AC Voltage Reference Phase Shift Tool

Description

Preserve magnitude and return phaseDegrees-referenceShiftDegrees wrapped modulo 360.

Sinusoidal electrical calculations need a common frequency, phase reference and RMS or peak convention. Phasor sums, complex power and composite RMS describe different operations; a sign label alone does not establish a physical connection or waveform.

Preserve magnitude and return phaseDegrees-referenceShiftDegrees wrapped modulo 360.

When to use this tool

Use AC Voltage Reference Phase Shift when checking a stated phasor, power or RMS convention.

How to use the tool and how it works

Enter magnitude, phaseDegrees, referenceShiftDegrees. Use the units and conventions below.
Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
Read magnitude, phaseDegrees. Use the output convention below.

Require nonnegative magnitude. Preserve magnitude and return phaseDegrees-referenceShiftDegrees wrapped modulo 360.^[1]

Input field	Meaning and units	Accepted input
magnitude	Magnitude	Required. Finite number; minimum 0.
phaseDegrees	Wrapped phase angle in degrees under the supplied reference convention.	Required. Finite number.
referenceShiftDegrees	Reference Shift Degrees	Required. Finite number.

Output field	Interpretation	Returned shape
magnitude	Magnitude	Required. Finite number.
phaseDegrees	Wrapped phase angle in degrees under the supplied reference convention.	Required. Finite number.

json

{
  "input": {
    "magnitude": 120,
    "phaseDegrees": 30,
    "referenceShiftDegrees": 90
  },
  "output": {
    "magnitude": 120,
    "phaseDegrees": 300
  }
}

Limitations and assumptions

The reference shift is subtracted. This relabels one phasor without changing frequency or magnitude; zero magnitude still receives an arbitrary phase label.
Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.

Alternative or Complementary methods

Use compatible measured waveforms and a complete circuit or harmonic model when signals are distorted, references differ or practical limits matter.

References

Calculation and input contract: electricity/ac-voltage-reference-phase-shift — tool.io

Similar or alternative tools

Phasor Phase Sign Reference Inversion
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Series Rl Impedance Phase Component
reactance = angularFrequency*inductance; magnitude = hypot(resistance,reactance); phaseRadians = atan2(reactance,resistance).