Schweitzer Engineering Laboratories SEL-751 - Table F.11 Metering Statistics Logical Node Class Definition; Table F.12 Demand Metering Statistics Logical Node Class Definition

F.15
Date Code 20170927 Instruction Manual SEL-751 Relay
IEC 61850 Communications
Logical Node Extensions
Table F.11 defines the data class Metering Statistics. This class is a collection
of power system metering statistics.
Table F.12 defines the data class Demand Metering Statistics. This class is a
collection of demand currents and energy.
Table F.11 Metering Statistics Logical Node Class Definition
MSTA 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
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
AvAmps MV Average current E
AvVolts MV Average voltage E
MaxVA MV Maximum apparent power E
MinVA MV Minimum apparent power E
MaxW MV Maximum real power E
MinW MV Minimum real power E
MaxVAr MV Maximum reactive power E
MinVAr MV Minimum reactive power E
MaxA WYE Maximum phase currents E
MinA WYE Minimum phase currents E
MaxPhV WYE Maximum phase-to-ground voltages E
MinPhV WYE Minimum phase-to-ground voltages E
MaxP2PV DEL Maximum phase-to-phase voltages E
MinP2PV DEL Minimum phase-to-phase voltages E
MaxVs MV Maximum synchronism-check voltage E
MinVs MV Minimum synchronism-check voltage E
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
b
M: Mandatory; O: Optional; C: Conditional; E: Extension
Table F.12 Demand Metering Statistics Logical Node Class Definition (Sheet 1 of 2)
MDST 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
Data Objects
Measured Values
DmdA WYE Phase Demand Currents E
DmdAnseq MV Negative-Sequence Demand Current E