Conductors
Select the Environments menu item, and on the pop-out scroll down to see the Derating Factors section at the bottom:
Add derating factors
Click Add Derating Factor underneath the table - a new row will be added. For this example:
Enter ConductorA for the Name
Select Variable under Factor. Variable are added to the Strength States table allowing you to specify a value for each strength state; Constant allows you to provide a number directly.
Select the Tag(s) to apply to this conductor. In this case, add a new tag called conda by typing that into the box and selecting the option to add a new tag with that label:
Repeat those steps to add a second row for ConductorB with tag condb:
Since ConductorA and ConductorB are Variable derating factors, they have automatically been generated in the Strength States table:
The default Conductors derating factors in the Strength States table are set to 1 so that they do not compound. You might need to update their values for different Strength States, for example:
Serviceability is our sustained condition; and Strength is our extreme condition. If you look at the Environments table above, you'll see that these have been attached to our sustained (e.g. every day) and strength (e.g. max wind) environments:
Tag conductors
Click anywhere outside the Simulations pop-out to dismiss it, and then select Library menu > Conductors to view the Conductors popup. Tag each conductor as appropriate with the conda and condb tags to ensure it is being analyzed with the correct strength states. To add tags to a conductor, click in the Tags box in that conductor's row:
View the analysis
Dismiss To view the analysis, select the Move & Select tool on the toolbar, click on a span, and then select the General tab in the Properties panel in the sidebar:
To view the derating factor for that span, scroll down under the General tab to the Tension in Environments section:
Clicking on the Env Max value in the table: this will show where the derating factor is coming from:
By adding multiple tags to a single conductor the derating factor can be compounded to a very small number:
Poles
The process for adding to poles is similar. Follow the steps above to create and add the derating factors to your desired poles through either the Library or a CSV import.
After he derating factor has been applied to the pole, we can then select a pole and view the Structure tab in the Properties panel in the sidebar to see its impact on pole strength:
Clicking on derated= option in the table will display the exact derating factor being applied. In this case, ConductorB is the same conductor B as created above and as such we are applying a factor of 18%.
You can also choose to add multiple derating factors to a pole.
Crossarms
To add custom derating factors to crossarms, the derating factor must be added via the Components library.
Select Library menu > Components to view the Components library, and search for and select the crossarm for your construction. In the Tags box on the right, choose the desired derating factor:
You can then create a construction with this crossarm and the derating factor will be applied.
Insulators
Insulators can have custom derating factors applied in the Components library in a similar way to crossarms.
In the Construction library, search for and select the insulator to be derated, and set its Tags:
