Transformer UPS Capacity Calculator
Provides a preliminary comparison of UPS apparent load and reserve-adjusted transformer demand against an entered transformer capacity.
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Transformer kVA, primary current, secondary current, impedance, inrush, K-factor, generator sizing, and UPS capacity.
Published Calculators
Transformer Short Circuit Contribution Calculator
Provides a preliminary transformer-limited fault-current estimate from transformer kVA, secondary voltage, phase model, and percent impedance.
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Transformer Service Factor Calculator
Provides a preliminary comparison of entered load kVA with a service-factor-adjusted transformer capacity when the factor is documented for the exact equipment and duty.
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Transformer Secondary Current Calculator
Provides a preliminary transformer secondary line-current estimate from rated kVA, secondary voltage, and a single-phase or balanced three-phase model.
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Transformer Primary Current Calculator
Provides a preliminary transformer primary line-current estimate from rated kVA, primary voltage, and a single-phase or balanced three-phase model.
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Transformer Inrush Duration Calculator
Calculate the cycles and seconds for a simplified transformer inrush current to decay from an initial multiplier to an entered target multiplier.
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Transformer Percent Impedance Test Calculator
Provides a transformer percent-impedance estimate from test voltage on the rated winding after confirming that test current matches the rated-current basis.
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Transformer Harmonic Heating Calculator
Calculate total RMS current and a THD-weighted transformer stray-loss factor from fundamental current, current THD, base stray loss, and an entered weighting multiplier.
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Transformer Grounding Resistor Calculator
Calculate neutral-grounding-resistor resistance, fault power, fault energy, and current-rating margin from entered voltage, fault current, and clearing duration.
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Transformer Generator Coordination Calculator
Compare transformer load with entered generator kVA and kW ratings, showing capacity margins and the limiting utilization.
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Transformer Delta-Wye Voltage Calculator
Calculate ideal secondary line-to-line and line-to-neutral voltage from primary line voltage, turns ratio, and the selected delta or wye connection.
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Transformer Cooling Load Calculator
Convert transformer losses and operating assumptions into adjusted heat load, BTU per hour, cooling tons, and daily heat energy for HVAC coordination.
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Transformer Bank Capacity Calculator
Calculate combined transformer-bank nameplate capacity, usable capacity, and reserved capacity for identical units under an entered utilization assumption.
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Transformer Tap Voltage Calculator
Calculate no-load secondary voltage at a signed tap position and identify the nearest listed tap for a target voltage.
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Transformer Losses Calculator
Calculate total transformer loss, input power, and efficiency from core loss, load loss, and output power.
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Transformer Regulation Calculator
Calculate transformer voltage regulation and voltage difference from no-load and full-load measurements.
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Transformer K-Factor Calculator
Calculate transformer K-factor from a harmonic current spectrum using an explicit reference basis.
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Transformer Efficiency Calculator
Calculate transformer efficiency from measured input and output power, including efficiency percentage and power loss.
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Transformer All-Day Efficiency Calculator
Calculate time-weighted transformer efficiency and daily energy values from entered loss data and a load profile.
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Power Quality Crest Factor Calculator
Summarize peak-to-RMS waveform behavior before a broader power-quality review.
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Voltage Sag Calculator
Estimates voltage sag and remaining voltage from system voltage, available fault current, and a load-current step for initial power-quality review.
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Transformer Voltage Drop Calculator
Estimates transformer voltage regulation, voltage drop, and loaded secondary voltage from nameplate resistance, reactance, load level, and power factor.
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Transformer Voltage Ratio Calculator
Compares primary and secondary voltage values into ideal transformer voltage ratio and inverse voltage relationship.
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Transformer Inrush Current Calculator
Estimates transformer rated current and planning inrush current from kVA, voltage, phase, and a documented inrush multiplier.
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