Schweitzer Engineering Laboratories SEL-311C - Standard 15;30;60;180-Cycle Event Reports; Event Report Length (Settings LER and PRE); Standard Event Report Triggering

12.2
SEL-311C Relay Instruction Manual Date Code 20060320
Standard Event Reports and SER
Standard 15/30/60/180-Cycle Event Reports
Standard 15/30/60/180-Cycle Event Reports
See Figure 12.3 for an example event report.
Event Report
Length (Settings
LER and PRE)
The SEL-311C provides user-programmable event report length and pre-fault
length. Event report length is 15, 30, 60 or 180 cycles. Pre-fault length ranges
from 1 to 179 cycles. Pre-fault length is the first part of the event report that
precedes the event report triggering point.
Set the event report length with the SET G LER setting. Set the pre-fault
length with the SET G PRE setting. See the SET G command in Table 9.1 and
Global Settings (Serial Port Command SET G and Front Panel) on
page SET.22 for instructions on setting the LER and PRE settings.
Changing the LER setting erases all events stored in nonvolatile memory.
Changing the PRE setting has no effect on the nonvolatile reports.
Standard Event
Report Triggering
The relay triggers (generates) a standard event report when any of the
following occur:
➤ Relay Word bit TRIP asserts
➤ Programmable SELOGIC
®
control equation setting ER asserts
➤ TRI (Trigger Event Reports) serial port command executed
➤ Output contacts OUT101–OUT107 (Models 311C00x and
311C01x) pulsed via the serial port or front-panel PUL (Pulse
output contact) command
Relay Word Bit TRIP
Refer to Figure 5.1. If Relay Word bit TRIP asserts to logical 1, an event
report is automatically generated. Any trip condition that asserts in setting TR
causes the TRIP Relay Word bit to assert immediately. The Relay Word bit
TRIP asserts, and an event report is automatically generated. Any condition
that causes a trip does not have to be entered in SEL
OGIC control equation
setting ER.
Relay Word bit TRIP (in Figure 5.1) is usually assigned to an output contact
for tripping a circuit breaker (e.g., SEL
OGIC control equation setting OUT101
= TRIP).
Programmable SELOGIC Control Equation Setting ER
The programmable SELOGIC control equation event report trigger setting ER
is set to trigger 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 SEL-311C is not already generating a report that encompasses
the new transition). The factory setting is:
ER = /M2P + /Z2G + /51G + /51Q + /50P1 + /LOP
NOTE: Figure 12.3 is on multiple
pages.