7.24
SEL-387-0, -5, -6 Relay Instruction Manual Date Code 20170601
Serial Port Communications and Commands
SEL ASCII Protocol Details
at least one special character, number, lower-case letter, and upper-case
letter. A change in password is recommended.
=>>
PUL n (Pulse)
Access Levels B, 2
The PULSE n k command asserts the selected output contact n for k seconds.
The k parameter is optional. If k is not specified, the output contact is pulsed
for 1 second. Main board breaker jumper JMP6B must be in place. After
issuing the PULSE command, the relay asks for confirmation of the
operation, and then asks if you are sure. An invalid output contact name or
incorrect k value produces an error message.
Parameter n can be any existing output contact element name such as OUT107.
Parameter k must be a number ranging from 1 to 30 seconds.
=>>PUL OUT107 3 <Enter>
Pulse contact OUT107 for 3 second(s) (Y/N) ? Y <Enter>
Are you sure (Y/N) ? Y <Enter>
=>>
QUI (Quit)
Access Levels 0, 1, B, 2
The QUIT command returns the relay to Access Level 0 from Level 1, B,
or 2. The command displays the relay settings RID, TID, date, and time of
QUIT command execution.
Use the QUI command when you finish communicating with the relay to
prevent unauthorized access. The relay automatically returns to Access
Level 0 after a certain inactivity time dependent on the SET P setting T_OUT.
==>QUI <Enter>
XFMR 1 Date: 02/01/93 Time: 15:15:32.161
STATION A
=
RES (RESET51-Reset Inverse-Time O/C Elements)
Access Level 2
The RESET51 command clears the inverse-time overcurrent element
accumulators (phase, negative-sequence, and residual) for all four windings. It
also clears the four combined overcurrent phase and residual inverse-time
elements. This command is useful in testing of the inverse-time elements,
because it mimics the action of immediately returning an electromechanical
disk to the starting position. This command can save time in waiting for some
units to reset according to their electromechanical reset equations in Section 3:
Differential, Restricted Earth Fault, Thermal, and Overcurrent Elements.
The relay will ask
Reset 51 Elements (Y/N) ? when given the RES
command. If
No, it will abort the command. If Yes, it will respond All Time-
Overcurrent Element Accumulators Cleared
. This command is not likely
to have much use in normal in-service relay operation.
NOTE: The PUL command is useful
during testing to verify operation of
output contacts, but it should not be
used while the relay is in service.
During the entire time the specified
output contact is being pulsed, all
other output contacts are frozen in
their existing state and are not
permitted to change. This could
prevent a trip or other critical output
from being issued during the specified
PUL time interval.
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