72DIR3T
72DIR3T
72DIR3T變壓器出現(xiàn)異常的處理方法:
a)正常運(yùn)行時(shí)牽引變壓器是均勻的嗡嗡聲,觀察儀表過(guò)負(fù)荷過(guò)電壓狀況,確屬過(guò)電壓或過(guò)負(fù)荷,視過(guò)負(fù)荷情況按廠家或規(guī)程規(guī)定過(guò)負(fù)荷允許時(shí)間運(yùn)行,同時(shí)檢查油溫冷確裝置是否正常?;蛘呦螂娬{(diào)申請(qǐng)降負(fù)荷。但仍是嗡嗡聲,只是比原來(lái)的大,無(wú)雜音。但也可能隨負(fù)荷的急劇變化,呈現(xiàn)“割割割,割割割”突擊的間隙響聲。聲音隨變壓器的儀表(電壓表,電流表)指針同時(shí)動(dòng)作。
b)夾緊鐵芯的螺釘松動(dòng)引起,這種原因造成的異音呈現(xiàn)非常驚人的“錘擊”和“刮大風(fēng)”之聲。如“丁丁當(dāng)當(dāng)”和“呼……呼……之音。但指示儀表均正常,油色,油溫,油位均正常。
c)變壓器外殼與其他物體撞擊引起的。這是因?yàn)闋恳儔浩鲀?nèi)部鐵芯的振動(dòng)引起其他部件的振動(dòng),使接觸相互撞擊。如變壓器上裝控制線的軟管與外殼或散熱器撞擊,呈現(xiàn)“沙沙沙”的聲音,有連續(xù)較長(zhǎng),間隙的特點(diǎn),變壓器各部不會(huì)呈現(xiàn)異?,F(xiàn)象。這時(shí)可尋找聲源,在罪響的側(cè)用手或木棒按住再聽(tīng)聲音有何變化,以判別之
d)外界氣候影響造成的放電聲。如大霧天,雪天,雪天造成套管處電暈放電或輝光放電,呈現(xiàn)“嘶嘶”,“嗤嗤”之聲,夜間可見(jiàn)藍(lán)色小火花。
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