Schweitzer Engineering Laboratories SEL-751 - Table F.10 Thermal Element Metering Data Logical Node Class Definition

F.14
SEL-751 Relay Instruction Manual Date Code 20170927
IEC 61850 Communications
Logical Node Extensions
Table F.10 defines the data class Thermal Element Metering Data. This class
is a collection of simultaneous measurements (or evaluations) that represent
the IEC 49 Thermal Element values.
Data Objects
Measured Values
MaxAmbTmp MV Maximum Ambient Temperature E
MaxBrgTmp MV Maximum Bearing Temperature E
MaxOthTmp MV Maximum Other Temperature E
MaxWdgTmp MV Maximum Winding Temperature E
Tmp MV Temperature 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.9 Thermal Metering Data Logical Node Class Definition (Sheet 2 of 2)
MTHR Class
Data Object Name
Common
Data Class
Explanation T
a
M/O/C/E
b
Table F.10 Thermal Element Metering Data Logical Node Class Definition
MTHE 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 Values
Thrl1 MV Operating quantity thermal level memory from Element 1 E
Thrl2 MV Operating quantity thermal level memory from Element 2 E
Thrl3 MV Operating quantity thermal level memory from Element 3 E
Thieq1 MV Operating quantity equivalent current from Element 1 E
Thieq2 MV Operating quantity equivalent current from Element 2 E
Thieq3 MV Operating quantity equivalent current from Element 3 E
Thtcu1 MV Thermal capacity used from Element 1 E
Thtcu2 MV Thermal capacity used from Element 2 E
Thtcu3 MV Thermal capacity used from Element 3 E
Thtrip1 MV Time before thermal element trips from Element 1 E
Thtrip2 MV Time before thermal element trips from Element 2 E
Thtrip3 MV Time before thermal element trips from Element 3 E
Thrls1 MV Time before thermal element releases from Element 1 E
Thrls2 MV Time before thermal element releases from Element 2 E
Thrls3 MV Time before thermal element releases from Element 3 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