GE DS3800XPEX1B1A驱动板
•欠电压水平：当一、二相或三相上的电压降至或低于该水平时，出现欠电压情况。所需相位数由U/V操作所需相位设定值确定。要清除欠电压状态，电压必须增加到欠电压电平设置的103%。例如，如果欠电压电平设置为4000 V，则当适当相位的电压增加到4120 V（4000×1.03）以上时，该条件将清除。实施该滞后是为了避免电压波动引起的干扰警报。•欠电压延迟：如果电压降到或低于欠电压水平设定值，并且在该设定值中编程的时间延迟内保持这种状态，则会出现欠电压情况。
• UNDERVOLTAGE LEVEL: When the voltage on one, two, or three phases drops to or below this level, an undervoltage condition occurs. The number of phases required is determined by the PHASES REQUIRED FOR U/V OPERATION setpoint. To clear the undervoltage condition, the level must increase to 103% of the UNDERVOLTAGE LEVEL setting. For example, if the UNDERVOLTAGE LEVEL is set to 4000 V, the condition clears when the voltage in the appropriate phase(s) increases above 4120 V (4000 × 1.03). This hysteresis is implemented to avoid nuisance alarms due to voltage fluctuations. • UNDERVOLTAGE DELAY: If the voltage drops to or below the UNDERVOLTAGE LEVEL setpoint value and remains this way for the time delay programmed in this setpoint, an undervoltage condition will occur.
