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防雷装置由什么组成

防(fang)雷(lei)(lei)装置(zhi)的一般(ban)要求:常用的防(fang)雷(lei)(lei)装置(zhi)有避(bi)雷(lei)(lei)计(ji)、避(bi)雷(lei)(lei)线、避(bi)雷(lei)(lei)网、避(bi)雷(lei)(lei)带、避(bi)雷(lei)(lei)器等。防(fang)雷(lei)(lei)装置(zhi)主(zhu)要有接(jie)闪(shan)器、引(yin)下(xia)线和接(jie)地体(ti)三部分组(zu)成,其作用是防(fang)止直接(jie)雷(lei)(lei)击(ji)或将雷(lei)(lei)电(dian)流引(yin)入大地,以(yi)保证人(ren)身 及建(构)筑物。


其他避雷装置(zhi)?


(1)阀式避雷(lei)器


阀(fa)(fa)式避雷(lei)器由火(huo)花间(jian)(jian)(jian)(jian)隙(xi)和阀(fa)(fa)片(pian)(pian)(pian)串联组成(cheng)(cheng),装在(zai)密(mi)封的(de)(de)瓷套管内(nei)。火(huo)花间(jian)(jian)(jian)(jian)隙(xi)由铜片(pian)(pian)(pian)冲制(zhi)而成(cheng)(cheng),正常(chang)情况下(xia),火(huo)花间(jian)(jian)(jian)(jian)隙(xi)可(ke)阻(zu)止线(xian)路(lu)(lu)(lu)上(shang)的(de)(de)工(gong)频电(dian)(dian)(dian)(dian)流通过(guo)(guo)(guo),在(zai)雷(lei)电(dian)(dian)(dian)(dian)过(guo)(guo)(guo)电(dian)(dian)(dian)(dian)压(ya)(ya)(ya)(ya)作用(yong)下(xia),火(huo)花间(jian)(jian)(jian)(jian)隙(xi)被击穿(chuan)放电(dian)(dian)(dian)(dian)。阀(fa)(fa)片(pian)(pian)(pian)是(shi)用(yong)陶(tao)料粘固起来的(de)(de)电(dian)(dian)(dian)(dian)工(gong)用(yong)金刚砂(sha)颗(ke)粒组成(cheng)(cheng)的(de)(de),具有(you)非线(xian)性特(te)性。正常(chang)电(dian)(dian)(dian)(dian)压(ya)(ya)(ya)(ya)时,阀(fa)(fa)片(pian)(pian)(pian)电(dian)(dian)(dian)(dian)阻(zu)很(hen)大;过(guo)(guo)(guo)电(dian)(dian)(dian)(dian)压(ya)(ya)(ya)(ya)时,阀(fa)(fa)片(pian)(pian)(pian)电(dian)(dian)(dian)(dian)阻(zu)很(hen)小。因此,当(dang)线(xian)路(lu)(lu)(lu)上(shang)出现过(guo)(guo)(guo)电(dian)(dian)(dian)(dian)压(ya)(ya)(ya)(ya)时,火(huo)花间(jian)(jian)(jian)(jian)隙(xi)被击穿(chuan),阀(fa)(fa)片(pian)(pian)(pian)能(neng)使(shi)雷(lei)电(dian)(dian)(dian)(dian)流顺畅(chang)地向大地泄放。当(dang)过(guo)(guo)(guo)电(dian)(dian)(dian)(dian)压(ya)(ya)(ya)(ya)消失后(hou),线(xian)路(lu)(lu)(lu)上(shang)恢(hui)复(fu)工(gong)频电(dian)(dian)(dian)(dian)压(ya)(ya)(ya)(ya)时,阀(fa)(fa)片(pian)(pian)(pian)则(ze)呈现很(hen)大的(de)(de)电(dian)(dian)(dian)(dian)阻(zu),使(shi)火(huo)花间(jian)(jian)(jian)(jian)隙(xi)绝(jue)缘迅速恢(hui)复(fu)而切断工(gong)频续流,从(cong)而保(bao)护(hu)线(xian)路(lu)(lu)(lu)恢(hui)复(fu)正常(chang)运行。需(xu)要(yao)说明的(de)(de)是(shi):当(dang)雷(lei)电(dian)(dian)(dian)(dian)流流过(guo)(guo)(guo)阀(fa)(fa)片(pian)(pian)(pian)电(dian)(dian)(dian)(dian)阻(zu)时要(yao)形成(cheng)(cheng)电(dian)(dian)(dian)(dian)压(ya)(ya)(ya)(ya)降(jiang),这(zhei)就是(shi)残(can)余的(de)(de)过(guo)(guo)(guo)电(dian)(dian)(dian)(dian)压(ya)(ya)(ya)(ya),称为残(can)压(ya)(ya)(ya)(ya)。残(can)压(ya)(ya)(ya)(ya)要(yao)加在(zai)被保(bao)护(hu)设备上(shang),因此残(can)压(ya)(ya)(ya)(ya)不能(neng)超(chao)过(guo)(guo)(guo)设备绝(jue)缘允许的(de)(de)耐压(ya)(ya)(ya)(ya)值,否则(ze)可(ke)能(neng)击穿(chuan)设备绝(jue)缘。变配电(dian)(dian)(dian)(dian)所内(nei)一般(ban)采用(yong)这(zhei)种避雷(lei)器。


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