Schweitzer Engineering Laboratories SEL-787 - Table F.7 Metering and Measurement Logical Nodes; Table F.8 Thermal Metering Data; Logical Node Extensions

F.12
SEL-787 Relay Instruction Manual Date Code 20081022
IEC 61850 Communications
Logical Node Extensions
Logical Node Extensions
The following Logical Nodes and Data Classes were created in this device as
extensions to the IEC 61850 standard, in accordance with IEC 61850
guidelines.
Table F.8 defines the data class, Thermal Metering Data. This class is a
collection of simultaneous measurements (or evaluations) that represent the
RTD thermal metering values. Valid data depends on the presence and
configuration of the RTD module(s).
Table F.7 Metering and Measurement Logical Nodes
Logical Node IEC 61850 Description or comments
Thermal Measurement for
equipment or ambient
temperature readings
MTHR To acquire values from RTDs and to
calculate thermal capacity and usage mainly
used for Thermal Monitoring.
Table F.8 Thermal Metering Data
Attribute Name Type Explanation T M/O
MTHR Class
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
MaxAmbTmp MV Maximum Ambient Temperature
O
MaxOthTmp MV Maximum Other Temperature
O
Tmp01 MV Temperature 1
O
Tmp02 MV Temperature 2
O
Tmp03 MV Temperature 3
O
Tmp04 MV Temperature 4
O
Tmp05 MV Temperature 5
O
Tmp06 MV Temperature 6
O
Tmp07 MV Temperature 7
O
Tmp08 MV Temperature 8
O
Tmp09 MV Temperature 9
O
Tmp10 MV Temperature 10
O
Tmp11 MV Temperature 11
O
Tmp12 MV Temperature 12
O