Eaton EMR-4000, Инструкция по установке, эксплуатации и обслуживанию, Страница: 640 / 960

EMR-4000 IM02602009E
Values of the Frequency Protection Module
Value Description Default Size Menu path
nPickups Number of alarms since last reset. 0 0 - 9999999999 [Operation
/History
/PickupCr]
nTripCmds Number of trip commands since last reset. 0 0 - 9999999999 [Operation
/History
/TripCmdCr]
Commissioning: Overfrequency [ANSI 81O]
Object to be tested:
All configured overfrequency protection stages.
Necessary means:
Three-phase voltage source with variable frequency; and
Timer
Procedure:
Testing the threshold values
Keep on increasing the frequency until the respective frequency element is activated;
Note the frequency value; and
Disconnect the test voltage.
Testing the trip delay
Set the test voltage to nominal frequency and
Now connect a frequency jump (activation value) and then start a timer. Measure the tripping time at the relay
output.
Testing the fallback ratio:
Reduce the measuring quantity to less than 99.95% of the trip value (or 0.05% fn). The relay must only fall back at
99.95% of the trip value at the earliest (or 0.05% fn).
Successful test result:
Permissible deviations/tolerances can be taken from the Technical Data.
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