元件的方根特性如各元件邏輯圖所示。包括輸入量，定值，固定邏輯，和產生的輸出操作碼(邏輯圖中用到的縮寫在附錄F中定義)。電流元件與電壓元件的某些整定值,是用計算量的標幺值(pu)來定義的。pu值(標幺值)=實際值1基準值

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SIEMENS CARD 2571

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ALLEN BRADLEY PLC PROCESSOR 1772-LSP

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FANUC CONTROLLER CARD A20B-1000-0800/?068

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KUKA CONTROL CARD FE003/1-1 OR 049300541

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