7.61
Date Code 20170927 Instruction Manual SEL-751 Relay
Communications
Communications Protocols
The size of each event report file is determined by the LER setting in effect at
the time the event is triggered.
Compressed SEL ASCII event report files are generated, when requested, by
storing the appropriate command response shown in Table 7 . 59.
Oscillography files are generated at the time the event is triggered (see Event
Reporting on page 10.2). Higher resolution oscillography is available with
SEL Compressed ASCII 32 sample/cycle raw event reports and binary
COMTRADE files.
COMTRADE event files are available to read as a batch. See Batch File
Access on page 7.63.
HR_nnnnn.* (Read-Only)
The three files HR_nnnnn.CFG, HR_nnnnn.DAT, and HR_nnnnn.HDR shown
in Table 7 . 59 are used to create an event report that conforms to the
COMTRADE standard. The event is an unfiltered (raw) 32 samples/cycle
event. The field, nnnnn, corresponds to the unique event identification number
displayed by the HIS command. For details on event reports see Section 10:
Analyzing Events.
HF_nnnnn.* (Read-Only)
The three files HF_nnnnn.CFG, HF_nnnnn.DAT, and HF_nnnnn.HDR shown
in Table 7 . 59 are used to create a high-impedance event report that conforms
to the COMTRADE standard. The field, nnnnn, corresponds to the unique
event identification number displayed by the HIS HIF command. For details
on event reports see Section 10: Analyzing Events.
Table 7.59 Event Directory Files
File Name Description
Equivalent Command
Response
CHISTORY.TXT
a
Compressed ASCII History Report CHI
CHISTORY_HIF.TXT
a, b
Compressed HIF ASCII History Report CHI HIF
HISTORY. TXT
a
History Report HIS
HISTORY_HIF.TXT
a, c
HIF History Report HIS HIF
C4_nnnnn.CEV Compressed 4-samples/cycle ASCII filtered event report; event ID
number = nnnnn
CEV nnnnn
CHF_nnnnn.CEV
c
Compressed HIF ASCII event report CEV HIF nnnnn
CR_nnnnn.CEV Compressed 128-samples/cycle ASCII raw event report; event ID
number = nnnnn
CEV R nnnnn
HF_nnnnn.CFG
b, c
HIF COMTRADE configuration file; event ID number = nnnnn N/A
HF_nnnnn.DAT
b, c
HIF COMTRADE binary data file; event ID number = nnnnn N/A
HF_nnnnn.HDR
b,c
HIF COMTRADE header file; event ID number = nnnnn N/A
HR_nnnnn.CFG
c
COMTRADE configuration file; event ID number = nnnnn N/A
HR_nnnnn.DAT
c
COMTRADE binary data file; event ID number = nnnnn N/A
HR_nnnnn.HDR
c
COMTRADE header file; event ID number = nnnnn N/A
a
Also available in the Reports director for convenience.
b
Available in the units ordered with Arc Sense technology (High-Impedance Fault Detection).
c
Also available in the COMTRADE directory for MMS only.
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