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4.92
SEL-787 Relay
Instruction Manual
Date Code 20081022
Protection and Logic Functions
Port Settings (SET P Command)
Data Reset
The RSTTRGT setting resets the trip output and front-panel
TRIP
LED,
provided there is no trip condition present. See
for more details.
The RSTENRGY and RSTMXMN settings reset the Energy and Max/Min
Metering values respectively. You should assign a contact input (for example,
RSTTRGT := IN401) to each of these settings if you want remote reset. The
RSTDEM and RSTPKDEM settings reset demand and peak-demand. See
for the demand current logic diagram.
Access Control
The DSABLSET setting defines conditions for disabling all setting changes
from the front-panel interface. To disable setting changes from the front-panel
interface, assign, for example, a contact input (e.g., DSABLSET := IN402) to
the DSABLSET setting. When Relay Word bit DSABLSET asserts, you can
view the device settings from the front-panel interface, but you can only
change settings using serial port commands.
shows the settings
prompt, setting range, and factory default settings.
Port Settings (SET P Command)
The SEL-787 provides settings that allow you to configure the parameters for
the communications ports. See
for a detailed
description of port connections. On the base unit:
Port F
(front panel) is an
EIA-232 port;
Port 1
is an optional Ethernet port(s);
Port 2
is a fiber-optic serial
port; and
Port 3
(rear) is optionally an EIA-232 or EIA-485 port. On the
optional communications card, you can select
Port 4
as either EIA-485 or
EIA-232 (not both) with the COMMINF setting. See
through
for the serial port settings, also see appropriate Appendix for
additional information on the protocol (DNP, MODBUS, IEC-61850,
DeviceNet, Synchrophasors, and M
IRRORED
B
IT
) of interest.
Table 4.40
Data Reset Setting
Setting Prompt
Setting Range
Setting Name :=
Factory Default
RESET TARGETS
SEL
OGIC
RSTTRGT := 0
RESET ENERGY
SEL
OGIC
RSTENRGY := 0
RESET MAX/MIN
SEL
OGIC
RSTMXMN := 0
RESET DEMAND
SEL
OGIC
RSTDEM := 0
RESET PK DEMAND
SEL
OGIC
RSTPKDEM := 0
Table 4.41
Setting Change Disable Setting
Setting Prompt
Setting Range
Setting Name :=
Factory Default
DISABLE SETTINGS
SEL
OGIC
DSABLSET := 0
NOTE:
DISABLSET does not disable
the setting changes from the serial
ports.
Summary of Contents for SEL-787
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