F.18
SEL-751 Relay Instruction Manual Date Code 20170927
IEC 61850 Communications
Logical Node Extensions
Table F.17 Measurement Logical Node Class Definition
MMXU Class
Data Object Name
Common
Data Class
Explanation T
a
a
Transient data objects—the status of data objects with this designation is momentary and must be logged or reported to provide evidence
of their momentary state.
M/O/C/E
b
b
M: Mandatory; O: Optional; C: Conditional; E: Extension.
LNName The name shall be composed of the class name, the LN-Prefix, and the
LN-Instance-ID (according to IEC 61850-7-2).
Common Logical Node Information
LN shall inherit all Mandatory Data from Common Logical Node Class. M
Data Objects
Measured and Metered Values
PPV DEL Phase-to-phase voltages O
PhV WYE Phase-to-ground voltages O
A WYE Phase currents O
VSyn CMV Synchronism-check voltage E
Table F.18 Generic Process I/O Logical Node Class Definition
GGIO Class
Data Object Name
Common
Data Class
Explanation T
a
a
Transient data objects—the status of data objects with this designation is momentary and must be logged or reported to provide evidence
of their momentary state.
M/O/C/E
b
b
M: Mandatory; O: Optional; C: Conditional; E: Extension.
LNName The name shall be composed of the class name, the LN-Prefix, and the
LN-Instance-ID (according to IEC 61850-7-2).
Common Logical Node Information
LN shall inherit all Mandatory Data from Common Logical Node Class. M
Data Objects
Measured Values
AnIn MV Analog input O
Ra MV Remote analog E
Controls
SPCSO SPC Single point controllable status output O
Status Information
Ind SPS General indication (binary input) O
Table F.19 Circuit Breaker Supervision (Per-Phase) Logical Node Class Definition (Sheet 1 of 2)
SCBR Class
Data Object Name
Common
Data Class
Explanation T
a
M/O/C/E
b
LNName The name shall be composed of the class name, the LN-Prefix, and the
LN-Instance-ID (according to IEC 61850-7-2).
Common Logical Node Information
LN shall inherit all Mandatory Data from Common Logical Node Class. M
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