| summary | Span Monitoring The span monitoring page provides insight into the real-time condition and historical performance of a specific power line span.The span monitoring page contains information on loading, wire temperature, dynamic line rating, sag, clearance, and weather parameters for a specific line-span. The page can also be used to view historical data and performance of the individual phases on the line-span. How to use The span monitoring page provides you with real-time and historical data from a specific span, allowing the user to easily drill down into the performance of a line and identify problems related to a specific span-phase. The span page is used to Compare data from different phases on the same span, allowing the user to identify differences in temperature, load, sag or clearance. Find critical spans; Use weather data and observations to understand when and why the span is a bottleneck for the powerline.Export data for analysis and comparison with other spans or for integration into other systems. Contents Span PlotThe span monitoring plot contains measurements for all the neurons on the span if more phases are instrumented. The default values are:Current (A): The measured current on the spanWire temperature (℃): The measured temperature on the spanHP Dynamic Line Rating (A): The valid ampacity of the span Use the menu to select different values from each phase and DLR models from the plot. When looking at longer time intervals, the data automatically aggregates values.Tip: The user can zoom in the plot by clicking and dragging the cursor across the plot. MeteogramThe Meteogram contains weather data for the specific span, allowing the user to compare any observations from the span plot with the environmental conditions. The following parameters can be viewed:Ambient temperature (°C)Precipitation (mm)Wind speed (m/s)Wind direction Span ModelThe sag and clearance plot contains a 2D representation of the respective span. The user can change between the different monitored phases on the span by using the drop-down in top of the plot-window. The red area shows where the line has been hanging in the selected time period, while the black solid line shows the latest measurement. The sag and clearance data can also be viewed as a time series by clicking the button in the top-right corner of the plot window. Definition of Sag and Clearance Sag (𝐷 in the plot) – The vertical distance between the suspension chord (𝑆_1) and the catenary at the point where the tangent of the catenary is parallel to the chord. Clearance – Shortest distance from the catenary and the ground.The "catenary" – shape of a suspended chain hanging under its own weight. |
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