ABB REL650 series - Page 261

Calculation
of final
temperature
IA, IB, IC
Calculation
of actual
temperature
Final Temp
> TripTemp
actual temperature
PICKUP
Actual Temp >
AlarmTemp
Actual Temp
> TripTemp
ALARM
TRIP
Actual Temp
< Recl Temp
Calculation
of time to
trip
Calculation
of time to
reset of
lockout
TTRIP
TENRECL
ANSI09000637-2-en.vsd
Lock-
out
logic
LOCKOUT
ANSI09000637 V2 EN
Figure 114: Functional overview of LFPTTR/LCPTTR (26)
1MRK 506 335-UUS A Section 7
Current protection
255
Technical manual