7.12
SEL-387-0, -5, -6 Relay Instruction Manual Date Code 20170601
Serial Port Communications and Commands
SEL ASCII Protocol Details
Many commands can be executed from Access Level 1 for viewing relay
information. The 2AC command allows the relay to go to Access Level 2. The
BAC command allows the relay to go to Access Level B. The 2AC command
allows the relay to go to Access Level 2.
Access Level B (Breaker Level)
After issuing the BAC command and entering the password, if it is required
[see PAS (Passwords) for default factory passwords], the relay pulses the
ALARM contact and is in Access Level B (breaker access level). The Access
Level B prompt appears (
==>).
Many commands can be executed from Access Level B for viewing relay
information, and controlling the breaker. While in Access Level B, any of the
commands available in the lower Access Levels 0 and 1 can be executed.
Access Level 2
After issuing the 2AC command and entering the password, if it is required
[see
PAS (Passwords) for default factory passwords], the relay pulses the
ALARM contact and is in Access Level 2. The Access Level 2 prompt appears
(
=>>).
This is the highest access level. All commands listed in this manual, for any
access level, can be executed from Access Level 2 for viewing relay
information, controlling the breaker, and changing settings. Firmware
upgrades to Flash memory (see Appendix B: SEL-300 Series Relays
Firmware Upgrade Instructions) are also performed from this level.
Access Level C
The CAL (Calibration Access Level) 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.
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