Alstom MiCOM P846, Техническое руководство

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P846/EN CM/D Commissioning
(CM) 10-14
MiCOM P846
CM
5.2.3.2 Without an IRIG-B signal
If the time and date is not being maintained by an IRIG-B signal, ensure that cell
[0804: IRIG-B Sync.] is set to ‘Disabled’.
Set the date and time to the correct local time and date using cell [0801: DATE and TIME,
Date/Time].
In the event of the auxiliary supply failing, with a battery fitted in the compartment behind the
bottom access cover, the time and date will be maintained. Therefore when the auxiliary
supply is restored the time and date will be correct and not need to be set again.
To test this, remove the auxiliary supply from the relay for approximately 30 seconds. On
re-energization, the time in cell [0801: DATE and TIME, Date/Time] should be correct.
5.2.4 Light emitting diodes (LEDs)
On power up the green LED should have illuminated and stayed on indicating that the relay
is healthy. The relay has non-volatile memory which remembers the state (on or off) of the
alarm, trip and, if configured to latch, user-programmable LED indicators when the relay was
last energized from an auxiliary supply. Therefore these indicators may also illuminate when
the auxiliary supply is applied.
If any of these LEDs are on then they should be reset before proceeding with further testing.
If the LEDs successfully reset (the LED goes out), there is no testing required for that LED
because it is known to be operational.
Note: It is likely that alarms related to the communications channels will not
reset at this stage.
5.2.4.1 Testing the alarm and out of service LEDs
The alarm and out of service LEDs can be tested using the COMMISSION TESTS menu
column. Set cell [0F0D: COMMISSION TESTS, Test Mode] to ‘Contacts Blocked’. Check
that the out of service LED illuminates continuously and the alarm LED flashes.
It is not necessary to return cell [0F0D: COMMISSION TESTS, Test Mode] to ‘Disabled’ at
this stage because the test mode will be required for later tests.
5.2.4.2 Testing the trip LED
The trip LED can be tested by initiating a manual circuit breaker trip from the relay.
However, the trip LED will operate during the setting checks performed later. Therefore no
further testing of the trip LED is required at this stage.
5.2.4.3 Testing the user-programmable LEDs
To test the user-programmable LEDs set cell [0F10: COMMISSION TESTS, Test LEDs] to
‘Apply Test’. Check that all 8 programmable LEDs on the relay illuminate.
5.2.5 Field voltage supply
The relay generates a field voltage of nominally 48V that can be used to energize the
opto-isolated inputs (alternatively the substation battery may be used).
Measure the field voltage across the terminals 1 and 2 on the terminal block given in Table
4. Check that the field voltage is within the range 40V to 60V when no load is connected and
that the polarity is correct.
Repeat for terminals 8 and 10.