Schweitzer Engineering Laboratories SEL-251 - Page 83

Date Code 970103 Communications 3-25
SEL-251, -2, -3 Instruction Manual
51QRS : Dly Reset Y/N?..........................................= N ?
Time delay reset for negative-sequence time-overcurrent element 51QT?
(If N, 51QT resets 1 cycle after 51QP drops out)
50NL : A sec..........................................................= 19.99 ? 0.125-100.00
Pickup for ground/residual definite-time overcurrent element 50NLT
Setting range dependent on 51NP setting.
50NLT : Dly, cyc......................................................= 2 ? 0-16000
Time delay for ground/residual definite-time overcurrent element 50NLT
50NH : A sec..........................................................= 100.00 ? 0.125-100.00
Pickup for ground/residual instantaneous overcurrent element 50NH
Setting range dependent on 51NP setting.
51NP : A sec..........................................................= 1.50 ? 0.25-12.00
Pickup for ground/residual time-overcurrent element 51NT
51NTD : Time Dial...................................................= 3.00 ? 0.50-15.00
Time dial for ground/residual time-overcurrent element 51NT
51NC : Curve 1,2,3 or 4.........................................= 2 ?
Curve for ground/residual time-overcurrent element 51NT
1=moderately inverse, 2=inverse, 3=very inverse, 4=extremely inverse
51NRS : Dly Reset Y/N?..........................................= N ?
Time delay reset for ground/residual time-overcurrent element 51NT?
(If N, 51NT resets 1 cycle after 51NP drops out)
50L : A sec..........................................................= 99.99 ? 0.50-100.00
Pickup for phase definite-time overcurrent element 50LT
50LT : Dly, cyc......................................................= 0 ? 0-16000
Time delay for phase definite-time overcurrent element 50LT
50H : A sec..........................................................= 40.00 ? 0.50-100.00
Pickup for phase instantaneous overcurrent element 50H
51P : A sec..........................................................= 6.00 ? 1.00-12.00
Pickup for phase time-overcurrent element 51T
51TD : Time Dial...................................................= 6.00 ? 0.50-15.00
Time dial for phase time-overcurrent element 51T
51C : Curve 1,2,3 or 4.........................................= 3 ?
Curve for phase time-overcurrent element 51T
1=moderately inverse, 2=inverse, 3=very inverse, 4=extremely inverse
51RS : Dly Reset Y/N?..........................................= N ?
Time delay reset for phase time-overcurrent element 51NT?
(If N, 51T resets 1 cycle after 51P drops out)