Innovation & Technology

Highest safety level for redundant communication achieved on SEPCOS Protection & Control Relay

Modularity and adaptability are key strengths of the Sepcos. It has been developed with the aim of ensuring the closest possible match to customer needs, especially where the type and architecture of communication are concerned.

Sepcos is ready to meet these needs in terms of redundancy. 

The PRP (Parallel Redundancy Protocol) and HSR (High-availability Seamless Redundancy) according to IEC62439-3 are directly embedded in the Sepcos.

PRP achieves active network redundancy through packet duplication over two independent networks (LANs) which operate in parallel. HSR has been designed mainly for ring topologies.

HSR is complementary to the PRP philosophy, although HSR functions as a protocol for creating device redundancy.

PRP principle of operation

This redundancy protocol implements redundancy in the protection relay (logical node) rather than in the network using doubly attached nodes according to PRP.

The source sends the same frame over both networks (LANs) and the destination receives it from both LANs within a certain time, consumes the first frame and discards the duplicate.

Focus on HSR

Compared with PRP, HSR optimizes network usage and offers a huge cost saving for construction of the entire system.

HSR provides zero recovery time in case of failure of one component. It is suited to applications that demand high availability and the very short reaction time required for the protection of electrical substations.

Secheron is a pioneer in the field of PRP/HSR, which is a new development, and has already successfully commissioned projects using this standard in Brazil and Europe.

This option is available on optical fibre or RJ45 supports.

More and more specifications are calling for this type of communication and redundancy in order to improve communication systems. It promises a great future for this standard.

See more on actuel SEPCOS Range


> See more news - 2015