GE N60 Instruction Manual page 197

CHAPTER 5: SETTINGS
The setting configures the priority sequence of the time synchronization source, to determine
SYNCHRONIZING SOURCE
which of the available external time sources to use for time synchronization. A setting of None causes the RTC and the
synchrophasor clock to free-run. A setting of PP/IRIG-B/PTP/SNTP, IRIG-B/PP/PTP/SNTP, or PP/PTP/IRIG-B/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, and 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.
Setup for IRIG-B is illustrated in the Installation chapter.
The clock is updated by all sources active in the device. This means that whenever a time synchronization message is
received through any of the active protocols, the N60 clock updates. However, given that IEC 60870-5-103, IEC 60870-5-
104, Modbus, and DNP are low-accuracy time synchronization methods, avoid their use for synchronization when better
accuracy time protocols, such as IRIG-B, PTP, and SNTP, are active in the system.
See the
COMMANDS  SET DATE AND TIME
The setting allows changes to the date and/or time to be captured in the event record. The event
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.
5.3.6.2 Precision time protocol (1588)
SETTINGS  PRODUCT SETUP  REAL TIME CLOCK  PRECISION TIME PROTOCOL (1588)
 PRECISION TIME
 PROTOCOL (1588)
SETTINGS  PRODUCT SETUP  REAL TIME CLOCK  PRECISION TIME PROTOCOL (1588)  PTP PORT 1(3)
 PTP PORT 1

The N60 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 N60 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.
N60 NETWORK STABILITY AND SYNCHROPHASOR MEASUREMENT SYSTEM – INSTRUCTION MANUAL
menu section of this manual to manually set the RTC.
must be set to DC Shift or Amplitude Modulated. IRIG-B
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: 00000 ns
PORT 1 PATH DELAY

ASYMMETRY: 0000 ns
Range: Enabled, Disabled
Range: 0 to 255
Range: 0 to 7
Range: 0 to 4095
See below
Range: Enabled, Disabled
Range: 0 to 60 000 ns in steps of 1
Range: –1 000 to +1 000 ns in steps of 1
PRODUCT SETUP
5
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