2.9 Overfrequency and
underfrequency Protection f>, f<
(81H/81L)
2 Protection functions
Technical description
68
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VM55.EN005
Recorded values of the latest eight faults
There are detailed information available of the eight latest
faults: Time stamp, frequency during fault, elapsed delay and
setting group.
Recorded values of the over & under frequency stages (8
latest faults) f><, f>><<, f<, f<< (81H/81L):
Parameter
Value
Unit Description
yyyy-mm-dd
Time stamp of the recording, date
hh:mm:ss.ms
Time stamp, time of day
Flt
Hz
Faulty frequency
EDly
%
Elapsed time of the operating time
setting. 100% = trip
SetGrp
1
2
Active setting group during fault
Содержание VAMP 55
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