Schweitzer Engineering Laboratories SEL-352-1 - Fault Current Protection Scheme 2; Fault Current Protection Scheme 3

Date Code 20010731 Setting the Relay 7-19
SEL-352-1, -2 Instruction Manual
Fault Current Protection Scheme 2
The default SEL
OGIC control equation settings for the fault current protection logic Scheme 2
follow:
TTA =NA
TTB =NA
TTC =NA
LFAS =TRIPA*50FTA
LFAR =!50FTA
LFBS =TRIPB*50FTB
LFBR =!50FTB
LFCS =TRIPC*50FTC
LFCR =!50FTC
FCA =LFAQ
FCB =LFBQ
FCC =LFCQ
FBF =FCAD + FCBD + FCCD
Fault Current Protection Scheme 3
The default SEL
OGIC control equation settings for the fault current protection logic Scheme 3
follow:
TTA =NA
TTB =NA
TTC =NA
LFAS =NA
LFAR =NA
LFBS =NA
LFBR =NA
LFCS =NA
LFCR =NA
FCA =50FTA*TRIPA
FCB =50FTB*TRIPB
FCC =50FTC*TRIPC
FBF =FCAD + FCBD + FCCD