Circuit Breaker Trip Time Calculator
Read actual caller breaker time-current envelope using log-log interpolation only inside supplied observed/rated curve; no invented trip family, fault clearing guarantee, certified protection coordination or conducting a test.
Description
A breaker time-current envelope contains lower and upper trip-time evidence.
A breaker time-current envelope contains lower and upper trip-time evidence. Log-log interpolation is confined to supplied coverage.1
Enter aligned positive strictly increasing current multiples/positive minimum and maximum trip times with at least two points and minimum≤maximum at every point. Query a positive in-range multiple; return interpolated bounds.
When to use Circuit Breaker Trip Time Calculator
Use Circuit Breaker Trip Time Calculator when you need to evaluate the supplied records under the calculation and evidence rules below. No invented trip family, certified coordination, fault-clearing guarantee or test procedure is supplied.
Prepare measured device or circuit evidence with matched frequency, temperature, waveform and calibration conditions. Supply explicit caller ratings and limits.
How to use Circuit Breaker Trip Time Calculator and understand its results
- Prepare measured device or circuit evidence with matched frequency, temperature, waveform and calibration conditions. Supply explicit caller ratings and limits.
- Enter callerCurveCurrentMultiples, callerCurveMinimumTripSeconds, callerCurveMaximumTripSeconds, observedCurrentMultiple using the field table and calculation rules, then run the tool.
- Read curveMinimumTripSeconds, curveMaximumTripSeconds. The explanation below defines the units, signs, ordering and any flags or placeholder values.
- If the tool reports an input issue, correct the values and run it again. Apply the stated assumptions when interpreting a successfully returned result.
| Input field | Meaning | Value type; see rules below | Requirement |
|---|---|---|---|
| callerCurveCurrentMultiples | Caller curve current multiples | list of number | Required |
| callerCurveMinimumTripSeconds | Caller curve minimum trip seconds | list of number | Required |
| callerCurveMaximumTripSeconds | Caller curve maximum trip seconds | list of number | Required |
| observedCurrentMultiple | Observed current multiple | number | Required |
Enter aligned positive strictly increasing current multiples/positive minimum and maximum trip times with at least two points and minimum≤maximum at every point. Query a positive in-range multiple; return interpolated bounds.
time=exp(linearInterpolation(log(currentMultiple),log(time))) Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| curveMinimumTripSeconds | Curve minimum trip seconds | number |
| curveMaximumTripSeconds | Curve maximum trip seconds | number |
{
"input": {
"callerCurveCurrentMultiples": [
2,
4,
8
],
"callerCurveMinimumTripSeconds": [
10,
2,
1
],
"callerCurveMaximumTripSeconds": [
20,
4,
2
],
"observedCurrentMultiple": 4
},
"output": {
"curveMinimumTripSeconds": 2,
"curveMaximumTripSeconds": 4
}
}Limitations and assumptions
No invented trip family, certified coordination, fault-clearing guarantee or test procedure is supplied.
Numeric inputs, where present, must be finite. Follow the calculation-specific rules for overflow, underflow and exceptional cases. Numeric lists are limited to 10,000 entries; string lists to 128 strings of at most 128 characters each. The rules above may impose smaller limits. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors.
Alternative or Complementary methods
Use Fuse Melting Energy Calculator: A fixed-resistance fuse energy model integrates squared current over time. Thermal losses and resistance changes need additional models. For a complementary task, use Optocoupler Isolation Voltage Calculator: Optocoupler working voltage and isolation-test voltage describe different conditions. Test voltage is not a continuous working rating.
References
-
Circuit Breaker Trip Time Calculator — tool.io
Similar or alternative tools
- Fuse Melting Energy Calculator
A fixed-resistance fuse energy model integrates squared current over time. Thermal losses and resistance changes need additional models.
- Optocoupler Isolation Voltage Calculator
Optocoupler working voltage and isolation-test voltage describe different conditions. Test voltage is not a continuous working rating.