Q, 3 phases P,Q, frequency, Positive sequence voltage, Negative sequence voltage, Zero ... the other one would be on duty. FTR-01 Digital Fault Recorder series(Concentrating or distributing application):FTR-01S series ...