Without A Timing Source Signal; Time Zone Compensation - GE MiCOM P40 Agile Technical Manual

Chapter 5 - Configuration
3. Ensure that the IED is receiving valid time synchronisation messages by checking that the PTP Status cell
reads Valid Master.
4. Check that Act. Time Source cell reads PTP. This indicates that the IED is using PTP as the source for its
time. Note that If IRIG-B or SNTP have been selected as the Primary Source, these must first be
disconnected before the device can switch to PTP as the active source.
5. Once the IED is using PTP as the active time source, adjust the time offset of the universal coordinated time
on the Master Clock equipment, so that local time is displayed.
6. Check that the time, date and month are correct in the Date/Time cell.
4.4

WITHOUT A TIMING SOURCE SIGNAL

If the time and date is not being maintained by an IRIG-B, PTP or SNTP signal, in the DATE AND TIME column, ensure
that both the Primary Source and Secondary Source are set to NONE.
1. Check that Act. Time Source cell reads Free Running.
2. Set the date and time to the correct local time and date using the Date/Time cell or the serial protocol.
3. If the auxiliary supply fails, the time and date are maintained by the auxiliary battery. Therefore, when the
auxiliary supply is restored, you should not have to set the time and date again. To test this, remove the
auxiliary supply. Leave the device de-energized for approximately 30 seconds. On re-energization, the time
should be correct.
4.5

TIME ZONE COMPENSATION

The UTC time standard uses Greenwich Mean Time as its standard. Without compensation, the date and time
would be displayed on the device irrespective of its location.
You may wish to display the local time corresponding to its geographical location. You can do this with the settings
LocalTime Enable and LocalTime Offset.
The LocalTime Enable has three setting options; Disabled, Fixed, and Flexible.
With Disabled, no local time zone is maintained. Time synchronisation from any interface will be used to directly
set the master clock. All times displayed on all interfaces will be based on the master clock with no adjustment.
With Fixed, a local time zone adjustment is defined using the LocalTime Offset setting and all non-IEC 61850
interfaces, which uses the Simple Network Time Protocol (SNTP), are compensated to display the local time.
With Flexible, a local time zone adjustment is defined using the LocalTime Offset setting. The non-local and
non-IEC 61850 interfaces can be set to either the UTC zone or the local time zone. The local interfaces are always
set to the local time zone and the Ethernet interface is always set to the UTC zone.
The interfaces where you can select between UTC and Local Time are the serial interfaces RP1, RP2, DNP over
Ethernet (if applicable) and Tunnelled Courier (if applicable). This is achieved by means of the following settings,
each of which can be set to UTC or Local.:
RP1 Time Zone
●
● RP2 Time Zone
DNPOE Time Zone
●
● Tunnel Time Zone
The LocalTime Offset setting allows you to enter the local time zone compensation from -12 to + 12 hours at 15
minute intervals.
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