GE T35 UR Series, Instruction Manual

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GE Multilin T35 Transformer Protection System 5-49
5 SETTINGS 5.2 PRODUCT SETUP
5
5.2.7 REAL TIME CLOCK
a) MAIN MENU
PATH: SETTINGS

PRODUCT SETUP

REAL TIME CLOCK
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
setting configures the priority sequence that the relay uses to determine which of the avail-
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
menu section of this manual to manually set the RTC.
The
REAL TIME CLOCK EVENTS
setting allows changes to the date and/or time to be captured in the event record. The event
records the RTC time before the adjustment.
To enable IRIG-B synchronization, the input
IRIG-B SIGNAL TYPE
must be set to DC Shift or Amplitude Modulated. IRIG-B
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

REAL TIME CLOCK

PRECISION TIME PROTOCOL (1588)

REAL TIME

CLOCK
SYNCRONIZING SOURCE:
None
Range: None, PP/IRIG-B/PTP/SNTP, IRIG-B/PP/PTP/
SNTP, PP/PTP/IRIG-B/SNTP
MESSAGE
REAL TIME CLOCK
EVENTS: Disabled
Range: Enabled, Disabled
MESSAGE
IRIG-B SIGNAL TYPE:
None
Range: None, DC Shift, Amplitude Modulated
MESSAGE

PRECISION TIME

PROTOCOL (1588)
See below
MESSAGE

SNTP PROTOCOL

See below
MESSAGE

LOCAL TIME

See below

PRECISION TIME

PROTOCOL (1588)
STRICT POWER PROFILE:
Disabled
Range: Enabled, Disabled
MESSAGE
PTP DOMAIN NUMBER
0
Range: 0 to 255
MESSAGE
PTP VLAN PRIORITY
4
Range: 0 to 7
PTP VLAN ID
0
Range: 0 to 4095
MESSAGE

PTP PORT 1
