MV156-PDPMV1

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描述

MV156-PDPMV1

箱式變電站（簡稱箱變）一般由高壓室、變壓器室和低壓室組成。根據(jù)產(chǎn)品結(jié)構(gòu)不同及采用元器件的不同，分為歐式箱變和美式箱變兩種典型風(fēng)格。
? ? 我國自70年代后期，從法國、德國等國引進(jìn)及仿制的箱式變電站，從結(jié)構(gòu)上采用高、低壓開關(guān)柜，變壓器組成方式，這種箱變稱為歐式箱變，形象比喻為給高、低壓開關(guān)柜、變壓器蓋了房子。從90年代起，我國引進(jìn)美國箱式變電站，在結(jié)構(gòu)上將負(fù)荷開關(guān)，環(huán)網(wǎng)開關(guān)和熔斷器結(jié)構(gòu)簡化放入變壓器油箱浸在油中。避雷器也采用油浸式氧化鋅避雷器。變壓器取消油枕，油箱及散熱器暴露在空氣中，這種箱變稱為美式箱變，形象比喻為變壓器旁邊掛個(gè)箱子。從體積上看，歐式箱變由于內(nèi)部安裝常規(guī)開關(guān)柜及變壓器，產(chǎn)品體積較大。美式箱變由于采用一體化安裝體積較小。從保護(hù)方面，歐式箱變高壓側(cè)采用負(fù)荷開關(guān)加限流熔斷器保護(hù)。發(fā)生一相熔斷器熔斷時(shí)，用熔斷器的撞針使負(fù)荷開關(guān)三相同時(shí)分閘，避免缺相運(yùn)行，要求負(fù)荷開關(guān)具有切斷轉(zhuǎn)移電流能力。低壓側(cè)采用負(fù)荷開關(guān)加限流熔斷器保護(hù)，美式箱變高壓側(cè)采用熔斷器保護(hù)，而負(fù)荷開關(guān)只起投切轉(zhuǎn)換和切斷高壓負(fù)荷電流的功能，容量較小。當(dāng)高壓側(cè)出現(xiàn)一相熔絲熔斷，低壓側(cè)的電壓就降低，塑殼自動(dòng)空氣開關(guān)欠電壓保護(hù)或過電流保護(hù)就會動(dòng)作，低壓運(yùn)行不會發(fā)生。從產(chǎn)品成本看，歐式箱變成本高。從產(chǎn)品降價(jià)空間看，美式箱變還存在較大降價(jià)空間，一方面美式箱變?nèi)辔逯F心可改為三相三柱鐵心，另一方面，美式箱變的高壓部分可以改型后從變壓器油箱內(nèi)挪到油箱外，占用高壓室空間。

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)勢價(jià)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
品牌：ABB???,AB??,GE,FOXBORO,本特利，英維思，伍德沃德，西屋，瑞恩，施耐德，西門子，摩托羅拉，安川。力士樂。ACSO，橫河等進(jìn)口品牌。 專業(yè)銷售進(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，?？怂共_、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(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)會一種至于其它的學(xué)習(xí)起來也就簡單了。

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