概述Summary1、FN3-12、FN3-12R、FN3-12R/S負(fù)荷開(kāi)關(guān)系戶內(nèi)裝置的高壓電器。適用于交流50Hz、6KV或12KV的網(wǎng)絡(luò)中，作為開(kāi)斷和閉合負(fù)荷及過(guò)荷電流之用，亦可用作開(kāi)斷和閉合空載長(zhǎng)線?？蛰d變壓器及電容之開(kāi)關(guān)。帶有RN3型熔斷型的負(fù)荷開(kāi)關(guān)(FN3-12、FN3-12R/S)可切斷路器，作保護(hù)開(kāi)關(guān)之用。2、本負(fù)荷開(kāi)關(guān)可配用CS3型及CS2型手動(dòng)操作機(jī)構(gòu)進(jìn)行操作。1、FN3-12、FN3-12R、FN3-12R/S Series are used in the network of AC 50Hz、6KV or 12KV for breaking or closing load and over-load current. they are also used in breaking and closing no-loading . The switch or no-load transformer and capacitor with KN3 te fuse box. Can cut off short-circuit for protecting switch.2、They can be equipped with CS3 te and CS2 te handle operating mechani.工作條件Serviec Condition1、海拔不過(guò)1000米；2、周?chē)諝鉁囟炔桓哂?40oC及不低于-10oC；3、空氣相對(duì)濕度不大于90%的戶內(nèi)場(chǎng)(當(dāng)溫度為+25)；4、無(wú)導(dǎo)電性塵埃的環(huán)境中；5、無(wú)破壞金屬和緣的腐蝕性氣體的物體；6、無(wú)劇烈震動(dòng)和沖擊的地方；7、無(wú)燃燒與危險(xiǎn)的環(huán)境中。1 、The altitude does not exceed 1000m.2、The ambient air temperatrue : Max:+40oC. Min:-10oC.3、The relatire humidity of air not bigger 90% (temperature:25oC) 4、The working situation have no conductivity dust.5、The working situation have no corrosive gas of effect insulation anddestroy metal. 6、The working situation without violent vibration and striking.7、The working situation have no explosive danger and fire.?