ABB Relion Technical Manual page 246

Section 8
Current protection
240
I3P
Calculation
of final
temperature
Current base used
Binary input:
Forced cooling
Enabled/
Management of
Disabled
setting
parameters: Tau
ANSI08000040 V1 EN
Figure 107: Functional overview of TRPTTR (49)
Final Temp
> TripTemp
Calculation
of heat
content
Actual Temp >
Alarm1,Alarm2
Actual Temp
> TripTemp
Actual Temp
Tau used
Calculation
of time to
Calculation
of time to
reset of
lockout
1MRK 502 048-UUS A
PICKUP
actual heat comtent
ALARM1
ALARM2
Temp
LOCKOUT
S
R
< Recl
Temp
WARNING if time to trip < set value
trip
TRESLO
ANSI08000040-1-en.vsd
Technical manual
TRIP
TTRIP