over load current calculator
Calculate overload current using I OL =I FL*SF, where I FL is full-load current and SF is the service factor or overload multiplier.
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electrical overload calculator
In a calculation of overload current, a full-load current multiplied by service factor or overload percent addition is the right way.
Formula & Table Summary:
Formulas
- Using SF: \( I_{OL} = I_{FL} \times SF \)
- Using %OL: \( I_{OL} = I_{FL} \times (1 + \frac{\%OL}{100}) \)
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overload protection current
The Overload Current Calculator determines the overload current limit to which overload protection trips,
IOL = IFL x SF or
IOL = IFL (1 + %OL/100).
overload trip setting calculator
| IFL (A) | SF | %OL | Calculation | IOL (A) |
|---|---|---|---|---|
| 10.0 | 1.10 | — | 10 × 1.10 | 11.0 |
| 12.5 | 1.15 | — | 12.5 × 1.15 | 14.375 |
| 15.0 | — | 20% | 15 × 1.20 | 18.0 |
| 8.0 | — | 25% | 8 × 1.25 | 10.0 |
| 20.0 | 1.25 | — | 20 × 1.25 | 25.0 |
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Frequently Asked Questions - over load current calculator:
Multiply full-load current by service factor or by (1 + overload%/100).
The current drawn by a motor or device at its rated load and voltage.
A multiplier indicating how much over the rated load a motor can operate without damage.
Common values range from 1.0 to 1.25.
Set it slightly above full-load current, based on SF or manufacturer data.
The device may not trip in time, risking overheating and damage.
Nuisance tripping may occur during normal operation.
No, overload is sustained overcurrent; short-circuit is a fault current many times higher.
Yes, sustained overload causes overheating and insulation breakdown.
Thermal overload relays, circuit breakers, and fuses.
