... ,25A,30A,40A,50A,60A,75A,100A(TFY-120 directing reading is from 0.1A to 30A) For 10A-10KA,use external current transformer ... with secondary current 1A or 5A)Notes:60A,75A ... ,250V,450V,500V,600V,For450-450KY meters can use potential transformer with secondary voltage 100V.Heat resi stance:Case of non ...