VAMP VAMP 55, Инструкции по установке, эксплуатации и настройке

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2.7 Undervoltage protection U< (27) 2 Protection functions Technical description
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Parameter Value Unit Description Note
Force Off
On Force flag for status forcing for
test purposes. This is a
common flag for all stages and
output relays, too.
Automatically reset by a 5-
minute timeout. Set
MinU V The supervised minimum of
line-to-line voltages in primary
volts
U<, U<<,
U<<< V Pick-up value scaled to
primary value
U<, U<<,
U<<< %Un Pick-up setting Set
t<, t<<,
t<<< S Definite operation time Set
LVBlk %Un Low limit for self blocking Set
RlsDly S Release delay (U< stage only) Set
Hyster Default
3.0 % % Dead band setting Set
For details of setting ranges see chapter 9.3.
Set = An editable parameter (password needed)
C = Can be cleared to zero
F = Editable when force flag is on
Recorded values of the latest eight faults
There are detailed information available of the eight latest
faults for each of the stages: Time stamp, fault voltage, elapsed
delay, voltage before the fault and setting group.
Recorded values of the undervoltage stages (8 latest faults)
U<, U<<, U<<< (27):
Parameter Value Unit Description
yyyy-mm-dd Time stamp of the recording, date
hh:mm:ss.ms Time stamp, time of day
Flt %Un Minimum fault voltage
EDly % Elapsed time of the operating time
setting. 100% = trip
PreFlt %Un Supervised value before fault, 1 s
average value.
SetGrp 1
2 Active setting group during fault