ABB RELION 615 Series Product Manual page 24

Transformer Protection and Control
RET615
Product version: 5.0 FP1
GUID-334D26B1-C3BD-47B6-BD9D-2301190A5E9D V2 EN
Figure 15. Parallel redundancy protocol (PRP) solution
HSR applies the PRP principle of parallel operation to a single
ring. For each message sent, the node sends two frames, one
through each port. Both the frames circulate in opposite
directions over the ring. Every node forwards the frames it
receives from one port to another to reach the next node. When
the originating sender node receives the frame it sent, the
24
COM600
Ethernet switch
IEC 61850 PRP
Ethernet switch
sender node discards the frame to avoid loops. The HSR ring
with 615 series relays supports the connection of up to 30
relays. If more than 30 relays are to be connected, it is
recommended to split the network into several rings to
guarantee the performance for real-time applications.
1MRS756891 M
SCADA
ABB