Sel 551 - Page 151

6.5
Date Code 20110408 Instruction Manual SEL-551 Relay
Front-Panel Interface
Functions Unique to the Front-Panel Interface
Reclosing Relay Shot
Counter Screen
Use this screen to see the progression of the shot counter during reclosing
relay testing.
Access the reclosing relay shot counter screen via the {OTHER} pushbutton. The
following screen appears:
Scroll right with the right arrow button and select function
79. Upon selecting
function
79, the following screen appears (shown here with factory default
settings):
or
If the reclosing relay does not exist (see Reclosing Relay on page 3.22), the
following screen appears:
The corresponding text label settings (shown with factory default settings) are:
79LL = SET RECLOSURES (Last Shot Label-limited to 14 characters)
79SL = RECLOSE COUNT (Shot Counter Label-limited to 14
characters)
These text label settings are set with the SET T command or viewed with the
SHOWSET T command via the serial port [see Section 4: Setting the Relay
and SHO Command (Showset) on page 5.16].
The top numeral in the above example screen (SET RECLOSURES = 2)
corresponds to the last shot value, which is a function of the number of set
open intervals. There are two set open intervals in the factory default settings,
thus two reclosures (shots) are possible in a reclose sequence.
The bottom numeral in the above example screen [RECLOSE COUNT = 0
(or = 2)] corresponds to the present shot value. If the breaker is closed and the
reclosing relay is reset (RS LED on front panel is illuminated), RECLOSE
COUNT = 0. If the breaker is open and the reclosing relay is locked out after a
reclose sequence (LO LED on front panel is illuminated), RECLOSE
COUNT = 2.
OTHER ← →
DATE TIME 79 TAR
SET RECLOSURES=2
RECLOSE COUNT =0
SET RECLOSURES=2
RECLOSE COUNT =2
No Reclosing set