Application - ABB RELION 670 SERIES Applications Manual

1MRK 506 369-UUS -
20.2.2
Line distance protection REL670 2.2 ANSI
Application manual

Application

Dynamic access point diagnostic (RCHLCCH) is used to supervise and assure redundant
Ethernet communication over two channels. This will secure data transfer even though
one communication channel might not be available for some reason
Parallel Redundancy Protocol (PRP) and High-availability Seamless Redundancy (HSR)
provides redundant communication over station bus running the available communication
protocols. The redundant communication uses two Ethernet ports.
Device 1
AP1
PhyPortA PhyPortB
Switch A
PhyPortA PhyPortB
AP1
Device 3
IEC09000758 V4 EN
Figure 401: Parallel Redundancy Protocol (PRP)
Ethernet-based communication
Device 2
AP1
PhyPortA PhyPortB
Switch B
PhyPortA PhyPortB
AP1
Device 4
IEC09000758-4-en.vsd
Section 20
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