GE DS3800NPSM1G1E转换滤波板
阴影区域=发生相位反转之前允许的角度公差图4–24：3线三角形（2 Vts开路三角形）连接的相位反转当使用单相直接连接时，相位反转功能将永远不会运行。•电压相位反转延迟：如果在此设定点中编程的时间内存在电压相位反转，则会出现电压相位反转情况。•平均电流THD继电器：可以禁用过多相电流THD检测，用作报警或过程控制。如果不需要此功能，则将此设置点设置为OFF。选择报警继电器将使报警继电器激活，并在平均电流THD过大的情况下显示报警信息。选择辅助继电器将激活辅助继电器，但不会显示任何信息。这用于过程控制。•平均电流THD水平：当测得的平均电流THD超过该设定值时，会出现平均电流THT情况
shaded area = angle tolerance allowed before phase reversal will occur FIGURE 4–24: Phase Reversal For 3-wire Delta (2 Vts Open-delta) Connection When the SINGLE PHASE DIRECT connection is used the phase reversal feature will never operate. • VOLTAGE PHASE REVERSAL DELAY: If a voltage phase reversal exists for the time programmed in this setpoint a voltage phase reversal condition will occur.• AVERAGE CURRENT THD RELAY: Excessive phase current THD detection can either be disabled, used as an alarm, or as a process control. Set this setpoint to OFF if the feature is not required. Selecting alarm relay will cause the alarm relay to activate and display an alarm message whenever an excessive average current THD condition exists. Selecting auxiliary relay will cause the auxiliary relay to activate, but no message will be displayed. This is intended for process control. • AVERAGE CURRENT THD LEVEL: When the measured average current THD exceeds this setpoint value, an average current THD condition occurs
