Schweitzer Engineering Laboratories SEL-251 - Page 82

3-24 Communications Date Code 970103
SEL-251, -2, -3 Instruction Manual
79OI1 : Open Int 1, cyc...........................................= 60 ? 0-16000
Reclosing relay open interval time no. 1
79OI1=0 defeats reclosing
79OI2 :....................................................................= 600 ? "
Reclosing relay open interval time no. 2
79OI3 :....................................................................= 900 ? "
Reclosing relay open interval time no. 3
79OI4 :....................................................................= 0 ? "
Reclosing relay open interval time no. 4
79RST : Reset Int, cyc .............................................= 7200 ? "
Reclosing relay reset interval time
M79SH : Shot Mask..................................................= 00000 ? 00000 to 11111 binary
Reclosing relay shot mask: designate 79SH bit assertion for shots 0, 1, 2, 3, or 4
50C : A sec..........................................................= 99.99 ? 0.50-100.00
Pickup for phase instantaneous overcurrent element 50C
27L : V l-l sec......................................................= 0.00 ? 0-140
Low-set limit for undervoltage element 27
27H : V l-l sec......................................................= 0.00 ? "
High-set limit for undervoltage element 27
27C : 2, 3 Ph or 4 = HS Blown Fuse...................= 2 ?
Select whether 27 is a phase-to-phase or three phase-to-phase element,
or select 4 to enable blown-fuse detection
TCI : 0=none, V=27, I=50C, 3=both ..................= 0 ?
Internal torque control conditions
50Q : A sec..........................................................= 99.99 ? 0.50-100.00
Pickup for negative-sequence definite-time overcurrent element 50QT
The element responds to 3*I2
50QT : Dly, cyc......................................................= 0 ? 0-16000
Time delay for negative-sequence definite-time overcurrent element 50QT
51QP : A sec..........................................................= 6.00 ? 1.00-12.00
Pickup for negative-sequence time-overcurrent element 51QT
The element responds to 3*I2
51QTD : Time Dial...................................................= 15.00 ? 0.50-15.00
Time dial for negative-sequence time-overcurrent element 51QT
51QC : Curve 1,2,3 or 4.........................................= 3 ?
Curve for negative-sequence time-overcurrent element 51QT
1=moderately inverse, 2=inverse, 3=very inverse, 4=extremely inverse