LN: Temperature supervision Name: STMP
Logical node STMP shall be used to represent various devices that supervise the temperatures of major plant objects. It provides alarm and trip/shutdown functions. If more than one sensor (LN TTMP) is connected, the LN STMP shall be instantiated for each sensor.
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STMP class |
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Data object name |
Common data class |
Explanation |
T |
М/О/ c |
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LNName |
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The name shall be composed of the class name, the LN-Prefix and LN- Instance-ID according to IEC 61850-7-2, Clause 22. |
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Data objects |
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Descriptions |
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EEName |
DPL |
External equipment nameplate |
|
о |
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Status information |
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EEHealth |
ENS |
External equipment health |
|
о |
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Alm |
SPS |
Temperature alarm level reached |
|
О |
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Trip |
SPS |
Temperature trip level reached |
|
о |
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Measured and metered values |
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Tmp |
MV |
Temperature |
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о |
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Controls |
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OpCntRs |
INC |
Resettable operation counter |
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О |
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Settings |
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TmpAlmSpt |
ASG |
Temperature alarm level set-point |
|
о |
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TmpTripSpt |
ASG |
Temperature trip level set-point |
|
О |
LN: Vibration supervision Name: SVBR
Logical node SVBR shall be used to represent various devices that supervise the vibrations in rotating plant objects such as shafts, turbines, generators etc. It provides alarm and trip / shutdown functions. If more than one sensor (LN TVBR) is connected, the LN SVBR shall be instantiated for each sensor.
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SVBR class |
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Data object name |
Common data class |
Explanation |
T |
М/О/ c |
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LNName |
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The name shall be composed of the class name, the LN-Prefix and LN- Instance-ID according to IEC 61850-7-2, Clause 22. |
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Data objects |
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Status information |
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Alm |
SPS |
Vibration alarm level reached |
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M |
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Trip |
SPS |
Vibration trip level reached |
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о |
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Measured and metered values |
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Vbr |
MV |
Vibration level |
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о |
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AxDsp |
MV |
Total axial displacement |
|
О |
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Controls |
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OpCntRs |
INC |
Resettable operation counter |
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о |
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Settings |
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VbrAlmSpt |
ASG |
Vibration alarm level set-point |
|
о |
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VbrTripSpt |
ASG |
Vibration trip level set-point |
|
О |
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AxDAImSpt |
ASG |
Axial displacement alarm level set-point |
|
о |
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AxDTripSpt |
ASG |
Axial displacement trip level set-point |
|
о |
Logical nodes for instrument transformers and sensors LN Group: T
Modelling remarks
This group of logical nodes represents the sensors for all the different values which have to be continuously sampled for monitoring their behaviour over time. These samples are used either by dedicated processing logical node classes as for protection (see LN Group P) or by the related supervision logical node classes (see LN group S). The sampling rate defines the time resolution of the resulting figures of the processing logical node classes (group P, group S). The modelling of samples are conditional since they are not exposed to communication in any case, as T and S nodes may be implemented in the same IED.
LN: Angle Name: TANG
Logical node TANG shall be used to represent a measurement of an angle between two objects (one of which might be a theoretical vertical or horizontal line). The measurement can be returned optionally as degrees or radians (° or rad).
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TANG class |
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Data object name |
Common data class |
Explanation |
T |
Ml QIC |
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LNName |
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The name shall be composed of the class name, the LN-Prefix and LN- Instance-ID according to IEC 61850-7-2, Clause 22. |
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Data objects |
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Descriptions |
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EEName |
DPL |
External equipment name plate |
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О |
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Status information |
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EEHealth |
ENS |
External equipment health |
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О |
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Measured and metered values |
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AngSv |
SAV |
Angle |
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С |
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Settings |
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SmpRte |
ING |
Sampling rate setting |
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О |
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Condition C: The data object is mandatory if the data object is transmitted over a communication link and therefore it is visible. |
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LN: Axial displacement Name: TAXD
Logical node TAXD shall be used to represent an axial displacement value. The axial displacement can, depending on the application, be either longitudinal or transverse to the shaft. This sensor is often used together with vibration sensors as input to a vibration monitoring system.
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TAXD class |
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Data object name |
Common data class |
Explanation |
T |
Ml QIC |
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LNName |
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The name shall be composed of the class name, the LN-Prefix and LN- Instance-ID according to IEC 61850-7-2, Clause 22. |
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Data objects |
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Descriptions |
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EEName |
DPL |
External equipment name plate |
|
О |
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Status information |
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EEHealth |
ENS |
External equipment health |
|
О |
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Measured and metered values |
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AxDspSv |SAV |Total axial displacement |
|C |
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Settings
SmpRte I ING [Sampling rate setting | |O
Condition C: The data object is mandatory if the data object is transmitted over a communication link and therefore gets no updated values (values are frozen). It is visible.
LN: Current transformer Name: TCTR
For a description of this LN, see IEC 61850-5. The current is delivered as sampled values. The sampled values are transmitted as engineering values, i.e. as “true1’ (corrected) primary current values. Therefore, the transformer ratio and the correction factors are of no interest for the transmitted samples, but for maintenance purposes of an external conventional (magnetic) transducer only. In addition, status information is provided and some other settings are accepted from the LN TCTR.
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TCTR class |
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Data object name |
Common data class |
Explanation |
T |
М/О/ c |
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LNName |
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The name shall be composed of the class name, the LN-Prefix and LN- Instance-ID according to IEC 61850-7-2, Clause 22. |
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Data objects |
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Descriptions |
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EEName |
DPL |
External equipment name plate |
|
о |
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Status information |
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EEHealth |
ENS |
External equipment health |
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о |
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OpTmh |
INS |
Operation time |
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О |
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Measured and metered values |
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AmpSv |
SAV |
Current (sampled value) |
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С1 |
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Settings |
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ARtg |
ASG |
Rated current |
|
О |
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HzRtg |
ASG |
Rated frequency |
|
О |
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Rat |
ASG |
Winding ratio of an external current transformer (transducer) if applicable |
|
О |
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Cor |
ASG |
Current phasor magnitude correction of an external current transformer |
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С2 |
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AngCor |
ASG |
Current phasor angle correction of an external current transformer |
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С2 |
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CorCrv |
CSG |
Curve phasor magnitude and angle correction |
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С2 |
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Condition C1: The data object is mandatory if the data object is transmitted over a communication link and therefore it is visible. Condition C2: If there are two or more correction pairs necessary, CorCrv should be used. |
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LN: Distance Name: TDST
Logical node TDST shall be used to represent a measurement of the distance to an object that can move. It is intended to provide a measurement between a fixed location and a movable object. .
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TDST class |
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Data object name |
Common data class |
Explanation |
T |
Ml QIC |
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LNName |
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The name shaH be composed of the class name, the LN-Prefix and LN- Instance-ID according to IEC 61850-7-2, Clause 22. |
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Data objects |
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Descriptions |
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EEName |
DPL |
External equipment name plate |
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0 |
Status information
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TDST class |
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Data object name |
Common data class |
Explanation |
T |
Ml O/C |
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EEHealth |
ENS |
External equipment health |
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0 |
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Measured and metered values |
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DisSv |
SAV |
Distance [m] |
|
C |
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Settings |
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SmpRte |
ING |
Sampling rate setting |
|
О |
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Condition C: The data object is mandatory if the data object is transmitted over a communication link and therefore it is visible. |
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LN: Liquid flow Name: TFLW
Logical node TFLW shall be used to represent a measurement of media flow rate through the device where it is located.
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TFLW class |
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Data object name |
Common data class |
Explanation |
T |
Ml O/C |
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LNName |
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The name shall be composed of the class name, the LN-Prefix and LN- Instance-ID according to IEC 61850-7-2, Clause 22. |
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|
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Data objects |
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Descriptions |
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EEName |
DPL |
External equipment name plate |
|
о |
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Status Information |
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EEHealth |
ENS |
External equipment health |
|
0 |
|
Measured and metered values |
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FlwSv |
SAV |
Liquid flow rate [m3/s] |
|
c |
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Settings |
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SmpRte |
ING |
Sampling rate setting |
|
0 |
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Condition C: The data object is mandatory if the data object is transmitted over a communication link and therefore it is visible. |
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LN: Frequency Name: TFRQ
Logical node TFRQ shall be used to represent a measurement of frequency. It is intended for any frequency that is not related to electrical a.c. measurements. It can be used for example for sound measurements, vibrations and timing of repeated occurrences. If a pure vibration is to be measured, where the movement rather than the frequency is of interest, the TVBR logical node is recommended.
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TFRQ class |
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Data object name |
Common data class |
Explanation |
T |
Ml O/C |
|||
|
LNName |
|
The name shall be composed of the class name, the LN-Prefix and LN- Instance-ID according to IEC 61850-7-2, Clause 22. |
|
|
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Data objects |
|||||||
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Descriptions |
|||||||
|
EEName |
DPL |
External equipment name plate |
|
о |
|||
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Statusinformation |
|||||||
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EEHealth |
ENS |
External equipment health |
|
о |
|||
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Measured and metered values |
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HzSv |
SAV |
Frequency [Hz] related to non-electrical values |
|
с |
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TFRQ class |
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Data object name |
Common data class |
Explanation |
T |
М/ o/c |
|||
|
Settings |
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SmpRte |
ING |
Sampling rate setting |
|
0 |
|||
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Condition C: The data object is mandatory if the data object is transmitted over a communication link and therefore it is visible. |
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