Sel 411L - Figure 3.188 Line Module of a Single ICON for Transporting Current Differential Data of Eight Relays to the SONET Network

P.3.276
SEL-411L Relay Protection Manual Date Code 20151029
Protection Functions
87L Communication and Timing
Dedicated Ethernet Carried Over SONET by SEL ICONs
NOTE: When you design a network
using SEL ICONs, be sure that all
relays that protect the line receive
their respective IRIG-B time signals
from the line modules of the ICON. Do
not provide IRIG-B signals from a
different clock to any of the relays.
In the following discussions the term “dedicated” means that the network
carries no traffic (SCADA, video, etc.) other than 87L traffic.
Figure 3.188 shows an example of an Ethernet-over-TDM system that uses
SEL ICONs. This system combines the advantages of a packet-based
communications system with the deterministic timing advantages of a TDM
system. For more information on the advantages of this topology, see the
paper Merging SONET and Ethernet Communications for Power System
Applications available from the SEL web site at http://www.selinc.com/.
The SEL ICON supports a minimum of eight Ethernet ports. Figure 3.188
shows an example of a station with eight lines, all with current differential
protection. You can use the ICON for optimum SONET performance, allocate
a single STS1 for the SONET bandwidth to transport Ethernet current
differential data over the SONET network.
Notice the IRIG-B inputs; selecting Ethernet communications for current
differential protection traffic requires that the relays be time synchronized.
With a satellite-synchronized network clock, such as the SEL-2488, connected
to the SEL ICON, the SEL ICON can distribute time to all eight SEL-411L
relays at Station A.
Figure 3.188 Line Module of a Single ICON for Transporting Current Differential Data of Eight
Relays to the SONET Network
For more information on the ICON, please visit our web site at
http://www.selinc.com/.
A Dedicated Ethernet Network Engineered to Provide Appropriate
Bandwidth, Traffic Congestion Control, and Acceptable Latency
In the following discussions the term “dedicated” means that the network
carries no traffic (SCADA, video, etc.) other than the 87L traffic. "Managed
switch" refers to an Ethernet switch which provides the ability to configure the
Station A
SEL-411L
100 Mbps
SONET Network
IRIG-B
IRIG-B Signal From The ICON
Station H
SEL-411L
IRIG-B
87L Traffic
or
TDP/IP Traffic
SEL-2488
ICON
SEL-2488
ICON
100 Mbps
100 Mbps
100 Mbps
100 Mbps
100 Mbps
100 Mbps
100 Mbps
100 Mbps
Station B
SEL-411L
IRIG-B
SEL-2488
ICON