Touchscreen Display - Schweitzer Engineering Laboratories SEL-787-2 Manual

18
an in-zone event, the currents required to feed this exter-
nal fault can cause great stress on the apparatus inside the
differential protection zone. Through-fault currents can
cause transformer winding displacement, leading to
mechanical damage and increased transformer thermal
wear. An SEL-787 through-fault event monitor gathers
current level, duration, and date/time for each through
fault. The monitor also calculates a simple I
latively stores these data per phase. Use through-fault
event data to schedule proactive transformer bank main-
tenance and to help justify through-fault mitigation
efforts. Apply the accumulated alarm capability of the
relay to indicate excess through-fault current (I
time.
IEC 61850 Test Mode
Test mode allows you to test an in-service relay without
operating control output contacts. Test mode includes
five different modes.

Touchscreen Display

You can order the SEL-787 Transformer Protection
Relay with an optional touchscreen display (5-inch,
color, 800 x 480 pixels). The touchscreen display makes
relay data metering, monitoring, and control quick and
efficient. The touchscreen display option in the SEL-787
features a straightforward application-driven control
structure and includes intuitive and graphical screen
designs.
The touchscreen display allows you to:
➤
View and control bay screens
➤
Access metering and monitoring data
➤
Inspect targets
➤
View event history, summary data, and SER informa-
tion
➤
View relay status and configuration
➤
Control relay operations
➤
View and edit settings
➤
Enable the rotating display
➤
Program control pushbuttons to jump to a specific
screen
You can navigate the touchscreen by tapping the folders
and applications. The folders and applications of the
Home screen are shown in Figure 20. Folders and appli-
cations are labeled according to functionality. Additional
folder and application screens for the SEL-787 touch-
screen display option can be seen in Figure 21 through
Figure 30.
SEL-787-2, -3, -4 Data Sheet
On: In On mode, the relay operates as normal; it reports
IEC 61850 Mode/Behavior status as On and processes all
inputs and outputs as normal. If the quality of the sub-
scribed GOOSE messages satisfies the GOOSE process-
ing, the relay processes the received GOOSE messages
as valid.
Blocked: This mode is similar to On mode, except that
2
t and cumu-
the device does not trip any physical contact output.
Test: In Test mode, the relay processes valid incoming
test signals and normal messages and operates physical
contact outputs, if the outputs are triggered.
2
Test/Blocked: This is similar to Test mode, except that
t) over
the device does not trip any physical contact outputs.
Off: The device does not process any incoming data or
control commands (except commands to change the
mode). All protection logic is disabled and all data qual-
ity is marked as invalid.
Figure 20 Home (Default FPHOME Screen)
Bay Screens Application
The SEL-787 with the touchscreen display option pro-
vides you with the ability to design bay configuration
screens to meet your system needs. The bay configura-
tion can be displayed as an SLD on the touchscreen. You
can create as many as 5 bay screens with as many as
4 controllable breakers, 16 controllable 2-position
Schweitzer Engineering Laboratories, Inc.