Alstom MiCOM P846, Техническое руководство

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P846/EN ST/D Settings
(ST) 4-14
MiCOM P846
ST
1.3.7 Commissioning tests
There are menu cells which allow the status of the opto-isolated inputs, output relay
contacts, internal digital data bus (DDB) signals and user-programmable LEDs to be
monitored. Additionally there are cells to test the operation of the output contacts, user-
programmable LEDs and, where available, the auto-reclose cycles.
Menu Text Default Setting Available Settings
COMMISSION TESTS
Opto I/P Status 0000000000000000
This menu cell displays the status of the relay’s opto-isolated inputs as a binary string, a ‘1’
indicating an energized opto-isolated input and a ‘0’ a de-energized one
Relay O/P Status 0000000000000000
This menu cell displays the status of the digital data bus (DDB) signals that result in
energization of the output relays as a binary string, a ‘1’ indicating an operated state and
‘0’ a non-operated state.
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 Port Status 00000000
This menu cell displays the status of the eight digital data bus (DDB) signals that have
been allocated in the ‘Monitor Bit’ cells.
LED Status 000000000000000000
This cell is an eighteen bit binary string that indicates which of the user-programmable
LEDs on the relay are illuminated with the input active when accessing the relay from a
remote location, a ‘1’ indicating a particular LED is lit and a ‘0’ not lit.
Monitor Bit 1 64 (LED 1)
0 to 511
See PSL chapter for
details of digital data
bus signals
The eight ‘Monitor Bit’ cells allow the user to select the status of which digital data bus
signals can be observed in the ‘Test Port Status’ cell or via the monitor/download port.
Monitor Bit 8 71 (LED 8) 0 to 511
The eight ‘Monitor Bit’ cells allow the user to select the status of which digital data bus
signals can be observed in the ‘Test Port Status’ cell or via the monitor/download port.
Test Mode Disabled
Disabled, Test Mode,
Contacts Blocked
The Test Mode menu cell is used to allow secondary injection testing to be performed on
the relay without operation of the trip contacts. It also enables a facility to directly test the
output contacts by applying menu controlled test signals. To select test mode the Test
Mode menu cell should be set to ‘Test Mode’, which takes the relay out of service and
blocks operation of output contacts and maintenance, counters. It also causes an alarm
condition to be recorded and the yellow ‘Out of Service’ LED to illuminate and an alarm
message ‘Prot’n. Disabled’ is given.
To enable testing of output contacts the Test Mode cell should be set to Contacts Blocked.
This blocks the protection from operating the contacts and enables the test pattern and
contact test functions which can be used to manually operate the output contacts. Once
testing is complete the cell must be set back to ‘Disabled’ to restore the relay back to
service.