Sel 411L - Triggering Data Captures and Event Reports

P.8.4
SEL-411L Relay Protection Manual Date Code 20151029
Oscillography, Events, and SER
Triggering Data Captures and Event Reports
Triggering Data Captures and Event Reports
The relay displays power system data from oscillograms, event reports, event
summaries, event histories, and SER data. All of these features, except the
SER, require sampled or filtered data from the power system, and are
triggered both internally and externally depending on the event trigger that
you program in the relay.
Use an event trigger to initiate capturing power system data. High-resolution
raw data oscillography, traveling wave data oscillography, and event reports
use the same triggering methods. The trigger for data captures comes from
three possible sources:
➤ Relay Word bit TRIP assertions
➤ SELOGIC
®
control equation ER (Event Report Trigger)
➤ TRI command
In previous SEL relays, the PUL command initiated event recording. If you
want the PUL command to initiate data capture, add the Relay Word bit
TESTPUL to the SEL
OGIC control equation ER.
Relay Word Bit TRIP
If Relay Word bit TRIP asserts, the relay automatically generates a data
capture event trigger on the rising edge of the TRIP Relay Word bit state
change. In every instance, TRIP causes the relay to begin recording data. You
therefore do not have to enter any condition that causes a trip in the ER
SEL
OGIC control equation. For information on Relay Word bit TRIP.
SELOGIC Control
Equation ER
Program the SELOGIC control equation ER to trigger high-resolution raw data
oscillography, traveling wave data oscillography, and standard event reports
for conditions other than TRIP conditions. When ER asserts, the relay begins
recording data if the relay is not already capturing data initiated by another
trigger.
EXAMPLE 8.1 Triggering Event Report/Data Capture Using the ER
SEL
OGIC Control Equation
This example shows how the elements in the ER SEL
OGIC control
equation initiate relay data capture.
An example of a factory default setting for Group setting SEL
OGIC
control equation ER is
ER := R_TRIG Z2P OR R_TRIG Z2G OR R_TRIG 51S01 OR R_TRIG Z3P OR
R_TRIG Z3G
Event Report Trigger Equation (SELOGIC Equation)
The element transitions in this setting are from the following Relay
Word bits:
➤ Z2P, Z3P: Zone 2 phase distance element, Zone 3 phase
distance element
➤ Z2G, Z3G: Zone 2 ground distance element, Zone 3 ground
distance element
➤ 51S01: Instantaneous output of Inverse-Time Overcurrent
Element 1
The rising-edge operator, R_TRIG, occurs in front of each of the
elements in the factory default ER equation. Rising-edge operators
are especially useful for generating an event report at fault inception.
The triggering element causes ER to assert, then clears the way for
other elements to assert ER because the relay uses only the
beginning of a long element assertion. The starting element in a
continuously occurring fault does not mask other possible element
triggers. This allows another rising-edge sensitive element to