速发3相380V转3相220V230V三相自耦变压器440V变380V转480V10KVA2

三相干式隔离变压器660V480V415V380V转220伏200V10KVA2U0/30/50K

三相干式隔离变压器660V480V415V380V转220伏200V10KVA20/30/50KW