ABB Relion 670 series - Page 529

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
PICKUP
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
ANSI05000833-2-en.vsd
S
R
LOCKOUT
ENMULT
RESET
ANSI05000833 V2 EN-US
Figure 273: Functional overview of TRPTTR (49)
1MRK 502 066-UUS B Section 8
Current protection
523
Technical manual