15
Alternative voltage sag
indices
lDetroit
Edison sag score
Sag Score=1- (|Va|+|Vb|+|Vc|)/3
lVoltage
Sag - Lost Energy index (VSLEI)
W = (1- Vpu)3.14 T
lSRP
energy served index
ES = (Vactual)2T/(Vrated)2T
l
Background