ABB REL650 Technical Manual page 243

1MRK 506 382-UEN A
Line distance protection REL650 2.2 IEC
Technical manual
AMBTEMP
I3P
Calculation of final
temperature
ENMULT
SENSFLT
BLOCK
BLKTR
IEC09000637 V2 EN-US
Figure 111: Functional overview of LCPTTR/LFPTTR
Current protection
Final Temp > Trip Temp
Calculation of actual
temperature
Actual Temp > Alarm Temp
Actual Temp > Trip Temp
Actual Temp < Recl Temp
Calculation of time to trip
Calculation of time to reset
of lockout
Section 7
START
TEMP
ALARM
TRIP
LOCKOUT
Lockout logic
TTRIP
TENRECL
IEC09000637-2-en.vsd
237