VFD Sizing Calculator
Use this VFD sizing workflow for early output-current screening when motor FLA, application multiplier, derating factor, and entered VFD rating are known.
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Motor current, full-load current, starting current, power, and starter sizing workflows.
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NEMA Code Letter Calculator
Enter horsepower, voltage, phase, and locked-rotor current to estimate kVA per horsepower and a code-letter range for screening.
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Motor Torque Calculator
Use this motor torque workflow for a power-and-speed estimate. It is not a motor selection, starting-torque, gearbox, or nameplate calculation.
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Motor Voltage Drop Calculator
Use this motor voltage-drop workflow when you want separate running and starting-current voltage-drop estimates for a motor circuit.
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Motor Overload Calculator
Use this motor overload workflow for early setting arithmetic when motor nameplate FLA, setting percentage, entered setting, voltage, and phase are known.
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Motor Slip Calculator
Use this motor slip workflow for a basic induction-motor speed comparison. It does not infer motor design, load, or equipment condition.
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Motor Disconnect Size Calculator
Use this motor disconnect workflow for early current-rating comparison when motor FLA, multiplier, entered disconnect rating, voltage, and phase are known.
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Motor Efficiency Calculator
Enter motor input power and output power to calculate the ideal power-ratio efficiency and estimated losses.
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Locked Rotor Current Calculator
Use full-load current and a locked-rotor multiplier to screen locked-rotor amps before checking the motor nameplate, NEMA code letter, starter data, and utility requirements.
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Motor Starter Current Reference Calculator
Enter motor nameplate FLA and transparent project assumptions to estimate starting current, an overload reference current, and a starter continuous-current discussion basis. This tool is not a starter selection, not an overload setting, and does not select a compliant starter, overload relay, breaker, conductor, disconnect, controller, SCCR, or equipment rating.
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Motor Starting Current Calculator
Use full-load current and a user-selected starting multiplier to screen motor starting current before checking nameplate, controller, utility, and manufacturer data. This is not locked-rotor current, not a NEMA code-letter conversion, and not a starter selection.
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Motor Power From Current Calculator
Enter line current, system voltage, phase count, power factor, and motor efficiency to create a transparent U.S. English current-to-power estimate. This calculator is not a full-load-current lookup, not a motor-nameplate substitute, does not reproduce NEC motor tables, does not apply NEMA design or code-letter data, does not select equipment, and does not verify code compliance.
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