GE Industrial Solutions Entellisys 4.0 System User Manual - Manual (Page 75)

Single Point Relay protection 75
5
Blocking Voltage Enabled: Select Enabled in the Blocking Voltage section to enable the
blocking voltage. If the option is enabled, the blocking voltage setting is 10% of the nominal
voltage.
Open Trip: Select the command issued when the relay operates from the Open Trip drop-down
menu. Options are Open and don't activate lockout and Trip and activate lockout.
Figure 5-6 Settings for Over Frequency Relay
5.2.3.5 Usage
Event logging
The following events are logged for the over frequency relay in the Entellisys HMI:
•
Alarm Pickup Over Frequency – Alarm only over frequency relay has entered pickup.
•
Alarm Over Frequency – Alarm only over frequency relay has operated.
•
Alarm Dropout Over Frequency – Alarm only over frequency relay has dropped out of pickup.
•
Voltage Below Overfreq Alarm Blocking Voltage – The voltage has dropped below the alarm
only over frequency blocking voltage threshold.
•
Voltage Above Overfreq Alarm Blocking Voltage – The voltage has exceeded the alarm only
over frequency blocking voltage threshold.
•
Pickup Over Frequency – Over frequency relay has entered pickup.
•
Breaker Trip Over Frequency – Over frequency relay has operated.
•
Dropout Over Frequency – Over frequency relay has dropped out of pickup.