3511/Tricon

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選擇深圳長(zhǎng)欣,選擇放心,售后無(wú)憂(yōu)
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描述

3511/Tricon

可靠性是指一個(gè)元件、設(shè)備或系統(tǒng)在預(yù)定時(shí)間內(nèi),在規(guī)定的條件下完成規(guī)定功能的能力??煽啃怨こ躺婕暗皆?shù)據(jù)的統(tǒng)計(jì)和處理,系統(tǒng)可靠性的定量評(píng)定,運(yùn)行維護(hù),可靠性和經(jīng)濟(jì)性的協(xié)調(diào)等各方面。具體到繼電保護(hù)裝置,其可靠性是指在該裝置規(guī)定的范圍內(nèi)發(fā)生了它應(yīng)該動(dòng)作的故障時(shí),它不應(yīng)該拒動(dòng)作,而在任何其它該保護(hù)不應(yīng)動(dòng)作的情況下,它不應(yīng)誤動(dòng)作。
繼電保護(hù)裝置的拒動(dòng)和誤動(dòng)都會(huì)給電力系統(tǒng)造成嚴(yán)重危害。但提高其不拒動(dòng)和提高其不誤動(dòng)作的可靠性的措施往往是互相矛盾的。由于電力系統(tǒng)的結(jié)構(gòu)和負(fù)荷性質(zhì)的不同,拒動(dòng)和誤動(dòng)所造成的危害往往不同。例如當(dāng)系統(tǒng)中有充足的旋轉(zhuǎn)備用容量,輸電線(xiàn)路很多,各系統(tǒng)之間和電源與負(fù)荷之間聯(lián)系很緊密時(shí)由于繼電保護(hù)裝置的誤動(dòng)作,使發(fā)電機(jī)變壓器或輸電線(xiàn)路切除而給電力系統(tǒng)造成的影響可能很小;但如果發(fā)電機(jī)變壓器或輸電線(xiàn)路故障時(shí)繼電保護(hù)裝置拒動(dòng)作,將會(huì)造成設(shè)備的損壞或系統(tǒng)穩(wěn)定的破壞,損失是巨大的。在此情況下提高繼電保護(hù)裝置不拒動(dòng)的可靠性比提高其不誤動(dòng)的可靠性更為重要。但在系統(tǒng)中旋轉(zhuǎn)備用容量很少及各系統(tǒng)之間和負(fù)荷和電源之間聯(lián)系比較薄弱的情況下,繼電保護(hù)裝置的誤動(dòng)作使發(fā)電機(jī)變壓器或輸電線(xiàn)切除時(shí),將會(huì)引起對(duì)負(fù)荷供電的中斷甚至造成系統(tǒng)穩(wěn)定的破壞,損失是巨大的。而當(dāng)某一保護(hù)裝置拒動(dòng)時(shí),其后備保護(hù)仍可以動(dòng)作而切除故障,因此在這種情況下提高繼電保護(hù)裝置不誤動(dòng)的可靠性比提高其不拒動(dòng)的可靠性更為重要。

產(chǎn)品承諾:
保?證?全新原裝進(jìn)口,
保?證?安全準(zhǔn)時(shí)發(fā)貨,
保?證售后服務(wù)質(zhì)量,
優(yōu)勢(shì)價(jià)格,大量現(xiàn)貨。

主營(yíng)DCS系統(tǒng)配件
機(jī)器人系統(tǒng)配件
大型伺服系統(tǒng)配件
品牌:ABB???,AB??,GE,FOXBORO,本特利,英維思,伍德沃德,西屋,瑞恩,施耐德,西門(mén)子,摩托羅拉,安川。力士樂(lè)。ACSO,橫河等進(jìn)口品牌。 專(zhuān)業(yè)銷(xiāo)售進(jìn)口DCS? PLC系統(tǒng)備件模塊
Triconex?Siemens?Yaskawa?ABB?GE?Ovation?AB?Foxboro?Motorola?Schneider?XYCOM?KUKA
? 專(zhuān)業(yè)銷(xiāo)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(guó)內(nèi)實(shí)力庫(kù)存商家

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專(zhuān)業(yè)銷(xiāo)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(guó)內(nèi)實(shí)力庫(kù)存商家


選擇深圳長(zhǎng)欣,選擇放心,售后無(wú)憂(yōu)大量現(xiàn)貨,當(dāng)天順豐發(fā)貨!
主營(yíng):本特利,英維思,伍德沃德,??怂共_、西屋、瑞恩、施耐德莫迪康、ABB、AB、西門(mén)子、摩托羅拉、GE發(fā)那科、安川、博世力士樂(lè),ACSO,力士樂(lè)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(cè)”(不管能不能看懂,先了解個(gè)大概,以便學(xué)習(xí)編程時(shí)查找);
2、由位控邏輯入手,逐漸增加定時(shí)、計(jì)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(lèi)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(gè)物理回路驗(yàn)證,比如變頻器+電機(jī)+測(cè)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(shí)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(dòng)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(huì)一種至于其它的學(xué)習(xí)起來(lái)也就簡(jiǎn)單了。