Neara is capable of performing voltage drop calculations for underground designs that take into account the following parameters:
Voltage of substation
Impedance of cable
ADMD of load
Power factor of load(only for statistical method)
Standard deviation of load (only for statistical method)
Two methods of calculating voltage drop are available: simple and statistical.
Simple voltage drop
Simple voltage drop is calculated through a combination of ADMD loads and pre-defined diversity factors. A worked example can be found in Annexure B of NS110.
This method is only valid for radial networks and cannot be used to analyze networks containing loops or rings.
Statistical voltage drop
Statistical voltage drop is calculated according to the method described in the paper: A Statistical Method for Analysing L.V. Distribution Networks by Kent A. Gosden.
Changing the voltage drop method
Select Project menu > Design settings:
On the Settings popup, select the Voltage Drop Mode:
How to access voltage drop
Open the Report Manager tab. If it's not visible in your workspace, click the (+) next to a tab and choose Report Manager on the popup:
On the Report Manager panel, click New custom report and in the popup set Datasource to Pillars. Give the report a meaningful name:
The report table will load in a new tab. Scroll to the far right of the table to view the voltage drop columns:
To visualize the results in the design in the Perspective view, click on the eye icon in a column's header:
