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When the current is so high that it has given a start signal START, the estimated time
to trip is continuously calculated and given as analogue output TTRIP. If this
calculated time get less than the setting time Warning, set in minutes, the output
WARNING is activated.
In case of trip a pulse with a set duration
tPulse
is activated.
Calculation
of final
temperature
I3P
Calculation
of heat
content
Final Temp
> TripTemp
HEATCONT
Actual Temp >
Alarm1,Alarm2
Temp
Actual Temp
> TripTemp
ALARM1
TRIP
Actual Temp
< Recl
Temp
START
Calculation
of time to
trip
Calculation
of time to
reset of
lockout
TTRIP
TRESCAL
Management of
setting
parameters: Tau,
IBase
Current base used
COOLING
Tau used
ALARM2
WARNING
IEC05000833-2-en.vsd
S
R
LOCKOUT
ENMULT
RESET
IEC05000833 V2 EN
Figure 183:
Functional overview of TRPTTR
Section 8
1MRK502052-UEN B
Current protection
406
Technical manual
Summary of Contents for Relion REG670
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