Peak Fault Current Calculator
Specified IEC peak ip=κ√2Ik,κindependently established from network/RX method; not plain RMS peak or interrupting rating. Actual independently established compatible SI units/model context; conditional arithmetic, not code compliance, engineering design or safe operation approval.
Description
An asymmetrical fault-current peak uses an independently established peak factor in addition to symmetrical RMS current.
An asymmetrical fault-current peak uses an independently established peak factor in addition to symmetrical RMS current.1
This tool evaluates that supplied relation without deriving the factor or selecting an interrupting rating.
When to use Peak Fault Current Calculator
Use this tool to evaluate that supplied relation without deriving the factor or selecting an interrupting rating.
How to use Peak Fault Current Calculator and how it works
- Prepare callerIndependentlyAssessedAsymmetryFactor, actualInitialSymmetricalRmsFaultAmps, with the units, conventions and assumptions below.
- Enter the required fields and run Peak Fault Current Calculator.
- Read result.value using the output definitions below.
- Correct any rejected inputs and rerun; interpret the result within the stated model and its assumptions.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| callerIndependentlyAssessedAsymmetryFactor | Caller Independently Assessed Asymmetry Factor. Use the units and matching context stated in the calculation below. | number | Required; strictly positive; finite; other constraints below |
| actualInitialSymmetricalRmsFaultAmps | Actual Initial Symmetrical Rms Fault Amps. Use the units and matching context stated in the calculation below. | number | Required; nonnegative; finite; other constraints below |
Supply a positive peak factor kappa and nonnegative RMS short-circuit current in amperes. Return kappa*sqrt(2)*RMS current in amperes. The tool does not derive kappa from network resistance and reactance.
peakCurrentAmperes=kappa*sqrt(2)*rmsCurrentAmperes Apply the input ordering, units and branch conditions stated above.
| Output field | Meaning | Value type |
|---|---|---|
| result | Object containing the calculated or selected fields below. | object |
| result.value | Conditional signed or magnitude current in amperes under the tool's stated convention. | number |
{
"input": {
"callerIndependentlyAssessedAsymmetryFactor": 2,
"actualInitialSymmetricalRmsFaultAmps": 10
},
"output": {
"result": {
"value": 28.284271247461902
}
}
}Limitations and assumptions
The calculation uses the supplied observations and model inputs. It does not collect measurements, select a reference population or coefficient, or establish that the model applies to the actual case. The stated branch conditions and output units remain part of the result.
All fields require explicit values. Unexpected fields, wrong types, nonfinite numbers and sparse arrays are rejected. Alignment, bounds and supported-token rules are explained above; extremely large inputs or nonfinite results can also fail. Input errors differ from successful false comparisons, unavailable-domain flags and empty match lists.
Alternative or Complementary methods
Use IEC Short-Circuit Current Calculator for a complementary operation: An initial three-phase symmetrical fault-current relation depends on an applicable voltage factor and positive-sequence impedance.
Use Arc Flash Incident Energy Calculator for a complementary operation: Arc-flash incident energy depends on a method edition, electrode geometry, fault current and protection timing.
References
-
Peak Fault Current Calculator — tool.io
Similar or alternative tools
- IEC Short-Circuit Current Calculator
An initial three-phase symmetrical fault-current relation depends on an applicable voltage factor and positive-sequence impedance.
- Arc Flash Incident Energy Calculator
Arc-flash incident energy depends on a method edition, electrode geometry, fault current and protection timing.