GE DS3820DMCB涡轮机控制板
•使用百分比检测I/V警报：选择“是”时，所有电流和电压警报都可以CT和VT的百分比设置。选择“否”时，电流和电压报警都是实际的电压和电流水平。•相位欠电流继电器：可以禁用欠电流，用作报警或过程控制功能。如果不需要此功能，则将此设置点设置为关闭。选择报警继电器将使报警继电器激活，并在出现低电流情况时显示报警信息。选择辅助继电器将导致所选辅助继电器在电流不足情况下激活，但不会显示任何信息。这是用于过程控制的。相欠电流水平：当平均三相电流降至或低于此设置点设置的水平时，将出现相欠电流情况。请参阅下面的DETECT UNDERCURRENT WHEN 0A（检测电流不足时0A）设定值说明，以启用/禁用低于CT 5%的电流不足检测。
• DETECT I/V ALARMS USING PERCENTAGE: When YES is selected, all current and voltage alarms can be set in percentages of CT and VT. When NO is selected, all current and voltage alarms are actual voltage and current levels. • PHASE UNDERCURRENT RELAY: Undercurrent can either be disabled, used as an alarm or as a process control feature. 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 undercurrent condition exists. Selecting an auxiliary relay will cause the selected auxiliary relay to activate for an undercurrent condition but no message will be displayed. This is intended for process control.PHASE UNDERCURRENT LEVEL: When the average three phase current drops to or below the level set by this setpoint, a phase undercurrent condition will occur. Refer to the DETECT UNDERCURRENT WHEN 0A setpoint description below to enable/ disable undercurrent detection below 5% of CT.
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