11.7
Date Code 20080213 Instruction Manual SEL-351A Relay
Front-Panel Interface (Only on Models With LCD)
Functions Unique to the Front-Panel Interface
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.
Reclosing Relay Shot Counter Screen Operation (With Example Settings)
Group settings used for the following example:
E79 = 2
79OI1 = 30 cycles
79OI2 = 600 cycles
With the breaker closed and the reclosing relay in the reset state (front-panel
RS LED illuminated), the reclosing relay shot counter screen appears as:
The relay trips the breaker open, and the reclosing relay goes to the reclose
cycle state (front-panel CY LED illuminates). The reclosing relay shot counter
screen still appears as:
The first open interval (79OI1 = 30) times out, the shot counter increments
from 0 to 1, and the relay recloses the breaker. The reclosing relay shot
counter screen shows the incremented shot counter:
The relay trips the breaker open again. The reclosing relay shot counter screen
still appears as:
The second open interval (79OI2 = 600) times out, the shot counter
increments from 1 to 2, and the relay recloses the breaker. The reclosing relay
shot counter screen shows the incremented shot counter:
SET RECLOSURES=2
RECLOSE COUNT =0
SET RECLOSURES=2
RECLOSE COUNT =0
SET RECLOSURES=2
RECLOSE COUNT =1
SET RECLOSURES=2
RECLOSE COUNT =1
SET RECLOSURES=2
RECLOSE COUNT =2
Courtesy of NationalSwitchgear.com
To Next Page
Loading...