IEC 61850 Logical Node Group Designation

IEC 61850 uses a well defined designation of Logical Node Groups like MMXU for 3phase electrical measurements. The following groups are defined:

A   Automatic control
C   Supervisory control
D   DER (Distributed Energy Resources)
F   Functional blocks
G   Generic function references
H   Hydro power
I    Interfacing and archiving
K   Mechanical and non-electrical primary equipment
L    System logical nodes
M   Metering and measurement
P    Protection functions
Q    Power quality events detection related
R    Protection related functions
S    Supervision and monitoring
T    Instrument transformer and sensors
W   Wind power
X    Switchgear
Y    Power transformer and related functions
Z    Further (power system) equipment

A total of several hundred of Logical Nodes are already defined and published.