Lineman Calculator Pro
The Power Lineman Electrical Calculator app was designed to aid lineman in determining distribution transformer: turns ratio, full load currents, connections, loads, line currents, phase currents, line voltage, and phase voltages. The Power Lineman Electrical Calculator was primarily developed as a training tool used in transformer training.
The formula for each calculator is displayed on the calculator. This allows the user to understand each calculation. Formulas can be expressed in several ways. These formulas have been expressed by a lineman.
The app can be used in the field to calculate kva loads of single transformers, two transformer and three transformer banks by entering the required data for the desired application. While entering currents in the field of a 4 wire delta or a 4 wire open delta the high leg current should always be equal to or less than the currents on the other two phases. In the diagrams the high leg is indicated as phase c. The high leg phase in a 4 wire delta connection will carry only three phase current. If both single and three phase loads are running at the time of the current checks the high leg phase c will have less current than the other two phases a & b.