ABB RET650 Technical Manual page 184

Section 8
Current protection
178
I3P
Calculation
of final
temperature
Current base used
Binary input:
Forced cooling
Management of
On/Off
setting
parameters: Tau
IEC08000040 V2 EN
Figure 77: Functional overview of TRPTTR
Final Temp
> TripTemp
Calculation
of heat
content
Actual Temp >
Alarm1,Alarm2
Actual Temp
Actual Temp
Tau used
Calculation
of time to
Calculation
of time to
reset of
1MRK 504 135-UEN A
actual heat comtent
Temp
> TripTemp
LOCKOUT
S
R
< Recl
Temp
WARNING if time to trip < set value
trip
lockout
IEC08000040-2-en.vsd
Technical manual
START
ALARM1
ALARM2
TRIP
TTRIP
TRESLO