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      1. 接線端子國(guó)家標(biāo)準(zhǔn)

        2013/12/19 8:29:39      點(diǎn)擊:

        序號(hào) 標(biāo)準(zhǔn)號(hào) 標(biāo)準(zhǔn)名稱 批準(zhǔn)或發(fā)布日期 實(shí)施日期
        新標(biāo)準(zhǔn) 老標(biāo)準(zhǔn) 新標(biāo)準(zhǔn) 老標(biāo)準(zhǔn)
        1 GB/T14048.1 低壓開關(guān)設(shè)備和控制設(shè)備 總則 2000-10-17 1993-01-04 2001-07-01 1993-07-01
        2 GB14048.2 低壓斷路器 2001-11-21 1994-04-12 2002-11-01 1994-12-01
        3 GB14048.3 開關(guān)、隔離器、隔離開關(guān)及熔斷器組合電器2002-06-13 1993-09-05 2003-01-01 1994-04-01
        4 GB14048.4 機(jī)電式接觸器和電動(dòng)機(jī)起動(dòng)器 2003-09-10 1993-09-05 2004-05-01 1994-04-01
        5 GB14048.5 控制電路電器和開關(guān)元件 2001-11-02 1993-09-05 2002-06-01 1994-04-01
        上述5份新標(biāo)準(zhǔn),等效采用IEC60947.1~5的同名標(biāo)準(zhǔn)?紤]到我國(guó)的實(shí)際環(huán)境條件,在GB14048.1-2000附錄K中增加了恒定濕熱和交變濕熱二種耐濕性能要求和試驗(yàn)方法,并要求產(chǎn)品標(biāo)準(zhǔn)應(yīng)根據(jù)自身特點(diǎn)選擇相應(yīng)的耐濕性能的考核方法。
        2. 新老標(biāo)準(zhǔn)的主要差異
        2.1 主要共同差異
        上述5份新老國(guó)家標(biāo)準(zhǔn)的主要共同差異有:
        a.新標(biāo)準(zhǔn)取消了老標(biāo)準(zhǔn)中的一些結(jié)構(gòu)和材料性能方面的要求。如耐振動(dòng)、耐沖擊、耐撞擊、彈性部件耐老化、耐低溫和(高溫)性能、耐熱性能、抗銹性等。
        b.新標(biāo)準(zhǔn)的電磁兼容性包括抗干擾度(浪涌抗擾度、電快速瞬變/脈沖群抗擾度、射頻電磁場(chǎng)輻射抗擾度和靜電放電抗擾度)和發(fā)射(輻射和傳導(dǎo))。而老標(biāo)準(zhǔn)只有抗電磁干擾(抗高頻傳導(dǎo)干擾、抗高頻輻射干擾、抗低頻傳導(dǎo)干擾和抗浪涌過(guò)電壓傳導(dǎo)干擾)的要求。
        c.新老標(biāo)準(zhǔn)主電路的工頻介電試驗(yàn)電壓值的差異見表2。
        表2 主電路的工頻介電試驗(yàn)電壓值的差異
        額定絕緣電壓Ui
        (V) 工頻介電試驗(yàn)電壓值
        (有效值)(V)
        Ui≤60 1000
        60<Ui≤300 2000
        300<Ui≤690(老標(biāo)準(zhǔn)660) 2500
        690(老標(biāo)準(zhǔn)660)<Ui≤800 3000
        800<Ui≤1000 3500
        1000<Ui≤1500(僅用于DC) 3500(老標(biāo)準(zhǔn)4200)
        d.新標(biāo)準(zhǔn)中對(duì)型式試驗(yàn)的試品數(shù)量未作明確規(guī)定,而老標(biāo)準(zhǔn)中規(guī)定每項(xiàng)試驗(yàn)至少為2臺(tái)。
        e.新標(biāo)準(zhǔn)中刪去了老標(biāo)準(zhǔn)中的定期試驗(yàn)。
        f.新標(biāo)準(zhǔn)中將壽命試驗(yàn)(機(jī)械壽命和電壽命試驗(yàn))列為特殊試驗(yàn)項(xiàng)目,老標(biāo)準(zhǔn)中壽命試驗(yàn)為型式試驗(yàn)項(xiàng)目。
        g.新標(biāo)準(zhǔn)中刪去老標(biāo)準(zhǔn)中的運(yùn)輸、貯存等試驗(yàn)。

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