RT430/434
Appendix E – Application Examples
Application Example 1: Traditional and Modern Time Sync
Application Example 2: System Wide Grandmaster Clock
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The first example illustrates the traditional and modern manners to synchronize
devices, using a single time source: RT430. In the left, the clock provides NTP and
IRIG-B for legacy IEDs, and in the right, the PTP represents the modern protocol for
time synchronization. Using Ethernet networks, the PTP is distributed through PTP-
aware Ethernet switches and whenever a legacy IED needs to be included in a
modern architecture, the RT431 acts as a PTP translator converting PTP to IRIG-B or
PPS.
Figure 44: Traditional x Modern Time Synchronization
Using the RT430 along with GE JunglePAX is a great way to have PTP over a wide
network. The next figure exemplifies an architecture which a given application has a
local PTP Grandmaster clock, which commonly will be the Best Grandmaster Clock
for the local IEDs. Whenever this local clock became unavailable or does not
represent the best accurate clock, the local IEDs can count with a remote PTP
Grandmaster clock, which is called as System Wide Grandmaster.
Chapter 10 - Appendixes
RT430/434