Why does the Sepam Series 20, 40,60 and 80 Relay not display waveforms for all phases of current / voltage?



Trying to look at waveform but its only showing one phase.

Product Line     
Sepam 20 Series
Sepam 40 Series
Sepam 60 Series
Sepam 80 Series

When certain variables are calculated rather than acquired (measured) by Sepam, the waveform associated to those variables is not available. Those variables are calculated by a software program, based on the "phasors" derived from signal processing ("sin/cos" filter). For those variables, "not valid" appears in the related field in the disturbance recording file. This may occur for I2, Ir, Vr, U32, U13, according to the set-up. See the example below.