|
MEASUR-Tools-Suite v1.0.11
The MEASUR Tools Suite is a collection of industrial efficiency calculations written in C++ and with bindings for compilation to WebAssembly.
|
The multimeter method derives total power from direct electrical measurements using a clamp-on ammeter or multimeter. For single-phase loads, the power is computed as the product of supply voltage, average current, and power factor (scaled to kilowatts). For three-phase loads, the square root of three is applied to account for the phase relationship between voltages and currents.
\begin{equation}\label{eq:electricity-reduction-multimeter-1ph} P = V \cdot I \cdot \mathrm{PF} \cdot 10^{-3}\end{equation}
\begin{equation}\label{eq:electricity-reduction-multimeter-3ph} P = V \cdot I \cdot \mathrm{PF} \cdot \frac{\sqrt{3}}{1000}\end{equation}
| \(P\) | Power draw per load \([\unit{ \kilo\watt}]\) |
| \(V\) | Supply voltage \([\unit{ \volt}]\) |
| \(I\) | Average current measured by the meter \([\unit{ \ampere}]\) |
| \(\mathrm{PF}\) | Power factor (dimensionless, 0–1) \([\unit{ \unitless}]\) |
| \(10^{-3}\) | Conversion factor from watts to kilowatts \([\unit{ \watt\per\kilo\watt}]\) |
| \(\sqrt{3}\) | Phase factor for three-phase systems \([\unit{ \unitless}]\) |
1.9.8