IEC 61850 process bus
The exchange of sampled values, i.e., between NCIT and
IED devices for protection functions and other purposes is
defined in part 9-2 of the standard. The interconnection
between sensors, actuators, protection and control devices,
is referred to as „process bus“. Besides analog data, also
status information from primary switchgear to IEDs, as well
as command signals from IEDs to the primary switchgear,
can be exchanged.
This finally enables the standard-compliant digitalization of
the last mile in substation automation, and brings with it a
whole range of benefits for utilities.