GE Digital Energy L30, Instruction Manual, Page: 175 / 644

GE Multilin L30 Line Current Differential System 5-49
5 SETTINGS 5.2 PRODUCT SETUP
5
c) LOCAL TIME
PATH: SETTINGS

PRODUCT SETUP

REAL TIME CLOCK

LOCAL TIME
The
LOCAL TIME OFFSET FROM UTC
setting is used to specify the local time zone offset from Universal Coordinated Time
(Greenwich Mean Time) in hours. Time zones in the eastern hemisphere have positive values; time zones in the western
hemisphere have negative values. A value of zero causes the relay to use UTC for local time. This setting has two uses.
When the system RTC is synchronized with IRIG-B or is free-running, the offset setting is used to calculate UTC time from
the local time these provide. When the RTC is synchronized with PTP or SNTP, the offset is used to determine local time
from the UTC time provided by PTP or SNTP. PTP ALTERNATE_TIME_OFFSET_INDICATOR TLVs are not used in calcu-
lating local time.
The
DAYLIGHT SAVINGS TIME (DST)
settings can be used to allow the relay to follow the DST rules of the local time zone.
Note that when IRIG-B time synchronization is active, the local time in the IRIG-B signal contains any daylight savings time
offset and so the DST settings are ignored.

LOCAL TIME

LOCAL TIME OFFSET
FROM UTC:
0.0 hrs
Range: –24.0 to 24.0 hrs in steps of 0.5
MESSAGE
DAYLIGHT SAVINGS
TIME: Disabled
Range: Disabled, Enabled
MESSAGE
DST START MONTH:
January
Range: January to December (all months)
MESSAGE
DST START DAY:
Sunday
Range: Sunday to Saturday (all days of the week)
MESSAGE
DST START DAY
INSTANCE: First
Range: First, Second, Third, Fourth, Last
MESSAGE
DST START HOUR:
2:00
Range: 0:00 to 23:00
MESSAGE
DST STOP MONTH:
January
Range: January to December (all months)
MESSAGE
DST STOP DAY:
Sunday
Range: Sunday to Saturday (all days of the week)
MESSAGE
DST STOP DAY
INSTANCE: First
Range: First, Second, Third, Fourth, Last
MESSAGE
DST STOP HOUR:
2:00
Range: 0:00 to 23:00