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互感器的基本知识
Basic knowledge For Transformer

型号含义 | Meaning Of Model

□□□□ □ - □ □
结构代号 /Structure code
额定电压等级 /Rated voltage grade (kV)
设计序号 /Design No.
型号字母 /Model letter

电流互感器和电压互感器的型号组成分为两部分，前一部分为产品型号字母和设计序号，后一部分为额定电压等级 (kV) 和结构代号。( 型号字母含义附后 )。
The model compo sition of current transformer and voltage transformer is divided into two parts.The first part is product model letter and design number and the latter
part is rated voltage grade(kV)and Structure code.(the definition of model letter is shown as below).

概述 | Description
互感器是电力系统中重要的电器设备之一，它和电力变压器相似，也是用来转换线路的电压或电流。但是，电力变压器转换电压和电流的目的，在于传递电
能，互感器转换电压或电流的目的，在于测量和监视线路的电压或电流。一般来说，电力变压器的容量大，电压或电流的变化误差也大，互感器的容量小，
电压或电流的变化误差则较小。在测量线路中，用来转换电流，向电流仪表和继电器供电的互感器叫做电流互感器，用来转换电压，向电压仪表和继电器供
电的互感器叫做电压互感器。

The transformer is one of important electrical appliances in electric system.It's similar to power transformer and also used to transform voltage or current in the circuit.
However,transforming voltage and current by power transformer aims at transferring electric energy while transforming voltage current by transformer aims at measuring
and monitoring voltage or current in the circuit.Generally.power transformer owns large capacity as well as large change difference of voltage or current.While
transformer owns small capacity as well as smaller change difference of voltage or current. In measuring circuit/the transformer that transforms current and supplies
electricity for current meter and relay is called current transformer.The transformer that transforms voltage and supplies electricity for voltage meter and relay is called
current 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；
◆ 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.

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