Rectang/Round Moving Iron AC Ammeters Accuracy:Class 1.5 Spec.:0.1A,0.5A...60A.For 10A-10KA, ... use external current transformer.. RectangRound Moving Iron AC Ammeters 1. ... .2. Accuracy: Class 1.5.3. Specification: 0.1A, 0.5A, 1A, 3A, 5A, 7.5A, 10A, 15A, 20A, ... use external current transformer with secondary current 5A or 1A,When Connected directly with current 50A, 60A, ...