... Rectifier Accuracy:Class 1.5 Spec.:0.5A,1A,1.5A,3A...20A. For 10A-10KA,use external current transformer...... ... Square Type Moving Coil AC Ammeter wtih Rectifier 240°1. Model: 240°SF- ... , 10A, 15A, 20A.For 10A-10KA,Use external current transformer, which secondary current is 5A or 1A. 4. Case: ... enquiry, welcome to contact us. AC Ammeter with Rectifier