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互感器的基本知识
Basic knowledge For Transformer

互感器的分类 /Trandformer Assortment

◆ 按原理分类：电压互感器可分为电容式电压互感器和电磁式电压互感器：电流互感器分为电磁式电流互感器和电子式电流互感器； A
◆ 按绕组外绝缘介质分类 , 有干式、油浸式和充气式 (SF6)；
◆ 按用途分类：可分为电压互感器、电流互感器两大类 , 又可分为测量用、保护用、特殊用途及精密型四类；
◆ 按安装地点分类：可分为户内式和户外式两种；
◆ 电压互感器按相数分类：可分为单相、三相两种；
◆ 电压互感器按绕组数分类：有双绕组、三绕组两种；
◆ 电流互感器按安装方式分类：有穿墙式、支持式和装入式三种；
◆ 电流互感器按电流比分类：有单变比、多变比。
◆ According to principle, the voltage transformer can be sorted into capacitor type voltage transformer and electromag netic type voltage transformer.Current
transformer is the one of electromagnetic type.
◆ According to winding external insulation medium,transformer can be sorted into dry type,pouring type,oil-immersed type and inflating type.
◆ According to function,transformer can be sorted into voltage transformer and current transformer,It also can be sorted into four types.for measurement,for
protection,special purpose and preecision type.
◆ According to installation site,transformer can be sorted into indoor type and outdoor type.
◆ According to the number of phase,voltage transformer can be sorted into single-phase and three-phase types.
◆ According to the number of winding,voltage transformer can be sorted into double-winding and three-winding types.
◆ According to mode of installation,current transformer can be sorted into through-wall type,support type and enclosing type.
◆ According to current ratio,current transformer can be sorted into single transformation ratio and multiple transformation ratio type.

适用工作条件 /Applicable Working Conditions

◆ 海拔高度不超过 1500 米。( 高原地区使用时，请提供海拔高度 )；
◆ 周围气温最大变化不超过 -5℃到 40℃ ( 特殊要求时，请在订货时注明 )；
◆ 普通型产品使用在相对湿度不大于 85% 的地区；
◆ 安装场所无严重影响互感器绝缘的气体、蒸汽、化学性沉积、灰尘污垢及其他爆炸性和腐蚀性介质，并无严重的震动和颠簸。
◆ The height above sea level is not above 1500m.(Please indicate height above sea level if it is used in highland area).
◆ Max.change of environmental temperature doesnit exceed 5℃ to 40℃ .(If there any requirement,please indicate in the order).
◆ Ordinary products can be used in the area with relative humidity not above 85%.
◆ There is no gas, steam, chemical sedimentation, dust or dirt or other explosive and corrosive medium that seriously affect transformer at installadtioh site.There is no
serious vibration or bump.Either.

注意事项 /Precautions
◆ 电流互感器一次有电流通过时，二次绕组不得开路，否则有高压产生，对产品性能亦有影响；
◆ 电压互感器二次绕组不得短路，否则互感器将被烧毁；
◆ 一次绕组的重复工频耐压，试验应在规定试验电压值的 80% 下进行。

◆ While the primary current goes through current transformer,the open circuit of secondary winding is not allowed,other wise high voltage will produce and affect the
performance of product.
◆ The short circuit of secondary winding of voltage transformer is not allowed,otherwise the transformer will be burned.
◆ The repeated power frequency withstand voltage test of primary winding shall be conducted under 80% of stipulated test voltage value.

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