Schweitzer Engineering Laboratories SEL-751 - Figure 10.11 Sample HIF Event Summary Report; Table 10.5 CEV HIF Commands

10.30
SEL-751 Relay Instruction Manual Date Code 20170927
Analyzing Events
High-Impedance Fault (HIF) Event Reporting
the capture of pretrigger (prefault) data are fixed to 60 seconds (on a 60 Hz
system) regardless of the HIFLER setting value. You can view information
about a high-impedance fault event in one or more of the following forms:
➤ HIF event summary
➤ HIF event history
Event Numbering
Use the CEV HIF n command to access particular event reports; parameter n
indicates the order of the event report. The most recent event report is record
number one (1), the next most recent report is record number two (2), and so
on. In addition, events can be accessed by their unique reference number.
Reference numbers start at 10000 and increment with each event. When the
event report list is cleared, the reference number resets to 10000. Table 10.5
lists the CEV HIF commands.
High-Impedance Fault
Event Summary
You can retrieve a shortened version of stored high-impedance fault event as
HIF event summaries. These short-form reports present vital information
about a triggered event. See Figure 10.11 for a sample HIF event summary.
The event summary contains the following information:
➤ Standard report header
➢ Relay and terminal identification
➢ Event date and time
➤ Event type
➤ HIF Phase
➤ Event logs
➤ Downed Conductor
Table 10.5 CEV HIF Commands
Command Description
CEV HIF Returns the most recent compressed HIF event report
CEV HIF n Returns a particular n (n = record or reference number)
compressed HIF event report
=>>SUM HIF <Enter>
SEL-751 Date: 03/16/2011 Time: 15:57:17.900
FEEDER RELAY Time Source: Internal
Serial No = 000000000000000
FID=SEL-751-X141-V0-Z001001-D20110315
EVENT LOGS = 5
Event: HIF Fault HIF Phase: A,B
Downed Conductor: NO Freq: 59.99 Breaker: OPEN
Pre-trigger (A):
IARMS IBRMS ICRMS
28439.0 0.0 0.0
Post-trigger (A):
-24497.0 0.0 0.0
Pre-trigger (A):
ISMA ISMB ISMC SDIA SDIB SDIC
28443.0 0.0 0.0 28440.0 0.0 0.0
Post-trigger (A):
-24493.0 0.0 0.0 -24496.0 0.0 0.0
Figure 10.11 Sample HIF Event Summary Report