Process Bus - ABB Relion SMU615 Technical Manual

Section 2
SMU615 overview
2.5.2
26
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Figure 6: HSR solution

Process bus

Process bus IEC 61850-9-2 defines the transmission of Sampled Measured Values
within the substation automation system. International Users Group created a
guideline IEC 61850-9-2 LE that defines an application profile of IEC 61850-9-2 to
facilitate implementation and enable interoperability. Process bus is used for
distributing process data from the primary circuit to all process bus compatible
devices in the local network in a real-time manner. The data can then be processed by
any protection relay to perform different protection, automation and control functions.
With process bus the galvanic wiring for sharing busbar voltage value can be replaced
with Ethernet communication. Transmitting measurement samples over process bus
brings also higher error detection because the signal transmission is automatically
supervised. Additional contribution to the higher availability is the possibility to use
redundant Ethernet network for transmitting SMV signals.
1MRS758407 B
SMU615
Technical Manual