GE Digital Energy Multilin 239, Instruction Manual

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5–62 239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL
CHAPTER 5: MONITORING
FIGURE 5–2: Actual Values Page 1 – Status
5.2.1 General
• SYSTEM STATUS: This message gives an indication if operation is normal or whether a
trip and/or alarm has occurred. Only one condition can cause a trip at a time and this
will be displayed after a trip. When alarms are present the system status will be alarm.
Press
to view all active alarm conditions and the corresponding actual
value that is causing the alarm. Select the corresponding setpoint to determine by
how much the actual value exceeds the alarm setting.
• MOTOR STATUS: This message displays the current status of the motor.
• MOTOR STARTING: This message is displayed when the motor is in a START mode. The
START condition occurs if the average of the three phase currents rises above the full
load current setting in
S2 SYSTEM SETUP\MOTOR DATA\MOTOR FULL LOAD
CURRENT
within 300 ms (worst case) of initial detection of current by the 239.
• TIME TO TRIP: This message is displayed when a trip condition is in progress. The
message display time is scaled as follows:
if the trip time is > 10.0 minutes, the display will be ‘xxx.x MINUTES’
≤
10.0 minutes, the display will be ‘xxx.x SECONDS’
• TIME TO OVERLOAD RESET: This message displays the amount of time remaining
before an OVERLOAD TRIP is allowed to be reset. The time will become 0 when the
thermal capacity decreases to 15%.
• CAUSE OF ALARM: The appropriate alarm message is displayed when the respective
alarm condition is present. More than one alarm message can be present at once.
5.2.2 Last Trip Data
After a trip, all conditions present at the time of trip and the cause of trip are saved in non-
volatile memory. In addition, a trip record of the last 5 causes of trip is also retained for
diagnosing persistent problems.
• CAUSE OF LAST TRIP: Only one condition at a time will cause a trip. The most recent
cause of trip is displayed.
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