Figure 8: HSR solution
2.5.3 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.
UniGear Digital switchgear concept relies on the process bus together with current
and voltage sensors. The process bus enables several advantages for the UniGear
Digital like simplicity with reduced wiring, flexibility with data availability to all
devices, improved diagnostics and longer maintenance cycles.
With process bus the galvanic interpanel 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.
1MRS758755 C
REC615 and RER615 overview
REC615 & RER615
Technical Manual
39
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