ABB Relion 670 Series Technical Reference Manual page 459
Line differential protection ansi
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Also See for Relion 670 Series:
- Technical manual (1432 pages) ,
- Applications manual (944 pages) ,
- Technical reference manual (752 pages)
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1MRK505222-UUS C
Technical reference manual
IA, IB, IC
Calculation
of final
temperature
ANSI09000637 V2 EN
Figure 225:
Functional overview of LPTTR
Current protection
Final Temp
> TripTemp
actual temperature
Calculation
of actual
temperature
Actual Temp >
AlarmTemp
Actual Temp
> TripTemp
Lock-
Actual Temp
< Recl Temp
Calculation
of time to
trip
Calculation
of time to
reset of
lockout
ANSI09000637-2-en.vsd
Section 7
PICKUP
ALARM
TRIP
LOCKOUT
out
logic
TTRIP
TENRECL
453
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