Date Code 20001006 Front-Panel Interface 11-5
SEL-351 Instruction Manual
FUNCTIONS UNIQUE TO THE FRONT-PANEL INTERFACE
Two front-panel primary functions do not have serial port command equivalents. These are:
• Reclosing relay shot counter screen (accessed via the OTHER pushbutton)
• Local control (accessed via the CNTRL pushbutton)
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:
DATE TIME 79
TAR BRK_MON
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):
SET RECLOSURES=2
RECLOSE COUNT =0
If the reclosing relay doesn’t exist (see Reclosing Relay in Section 6: Close and Reclose Logic),
the following screen appears:
No Reclosing set
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 9: Setting the Relay and SHO Command (Show/View
Settings) in Section 10: Serial Port Communications and Commands].
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.
(or = 2)
Courtesy of NationalSwitchgear.com
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