GE DS200GDPAG1ALF电源电路板
1 A或5 A的电流互感器次级可与PQM一起用于相位和中性点检测。每个电流输入有3个端子：5A输入、1A输入和公共。选择1 A或5 A端子和公共端子，以匹配相位CT次级。接线图中所示的正确极性对于正确测量所有电量至关重要。所选CT应能够向总二次负载提供所需电流，包括额定二次电流下0.1VA的PQM负载和连接布线负载。所有PQM内部计算均基于CT和VT输入处测量的信息。本手册中规定的精度假定外部CT和VT没有误差贡献。为确保最大精度，建议使用仪器级CT和VT。
Current transformer secondaries of 1 A or 5 A can be used with the PQM for phase and neutral sensing. Each current input has 3 terminals: 5 A input, 1 A input, and common. Select either the 1 A or 5 A terminal and common to match the phase CT secondary. Correct polarity as indicated in the wiring diagrams is essential for correct measurement of all power quantities. The CTs selected should be capable of supplying the required current to the total secondary load, including the PQM burden of 0.1 VA at rated secondary current and the connection wiring burden. All PQM internal calculations are based on information measured at the CT and VT inputs. The accuracy specified in this manual assumes no error contribution from the external CTs and VTs. To ensure the greatest accuracy, Instrument class CTs and VTs are recommended.
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