GE D30 series Instruction Manual page 168

5.2 PRODUCT SETUP
d) LOCAL TIME

PATH: SETTINGS PRODUCT SETUP
 LOCAL TIME

5
The
LOCAL TIME OFFSET FROM UTC
(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)
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.
5-48

REAL TIME CLOCK
LOCAL TIME OFFSET
FROM UTC:
DAYLIGHT SAVINGS
MESSAGE
TIME: Disabled
DST START MONTH:
MESSAGE
January
DST START DAY:
MESSAGE
Sunday
DST START DAY
MESSAGE
INSTANCE: First
DST START HOUR:
MESSAGE
2:00
DST STOP MONTH:
MESSAGE
January
DST STOP DAY:
MESSAGE
Sunday
DST STOP DAY
MESSAGE
INSTANCE: First
DST STOP HOUR:
MESSAGE
2:00
setting is used to specify the local time zone offset from Universal Coordinated Time
settings can be used to allow the relay to follow the DST rules of the local time zone.
D30 Line Distance Protection System

LOCAL TIME
Range: –24.0 to 24.0 hrs in steps of 0.5
0.0 hrs
Range: Disabled, Enabled
Range: January to December (all months)
Range: Sunday to Saturday (all days of the week)
Range: First, Second, Third, Fourth, Last
Range: 0:00 to 23:00
Range: January to December (all months)
Range: Sunday to Saturday (all days of the week)
Range: First, Second, Third, Fourth, Last
Range: 0:00 to 23:00
5 SETTINGS
GE Multilin