CHAPTER 6: COMMUNICATIONS REAL-TIME CLOCK
D90
PLUS
LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL 147
Time Zone Offset
Range: –24.0 to 24.0 hours in steps of 0.5
Default: 0.0 hours
This setting specifies the local time zone offset from Greenwich Mean Time (GMT) in
hours. This setting has two uses. When the D90
Plus
is time synchronized with IRIG-B, or
has no permanent time synchronization, the offset is used to calculate Universal
Coordinated Time (UTC) time for IEC 61850 features. When the D90
Plus
is time
synchronized with SNTP, the offset is used to determine the local time for the
D90
Plus
clock, since SNTP provides UTC time.
DST Function
Range: Enabled, Disabled
Default: Disabled
This setting enables and disables the daylight saving time function.
DST Start Month
Range: January through December (all months of the year)
Default: April
This setting specifies the start month for daylight saving time.
DST Start Day
Range: Sunday through Saturday (all days of the week)
Default: Sunday
This setting specifies the day of the week to start daylight saving time.
DST Start Day Instance
Range: First, Second, Third, Fourth, Last
Default: First
This setting specifies which instance of the day of the week to start daylight saving time.
For example, if daylight saving time begins on the second Monday in April, program this
setting to “Second.”
DST Start Hour
Range: 0 to 23 in steps of 1
Default: 2
This setting specifies the hour to start daylight saving time. For example, if daylight
saving time begins at 2:00 AM, program this setting to “2.”
DST Stop Month
Range: January through December (all months of the year)
Default: November
This setting specifies the stop month for daylight saving time.
DST Stop Day
Range: Sunday through Saturday (all days of the week)
Default: Sunday
This setting specifies the day of the week to stop daylight saving time.
DST Stop Day Instance
Range: First, Second, Third, Fourth, Last
Default: First
This setting specifies which instance of the day of the week to start daylight saving time.
For example, if daylight saving time ends on the fourth Monday in November, program
this setting to “Fourth.”
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