701 Motor Protection Relay Date Code 20010719
SEL
OGIC
®
Control Equations & Relay Logic
Event Triggering SEL
OGIC Control Equation
B.28
Event Triggering SELOGIC Control Equation
The event report trigger SELOGIC control equation, ER, triggers standard event
reports for conditions other than trip conditions. When setting ER sees a logical 0 to
logical 1 transition, it generates an event report (if the relay is not already generating a
report that encompasses the new transition). The factory setting shown in Table B.3 on
page B.9 includes a rising-edge operator [/] in front of each of the alarm elements. This
is used to trigger an event report at alarm inception. Falling-edge operators are used to
generate an event report at frequency element dropout, when the system frequency has
stabilized at or near the nominal frequency.
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