GE DS3800HAIC1D1C模拟输入板
如果显示的电压与实际电压不匹配，检查设定点和接线。平均线路电压：显示三个线路电压的平均值。如果VT接线设置点设置为单相直接，则该值不可见。电压不平衡：显示电压不平衡百分比。电压不平衡计算如下所示。如果电压接线配置为WYE输入，则使用相位量计算电压不平衡。如果VT接线配置为DELTA输入，则使用线电压计算电压不平衡。其中：Vav=WYE的平均相电压=（Van+Vbn+Vcn）/3，3线直接连接=3线DELTA/2 VT连接的平均线电压（Vab+Vbc+Vca）/3，Vm=与Vav偏差最大的相（或线）电压，即使使用上述公式可以实现大于100%的不平衡，PQM也会将不平衡读数限制在100%。
If the displayed voltage does not match the actual voltage, check the setpoints and wiring. AVERAGE LINE VOLTAGE: Displays the average of the three line voltages. This value is not visible if the VT WIRING setpoint is set to SINGLE PHASE DIRECT. VOLTAGE UNBALANCE: Displays the percentage voltage unbalance. Voltage unbalance is calculated as shown below. If the VOLTAGE WIRING is configured for a WYE input, voltage unbalance is calculated using phase quantities. If the VT WIRING is configured as a DELTA input, voltage unbalance is calculated using line voltages.where:Vav = average phase voltage = (Van + Vbn + Vcn) / 3 for WYE and 3 WIRE DIRECT connections = average line voltage (Vab + Vbc + Vca) / 3 for 3 WIRE DELTA/2 VTs connection Vm = voltage in a phase (or line) with maximum deviation from Vav, Even though it is possible to achieve unbalance greater than 100% with the above formula, the PQM will limit unbalance readings to 100%.
