CHAPTER 5: SETPOINTS
489 GENERATOR MANAGEMENT RELAY – INSTRUCTION MANUAL 5–17
These commands may be used to clear various historical data.
• CLEAR LAST TRIP DATA: The Last Trip Data may be cleared by executing this
command.
• CLEAR MWh and Mvarh METERS: Executing this command will clear the MWh and
Mvarh metering to zero.
• CLEAR PEAK DEMAND DATA: Execute this command to clear peak demand values.
• CLEAR RTD MAXIMUMS: All maximum RTD temperature measurements are stored
and updated each time a new maximum temperature is established. Execute this
command to clear the maximum values.
• CLEAR ANALOG I/P MIN/MAX: The minimum and maximum analog input values are
stored for each Analog Input. Those minimum and maximum values may be cleared
at any time.
• CLEAR TRIP COUNTERS: There are counters for each possible type of trip. Those
counters may be cleared by executing this command.
• CLEAR EVENT RECORD: The event recorder saves the last 256 events, automatically
overwriting the oldest event. If desired, all events can be cleared using this command
to prevent confusion with old information.
• CLEAR GENERATOR INFORMATION: The number of thermal resets and the total
generator running hours can be viewed in actual values. On a new installation, or if
new equipment is installed, this information is cleared through this setpoint.
• CLEAR BREAKER INFORMATION: The total number of breaker operations can be
viewed in actual values. On a new installation or if maintenance work is done on the
breaker, this accumulator can be cleared with this setpoint.
MESSAGE
CLEAR BREAKER
INFORMATION: No
Range: No, Yes
Courtesy of NationalSwitchgear.com
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