GE DS3800HFPB1F1E控制板
Iavg/Vavg：显示三相电流和三个电压的平均值。如果VT接线设置点设置为单相直接，则该线不可见。当VT接线设置为4线Y字形（3个VT）、4线Y形直接、4线W字形（2个VT）或3线直接时，显示L-N。当VT接线设置为3线Δ（2个VT）时，显示L-L。中性电流：中性电流可通过两种方法确定。一种方法通过中性CT输入测量电流。第二个基于三相电流计算中性电流；使用瞬时采样，I a+I b+I c=I n。如果相电流之和不等于0，则结果为中性电流。使用CT输入时，只有CT接线正确且输入了正确的中性CT初始值，中性电流读数才正确。
Iavg/Vavg: Displays the average of the three phase currents and three voltages. This line is not visible if the VT WIRING setpoint is set to SINGLE PHASE DIRECT. L-N is displayed when VT WIRING is set to 4 WIRE WYE (3 VTs), 4 WIRE WYE DIRECT, 4 WIRE WYE (2 VTs), or 3 WIRE DIRECT. L-L is displayed when VT WIRING is set to 3 WIRE DELTA (2 VTs). NEUTRAL CURRENT: Neutral current can be determined by two methods. One method measures the current via the neutral CT input. The second calculates the neutral current based on the three phase currents; using the instantaneous samples, I a + I b + I c = I n. If the sum of the phase currents does not equal 0, the result is the neutral current. When using the CT input, the neutral current reading will be correct only if the CT is wired correctly and the correct neutral CT primary value is entered.
