1789-L60羅克韋爾
1789-L60 /allen-bradley
1789-L60正品AB
對於公司而言，斷電則意味著巨大的財務損失。更長時間的斷電會導致航班取消，由此造成的損失是非常巨大的;每取消一趟航班，損失的收益可能高達 20萬美元。而且，公司並不是斷電的受害者。機場每天損失的收益可達250,000.美元，其中特許商店的損失為100,000.美元。
毫無疑問，長時間的斷電會嚴重影響機場、承租方及公司的收益，更不用提因公眾出行受阻而導致的緊張公共關係。
因此，決定擴展機場及其配套設施時，引入電力管理控制係統(PMCS)。
面臨的挑戰
機場的電力控制與測係統由多個小型分散係統組成。這樣一來，不僅難以對係統實施控，報告和報通知也遠遠不足。原始係統配備的電力測器不準確，且通信功能有限。
機場希望使用單一係統來提供測和管理電氣係統所需的全部信息。當務之急是測量能耗。同時們也為新係統設立了其它目標：
● 該係統功能完備、可靠、用戶友好且可擴展
● 需要降低運營成本，能夠更有效地管理能源並將能源成本公平地分攤給承租方
● 能夠分辨和記錄異常事件並發出報
● 在未來預期增長中可進行擴展
● 允許機場工作人員在沒有協助或只需少量協助的情況下輕松添加硬件或修改軟件
有一點要求應予以重視且非常必要：係統需要在供電設施出現故障時保持機場機能完備。在總體規劃中，機場在部分或完全斷電期間不能以降低的應急水平運行。發生異常或災難件時，機場仍需以正常水平全功能運行。
RSView32提供係統的圖形視圖，電氣技術人員和通信中心人員可借此掌握配電係統的情況。此外還提供報通知功能。
RSTrend用於記錄關鍵參數，例如每個配電盤上的電壓與功率因數。Microsoft Access與利用Visual Basic編寫的電能記錄程序一起，提供報表、成本分配以及負荷分布功能。盡管實時電氣參數可以顯示在RSView32屏幕上，但們還採用了RSPower，用來組態Power monitor以及查看Power monitor日志、示波器和諧波。
PMCS的主要功能是能源分布係統測。設備狀態得到測，並以圖形方式清楚地顯示在主測PC上。斷路器、發電機、變壓器、負載櫃及自動轉接開關等設備的狀態點也得到測。係統還會實時測電壓、電流、功率、功率因數等電氣參數。存在異常情況時會發出報。
所有這些信息都顯示在圖形用戶界面上，便於快速了解係統中任何元件的狀態並“深入”係統檢查I/O點、Power monitor以及各個斷路器的狀態和參數。
新型PMCS還可以平衡機場多個發電機之間的負荷。自動負荷卸載與平衡有助於確保發電機以水平運行，同時又能提高其可靠性。
取得的成果
在真正進入項目之前，羅克韋爾自動化的PEMS小組設計並安裝的PMCS係統就已經能滿足機場的每一項要求。該係統甚至還可以根據需要依次開關機場內的燈光，控制照明。“測量數據記錄器”作為該解決方案的另一部分，負責記錄機場上下的能耗，讓機場能夠合理地向承租方收費。
在本文的開始，們介紹了斷電範圍擴大可能帶來的某些潛在損失。從某種意義上講，PMCS就是一份。據估計，該係統的總安裝成本為280萬美元。
幸運的是，自從安裝該係統以來，機場再也沒有遇到任何意外斷電情況。其中也有一部分原因是因為在安裝PMCS之前對配電係統實施過升級。
不過，與斷電造成的巨額損失相比，PMCS只需累積避免八小時斷電時間便可完全抵銷自身的安裝成本!
該係統操作方便，能提高員工的效率，同時有助於更迅速地應對電氣係統故障。此外，該係統還提供潛在故障告功能，因此可以規避某些問題，避免造成重大影響。同時能耗效率也更高。後，還為擴展和升級做了完鋪墊。
下頁中的架構描繪了羅克韋爾自動化的信息化企業概念。棕色虛線括起來的區域代表當前在本文檔中討論的自動化層級。其餘部分說明了羅克韋爾自動化目前為實現車間與企業乃至更深層次的整合所能提供的解決方案。出於保密目的，該客戶希望以匿名形式出現。
9904-HYBS CONTROLNET SINGLE CHANNEL HYBRID (BOX OF 90)
194L-HE4L-175I Load Switch Operating Handle
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2092-DA2 DRIVE, 2.4A/7.2A, ULTRA1500 DIGITAL SERVO DRIVE
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1494C-DJX666-A3-D-E 60A Cable Operated Disconnect Kit
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194R-D63-1753 DIN Fuse 63 A Rotary Disconnect Switch
2711-NF2A FUNCTION KEY STRIP PV900 MONO FOR PANELVIEW 900 MONOCHROME TERMINALS
1492-CA1LBL TERMINAL BLOCK,BLACK 600V MAX
193-EC1DD E3 9-45 A Overload Relay
1336E-AA4 ASSY,ENCL,NEMA1,B FRAME W/HIM CUTOUT
1489-A1D020R UL489 MINI CIRCUIT BIEC60947-2 MINI CIRC
152H-F85FHD-43-1F-3B-4G-4R-BP Controller w/Fusible Disconn
20DC1K0A3ENNBNANL 1030 A 560 kW AC Drive
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豫公安備 41010502000017號