... :class 1.5Specification:0.1A,0.5A,1A,3A,5A,7A,7.5A,10A,15A,20A. For 10A-10KA,use external current transformer ... with secondary current 1A or 5ASpecificanon of voltmeters:3V,5V,7.5V ... ,200V,250V,450V500V,600V, For450-450KV meters can use potential transformer with secondary voltage 100V.Heat resi stance:Case of non ...