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.
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
Summary of Contents for SEL-787
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