F.13
Date Code 20170814
Instruction Manual
SEL-700G Relay
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 depend on the presence and
configuration of the RTD module(s).
Table F.7
New Logical Node Extensions
Logical Node
IEC
61850
Description or Comments
Thermal Measurements
(for equipment or ambient
temperature readings)
MTHR
This LN will be used to represent values
from RTDs and to calculate thermal
capacity and usage mainly used for
Thermal Monitoring.
Demand Metering Statistics
MDST
This LN will be used for calculation of
demand currents in a three-phase system.
This shall not be used for billing purposes.
Circuit Breaker Supervision
SCBR
Circuit breaker supervision abrasion and
operation values.
Table F.8
Thermal Metering Data Logical Node Class Definition
(Sheet 1 of 2)
Data Object
Name
Common
Data
Class
Explanation
T
a
M/O/C/E
b
MTHR Class
LNName
The name will be composed of the class
name, 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
EEHealth
INS
External equipment health
(RTD Communications Status).
E
Data Objects
Measured Values
MaxAmbTmp
MV
Maximum Ambient Temperature
E
MaxOthTmp
MV
Maximum Other Temperature
E
Tmp01
MV
Temperature 1
E
Tmp02
MV
Temperature 2
E
Tmp03
MV
Temperature 3
E
Tmp04
MV
Temperature 4
E
Tmp05
MV
Temperature 5
E
Tmp06
MV
Temperature 6
E
Tmp07
MV
Temperature 7
E
Tmp08
MV
Temperature 8
E
Summary of Contents for SEL-700G Series
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