Date Code 20080110 Front-Panel Operation 8-19
SEL-387E Instruction Manual
Traditional Indicating Panel Lights Replaced with Rotating Default Display
The indicating panel lights are not needed if the rotating default display feature in the SEL-387E
Relay is used.
There are 16 of these default displays available in the SEL-387E Relay. Referred to as Display
Points, each default display has available two complementary screens (e.g., BREAKER
CLOSED and BREAKER OPEN). The settings for these Display Points are located in the
FRONT PANEL area of the GLOBAL settings. They are viewable and settable from the serial
ports, via the SHO G or SET G commands. Because they include SEL
OGIC
control equations
and variable text, they cannot be accessed from the front panel.
General Operation of Rotating Default Display Settings
SEL
OGIC
control equations display point setting DPn (n = 1 through 16) controls the display of
corresponding, complementary text settings:
DPn_1 (displayed when DPn = logical 1)
DPn_0 (displayed when DPn = logical 0)
Make each text setting through the serial port using the command SET G. View these text
settings using the serial port command SHO G. These text settings are displayed in pairs on the
SEL-387E Relay front-panel display on a two-second rotation. They must not be longer than 16
characters. Any active Display Points take precedence as the default display over the standard
scroll through the winding current values. Relay-generated messages, however, take precedence
over the Display Points.
Below are some examples of how the Display Points may be used.
Circuit Breaker Status Indication Example
Make SEL
OGIC
control equations display point setting DP2:
DP2 = IN102 (IN102 is assigned to the 52A2 function for Breaker 2)
Make corresponding, complementary text settings:
DP2_1 = BREAKER 2 CLOSED
DP2_0 = BREAKER 2 OPEN
Display point setting DP2 controls the display of the text settings.
Circuit Breaker Closed
The optoisolated input IN102 is energized when the 52a circuit breaker auxiliary contact is
closed, resulting in:
DP2 = IN102 = logical 1
This results in the display of corresponding text setting DP2_1 on the front-panel display:
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