GE Industrial Solutions Entellisys System User Manual - Manual (Page 61)

Single Point Relay protection 61
5
Figure 5-4 Settings for Undervoltage Relay
5.2.1.4 Usage
Event logging
The following events are logged:
• Alarm Pickup Undervoltage – when the alarm function enters pickup
• Alarm Undervoltage – when the alarm function operates
• Alarm Dropout Undervoltage – when the alarm function drops out
• Pickup Undervoltage – when the trip function enters pickup
• Breaker Trip Undervoltage – when the trip function operates
• Dropout Undervoltage – when the trip function drops out
• Voltage Below Undervoltage Alarm Blocking Voltage – The voltages on all three phases have
dropped below the alarm only undervoltage blocking voltage threshold.
• Voltage Above Undervoltage Alarm Blocking Voltage – The voltage on at least one of the
three phases has exceeded the alarm only undervoltage blocking voltage threshold.
• Voltage Below Undervoltage Blocking Voltage – The voltages on all three phases have
dropped below the undervoltage blocking voltage threshold.
• Voltage Above Undervoltage Blocking Voltage – The voltage on at least one of the three
phases has exceeded the undervoltage blocking voltage threshold.
To view these events, click Sequence of Events on the Main Menu.