5-32
N60 Network Stability and Synchrophasor Measurement System
GE Multilin
5.2 PRODUCT SETUP
5 SETTINGS
5
5.2.6 REAL TIME CLOCK
PATH: SETTINGS
Ö
PRODUCT SETUP
ÖØ
REAL TIME CLOCK
The date and time can be synchronized a known time base and to other relays using an IRIG-B signal. It has the same
accuracy as an electronic watch, approximately ±1 minute per month. If an IRIG-B signal is connected to the relay, only the
current year needs to be entered. See the
COMMANDS
ÖØ
SET DATE AND TIME
menu to manually set the relay clock.
The
REAL TIME CLOCK EVENTS
setting allows changes to the date and/or time to be captured in the event record.
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. This setting has two uses. When the N60 is time synchronized with IRIG-B, or has no
permanent time synchronization, the offset is used to calculate UTC time for IEC 61850 features. When the N60 is time
synchronized with SNTP, the offset is used to determine the local time for the N60 clock, since SNTP provides UTC time.
The daylight savings time (DST) settings can be used to allow the N60 clock can follow the DST rules of the local time
zone. Note that when IRIG-B time synchronization is active, the DST settings are ignored. The DST settings are used when
the N60 is synchronized with SNTP, or when neither SNTP nor IRIG-B is used.
Only timestamps in the event recorder and communications protocols are affected by the daylight savings time set-
tings. The reported real-time clock value does not change.
REAL TIME
CLOCK
IRIG-B SIGNAL TYPE:
None
Range: None, DC Shift, Amplitude Modulated
MESSAGE
REAL TIME CLOCK
EVENTS: Disabled
Range: Disabled, Enabled
MESSAGE
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:
April
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:
April
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
NOTE
