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        高壓互感器作用

        2014/1/10 9:15:26      點擊:
         高壓互感器 的作用有以下幾方面:
        將一次回路的高電壓和大電流變?yōu)槎位芈返臉?biāo)準(zhǔn)位,通常額定二次電壓為100V,額定二次電流為5A,使測址儀表和保護裝置標(biāo)準(zhǔn)化,以及二次設(shè)備的絕緣水平可按低電壓設(shè)計,從而結(jié)構(gòu)輕巧,價格便宜。
        所有二次設(shè)備可用低電壓、小電流的控制電纜連接,使屏內(nèi)布線簡一單、安裝方便。同時,便于集中竹理,可實現(xiàn)遠方控制和測量。
        二次回路不受一次回路的限制.可采用Y形、△形或V形接法,因而接線靈活方便。同時,對二次設(shè)備進行維護、調(diào)換以及調(diào)整試驗時,不需中斷一次系統(tǒng)的運行,僅適當(dāng)?shù)馗淖兌谓泳即可實現(xiàn)。
        使二次設(shè)備和工作人員與高電壓部分隔離,且互感器二次側(cè)均接地,從而保證了設(shè)備和人身的安全。
        在交流電路中,常用互感器把高電壓轉(zhuǎn)換成低電壓,大電流轉(zhuǎn)換成小電流,此后再供測量、控制、保護用。這樣不但可以加大測量儀表從程,便于儀表標(biāo)準(zhǔn)化,降低控制、保護設(shè)備的電壓和電流,而且使儀表與設(shè)備或高壓電路隔開,保證儀表、設(shè)備和工作人員的安全
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