P54x/EN OP/La4 Operation
(OP) 5-166
MiCOM P543, P544, P545 & P546
OP
4.6.1 CB control using hotkeys (P543/P545)
The hotkeys allow direct access to manual trip and close commands without the need to
enter the SYSTEM DATA column. Red or green color coding can be applied when used in
CB control applications.
IF <<TRIP>> or <<CLOSE>> is selected the user is prompted to confirm the execution of the
relevant command. If a trip is executed a screen with the CB status will be displayed once
the command has been completed. If a close is executed a screen with a timing bar will
appear while the command is being executed. This screen has the option to cancel or
restart the close procedure. The timer used is taken from the manual close delay timer
setting in the CB Control menu. When the command has been executed, a screen
confirming the present status of the circuit breaker is displayed. The user is then prompted
to select the next appropriate command or exit - this will return to the default relay screen.
If no keys are pressed for a period of 25 seconds while waiting for the command
confirmation, the relay will revert to showing the CB Status. If no key presses are made for a
period of 25 seconds while displaying the CB status screen, the relay will revert to the default
relay screen. Figure 107 shows the hotkey menu associated
with CB control functionality.
To avoid accidental operation of the trip and close functionality, the hotkey CB control
commands will be disabled for 10 seconds after exiting the hotkey menu.
CLOSED
TRIP
MiCOM
P54x
HOTKEY
CB CTRL
<CB STATUS>
EXECUTE
CONFIRM
CLOSE
<CB STATUS>
Default Display
EXIT
CANCEL
EXIT
EXECUTE
CB TRIP OPEN CB CLOSE
CONFIRMCANCEL
EXECUTE CLOSE
RESTARTCANCEL
30 SECS
CB Closed CB Open
Hotkey Menu
P2246ENb
Figure 107 CB control hotkey menu
4.6.2 CB control using function keys (P54
3/P545)
The function keys allow direct control of the circuit breaker if programmed to do this in PSL.
local tripping and closing, via relay opto-isolated inputs must be set in the CB Control menu
‘CB control by’ cell to enable this functionality. All CB manual control settings and conditions
will apply for manual tripping and closing via function keys.
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