... and three phase portable working standards, ideal for on site testing. It is a three phase portable standard meter used to verify active and reactive three phase ... Accuracy in direct connection: a) Active energy: typical: 0,1%, worst case: 0. ... 2%. b) Reactive energy: typical: 0,15%, worst case: 0 ... Accuracy with current clamps: a) Active energy: typical: 0.2%, worst case: 0,5 ...