4.20
SEL-400 Series Relays Instruction Manual Date Code 20171006
Front-Panel Operations
Front-Panel Menus and Screens
When you first enter this search menu, the block cursor is at the beginning of the
element name field and the highlight box in the alphanumeric field is around the
letter A. Use the navigation pushbuttons to move through the alphanumeric char-
acters. If the highlight is on one of the characters, pressing ENT enters the charac-
ter at the block cursor location in the element name field. Next, the block cursor
moves automatically to the character placeholder to the right. If the block cursor
was already at the first character position on the left, the block cursor remains at
the end of the name field. To backspace the cursor in the element name field,
move the highlight to
BACKSPACE and press ENT. When you have finished entering
an element name, move the highlight to
ACCEPT and press ENT. At any time, press-
ing ESC returns the display to the
RELAY ELEMENTS screen.
If the highlight is on
ACCEPT, the relay finds the matching relay element when you
press ENT. The relay first searches for alias names, seeking an exact match. If the
relay does not find an exact alias name match, it searches for an exact primitive
name match. If there is no exact primitive name match, the relay initiates a partial
alias name string search, followed by a partial primitive name string search. If the
relay finds no match, the screen displays an error message and stays in the
ELE-
MENT SEARCH
screen. If the relay finds a match, the screen displays the element
row containing the matching element.
Local Control
The relay provides great flexibility in power system control through the LOCAL
CONTROL
menus. You can use the front-panel LOCAL CONTROL menus to perform
these relay functions:
➤ Trip and close circuit breakers (password required)
➤ Assert, deassert, and pulse relay control outputs to command station
control actions
➤ Test relay outputs (password required)
In the first
LOCAL CONTROL submenu of Figure 4.24, you can choose BREAKER
CONTROL
, LOCAL BITS CONTROL, or OUTPUT TESTING. You must install the circuit
breaker control enable jumper to enable circuit breaker control and output testing
capability. The submenu will not display the
--BREAKER CONTROL-- option and
the
--OUTPUT TESTING-- option if the breaker jumper is not installed. (The relay
checks the status of the breaker jumper whenever you activate the front-panel set-
tings and at power-up.) If the breaker jumper is not installed, and there are no
local bits enabled, the relay displays an information message when you attempt
to enter
LOCAL CONTROL and the screen returns to the MAIN MENU after a short delay.
Local bit names that you have programmed (see Example 4.4) appear in the local
control bit names field between -
-BREAKER CONTROL-- and --OUTPUT TESTING--,
as shown in Figure 4.24. Use the Up Arrow and Down Arrow pushbuttons to high-
light the local control action you want to perform. Pressing ENT takes you to the
specific
LOCAL CONTROL screen.
Figure 4.24 LOCAL CONTROL Initial Menu
LOCAL CONTROL
--BREAKER CONTROL--
Enable Bus Switching
North Bus MOD
South Bus MOD
Bus Tie Interlock
Alternate Settings 3
--OUTPUT TESTING--
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