Type:Single-Phase /Three Phase ; Standard:IEC521; Rated Current:2(4),2.5(5),3(6),5(10),10(20),20(40), ... for measuring 50Hz rated frequencies and power loss in electrified wire netting.All technical targets completely conform to the GB/T15283-94 ... : Type:Single-Phase /Three Phase ;Standard:IEC521;Rated Current:2(4),2.5(5),3(6),5(10),10(20),20(40 ...