高壓變頻器小室開挖深800mm,寬600mm的電纜溝將高壓變頻器柜和小室南墻處的電纜溝相連,電纜溝內水平每1500mm預制一副雙層電纜支架,上層支架用于敷設動力電纜,下層支架用于敷設控制電纜,支架頂層距離地面不小于300mm,層間距不小于300mm,電纜溝支架導體部分需用40*5mm的扁鋼連接,和我司主接地網相連,接地電阻小于4歐姆。
3.1.2.6電纜溝用于放置電纜溝蓋板的折口需用角鋼包邊,電纜溝蓋板的包邊需用角鋼包邊,工藝美觀。
3.1.2.7高壓變頻器小室原有的大窗戶需拆除改造成進風濾網,將高壓變頻器小室和電機庫相連的北門封堵,預留空間用于嵌入一臺5P空調室內機。高壓變頻器小室西墻開孔,預留空間嵌入一臺5P空調室內機。
3.1.2.8高壓變頻器小室墻面底部打3個孔,用于敷設空調室內機和室外機的連接部分。
3.1.2.9電纜溝需做好防雨水倒灌措施,高壓變頻器小室地面敷設整塊高壓絕緣墊,應有效防止高壓變頻器小室的負壓將電纜溝內潮氣吸入。
3.1.2.10引風機原使用的液力耦合器拆除,電機基礎前移,使電機和引風機風葉連接,電機原用于穿設電纜的套管應同步前移。
3.1.2.11高壓電纜交接和預防性試驗合格。
3.1.2.12引風機高壓電機全部改成高速接線方式。
3.1.2.13高壓變頻器調節與監控全部由DCS實現。
3.1.2.14高壓變頻器室需增加環境溫度測量,采用PT100測量元件,裝溫濕度計。
3.1.2.15原有擋板及控制回路保留。
3.1.2.16送、引風機電機進行變頻改造后,原先DCS系統對送、引風系統的控制方式發生了根本改變,對所有設計系統的順控、自動邏輯和畫面進行全面修改,增加變頻模式下操作、順控啟停、事故聯鎖、協調控制等功能。如果沒有及時更換單元,再次有其他單元故障,變頻器還能旁路一組單元,同時發出“二級單元旁路”輕故障報警,此時,變頻器雖已旁路兩組單元(如圖2b所示),但仍不影響變頻器正常運行,只是變頻器整體出力會下降15%左右。
3)變頻器配置自動旁路柜——當變頻器出現“二級單元旁路”故障后,沒有及時更改單元,再出現其他單元故障時,變頻器將報“重故障”,同時驅動整體旁路功能,將變頻器完全旁路出來,使風機徹底脫離變頻器控制——工頻運行,如圖3所示。of the pump station and unit, the operation scheduling and control of the control gate of the pump station, the drainage scheduling and control of the lower channel of the unit, the operation control of the dispatching gate and water supply gate, the operation control of the auxiliary equipment of the pump station, and browse and query the operation data and historical data of the pump station. Collect the data information in the field in real time and store it in the database. It has strong real-time performance and high processing efficiency, and the response time to access is short; The real-time performance of the acquisition interface is good. The alarm is carried out by means of audible and visual alarm, which greatly improves the safety index and meets the needs of its application.
4、 Features of configuration software:
Monitoring configuration software is a high-end product designed and developed according to the current development trend of automation technology, summarizing many