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互感器的基本知识
Basic knowledge For Transformer

型号含义 /Meaning Of Model

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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.

互感器特殊使用环境代号 /Specific Suing Environment Code Of Transformer

◆ 高原地区用代表符合："GY"； ◆ Code of using in highland area:"GY".
◆ 腐蚀地区用代表符合："F"； ◆ Code of using in currosive area:"F".
◆ 干热带地区用代表符合："TA"； ◆ Code of using in drytropic region:"TA".
◆ 湿热地区用代表符合："TH"； ◆ Code of using in wet tropic region:"TH".
◆ 干、湿热带地区代表符合："T"； ◆ Code of using in dry-wet tropic region:"T".
◆ 温升限值比标准规定限值降低5K以上时，用"WS"表示； ◆ " WS"denotes the occasion that wet-rising limit value is 5K lower than standard stipulated value.
◆ 污秽地区用代表符号见下表： ◆ See the table for code of using of using in polluted area:

GB5582-85 中规定
污秽地区使用代表符号 Stipulated in GB5582-85
Using represen-tative symbol of pollted are 污秽等级 最小公称爬电比距 (mm/kV)
Polluted area class Min nominal creepage specific distance
- 0 14.8

- I 16

W1 II 20

W2 III 25

W3 IV 31

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