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Motor Voltage Drop Calculator
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This program calculates voltage drop caused by the starting of motors at the substation transformer primary and secondary leads.
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Primary system impedance and transformer impedance is taken into account. Secondary conductor impedance is not.
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Calculator allows use of a autotransformer reduced voltage starter and provides calculations based on tap setting.
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Two calculators are provided. One is based on tables 430-150 & 430-151(B) from the 1999 NEC. The tables provide current ratings for motors up to 500HP and 575 Volts. The other allows full use of motor nameplate data.
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