7.16
SEL-387-0, -5, -6 Relay Instruction Manual Date Code 20170601
Serial Port Communications and Commands
SEL ASCII Protocol Details
BRE W n (Breaker Wear Pre-Set)
Access Levels B, 2
This command is used to pre-set the amount of contact wear for Breaker n, on
the assumption that the breaker has already experienced some fault duty
before the relay is installed. The command prompts for percentage wear for
each pole of the breaker. These must be entered as integer values, from 0 to
100 percent. Values over 100 will not be accepted. The data are stored in
EEPROM and are nonvolatile. The procedure is shown below.
=>>BRE W 1 <Enter>
Breaker Wear Percent Preload
Breaker 1: Pole 1 % = 0 ? 15
Breaker 1: Pole 2 % = 0 ? 20
Breaker 1: Pole 3 % = 0 ? 10
Are you sure (Y/N) ? Y <Enter>
=>>
After entering the values, use the BRE command to verify that the data have
been accepted properly.
CAL (Calibration Access Level) Command
Access Level 2
The CALIBRATION command is used to enter the calibration access level in
the relay. Normal relay operation does not require access to this level. The
only user command that may be necessary to use from this level is the R_S
command, which resets factory default settings. Do not access this level unless
instructed by the factory or using the R_S command. The relay is calibrated at
the factory and will not need field calibration. Contact the factory if you
suspect the relay is not calibrated.
CEV (Compressed Event)
Access Levels 1, B, 2
The SEL-5601 Analytic Assistant software is available for graphical analysis
of event reports. The CEV command is a compressed (no formatting) version
of the EVE command. Use the CEV command to download events for the
SEL-5601 Analytic Assistant Program.
The CEV command can generate both winding and differential reports.
The command syntax is CEV [DIF R][n Sx Ly[-[w]] C]. All parameters are
optional. Enter them in any order.
DIF specifies generation of the differential element report in compressed
form. Otherwise, the winding report will be produced.
R specifies “raw,” or unfiltered analog data, in a format [1.5 cycles + Ly].
Letter n specifies the event number.
Sx specifies samples per cycle. The x value can be 4, 8, 16, 32, or 64 for
raw reports (default is 16) or 4, 8 for filtered reports (default is 4). Digital
elements will be displayed at the resolution specified by Sx, up to a
maximum of eight samples per cycle.
Ly specifies the report length in cycles. The y value can be from 1 to the
LER setting. Default is 15 cycles. Ly- specifies reporting from cycle y to
the end of the report. Ly-w specifies reporting from cycle y to cycle w.
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