ABB DSDX110 YB161102-AH PXI模块
相位CT初级：输入相位电流互感器的初级电流额定值。所有三相CT必须具有相同的额定值。例如，如果使用500:5 CT，则相位CT PRIMARY值输入为500。PHASE CT PRIMARY出厂默认值为OFF。当设置为OFF时，PQM将强制进入报警状态，作为安全预防措施，直到输入有效的CT值。确保CT连接到正确的1 A或5 A端子，以匹配CT次级。•中性电流感应：中性电流感应可通过使用单独的外部CT连接或通过计算实现。使用外部CT时，选择“分离CT”。如果选择“计算”，PQM将使用矢量和I a+I b+I c=I n计算中性电流。如果需要使用PQM内部CT进行剩余连接，中性CT一次必须与相位CT一次相同，以确保读数正确
PHASE CT PRIMARY: Enter the primary current rating of the phase current transformers. All three phase CTs must have the same rating. For example, if 500:5 CTs are used, the PHASE CT PRIMARY value is entered as 500. The PHASE CT PRIMARY factory default is OFF. While set to OFF, the PQM is forced to an alarm state as a safety precaution until a valid CT value is entered. Ensure that the CT is connected to the correct 1 A or 5 A terminals to match the CT secondary. • NEUTRAL CURRENT SENSING: Neutral current sensing can be accomplished by using a separate external CT connection or by calculations. Select SEPARATE CT when using an external CT. If CALCULATED is selected, the PQM calculates the neutral current using the vector sum of I a + I b + I c = I n. If a residual connection is required using the PQM internal CT, the neutral CT primary must be the same as the phase CT primary to ensure correct readings
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