国产精品不卡一区二区_中文字幕人妻熟人妻熟丝袜美_里番本子库绅士ACG全彩无码_最近中文字幕MV在线资源

產品列表PRODUCTS LIST

首頁 > 技術與支持 > 您的耐壓測試儀安全嗎?電氣安規測試的十個為什么?

您的耐壓測試儀安全嗎?電氣安規測試的十個為什么?

點擊次數:1046 更新時間:2021-09-23

1、耐壓(ya)測試的(de)電壓(ya)要設(she)置(zhi)多少? 為何耐壓(ya)測試的(de)電壓(ya)比工作電壓(ya)高那么(me)多?

  2、為何有三種(zhong)測試波形?

  3、測試時間要設定多久?

  4、耐壓儀器的(de)容量如何選擇?

  5、絕緣體(ti)及絕緣崩潰的定義?

  6、按照絕(jue)緣崩潰的(de)定(ding)義,如何避免誤判?

  7、發現電弧ARC、閃絡(Flashover)是否意味絕緣已崩潰?

  8、絕緣電阻與耐壓的測試順序,通過絕緣電阻測試后可以不測耐壓嗎?

  9、高壓的(de)耐壓測(ce)試是(shi)否(fou)會(hui)損壞電路中(zhong)昂貴的(de)芯片?

  10、接地與導通性量測的差別?

 

  除了這十個(ge)常見的(de)(de)問題外,因為高(gao)壓(ya)儀器(qi)(用于絕(jue)緣電阻(zu)量測或(huo)耐壓(ya)測試的(de)(de)儀器(qi))的(de)(de)安(an)(an)全(quan)隱患,所(suo)以(yi)IEC制(zhi)定了對于高(gao)壓(ya)儀器(qi)的(de)(de)新(xin)規(gui)范IEC-61010-2-034來(lai)確保工程師使用儀器(qi)的(de)(de)安(an)(an)全(quan),本文也將(jiang)探討這些安(an)(an)全(quan)隱患以(yi)及儀器(qi)廠(chang)商的(de)(de)因應(ying)對策,讓您在分析絕(jue)緣材料(liao)或(huo)產測時得以(yi)安(an)(an)全(quan)地完(wan)成(cheng)測試任務,最(zui)后我們將(jiang)從(cong)研發到(dao)產測的(de)(de)測試計劃及設備選(xuan)購提供(gong)有效的(de)(de)建議。

  七、發現電弧ARC、閃絡(Flashover)是否意味絕緣已崩潰?

  UL/IEC 60950-1章節5.2.2對于絕緣崩(beng)潰的原(yuan)文還有(you)一段關于ARC與Flashover的敘述,原(yuan)文如下(xia):Corona discharge or a single momentary flashover is not regarded as insulation breakdown. 電(dian)暈放電(dian)(Corona Discharge)與單一瞬間(jian)的閃絡(luo)(Flashover)并(bing)不(bu)會被(bei)認定為絕緣崩(beng)潰。

  各位一(yi)定要(yao)有正確的觀(guan)念,ARC的測試其實是(shi)一(yi)種行(xing)業標準,并非國際法規,偵(zhen)測到ARC與絕緣崩潰是(shi)兩回(hui)事。

  過(guo)去的(de)(de)(de)(de)耐壓(ya)機無法顯示V-I特(te)性曲線來判斷絕緣(yuan)崩(beng)(beng)潰時,傳(chuan)統的(de)(de)(de)(de)做法是(shi)(shi)(shi)(shi)看(kan)與(yu)聽,看(kan)看(kan)有(you)(you)(you)沒有(you)(you)(you)電(dian)(dian)(dian)(dian)(dian)弧(hu)(hu)(hu)發生(sheng)(sheng)(sheng)(sheng),認(ren)為(wei)絕緣(yuan)損壞與(yu)電(dian)(dian)(dian)(dian)(dian)弧(hu)(hu)(hu)為(wei)因果關系,由于(yu)室(shi)內(nei)的(de)(de)(de)(de)采光與(yu)照(zhao)明會(hui)影響電(dian)(dian)(dian)(dian)(dian)弧(hu)(hu)(hu)的(de)(de)(de)(de)觀測,甚(shen)至(zhi)會(hui)特(te)別打造(zao)一(yi)(yi)間暗(an)室(shi)來觀察電(dian)(dian)(dian)(dian)(dian)弧(hu)(hu)(hu);或(huo)是(shi)(shi)(shi)(shi)聽聽看(kan)有(you)(you)(you)沒有(you)(you)(you)電(dian)(dian)(dian)(dian)(dian)弧(hu)(hu)(hu)吱吱的(de)(de)(de)(de)聲(sheng)響,有(you)(you)(you)些(xie)電(dian)(dian)(dian)(dian)(dian)弧(hu)(hu)(hu)的(de)(de)(de)(de)聲(sheng)響發生(sheng)(sheng)(sheng)(sheng)在(zai)人(ren)(ren)耳(er)聽不到的(de)(de)(de)(de)超音(yin)波頻段,還(huan)會(hui)買一(yi)(yi)個超音(yin)波轉(zhuan)換器,將(jiang)它轉(zhuan)為(wei)人(ren)(ren)耳(er)聽得到的(de)(de)(de)(de)音(yin)頻。但從(cong)標準的(de)(de)(de)(de)定義(yi)得知電(dian)(dian)(dian)(dian)(dian)弧(hu)(hu)(hu)與(yu)絕緣(yuan)崩(beng)(beng)潰是(shi)(shi)(shi)(shi)兩件事,我(wo)們應該思考為(wei)何會(hui)產(chan)(chan)生(sheng)(sheng)(sheng)(sheng)電(dian)(dian)(dian)(dian)(dian)弧(hu)(hu)(hu)以(yi)(yi)及電(dian)(dian)(dian)(dian)(dian)弧(hu)(hu)(hu)可(ke)(ke)能(neng)造(zao)成(cheng)(cheng)的(de)(de)(de)(de)危(wei)害,電(dian)(dian)(dian)(dian)(dian)弧(hu)(hu)(hu)的(de)(de)(de)(de)產(chan)(chan)生(sheng)(sheng)(sheng)(sheng)是(shi)(shi)(shi)(shi)電(dian)(dian)(dian)(dian)(dian)壓(ya)與(yu)距(ju)離的(de)(de)(de)(de)關系,以(yi)(yi)生(sheng)(sheng)(sheng)(sheng)活應用(yong)(yong)為(wei)例,打火(huo)機上的(de)(de)(de)(de)壓(ya)電(dian)(dian)(dian)(dian)(dian)材料(liao),透(tou)過(guo)壓(ya)力(li)產(chan)(chan)生(sheng)(sheng)(sheng)(sheng)電(dian)(dian)(dian)(dian)(dian)壓(ya)進而(er)產(chan)(chan)生(sheng)(sheng)(sheng)(sheng)電(dian)(dian)(dian)(dian)(dian)弧(hu)(hu)(hu)來點(dian)燃瓦斯,從(cong)這個例子可(ke)(ke)以(yi)(yi)得知,電(dian)(dian)(dian)(dian)(dian)弧(hu)(hu)(hu)可(ke)(ke)能(neng)造(zao)成(cheng)(cheng)的(de)(de)(de)(de)危(wei)害是(shi)(shi)(shi)(shi)用(yong)(yong)電(dian)(dian)(dian)(dian)(dian)設(she)施(shi)附近是(shi)(shi)(shi)(shi)否有(you)(you)(you)可(ke)(ke)燃性氣體(ti)或(huo)粉塵而(er)導致(zhi)火(huo)災或(huo)塵爆。第二個危(wei)害是(shi)(shi)(shi)(shi)高溫(wen)(wen),例如:工(gong)業用(yong)(yong)的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)焊(han)機,便是(shi)(shi)(shi)(shi)特(te)意(yi)透(tou)過(guo)高壓(ya)產(chan)(chan)生(sheng)(sheng)(sheng)(sheng)電(dian)(dian)(dian)(dian)(dian)弧(hu)(hu)(hu),以(yi)(yi)便應用(yong)(yong)它的(de)(de)(de)(de)高溫(wen)(wen)特(te)性來切割堅硬的(de)(de)(de)(de)金屬,此應用(yong)(yong)的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)弧(hu)(hu)(hu)最高溫(wen)(wen)度是(shi)(shi)(shi)(shi)太陽表面溫(wen)(wen)度的(de)(de)(de)(de)四倍(攝氏2萬度),電(dian)(dian)(dian)(dian)(dian)弧(hu)(hu)(hu)閃光產(chan)(chan)生(sheng)(sheng)(sheng)(sheng)的(de)(de)(de)(de)弧(hu)(hu)(hu)光能(neng)量(liang)(liang)單(dan)位(wei)一(yi)(yi)般以(yi)(yi)cal/cm2 或(huo)J/cm2 表示,Cal/cm2 (每(mei)平方公分卡路(lu)里)系指一(yi)(yi)單(dan)位(wei)面積上的(de)(de)(de)(de)總能(neng)量(liang)(liang),它是(shi)(shi)(shi)(shi)作為(wei)電(dian)(dian)(dian)(dian)(dian)弧(hu)(hu)(hu)量(liang)(liang)級的(de)(de)(de)(de)單(dan)位(wei),1 cal/cm2的(de)(de)(de)(de)能(neng)量(liang)(liang),相當(dang)于(yu)一(yi)(yi)個點(dian)燃的(de)(de)(de)(de)煙頭在(zai)指尖(jian)上1秒鐘。只要1-2 cal/cm2,就會(hui)使(shi)人(ren)(ren)的(de)(de)(de)(de)皮膚造(zao)成(cheng)(cheng)二級灼傷。

  八、絕緣電阻與耐壓的測試順序,通過絕緣電阻測試后可以不測耐壓嗎?

  許多(duo)的標準要(yao)求測(ce)試(shi)的順序為絕(jue)(jue)(jue)緣(yuan)電阻(zu)(IR)+耐(nai)壓(ya)(ya)(ACW或DCW)+絕(jue)(jue)(jue)緣(yuan)電阻(zu)(IR),首(shou)先要(yao)思(si)考的是絕(jue)(jue)(jue)緣(yuan)電阻(zu)為什(shen)么要(yao)測(ce)兩次?再者是如果(guo)絕(jue)(jue)(jue)緣(yuan)電阻(zu)很(hen)高,是不是就意味(wei)著(zhu)絕(jue)(jue)(jue)緣(yuan)沒有問題,所以就不用測(ce)耐(nai)壓(ya)(ya)?

  絕緣電阻是以一般的工作電壓去量測(非破壞測試),耐壓測試則是以高過數倍工作電壓的方式去量測泄漏電流(破壞性測試)。接下來量到很高的絕緣電阻時千萬不要高興得太早