GE T35 Instruction Manual page 312

PRODUCT SETUP
The
REAL TIME CLOCK EVENTS
records the RTC time before the adjustment. A Date/Time Changed event is generated when:
• The real time clock changed from SNTP/PTP/IRIG-B and the time difference is more than one second
• The real time clock changed from the front panel or via Modbus register. The relay always generates this event
regardless of the time difference.
• The Daylight Saving Time (DST) setting gets enabled and the current relay time is already in the DST zone
• The real time clock enters or leaves DST
To enable IRIG-B synchronization, the input
synchronization can be disabled by making this setting None.
Clocks can be synchronized locally among several relays using the computer time. When using a time source, such as IRIG-
B, the time is overwritten eventually by the time source. To synchronize clocks among UR devices:
1. In the EnerVista software, expand the main menu in the Online Window area and select the Synchronize Devices
entry. The window opens. The software prompts to acknowledge any offline devices.
2. Click the Synchronize Devices button at the top of the window, and confirm the action at the prompt. The devices
assume the time of the computer being used.
To configure and enable PTP and/or SNTP, or to set local time parameters (for example time zone, daylight savings), use the
following sections.
5.3.7.2 Precision Time Protocol (1588)
SETTINGS  PRODUCT SETUP  REAL TIME CLOCK  PRECISION TIME PROTOCOL (1588)
 PRECISION TIME
5  PROTOCOL (1588)
SETTINGS  PRODUCT SETUP  REAL TIME CLOCK  PRECISION TIME PROTOCOL (1588)  PTP PORT 1(3)
 PTP PORT 1

The T35 is provided with optional Precision Time Protocol capability. This feature is specified as the IEEE 1588
software option at the time of ordering. See the Order Codes section in chapter 2 for details.
The T35 supports the Precision Time Protocol (PTP) specified in IEEE Std 1588 2008 using the Power Profile (PP) specified in
IEEE Std C37.238 2011. This enables the relay to synchronize to the international time standard over an Ethernet network
that implements PP.
5-110
setting allows changes to the date and/or time to be captured in the event record. The event
IRIG-B SIGNAL TYPE
STRICT POWER

PROFILE: Disabled
PTP DOMAIN NUMBER:

0
PTP VLAN PRIORITY:

4
PTP VLAN ID:

0
 PTP PORT 1


PORT 1 PTP FUNCTION:

Disabled
PORT 1 PATH DELAY

ADDER: 0 ns
PORT 1 PATH DELAY

ASYMMETRY: 0 ns
must be set to DC Shift or Amplitude Modulated. IRIG-B
Range: Enabled, Disabled
Range: 0 to 255
Range: 0 to 7
Range: 0 to 4095
See below
Range: Enabled, Disabled
Range: 0 to 60000 ns in steps of 1
Range: –1000 to +1000 ns in steps of 1
T35 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 5: SETTINGS