Iec 1588 Precision Time Protocol (Ptp) - GE 350 Communications Manual

GE
Digital Energy
SR350 Feeder Protection System
Chapter 7: Time Protocols

IEC 1588 Precision Time Protocol (PTP)

Real Time Clock
350 FEEDER PROTECTION SYSTEM – COMMUNICATIONS GUIDE
Time Protocols
The present values of the PTP protocol are displayed here.
PATH:
Actual Values > A1 Status
The RTC Sync Source actual value is the time synchronizing source the relay is using at
present. Possible sources are: PTP Clock, IRIG-B, SNTP and Internal.
PATH:
Actual Values > A1 Status > PTP
Grandmaster ID: GRAND MAS HI + GRAND MAS ID LO is the grandmaster Identity code
being received from the present PTP grandmaster, if any. When the relay is not using any
PTP grandmaster, this actual value is zero. The grandmaster Identity code is specified by
PTP to be globally unique, so one can always know which clock is grandmaster in system
with multiple grandmaster-capable clocks.
PATH: SETPOINTS > S1 RELAY SETUP > CLOCK
PTP FUNCTION
Range: Enabled, Disabled
Default: Enabled
When "Disabled" is selected for this setting, PTP is disabled on the port . The relay does
not generate, or listen to, PTP messages on the port.
PTP STRICT POWER PROFILE
Range: Enabled, Disabled
Default: Enabled
Power profile (IEEE Std C37.238™ 2011) requires that the relay selects as a grandmaster:
• only power profile compliant clocks
that the delivered time has a worst-case error of ±1 μs
•
7–1