3HAC037084-001

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選擇深圳長欣,選擇放心,售后無憂
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描述

3HAC037084-001

如果出現(xiàn)外殼帶電,摸到有明顯的刺痛感,這種情況就有可能屬于漏電了,遇到這種情況應(yīng)該從防范漏電入手。
最簡單的做法就是交換火線和零線的位置(如將兩相插頭轉(zhuǎn)180度后再插入插座),這種方法一般很有效。因?yàn)橛行┯秒娖鞅仨氉裱白罅阌一稹钡脑瓌t,插反后就會出現(xiàn)外殼漏電的現(xiàn)象。尤其是電腦及打印機(jī)等更要嚴(yán)格遵循這個原則。筆者就曾遇到了這種情況,插頭插反后電腦主機(jī)和打印機(jī)都帶了電,手不敢碰金屬外殼,用電筆測試,氖泡很亮,用萬用表測它與地的電壓竟達(dá)到160多伏,交換火線和零線的位置后就一點(diǎn)電也不帶了。
清掃電路板的灰塵,尤其是電源主板的灰塵。因?yàn)槿绻覊m多了有時就會導(dǎo)電(特別是受潮時),把高壓和低壓部分連通后外殼就可能帶電。這種情況應(yīng)清理電路板上的灰塵,如果受潮后的灰塵不易除去,則用無水酒精清洗,完了以后用電吹風(fēng)吹干驅(qū)除潮氣。如果以上方法都不行,那么最有效的方法就是將外殼接地。把這些電引到地,人就不會被“電”了。
實(shí)際上,電腦在日常應(yīng)用中通常是和多個外設(shè)連起來的,如顯示器、打印機(jī)和掃描儀等甚至還有局域網(wǎng),只要有一個設(shè)備漏電,那么通過數(shù)據(jù)線或網(wǎng)線就會把電串到每一個設(shè)備上。所以,我們有時摸到電腦主機(jī)箱有電,但不一定是電腦主機(jī)漏的電,我們在檢查時應(yīng)斷開連接,逐個檢查,找到“漏電元兇”。應(yīng)該安裝漏電保護(hù)開關(guān)或漏電保護(hù)插座,對防范嚴(yán)重漏電事故的發(fā)生有較好效果。

產(chǎn)品承諾:
保?證?全新原裝進(jìn)口,
保?證?安全準(zhǔn)時發(fā)貨,
保?證售后服務(wù)質(zhì)量,
優(yōu)勢價格,大量現(xiàn)貨。

主營DCS系統(tǒng)配件
機(jī)器人系統(tǒng)配件
大型伺服系統(tǒng)配件
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Triconex?Siemens?Yaskawa?ABB?GE?Ovation?AB?Foxboro?Motorola?Schneider?XYCOM?KUKA
? 專業(yè)銷售進(jìn)口DCS? PLC系統(tǒng)備件模塊 15天包退換 一年質(zhì)保 大量現(xiàn)貨? 國內(nèi)實(shí)力庫存商家

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專業(yè)銷售進(jìn)口DCS? PLC系統(tǒng)備件模塊

PLC模塊,可編程控制器,CPU模塊,IO模塊,AI模塊,通訊模塊。AB/施耐德/ABB/GE/本特利/西屋/英維斯/霍尼韋爾/黑馬/FU克斯波羅

15天包退換 一年質(zhì)保 大量現(xiàn)貨? 國內(nèi)實(shí)力庫存商家


選擇深圳長欣,選擇放心,售后無憂大量現(xiàn)貨,當(dāng)天順豐發(fā)貨!
主營:本特利,英維思,伍德沃德,福克斯波羅、西屋、瑞恩、施耐德莫迪康、ABB、AB、西門子、摩托羅拉、GE發(fā)那科、安川、博世力士樂,ACSO,力士樂等各大品牌的DCS系統(tǒng)配件,機(jī)器人系統(tǒng)配件,大型伺服系統(tǒng)備件。

先介紹幾點(diǎn)經(jīng)驗(yàn)。
1、先通讀一遍“系統(tǒng)手冊”(不管能不能看懂,先了解個大概,以便學(xué)習(xí)編程時查找);
2、由位控邏輯入手,逐漸增加定時、計數(shù)等條件,把或、與、非關(guān)系理順;
3、進(jìn)而練習(xí)整數(shù)運(yùn)算、實(shí)數(shù)運(yùn)算、類型轉(zhuǎn)換;
4、量程轉(zhuǎn)換、PID調(diào)節(jié)回路的建立及P、I、D參數(shù)的理解(最好是有個物理回路驗(yàn)證,比如變頻器+電機(jī)+測速傳感器);
5、循環(huán)、順序、跳轉(zhuǎn)等程序控制(盡量避免跳轉(zhuǎn),非跳不可時也是跳的越近越好);
6、中斷、通訊、位置控制....

本人以ABB工業(yè)機(jī)器人配件DSQC系列和Motorola MVME系列,GE 卡件 模塊 驅(qū)動器系列為主攻。各位電工朋友可根據(jù)自己的條件選擇適合自己的PLC品牌,由于PLC的基本框架大同小異,學(xué)會一種至于其它的學(xué)習(xí)起來也就簡單了。