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This spreadsheet includes all of the necessary calculations for determining the correct cable 2 USING THE CALCULATOR On the Voltage Drop Calculator main page, you can: Click “New Project” at the bottom or “New” on top to begin a new project, Click “Open Project” at the bottom or “Open” on top to open a saved project. There are two version: 1. I could use an example to explain choosing the correct value and getting an answer similar to the online value. 1. The link to the software version is buried deeper. Determine the voltage drop of a 380V, 3 phase circuit with a current of 100A and a length of 150 m and a conductor size of 35 mm. V. 141-1993 V D = KI (R cos ф+ X sin ф) Where: V D –Voltage drop (volts) K –multiplying constant (2 for single phase, 𝟑 𝐡 𝐡𝐚 ) I –current flowing in conductor (amperes) R –line resistance of conductor (ohms) Register for free training to help your teams learn more about our products. 802 x 100 /1000 Copyright 1999-2019 Dan Dudley Ohms Law & Voltage Drop Practice Questions. Power factor 7. This voltage drop calculator is based on public domain formulae and will provide an approximate value for use in project design. Percentage of Voltage Drop Calculation Using Excel. 03 Volts First, I decided to use 240 volt lamps, and 3% voltage drop = 7. xls - Free download as Excel Spreadsheet (. 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