Alstom MiCOM P546 - 5.2.3 Date and time; 5.2.3.1 With an IRIG-B signal; 5.2.3.2 Without an IRIG-B signal

P54x/EN CM/La4 Commissioning
(CM) 10-20 MiCOM P543, P544, P545 & P546
CM
5.2.3 Date and time
Before setting the date and time, ensure that the factory-fitted battery isolation strip, that
prevents battery drain during transportation and storage, has been removed. With the lower
access cover open, presence of the battery isolation strip can be checked by a red tab
protruding from the positive side of the battery compartment. Whilst lightly pressing the
battery, to prevent it from falling out of the battery compartment, pull the red tab to remove
the isolation strip.
The date and time should now be set to the correct values. The method of setting will
depend on whether accuracy is being maintained using the optional Inter-Range
Instrumentation Group standard B (IRIG-B) port on the rear of the relay.
5.2.3.1 With an IRIG-B signal
If a satellite ti
me clock signal conforming to IRIG-B is provided and the relay has the optional
IRIG-B port fitted, the satellite clock equipment should be energized.
To allow the relay’s time and date to be maintained from an external IRIG-B source cell
[0804: DATE and TIME, IRIG-B Sync.] must be set to ‘Enabled’.
Ensure the relay is receiving the IRIG-B signal by checking that cell [0805: DATE and TIME,
IRIG-B Status] reads ‘Active’.
Once the IRIG-B signal is active, adjust the time offset of the universal co-coordinated time
(satellite clock time) on the satellite clock equipment so that local time is displayed.
Check the time, date and month are correct in cell [0801: DATE and TIME, Date/Time]. The
IRIG-B signal does not contain the current year so it will need to be set manually in this cell.
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 IRIG-B signal, and then remove the auxiliary supply from the relay.
Leave the relay de-energized for approximately 30 seconds. On re-energization, the time in
cell [0801: DATE and TIME, Date/Time] should be correct.
Reconnect the IRIG-B signal.
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: DATE and TIME, 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.