Sel 751A - Table F.10 MSTA Class; Table F.11 MDST Class

F.17
Date Code 20100129 Instruction Manual SEL-751A Relay
IEC 61850 Communications
Logical Node Extensions
Table F.10 defines the extensions to the MSTA data class, Metering Statistics,
defined in the IEC 61850 standard.
Table F.11 defines the MDST data class, Demand Metering Statistics. This
class is a collection of demand currents and energy.
Ta b le F.1 0 M S TA C l a s s
Attribute
Name
Type Explanation T M/O
Measured values
MaxA WYE Maximum Phase Currents O
MinA WYE Minimum Phase Currents O
MaxPhV WYE Maximum Phase to Ground Voltages O
MinPhV WYE Minimum Phase to Ground Voltages O
MaxP2PV DEL Maximum Phase to Phase Voltages O
MinP2PV DEL Minimum Phase to Phase Voltages O
Ta b le F.1 1 M DS T C l a s s
Attribute
Name
Type Explanation T M/O
LNName Shall be inherited from Logical Node Class (see IEC 61850-7-2)
Data
Common Logical Node Information
LN shall inherit all Mandatory Data from Common Logical Node Class. M
EEHealth INS External equipment health (RTD Communications Status) O
Measured values
DmdA WYE Demand Currents O
PkDmdA WYE Peak Demand Currents O
SupWh MV Real energy supply (default supply direction: energy flow towards busbar) O
SupVArh MV Reactive energy supply (default supply direction: energy flow towards busbar) O
DmdWh MV Real energy demand (default demand direction: energy flow from busbar away) O
DmdVArh MV Reactive energy demand (default demand direction: energy flow from busbar
away)
O