Schweitzer Engineering SEL-351P - Fast Curve Operation When Reclosing Is Defeated

1-14 Factory-Set Logic Date Code 990215
SEL-351P Manual Técnico
The note in Figure SECTION 1: .6 refers to Figure SECTION 1: .15 – the logic that controls the
Fast curve - phase (phase time-overcurrent element 51P1T). In this example, Fast curve - phase
is enabled for the first two trips operations.
Fast curve - ground (
Figure SECTION 1: .7) operates similarly to the Fast curve - phase just
discussed (
Figure SECTION 1: .6).
Fast Curve Operation When Reclosing Is Defeated
If reclosing is defeated via setting (e.g., all Operations to lockout ≤ 1), then all the following
reclosing-related Relay Word bits default to logical 0 (the reclosing relay is nonexistent):
SH0, SH1, SH2, SH3, SH4 (shot counter states)
79RS, 79CY, 79LO (reclosing relay states)
The logic at the top of
Figure SECTION 1: .6 and Figure SECTION 1: .7 enables set phase and
ground fast curves, respectively, when reclosing is defeated.