LED灯相对与(yu)其他灯具(ju)有(you)(you)些特殊，必须通过特定的(de)(de)(de)(de)驱动(dong)电(dian)(dian)(dian)路才能正常运(yun)行，而这(zhei)种驱动(dong)电(dian)(dian)(dian)路的(de)(de)(de)(de)要(yao)求(qiu)也(ye)很高(gao)，这(zhei)也(ye)是为什(shen)么选择高(gao)压(ya)(ya)贴(tie)片电(dian)(dian)(dian)容(rong)主要(yao)原因。高(gao)压(ya)(ya)贴(tie)片电(dian)(dian)(dian)容(rong)以(yi)其高(gao)耐压(ya)(ya)著称(cheng)，而且在(zai)(zai)(zai)稳定性(xing)方(fang)面(mian)非(fei)常出(chu)色，可以(yi)避免在(zai)(zai)(zai)连续工作(zuo)下(xia)及(ji)温(wen)(wen)度(du)(du)升高(gao)而使LED系(xi)统受...护(hu)(hu)眼(yan)仪的(de)(de)(de)(de)作(zuo)用(yong)(yong)—护(hu)(hu)眼(yan)仪的(de)(de)(de)(de)作(zuo)用(yong)(yong)及(ji)作(zuo)用(yong)(yong)原理来(lai)源(yuan)：供需(xu)(xu)及(ji)二手(shou)交(jiao)易查(cha)看(kan)：695回复：0我(wo)们的(de)(de)(de)(de)眼(yan)睛在(zai)(zai)(zai)长时间的(de)(de)(de)(de)看(kan)书，用(yong)(yong)电(dian)(dian)(dian)脑，看(kan)手(shou)机(ji)之后，会(hui)(hui)变得非(fei)常疲劳。现在(zai)(zai)(zai)，社会(hui)(hui)上的(de)(de)(de)(de)近视(shi)远视(shi)眼(yan)越来(lai)越多，眼(yan)睛的(de)(de)(de)(de)按(an)摩保护(hu)(hu)工程刻不容(rong)缓。护(hu)(hu)眼(yan)仪的(de)(de)(de)(de)出(chu)现给(ji)我(wo)们带(dai)来(lai)了福音(yin)。在(zai)(zai)(zai)带(dai)上护(hu)(hu)眼(yan)仪后，护(hu)(hu)眼(yan)仪的(de)(de)(de)(de)按(an)摩作(zuo)用(yong)(yong)会(hui)(hui)促进我(wo)们眼(yan)部(bu)的(de)(de)(de)(de)血(xue)液循环，对我(wo)们眼(yan)睛很有(you)(you)好处。护(hu)(hu)眼(yan)仪的(de)(de)(de)(de)作(zuo)用(yong)(yong)—适用(yong)(yong)功能根据眼(yan)部(bu)的(de)(de)(de)(de)高(gao)低(di)轮(lun)廓(kuo)与(yu)不同的(de)(de)(de)(de)穴位分(fen)布精心设计而成(cheng)，有(you)(you)26个手(shou)指头(tou)状按(an)摩触头(tou)，并镶入(ru)高(gao)效医用(yong)(yong)稀土永磁合金钕铁(tie)硼，可产生比较好磁通量。、目赤肿痛(tong)，视(shi)物不清、角膜白斑，角膜炎、面(mian)神经(jing)麻痹(bi)、眼(yan)肌(ji)麻痹(bi)、偏、通络明目、屈光(guang)不正、视(shi)神经(jing)萎缩、疏风清流(liu)、滋(zi)水(shui)明...温(wen)(wen)度(du)(du)与(yu)机(ji)械作(zuo)用(yong)(yong)对高(gao)压(ya)(ya)电(dian)(dian)(dian)容(rong)的(de)(de)(de)(de)影(ying)响来(lai)源(yuan)：供需(xu)(xu)及(ji)二手(shou)交(jiao)易查(cha)看(kan)：400回复：0温(wen)(wen)度(du)(du)与(yu)机(ji)械作(zuo)用(yong)(yong)多高(gao)压(ya)(ya)电(dian)(dian)(dian)容(rong)有(you)(you)什(shen)么影(ying)响呢，一(yi)起进入(ru)本(ben)文(wen)的(de)(de)(de)(de)主题，了解一(yi)下(xia)这(zhei)两者(zhe)对高(gao)压(ya)(ya)电(dian)(dian)(dian)容(rong)带(dai)来(lai)的(de)(de)(de)(de)影(ying)响。熔断器主要(yao)由熔体、外壳和(he)支(zhi)座3部(bu)分(fen)组成(cheng)，其中熔体是控(kong)制(zhi)熔断特性(xing)的(de)(de)(de)(de)关(guan)键元件(jian)。湖南电(dian)(dian)(dian)力(li)熔断器

自(zi)(zi)(zi)锁运行：自(zi)(zi)(zi)复(fu)保(bao)(bao)(bao)(bao)险(xian)(xian)(xian)丝(si)(si)在(zai)过流(liu)(liu)(liu)(liu)(liu)(liu)保(bao)(bao)(bao)(bao)护状态(tai)，以极小的(de)(de)(de)(de)(de)(de)电(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)(liu)锁定在(zai)高(gao)阻状态(tai)，只有(you)(you)切(qie)断(duan)(duan)电(dian)(dian)(dian)(dian)(dian)源(yuan)或过电(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)(liu)消失后，才会恢复(fu)低(di)阻状态(tai)。自(zi)(zi)(zi)动复(fu)位(wei)：自(zi)(zi)(zi)复(fu)保(bao)(bao)(bao)(bao)险(xian)(xian)(xian)丝(si)(si)在(zai)起到(dao)过流(liu)(liu)(liu)(liu)(liu)(liu)保(bao)(bao)(bao)(bao)护作用(yong)(yong)(yong)后（故障排除）自(zi)(zi)(zi)行复(fu)位(wei)，无需进行拆换。耐大(da)电(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)(liu)：自(zi)(zi)(zi)复(fu)保(bao)(bao)(bao)(bao)险(xian)(xian)(xian)丝(si)(si)有(you)(you)极好的(de)(de)(de)(de)(de)(de)耐大(da)电(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)(liu)能(neng)(neng)力，有(you)(you)的(de)(de)(de)(de)(de)(de)规格可(ke)(ke)承受(shou)100A电(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)(liu)冲(chong)击(ji)。应(ying)用(yong)(yong)(yong)：PPTC的(de)(de)(de)(de)(de)(de)应(ying)用(yong)(yong)(yong)范围(wei)很广，可(ke)(ke)以用(yong)(yong)(yong)在(zai)各种(zhong)电(dian)(dian)(dian)(dian)(dian)子产(chan)品(pin)、通讯产(chan)品(pin)、电(dian)(dian)(dian)(dian)(dian)源(yuan)供(gong)应(ying)器(qi)(qi)等。保(bao)(bao)(bao)(bao)险(xian)(xian)(xian)丝(si)(si)相关说明编辑1.正常(chang)工作电(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)(liu)在(zai)25℃条件下运行，保(bao)(bao)(bao)(bao)险(xian)(xian)(xian)丝(si)(si)的(de)(de)(de)(de)(de)(de)电(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)(liu)额(e)定值(zhi)通常(chang)要(yao)减少25%以避免有(you)(you)害熔(rong)断(duan)(duan)。大(da)多数传(chuan)统的(de)(de)(de)(de)(de)(de)保(bao)(bao)(bao)(bao)险(xian)(xian)(xian)丝(si)(si)其采用(yong)(yong)(yong)的(de)(de)(de)(de)(de)(de)材(cai)料具有(you)(you)较低(di)的(de)(de)(de)(de)(de)(de)熔(rong)化(hua)温度(du)(du)。因此，该(gai)种(zhong)保(bao)(bao)(bao)(bao)险(xian)(xian)(xian)丝(si)(si)对(dui)环(huan)境温度(du)(du)的(de)(de)(de)(de)(de)(de)变化(hua)比较敏感(gan)。例如一个(ge)电(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)(liu)额(e)定值(zhi)为10A的(de)(de)(de)(de)(de)(de)保(bao)(bao)(bao)(bao)险(xian)(xian)(xian)丝(si)(si)通常(chang)不推荐在(zai)25℃环(huan)境温度(du)(du)下在(zai)大(da)于。汽车保(bao)(bao)(bao)(bao)险(xian)(xian)(xian)丝(si)(si)2．电(dian)(dian)(dian)(dian)(dian)压额(e)定值(zhi)保(bao)(bao)(bao)(bao)险(xian)(xian)(xian)丝(si)(si)的(de)(de)(de)(de)(de)(de)电(dian)(dian)(dian)(dian)(dian)压额(e)定值(zhi)必(bi)须等于或大(da)于有(you)(you)效的(de)(de)(de)(de)(de)(de)电(dian)(dian)(dian)(dian)(dian)路(lu)电(dian)(dian)(dian)(dian)(dian)压。一般(ban)标准电(dian)(dian)(dian)(dian)(dian)压额(e)定值(zhi)系列为32V、125V、250V、600V。3．电(dian)(dian)(dian)(dian)(dian)阻保(bao)(bao)(bao)(bao)险(xian)(xian)(xian)丝(si)(si)的(de)(de)(de)(de)(de)(de)电(dian)(dian)(dian)(dian)(dian)阻在(zai)整个(ge)电(dian)(dian)(dian)(dian)(dian)路(lu)中并不重(zhong)要(yao)。由(you)于安培数小于1的(de)(de)(de)(de)(de)(de)保(bao)(bao)(bao)(bao)险(xian)(xian)(xian)丝(si)(si)电(dian)(dian)(dian)(dian)(dian)阻只有(you)(you)几(ji)个(ge)欧姆，所(suo)以在(zai)低(di)压电(dian)(dian)(dian)(dian)(dian)路(lu)中采用(yong)(yong)(yong)保(bao)(bao)(bao)(bao)险(xian)(xian)(xian)丝(si)(si)时(shi)应(ying)考虑这(zhei)个(ge)问题。大(da)部(bu)分的(de)(de)(de)(de)(de)(de)保(bao)(bao)(bao)(bao)险(xian)(xian)(xian)丝(si)(si)是用(yong)(yong)(yong)温度(du)(du)系数为正的(de)(de)(de)(de)(de)(de)材(cai)料制造(zao)的(de)(de)(de)(de)(de)(de)，因此，就有(you)(you)冷电(dian)(dian)(dian)(dian)(dian)阻和热电(dian)(dian)(dian)(dian)(dian)阻之分。4．环(huan)境温度(du)(du)保(bao)(bao)(bao)(bao)险(xian)(xian)(xian)丝(si)(si)的(de)(de)(de)(de)(de)(de)电(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)(liu)承载能(neng)(neng)力。其实验是在(zai)25℃环(huan)境温度(du)(du)条件下进行的(de)(de)(de)(de)(de)(de)。这(zhei)种(zhong)实验受(shou)环(huan)境温度(du)(du)变化(hua)的(de)(de)(de)(de)(de)(de)影响。湖南电(dian)(dian)(dian)(dian)(dian)力熔(rong)断(duan)(duan)器(qi)(qi)常(chang)用(yong)(yong)(yong)的(de)(de)(de)(de)(de)(de)熔(rong)断(duan)(duan)器(qi)(qi)有(you)(you)管式(shi)(shi)熔(rong)断(duan)(duan)器(qi)(qi)R1系列、螺旋式(shi)(shi)熔(rong)断(duan)(duan)器(qi)(qi)RLl系列、填(tian)料封闭式(shi)(shi)熔(rong)断(duan)(duan)器(qi)(qi)RT0系列及快速熔(rong)断(duan)(duan)器(qi)(qi)RSO。

户(hu)(hu)内式(shi)(shi)高(gao)压(ya)(ya)(ya)熔(rong)(rong)(rong)(rong)(rong)断(duan)(duan)(duan)器(qi)(qi)户(hu)(hu)内高(gao)压(ya)(ya)(ya)熔(rong)(rong)(rong)(rong)(rong)断(duan)(duan)(duan)器(qi)(qi)全部是(shi)限流(liu)型熔(rong)(rong)(rong)(rong)(rong)断(duan)(duan)(duan)器(qi)(qi)，其主要(yao)部分(fen)(fen)为熔(rong)(rong)(rong)(rong)(rong)管和(he)熔(rong)(rong)(rong)(rong)(rong)体，熔(rong)(rong)(rong)(rong)(rong)管内配置有(you)瓷(ci)柱(zhu)，瓷(ci)柱(zhu)上等间(jian)距绕有(you)熔(rong)(rong)(rong)(rong)(rong)体，熔(rong)(rong)(rong)(rong)(rong)管的(de)(de)(de)两端(duan)配置有(you)压(ya)(ya)(ya)帽，其间(jian)填充有(you)石英砂以RN1型为典型**的(de)(de)(de)设计(ji)序(xu)号为奇数系(xi)列(lie)的(de)(de)(de)熔(rong)(rong)(rong)(rong)(rong)断(duan)(duan)(duan)器(qi)(qi)，用(yong)(yong)(yong)(yong)于(yu)3～35kV的(de)(de)(de)电(dian)(dian)(dian)力线路(lu)和(he)电(dian)(dian)(dian)气(qi)设备的(de)(de)(de)过(guo)载(zai)和(he)短(duan)路(lu)保(bao)护(hu)；以RN2型为**的(de)(de)(de)设计(ji)序(xu)号为偶(ou)数系(xi)列(lie)的(de)(de)(de)熔(rong)(rong)(rong)(rong)(rong)断(duan)(duan)(duan)器(qi)(qi)，电(dian)(dian)(dian)压(ya)(ya)(ya)互(hu)感(gan)器(qi)(qi)专门用(yong)(yong)(yong)(yong)来保(bao)护(hu)电(dian)(dian)(dian)压(ya)(ya)(ya)互(hu)感(gan)器(qi)(qi)从3到35kV，适用(yong)(yong)(yong)(yong)于(yu)高(gao)压(ya)(ya)(ya)电(dian)(dian)(dian)压(ya)(ya)(ya)互(hu)感(gan)器(qi)(qi)的(de)(de)(de)过(guo)载(zai)和(he)短(duan)路(lu)保(bao)护(hu)。户(hu)(hu)外(wai)式(shi)(shi)高(gao)压(ya)(ya)(ya)熔(rong)(rong)(rong)(rong)(rong)断(duan)(duan)(duan)器(qi)(qi)1.户(hu)(hu)外(wai)跌落(luo)式(shi)(shi)高(gao)压(ya)(ya)(ya)熔(rong)(rong)(rong)(rong)(rong)断(duan)(duan)(duan)器(qi)(qi)跌落(luo)式(shi)(shi)熔(rong)(rong)(rong)(rong)(rong)断(duan)(duan)(duan)器(qi)(qi)主要(yao)由(you)熔(rong)(rong)(rong)(rong)(rong)丝(si)具(ju)(ju)、熔(rong)(rong)(rong)(rong)(rong)丝(si)管和(he)熔(rong)(rong)(rong)(rong)(rong)丝(si)元件三(san)部分(fen)(fen)构成。本(ben)(ben)实用(yong)(yong)(yong)(yong)新型具(ju)(ju)有(you)经济实用(yong)(yong)(yong)(yong)、操(cao)作方(fang)便、适应(ying)户(hu)(hu)外(wai)环境强的(de)(de)(de)优点，它(ta)被广泛(fan)应(ying)用(yong)(yong)(yong)(yong)于(yu)10kV架空配电(dian)(dian)(dian)线路(lu)和(he)用(yong)(yong)(yong)(yong)户(hu)(hu)进线的(de)(de)(de)分(fen)(fen)支(zhi)(zhi)线，与35kva以下容量的(de)(de)(de)配电(dian)(dian)(dian)变压(ya)(ya)(ya)器(qi)(qi)，一次侧和(he)电(dian)(dian)(dian)力电(dian)(dian)(dian)容器(qi)(qi)等设备的(de)(de)(de)过(guo)载(zai)或短(duan)路(lu)保(bao)护(hu)功能(neng)，并(bing)对系(xi)统、设备投资和(he)运行。2.户(hu)(hu)外(wai)支(zhi)(zhi)柱(zhu)式(shi)(shi)高(gao)压(ya)(ya)(ya)熔(rong)(rong)(rong)(rong)(rong)断(duan)(duan)(duan)器(qi)(qi)熔(rong)(rong)(rong)(rong)(rong)断(duan)(duan)(duan)器(qi)(qi)由(you)瓷(ci)套、熔(rong)(rong)(rong)(rong)(rong)管及(ji)棒形支(zhi)(zhi)持绝(jue)缘子和(he)接线端(duan)帽等组成。RXW－35型限流(liu)式(shi)(shi)熔(rong)(rong)(rong)(rong)(rong)断(duan)(duan)(duan)器(qi)(qi)主要(yao)用(yong)(yong)(yong)(yong)于(yu)保(bao)护(hu)电(dian)(dian)(dian)压(ya)(ya)(ya)互(hu)感(gan)器(qi)(qi)熔(rong)(rong)(rong)(rong)(rong)管装于(yu)瓷(ci)套中，熔(rong)(rong)(rong)(rong)(rong)化的(de)(de)(de)金属被放(fang)置在一个(ge)装满石英砂的(de)(de)(de)管子里。熔(rong)(rong)(rong)(rong)(rong)断(duan)(duan)(duan)器(qi)(qi)的(de)(de)(de)灭(mie)弧原(yuan)理(li)与RN系(xi)列(lie)限流(liu)式(shi)(shi)高(gao)压(ya)(ya)(ya)熔(rong)(rong)(rong)(rong)(rong)断(duan)(duan)(duan)器(qi)(qi)的(de)(de)(de)灭(mie)弧原(yuan)理(li)基本(ben)(ben)相(xiang)同，均有(you)限流(liu)作用(yong)(yong)(yong)(yong)。高(gao)压(ya)(ya)(ya)熔(rong)(rong)(rong)(rong)(rong)断(duan)(duan)(duan)器(qi)(qi)的(de)(de)(de)使(shi)用(yong)(yong)(yong)(yong)要(yao)点1.高(gao)压(ya)(ya)(ya)熔(rong)(rong)(rong)(rong)(rong)断(duan)(duan)(duan)器(qi)(qi)的(de)(de)(de)安装（1）安装前：检查外(wai)观是(shi)否(fou)完整良好(hao)。

使(shi)MAX668的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)输出(chu)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)(ya)一(yi)直高于MAX810的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)复(fu)位门槛电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)(ya)。假如(ru)R、C使(shi)Q1的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)导(dao)通(tong)时(shi)间延长，同时(shi)也(ye)(ye)延长了(le)关(guan)断(duan)时(shi)间。因(yin)此需要在电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)上(shang)并(bing)联一(yi)肖(xiao)特(te)基(ji)二极管，以加(jia)速当负载过(guo)载时(shi)关(guan)闭(bi)Q1的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)进程。为了(le)获得增强(qiang)型通(tong)道及(ji)较(jiao)低(di)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)导(dao)通(tong)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)，上(shang)述(shu)(shu)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)均需要采用逻辑(ji)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)平控制的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)P沟道MOSFET，如(ru)果Q1的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)导(dao)通(tong)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)值(zhi)较(jiao)大(da)且在其(qi)两端(duan)产生(sheng)较(jiao)大(da)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)压(ya)(ya)(ya)降（特(te)别是低(di)输出(chu)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)(ya)应用场合(he)或负载离电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)距离较(jiao)远时(shi)），则应该(gai)从Q1漏极端(duan)反(fan)馈(kui)(kui)(kui)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)(ya)调节(jie)输出(chu)。设计电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)时(shi)，必(bi)须**小化寄生(sheng)参(can)数同时(shi)仔细考虑电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)布局。利用一(yi)个SOT23封装的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)低(di)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)(ya)模(mo)(mo)拟开(kai)关(guan)（MAX4544）可实现上(shang)述(shu)(shu)远端(duan)调节(jie)，该(gai)开(kai)关(guan)受(shou)控于MAX810L的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)输出(chu)，如(ru)图(tu)4所示。根据MAX4544产品参(can)数，其(qi)**低(di)工(gong)作电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)(ya)为。由(you)于输入电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)(ya)为，而肖(xiao)特(te)基(ji)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)正向管压(ya)(ya)(ya)降为，因(yin)此即使(shi)该(gai)升压(ya)(ya)(ya)变换处于关(guan)闭(bi)模(mo)(mo)式，MAX4544（及(ji)MAX810）也(ye)(ye)处于工(gong)作状态。此时(shi)，MAX810输出(chu)高电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)平，MAX4544的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)公共端(duan)COM与(yu)其(qi)常开(kai)端(duan)NO（Q1的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)源极）相(xiang)(xiang)连。当MAX668使(shi)能时(shi)，与(yu)MAX4544公共端(duan)相(xiang)(xiang)连的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)网络为MAX668提供反(fan)馈(kui)(kui)(kui)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)(ya)。由(you)于5V电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)(ya)时(shi)MAX4544的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)导(dao)通(tong)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)**大(da)可达(da)60Ω。因(yin)此为了(le)得到**小输出(chu)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)(ya)误(wu)差(cha)(cha)，反(fan)馈(kui)(kui)(kui)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)取值(zhi)应该(gai)很大(da)。由(you)于3V工(gong)作电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)(ya)时(shi)，MAX4544的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)导(dao)通(tong)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)*为120Ω，因(yin)此开(kai)关(guan)MAX4544引入的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)误(wu)差(cha)(cha)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)(ya)很小。熔(rong)(rong)断(duan)器的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)熔(rong)(rong)体(ti)要按要求使(shi)用相(xiang)(xiang)配合(he)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)熔(rong)(rong)体(ti)，不允许(xu)随意加(jia)大(da)熔(rong)(rong)体(ti)或用其(qi)他导(dao)体(ti)代(dai)替熔(rong)(rong)体(ti)。

T是电(dian)(dian)流(liu)(liu)流(liu)(liu)过导体(ti)的(de)(de)(de)(de)(de)时(shi)(shi)(shi)间；依此公式我(wo)们不难看出(chu)保(bao)(bao)险(xian)(xian)(xian)丝(si)(si)的(de)(de)(de)(de)(de)简(jian)单(dan)的(de)(de)(de)(de)(de)工(gong)作(zuo)原理了。一(yi)(yi)种保(bao)(bao)险(xian)(xian)(xian)丝(si)(si)当(dang)制(zhi)作(zuo)保(bao)(bao)险(xian)(xian)(xian)丝(si)(si)的(de)(de)(de)(de)(de)材(cai)料及(ji)其(qi)(qi)(qi)形状确定(ding)了，其(qi)(qi)(qi)电(dian)(dian)阻R就(jiu)相对确定(ding)了（若(ruo)(ruo)不考虑它(ta)(ta)的(de)(de)(de)(de)(de)电(dian)(dian)阻温度系数）。当(dang)电(dian)(dian)流(liu)(liu)流(liu)(liu)过它(ta)(ta)时(shi)(shi)(shi)，它(ta)(ta)就(jiu)会(hui)发热(re)，随(sui)着时(shi)(shi)(shi)间的(de)(de)(de)(de)(de)增(zeng)加(jia)其(qi)(qi)(qi)发热(re)量也在(zai)增(zeng)加(jia)。电(dian)(dian)流(liu)(liu)与电(dian)(dian)阻的(de)(de)(de)(de)(de)大(da)(da)小确定(ding)了产(chan)生(sheng)(sheng)热(re)量的(de)(de)(de)(de)(de)速(su)度，保(bao)(bao)险(xian)(xian)(xian)丝(si)(si)的(de)(de)(de)(de)(de)构造与其(qi)(qi)(qi)安(an)装的(de)(de)(de)(de)(de)状况确定(ding)了热(re)量耗(hao)散的(de)(de)(de)(de)(de)速(su)度，若(ruo)(ruo)产(chan)生(sheng)(sheng)热(re)量的(de)(de)(de)(de)(de)速(su)度小于(yu)热(re)量耗(hao)散的(de)(de)(de)(de)(de)速(su)度时(shi)(shi)(shi)，保(bao)(bao)险(xian)(xian)(xian)丝(si)(si)是不会(hui)熔(rong)(rong)(rong)断(duan)(duan)(duan)的(de)(de)(de)(de)(de)。若(ruo)(ruo)产(chan)生(sheng)(sheng)热(re)量的(de)(de)(de)(de)(de)速(su)度等于(yu)热(re)量耗(hao)散的(de)(de)(de)(de)(de)速(su)度时(shi)(shi)(shi)，在(zai)相当(dang)长的(de)(de)(de)(de)(de)时(shi)(shi)(shi)间内它(ta)(ta)也不会(hui)熔(rong)(rong)(rong)断(duan)(duan)(duan)。若(ruo)(ruo)产(chan)生(sheng)(sheng)热(re)量的(de)(de)(de)(de)(de)速(su)度大(da)(da)于(yu)热(re)量耗(hao)散的(de)(de)(de)(de)(de)速(su)度时(shi)(shi)(shi)，那么产(chan)生(sheng)(sheng)的(de)(de)(de)(de)(de)热(re)量就(jiu)会(hui)越来越多(duo)。又因为它(ta)(ta)有一(yi)(yi)定(ding)比热(re)及(ji)质量，其(qi)(qi)(qi)热(re)量的(de)(de)(de)(de)(de)增(zeng)加(jia)就(jiu)表现在(zai)温度的(de)(de)(de)(de)(de)升(sheng)高(gao)上(shang)，当(dang)温度升(sheng)高(gao)到(dao)保(bao)(bao)险(xian)(xian)(xian)丝(si)(si)的(de)(de)(de)(de)(de)熔(rong)(rong)(rong)点以上(shang)时(shi)(shi)(shi)保(bao)(bao)险(xian)(xian)(xian)丝(si)(si)就(jiu)发生(sheng)(sheng)了熔(rong)(rong)(rong)断(duan)(duan)(duan)。这(zhei)(zhei)就(jiu)是保(bao)(bao)险(xian)(xian)(xian)丝(si)(si)的(de)(de)(de)(de)(de)工(gong)作(zuo)原理。我(wo)们从这(zhei)(zhei)个原理中应(ying)该知道，您在(zai)设计(ji)制(zhi)造保(bao)(bao)险(xian)(xian)(xian)丝(si)(si)时(shi)(shi)(shi)必须认真(zhen)地研究您所选材(cai)料的(de)(de)(de)(de)(de)物理特性，并(bing)确保(bao)(bao)它(ta)(ta)们有一(yi)(yi)致几何(he)尺寸。因为这(zhei)(zhei)些因素对保(bao)(bao)险(xian)(xian)(xian)丝(si)(si)能否正(zheng)常(chang)工(gong)作(zuo)起(qi)了至关重要的(de)(de)(de)(de)(de)作(zuo)用(yong)(yong)(yong)。同(tong)样，您在(zai)使用(yong)(yong)(yong)它(ta)(ta)的(de)(de)(de)(de)(de)时(shi)(shi)(shi)候，一(yi)(yi)定(ding)要正(zheng)确地安(an)装它(ta)(ta)。保(bao)(bao)险(xian)(xian)(xian)丝(si)(si)构成(cheng)(cheng)编辑保(bao)(bao)险(xian)(xian)(xian)丝(si)(si)基本组(zu)成(cheng)(cheng)一(yi)(yi)般保(bao)(bao)险(xian)(xian)(xian)丝(si)(si)由(you)三(san)个部(bu)分组(zu)成(cheng)(cheng)：一(yi)(yi)是熔(rong)(rong)(rong)体(ti)部(bu)分，它(ta)(ta)是保(bao)(bao)险(xian)(xian)(xian)丝(si)(si)的(de)(de)(de)(de)(de)**，熔(rong)(rong)(rong)断(duan)(duan)(duan)时(shi)(shi)(shi)起(qi)到(dao)切断(duan)(duan)(duan)电(dian)(dian)流(liu)(liu)的(de)(de)(de)(de)(de)作(zuo)用(yong)(yong)(yong)。同(tong)一(yi)(yi)类、同(tong)一(yi)(yi)规格保(bao)(bao)险(xian)(xian)(xian)丝(si)(si)的(de)(de)(de)(de)(de)熔(rong)(rong)(rong)体(ti)。低压配(pei)电(dian)(dian)系统中熔(rong)(rong)(rong)断(duan)(duan)(duan)器是起(qi)安(an)全保(bao)(bao)护作(zuo)用(yong)(yong)(yong)的(de)(de)(de)(de)(de)一(yi)(yi)种电(dian)(dian)器，熔(rong)(rong)(rong)断(duan)(duan)(duan)器广(guang)泛应(ying)用(yong)(yong)(yong)于(yu)电(dian)(dian)网保(bao)(bao)护和用(yong)(yong)(yong)电(dian)(dian)设备保(bao)(bao)护。湖南电(dian)(dian)力熔(rong)(rong)(rong)断(duan)(duan)(duan)器

通常选(xuan)用铅锡合金熔体(ti)的(de)RQA系(xi)列熔断器。湖南电力熔断器

收(shou)藏(zang)查看(kan)我的(de)(de)收(shou)藏(zang)0有(you)用(yong)(yong)+1已投(tou)票(piao)0限(xian)(xian)流(liu)(liu)(liu)式(shi)(shi)(shi)熔(rong)(rong)(rong)(rong)断(duan)(duan)(duan)器(qi)编辑(ji)锁定讨论(lun)本词(ci)条(tiao)由(you)(you)“科(ke)普中(zhong)(zhong)国”科(ke)学(xue)百(bai)科(ke)词(ci)条(tiao)编写与应(ying)用(yong)(yong)工(gong)作项目(mu)审(shen)核。限(xian)(xian)流(liu)(liu)(liu)式(shi)(shi)(shi)熔(rong)(rong)(rong)(rong)断(duan)(duan)(duan)器(qi)（current-limitingfuse）是(shi)具有(you)限(xian)(xian)制(zhi)短(duan)路(lu)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)能力(li)(li)(li)并能迅速切(qie)断(duan)(duan)(duan)故障电(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)的(de)(de)封(feng)闭式(shi)(shi)(shi)熔(rong)(rong)(rong)(rong)断(duan)(duan)(duan)器(qi)。其(qi)结(jie)(jie)构(gou)特点是(shi)将熔(rong)(rong)(rong)(rong)体置(zhi)于充满(man)石(shi)英砂的(de)(de)封(feng)闭瓷管(guan)中(zhong)(zhong)制(zhi)成。也有(you)采用(yong)(yong)串联附加限(xian)(xian)流(liu)(liu)(liu)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻，以限(xian)(xian)制(zhi)短(duan)路(lu)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)并降低(di)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)切(qie)断(duan)(duan)(duan)时引(yin)起的(de)(de)过电(dian)(dian)(dian)(dian)(dian)(dian)(dian)压。[1]中(zhong)(zhong)文名(ming)限(xian)(xian)流(liu)(liu)(liu)式(shi)(shi)(shi)熔(rong)(rong)(rong)(rong)断(duan)(duan)(duan)器(qi)外文名(ming)current-limitingfuse作用(yong)(yong)限(xian)(xian)制(zhi)短(duan)路(lu)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)能力(li)(li)(li)学(xue)科(ke)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)力(li)(li)(li)工(gong)程(cheng)结(jie)(jie)构(gou)组成熔(rong)(rong)(rong)(rong)丝管(guan)、接触(chu)导(dao)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)系(xi)统等(deng)举例RN1型熔(rong)(rong)(rong)(rong)断(duan)(duan)(duan)器(qi)目(mu)录(lu)1高(gao)(gao)压熔(rong)(rong)(rong)(rong)断(duan)(duan)(duan)器(qi)2限(xian)(xian)流(liu)(liu)(liu)式(shi)(shi)(shi)熔(rong)(rong)(rong)(rong)断(duan)(duan)(duan)器(qi)结(jie)(jie)构(gou)3限(xian)(xian)流(liu)(liu)(liu)式(shi)(shi)(shi)熔(rong)(rong)(rong)(rong)断(duan)(duan)(duan)器(qi)特点4设计要点限(xian)(xian)流(liu)(liu)(liu)式(shi)(shi)(shi)熔(rong)(rong)(rong)(rong)断(duan)(duan)(duan)器(qi)高(gao)(gao)压熔(rong)(rong)(rong)(rong)断(duan)(duan)(duan)器(qi)编辑(ji)高(gao)(gao)压熔(rong)(rong)(rong)(rong)断(duan)(duan)(duan)器(qi)是(shi)在电(dian)(dian)(dian)(dian)(dian)(dian)(dian)网中(zhong)(zhong)人为设置(zhi)的(de)(de)一个**薄弱(ruo)的(de)(de)元件，当(dang)过电(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)流(liu)(liu)(liu)过时，元件本身(shen)发热熔(rong)(rong)(rong)(rong)断(duan)(duan)(duan)，借灭弧(hu)介质(zhi)的(de)(de)作用(yong)(yong)使电(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)开(kai)断(duan)(duan)(duan)，达到保护电(dian)(dian)(dian)(dian)(dian)(dian)(dian)力(li)(li)(li)线(xian)路(lu)和电(dian)(dian)(dian)(dian)(dian)(dian)(dian)气设备的(de)(de)目(mu)的(de)(de)。熔(rong)(rong)(rong)(rong)断(duan)(duan)(duan)器(qi)在电(dian)(dian)(dian)(dian)(dian)(dian)(dian)压低(di)于35千(qian)伏的(de)(de)小容量电(dian)(dian)(dian)(dian)(dian)(dian)(dian)网中(zhong)(zhong)被采用(yong)(yong)。熔(rong)(rong)(rong)(rong)断(duan)(duan)(duan)器(qi)由(you)(you)熔(rong)(rong)(rong)(rong)丝管(guan)、接触(chu)导(dao)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)系(xi)统、支柱绝缘子、底板（或安装板）四部分组成。它可分为限(xian)(xian)流(liu)(liu)(liu)式(shi)(shi)(shi)熔(rong)(rong)(rong)(rong)断(duan)(duan)(duan)器(qi)与跌落式(shi)(shi)(shi)熔(rong)(rong)(rong)(rong)断(duan)(duan)(duan)器(qi)两类(lei)。限(xian)(xian)流(liu)(liu)(liu)式(shi)(shi)(shi)熔(rong)(rong)(rong)(rong)断(duan)(duan)(duan)器(qi)限(xian)(xian)流(liu)(liu)(liu)式(shi)(shi)(shi)熔(rong)(rong)(rong)(rong)断(duan)(duan)(duan)器(qi)结(jie)(jie)构(gou)编辑(ji)如下图所(suo)示，限(xian)(xian)流(liu)(liu)(liu)式(shi)(shi)(shi)熔(rong)(rong)(rong)(rong)断(duan)(duan)(duan)器(qi)的(de)(de)熔(rong)(rong)(rong)(rong)丝装在充满(man)石(shi)英砂的(de)(de)瓷管(guan)中(zhong)(zhong)，当(dang)过电(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)使熔(rong)(rong)(rong)(rong)丝熔(rong)(rong)(rong)(rong)断(duan)(duan)(duan)时，在瓷管(guan)内(nei)产生电(dian)(dian)(dian)(dian)(dian)(dian)(dian)弧(hu)，由(you)(you)于石(shi)英砂对电(dian)(dian)(dian)(dian)(dian)(dian)(dian)弧(hu)的(de)(de)冷却和去游离作用(yong)(yong)。湖南电(dian)(dian)(dian)(dian)(dian)(dian)(dian)力(li)(li)(li)熔(rong)(rong)(rong)(rong)断(duan)(duan)(duan)器(qi)

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