Electrical Voltage Parameters - Need help with Voltage Values

Revit
1

Hello,
I am working on an electrical calculation that pulls data from shared and system parameters from “Electrical Circuits” category. Dynamo is able to pull all of the necessary information, I am able to process everything I need, however I cannot get the resulting voltage to place without converting:

Example: Resulting voltage to be placed in “TP DYN - ACCUM VOLT DROP” shared parameter reports as 4.19V in Dynamo (correct value) and when looking at the schedule in Revit, it reads 0.4V. Same with the sample circuit voltage I pulled reads “5166.67…” for 480V.

I am quite new to Dynamo, does anyone know if I am overlooking how Dynamo reads voltage / conversions?

Thank you!

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2

Hi Shane,
There is a custom node from “Lunch Box” package called “LunchBoxGetParameter” use that node to get actual values 480 V.

3

That worked perfectly for reading the values, Is there a known way to now place number values to an “Electrical Potential” type parameter in Revit?

The one I am struggling with is the 4.19 number calculated in Dynamo that needs to get back to Revit as 4.19V.

Thank you!

4

Add code block and do the below changes before “Element.SetParameter” node.

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5

Thanks again.
From my testing, the multiplier does not seem to be a constant for different voltages. My solution is not ideal, but what I ended up doing is making the parameter unit-less in Revit and used a calculated value to convert to volts (multiplied by a 1V parameter) and divide out for resulting percent in Revit. If anyone knows of something that works with voltage units, I am sure we will end up running into this issue again without an available work-around.

6

You can try to convert the values with a python node with this content:

import clr
clr.AddReference('RevitAPI')
from Autodesk.Revit.DB import *

OUT = UnitUtils.ConvertFromInternalUnits(IN[0],DisplayUnitType.DUT_VOLTS)
7

Read this for issues with Voltage and other units in Revit.