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P746/EN ST/G31 Settings
(ST) 4-
24
MiCOM P746
ST
Menu Text Default Setting Available Settings
Contact Test No Operation
No Operation, Apply
Test, Remove Test
When the ‘Apply Test’ command in this cell is issued the contacts set for operation (set to
‘1’) in the ‘Test Pattern’ cell change state. After the test has been applied the command text
on the LCD will change to ‘No Operation’ and the contacts will remain in the Test State until
reset issuing the ‘Remove Test’ command. The command text on the LCD will again revert
to ‘No Operation’ after the ‘Remove Test’ command has been issued.
Note: When the ‘Test Mode’ cell is set to ‘Enabled’ the ‘Relay O/P Status’ cell does not
show the current status of the output relays and hence can not be used to confirm
operation of the output relays. Therefore it will be necessary to monitor the state
of each contact in turn.
Test LEDs No Operation
No Operation
Apply Test
When the ‘Apply Test’ command in this cell is issued the eighteen user-programmable
LEDs will illuminate for approximately 2 seconds before they extinguish and the command
text on the LCD reverts to ‘No Operation’.
Red LED Status 000001000100000000
This cell is an eighteen bit binary string that indicates which of the user-programmable
LEDs on the relay are illuminated with the Red LED input active when accessing the relay
from a remote location, a ‘1’ indicating a particular LED is lit and a ‘0’ not lit.
Green LED Status 000001000100000000
This cell is an eighteen bit binary string that indicates which of the user-programmable
LEDs on the relay are illuminated with the Green LED input active when accessing the relay
from a remote location, a ‘1’ indicating a particular LED is lit and a ‘0’ not lit.
Test Zone none
None / Zone1 / Zone2 /
Zone 1 and Zone2
The Test Zone cell is used to block a zone for test. It disables the 50BF protection and block
all the tripping relays connected to the blocked zone(s). Alarm LED is lit.
DDB 31 - 0 00000000000000000000000000000000
Displays the status of DDB signals 0 – 31.
DDB 2047 - 2016 00000000000000000000000000000000
Displays the status of DDB signals 2047 – 2016.
1.3.8 Opto configuration
Setting Range
Menu Text Default Setting
Min. Max.
Step Size
OPTO CONFIG.
Global Nominal V 48/54V
24/27V, 30/34V, 48/54V, 110/125V,
220/250V, Custom
Sets the nominal battery voltage for all opto inputs by selecting one of the five standard
ratings in the Global Nominal V settings. If Custom is selected then each opto input can
individually be set to a nominal voltage value.
Opto Filter Ctrl 11111111111111111111111111111111
This menu is used to control the relay’s opto-isolated inputs L1 to L32. A ‘1’ indicates an
energized and operating relay, a ‘0’ indicates a de-energized
Opto Filter Ctrl2 11111111
Controls the next relay’s opto-isolated inputs (L33 to L40).