Calculator category
Focused tools for a first pass on backup power & power quality projects.
Backup Power & Power Quality
Applies a manufacturer-provided usable-capacity factor to a generator nameplate rating. No generic altitude or temperature correction is assumed; obtain the factor for the exact...
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Applies a user-selected allowance to the simultaneous DC load current. Verify inrush, ambient derating, redundancy, short-circuit behavior, and manufacturer conditions before selecting a supply.
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A preliminary kVA screen using user-entered running load, motor-starting demand, and allowance. It does not select a generator model or verify transient voltage or...
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Calculates apparent power and displacement power factor from real and reactive power under a sinusoidal steady-state assumption. It does not calculate true power factor...
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Estimates required capacitor-bank kvar to move a load from an entered initial power factor to a target power factor, and estimates three-phase line current...
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Estimates three-phase symmetrical RMS bolted fault current at transformer terminals using transformer full-load current and percent impedance, assuming an infinite upstream source and neglecting...
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An idealized energy estimate from nominal battery energy, user-entered usable fraction, efficiency, and load. Actual runtime depends on manufacturer discharge curves, cutoff voltage, discharge...
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Calculates connected load in watts and apparent load in VA, then applies a user-selected planning allowance. Product selection must also satisfy the UPS manufacturer's...
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