5-110 T35 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
PRODUCT SETUP CHAPTER 5: SETTINGS
5
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. 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
IRIG-B SIGNAL TYPE must be set to DC Shift or Amplitude Modulated. IRIG-B
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)
SETTINGS PRODUCT SETUP REAL TIME CLOCK PRECISION TIME PROTOCOL (1588) PTP PORT 1(3)
The T35 supports the Precision Time Protocol (PTP) specified in IEEEStd1588 2008 using the Power Profile (PP) specified in
IEEEStdC37.238 2011. This enables the relay to synchronize to the international time standard over an Ethernet network
that implements PP.
PRECISION TIME
PROTOCOL (1588)
STRICT POWER
PROFILE: Disabled
Range: Enabled, Disabled
PTP DOMAIN NUMBER:
0
Range: 0 to 255
PTP VLAN PRIORITY:
4
Range: 0 to 7
PTP VLAN ID:
0
Range: 0 to 4095
PTP PORT 1
See below
PTP PORT 1
PORT 1 PTP FUNCTION:
Disabled
Range: Enabled, Disabled
PORT 1 PATH DELAY
ADDER: 0 ns
Range: 0 to 60000 ns in steps of 1
PORT 1 PATH DELAY
ASYMMETRY: 0 ns
Range: –1000 to +1000 ns in steps of 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.
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