Creating Calculation Schedules

This section teaches you how to perform calculations on your electrical system and create fault and voltage drop schedules.

Calculate the Project

Run the Calculate Whole Project command.

DM Electrical-> dmert-calculate-16 Calculate Whole Project

This will perform fault, voltage drop, wire sizing, and other calculations on your entire electrical model. It will also update the labels, graphics, and feeder schedule on the one-line diagram. This process takes a moment.

Create and Modify the Fault Schedule

1.Run the Fault Schedule command. The FAULT CURRENT SCHEDULE will open.

DM Electrical-> dmert-green-s-16 Schedules->Fault

2.Run the Revit Insert command. The Select Fields dialog box will open.

Modify Schedule/Quantities-> revit--insert Insert

3.Make the following changes to the fault schedule:
a.Remove the Short Circuit Rating field from the Scheduled fields list.
b.Add the DMET_Panel_BusAmps and DMET_Panel_Distribution_System fields to the Scheduled fields list.
Design Master shared parameters always begin with DMEN for number types or DMET for text types.
4.Press the OK button to close the dialog box.

The fault schedule will be updated. You can make further changes to the schedule title, field headings, and column order the same way as any other schedule in Revit.

Create and Update the Voltage Drop Schedule

1.Run the Voltage Drop Schedule command. The VOLTAGE DROP SCHEDULE will open.

DM Electrical-> dmert-green-s-16 Schedules->Voltage Drop

The voltage drop at transformer T1 and its downstream panels is probably a little high. That is partly because the voltage drop through transformers is being included by default. This setting can be changed depending upon how you want to calculate voltage drop through a transformer.

2.Run the Project Options command. The Options dialog box will open.

DM Electrical-> dmert-grey-c-16 Customization->Project Options

3.Set Transformer voltage drop calculation method to Ignore transformers.
4.Press the OK button to close the dialog box.
5.Run the Calculate Whole Project command.

DM Electrical-> dmert-calculate-16 Calculate Whole Project

The voltage drop schedule will update to show the new values.

Calculate Part of the Project

1.Run the Panel Edit command. The Panel Edit dialog box will open.

DM Electrical-> dmert-panel-16 Panel Edit

2.Select panel A from the list and set Bus Size / Mains to 60.
3.Select panel B from the list and set Bus Size / Mains to 60.
4.Press the Exit button to close the dialog box.
5.Run the Fault Schedule command. The FAULT CURRENT SCHEDULE will open.
This step is optional, but will make it easier to see the changes.

DM Electrical-> dmert-green-s-16 Schedules->Fault

6.Run the Calculate Part of Project command. The Calculate Part of Project dialog box will open.

DM Electrical-> dmert-calculate-part-16 Calculate Part of Project

7.Select panel DP from the list and press the Calculate button.

Calculations will be performed only on the selected distribution equipment and downstream devices. When the calculation finishes, the fault schedule will update to show the new values.


Page url: http://www.designmaster.biz/support/electricalrt/tutorials/2.0/index.html?schedules.htm
©2018-2021 Design Master Software, Inc