一、概述 Introduction         我公司多年来采用优质材料和先进的工艺技术专业生产150VA到600KVA之间，SG系列三相干式变压器，是我公司参照西门子公司同类产品最新研制开发数控系统用变压器，尤其150VA-16KVA之间的三相干式变压器，它们的外形和安装尺寸已经标准化，与西门子4AP系列通用，产品符名VDE0550、IEC439、JB5555、GB226等国际、国家标准。         SG系列三相干式变压器广泛适用于交流50-60Hz，输入、输出电压不超过500V的各种三相供电场合。产品的各种输入、输出电压的高低、联接组别、调节抽头的多少及位置（一般为±5%），绕组容量的分配、次级单相绕组的配备、整流电路的运用、是否要求带外壳等，均可根据用户的要求进行精心的设计与制造。ZSG系列三相干式整流变压器供整流设备。整流后作充电、电压调节及直流电源之用。         SG series three-phase dry - type transformer is suitable for all kinds of three-phase power supplycircuits with AC50-60Hz,input andoutput voltage up to 500V,Especially for transformer with 150VA-16KVA,their shape and installing dimension are standar dized and can beused together withSiemens4AD series.SG series confirm to VDE0550,IEC439,JB555,GB226 and other international and national standard.According to used demands,we can design and produce products with dirrferent input & output voltage,coupling group,quantity and position ofadjusting tab(usually ±5%)，distribution of roll group,secondary single-pole roll group.二、型号及其含义 The code No .and meanings三、外形及安装尺寸 Shape and mounting dimensionSG、ZSG、SBK的外形及安装尺寸见下表及图1、图2、图3Dimension and install ation of SG、ZSG、SBK series transformersee table（Pcture1、Picture2、Picture3）注：     1、空格未注尺寸，按用户要求待定，所列尺寸供参考；输出电流大于300A的产品为特殊定做产品，产品尺寸会相应改变。     2、表中所列的额定输入，输出电压根据需要可以任意组合。     3、表中所列的电压和尺寸，可根据用户要求协商确定。Note:   1.For the blanks without dmens on,they are waiting for users demands and the listed dimension are only for  referencel;for the special whose      output current exceed 300A,the product's dimension will be changed corresponding to the current,   2.The listed rated input & output voltage in the table can be assembled freely according to special demands.   3.The voltage and dimension listed in the table can be ascertained according to theuser's demands.