Real Time Clock - GE T35 UR Series Instruction Manual

5 SETTINGS
a) MAIN MENU

PATH: SETTINGS PRODUCT SETUP
 REAL TIME
 CLOCK
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
The relay contains a real time clock (RTC) to create timestamps for communications protocols as well as for historical data,
such as event records and oscillography. When the relay restarts, the RTC initializes from an onboard battery-backed
clock, which has the same accuracy as an electronic watch, approximately ±1 minute per month (~23 ppm). Once the RTC
is synchronized with the Precision Time Protocol (PTP), IRIG-B, or SNTP, its accuracy approaches that of the synchroniz-
ing time delivered to the relay.
The
SYNCHRONIZING SOURCE
able external time sources synchronizes the RTC and the synchrophasor clock. A setting of None causes the RTC and the
synchrophasor clock to free-run. A setting of PP/IRIGB/PTP/SNTP, IRIGB/PP/PTP/SNTP, or PP/PTP/IRIGB/SNTP causes
the relay to track the first source named that is enabled and operational, or free-run if none of these are available. Here, PP
means a time source that is strictly compliant with PP, PTP means a time source that is not strictly compliant with PP. When
a time source fails or recovers, the relay automatically transfers synchronization as required by this setting.
See the 
COMMANDS SET DATE AND TIME
The
REAL TIME CLOCK EVENTS
records the RTC time before the adjustment.
To enable IRIG-B synchronization, the input
synchronization can be disabled by making this setting None.
To configure and enable PTP and/or SNTP, or to set local time parameters (for example time zone, daylight savings), use
the following sections.
b) PRECISION TIME PROTOCOL (1588)

PATH: SETTINGS PRODUCT SETUP
 PRECISION TIME
 PROTOCOL (1588)
MESSAGE
MESSAGE
MESSAGE
GE Multilin


REAL TIME CLOCK

SYNCRONIZING SOURCE:
None
REAL TIME CLOCK
EVENTS: Disabled
IRIG-B SIGNAL TYPE:
None
 PRECISION TIME
 PROTOCOL (1588)
 SNTP PROTOCOL

 LOCAL TIME

setting configures the priority sequence that the relay uses to determine which of the avail-
menu section of this manual to manually set the RTC.
setting allows changes to the date and/or time to be captured in the event record. The event
IRIG-B SIGNAL TYPE
 
REAL TIME CLOCK
STRICT POWER PROFILE:
Disabled
PTP DOMAIN NUMBER
0
PTP VLAN PRIORITY
4
PTP VLAN ID
0
 PTP PORT 1

T35 Transformer Protection System
Range: None, PP/IRIG-B/PTP/SNTP, IRIG-B/PP/PTP/
SNTP, PP/PTP/IRIG-B/SNTP
Range: Enabled, Disabled
Range: None, DC Shift, Amplitude Modulated
See below
See below
See below
must be set to DC Shift or Amplitude Modulated. IRIG-B
PRECISION TIME PROTOCOL (1588)
Range: Enabled, Disabled
Range: 0 to 255
Range: 0 to 7
Range: 0 to 4095
5.2 PRODUCT SETUP
5.2.7 REAL TIME CLOCK
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