10.33
Date Code 20170927 Instruction Manual SEL-751 Relay
Analyzing Events
High-Impedance Fault (HIF) Event Reporting
High-Impedance Fault
Event History
The HIF event history gives you a quick look at recent relay activity. See
Figure 10.13 for a sample event history. The HIF event history contains the
following:
➤ Standard report header
➢ Relay and terminal identification
➢ Date and time of report
➤ Event reference number
➤ Event date and time
➤ Event type
➤ Downed Conductor
➤ Settings Group
The event types and downed conductor status in the event history are
determined in the same manner as in the event summary (see High-Impedance
Fault Event Summary on page 10.30). As shown in Figure 10.13, the event
history report indicates events stored in relay nonvolatile memory. The relay
places a blank row in the history report output; items that are above the blank
row are available for viewing (use the CEV HIF command). Items that are
=>>CSUM HIF <Enter>
"FID","0143"
"FID=SEL-751-X141-V0-Z001001-D20110315","08A3"
"REF_NUM","MONTH","DAY","YEAR","HOUR","MIN","SEC","MSEC","0D66"
10033,3,16,2011,15,57,17,900,"0588"
"EVENT","HIF PHASE","DOWNED CONDUCTOR","FREQUENCY","BREAKER","0F5A"
"HIF Fault","A,B","NO",59.99,"OPEN","086B"
"IARMS_PF","IBRMS_PF","ICRMS_PF","IARMS","IBRMS","ICRMS","0E6D"
28439.0,0.0,0.0,-24497.0,0.0,0.0,"063D"
"ISMA_PF","ISMB_PF","ISMC_PF","ISMA","ISMB","ISMC","0C81"
28443.0,0.0,0.0,-24493.0,0.0,0.0,"0634"
"SDIA_PF","SDIB_PF","SDIC_PF","SDIA","SDIB","SDIC","0C4B"
28440.0,0.0,0.0,-24496.0,0.0,0.0,"0634"
Where *_PF denotes pre-trigger analogs.
=>>
Figure 10.12 Sample Compressed ASCII HIF Summary
=>>HIS HIF <Enter>
SEL-751 Date: 03/17/2011 Time: 09:51:02.729
FEEDER RELAY Time Source: Internal
FID=SEL-751-X141-V0-Z001001-D20110315
# DATE TIME EVENT DOWNED CONDUCTOR GRP
10012 03/14/2011 10:09:48.011 HIF Fault A,B YES 1
10011 03/14/2011 10:07:47.950 HIF Fault A,B NO 1
10010 03/11/2011 14:14:56.033 HIF Fault A,B NO 1
10009 03/08/2011 16:43:28.151 HIF Ext. TRI NO 1
10008 03/08/2011 16:39:59.510 HIF Ext. TRI NO 1
10007 03/08/2011 16:37:58.913 HIF Ext. TRI NO 1
10006 03/08/2011 14:24:41.643 HIF Ext. TRI NO 1
10005 03/08/2011 14:19:57.743 HIF Ext. TRI NO 1
10004 03/08/2011 13:51:03.106 HIF Ext. TRI NO 1
10003 03/08/2011 13:48:48.230 HIF Ext. TRI NO 1
10002 03/08/2011 13:47:20.440 HIF Ext. TRI NO 1
10001 03/08/2011 13:44:20.023 HIF Ext. TRI NO 1
10000 03/08/2011 13:29:35.196 HIF Ext. TRI NO 1
=>>
Figure 10.13 Sample HIF Event History
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