Sel 2414 - Page 103

5.35
Date Code 20130214 Instruction Manual SEL-2414 Transformer Monitor
Metering and Monitoring
Monitoring
Thermal Event Report Function (THE n Command)
Whenever a thermal alarm condition is set (load conditions are Warning 1, Warn-
ing 2, or Warning 3), the SEL-2414 saves a snapshot of the thermal status of the
transformer(s) in nonvolatile memory. The five most recent thermal events are
saved. If the command for retrieving the nth saved thermal event report is THE n,
where n is a number from one to five, THE 1 will display the most recent event
report while THE 5 will display the oldest thermal event report. The format and
data for the THE n report are the same as for the THE report.
Hourly Profile Data Report (THE H Command)
The SEL-2414 stores the following data on an hourly basis for the last 72 hours.
The data are stored at the beginning of each hour. The format of the retrieved data
report is suitable for display in Microsoft
®
Excel
®
. The format for the THE H
report is shown in the following screen capture and Table 5.16 defines the quanti-
ties.
=>>THE H <Enter>
SEL-2414 Date: 03/31/2009 Time: 10:00:00
DEVICE
Transformer 1
Ambient Calc Measured Load
Date Time Temp Top-Oil Top Oil Hot Spot Current FAA
03/31/2009 0800 15.0 58.4 59.9 94.6 0.96 0.90
03/31/2009 0900 15.0 58.4 59.9 94.6 0.96 0.90
Transformer 2
Ambient Calc Measured Load
Date Time Temp Top-Oil Top Oil Hot Spot Current FAA
03/31/2009 0800 15.0 59.2 60.1 95.0 1.00 0.95
03/31/2009 0900 15.0 59.2 60.1 95.0 1.00 0.95
Transformer 3
Ambient Calc Measured Load
Date Time Temp Top-Oil Top Oil Hot Spot Current FAA
03/31/2009 0800 15.0 61.6 61.0 95.4 1.01 0.96
03/31/2009 0900 15.0 61.6 61.0 95.4 1.01 0.96
=>>
Daily Profile Data Report Function (THE D Command)
The device stores the following on a daily basis (at midnight) for the last 90 days.
The format of the retrieved data report is suitable for display in Microsoft Excel.
The format for the THE D report is shown in the following screen capture and
Table 5.17 defines the quantities.
Table 5.16 Hourly Profile Quantities
Quantity Description
Ambient Temp One-hour average ambient temperature
Calc Top-Oil One-hour average calculated top-oil temperature
Measured Top-Oil One-hour average measured top-oil temperature
Hot Spot One-hour average winding hot-spot temperature
Load Current One-hour average per-unit load current
FAA One-hour average insulation aging acceleration factor (FAA)