Sepam - HV/MV Protection and control units (ENG) - Trinet

Testing of Qs set pointv using single-phase, inject Uns into the U21 input and current I into the I1 input,with a phase shift of a between I and U in accordance with the following chart:Reverse Q Over Qfeeder -90° 90°incomer 90° -90°v gradually increase the current until the associated output relay picks upv read the reactive power value on the Sepam 2000 display unit or on the pocketterminalv calculate the reactive power value:Q = Uns X Ior Q = Uns X I. sin aTesting the operating planv using single-phase, inject Uns into the U21 input and current I into the I1 inputI = 2 Qs / Unsv vary the phase shift a between Uns and I from 0° to 360°.The protection should operate for the following values of a:Reverse Q Over Qfeeder -30° and -150° 30° and 150°incomer 30° and 150° -30° and -150°Testing of time delayc parameter settingv set T to the desired valuec testv inject voltage Uns into U21v preset current I1 to 1.2 times the value of Qs/Uns with a phase shift of +90° or+270° according to the type of protection being tested (reactive overpower orreactive reverse power)v stop current injection onlyv press the Sepam 2000 reset key and set the chronometer to zerov start up current injection and the chronometer at the same timev the Sepam 2000 relay stops the chronometerv read the t value on the chronometer.Sepam 2000 - Testing 1/47