AGL CCR Input Power and Energy Calculator
Estimate CCR input power, apparent and reactive power, annual energy and running cost from output load, efficiency and power factor.
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Estimate only. Not engineering or safety advice. Check the result against the applicable standard and the equipment data, and have a competent engineer review it before it is relied on. Terms of use.
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About this calculator
Use this to turn a constant current regulator output load into the power it takes from the supply, and into energy and running cost over a year at the hours and tariff you enter.
Limits of this calculator
Efficiency and input power factor are held constant at the load entered. Both fall at light load and low brightness steps, so use the data sheet figures for the step you are costing, cost each step separately and add them. This covers the regulator input only.
Cross-check: 25 reference cases, calculated from textbook formulas coded separately from the engine by the same author, agree with this calculator. This is not an independent review.
Verification status: Engineering reference
Engineering reference. Formula and method documented and tested against separately coded reference calculations. Not yet Verified: the evidence listed on this page is still needed.
What this calculator checks
- The arithmetic of the published formula for the values you entered, in the units shown.
What remains unverified
- That the inputs suit your application. Take ratings, resistances and constants from the manufacturer data sheet or project specification.
Verification register entry
| Calculation author | Rahul Sharma (author) |
|---|---|
| Technical review | No independent technical review has been carried out |
| Individual professional approval | Not recorded |
| Formula reference | not recorded |
| Standard and edition | IEC 61820-3-2; FAA AC 150/5345-10H, IEC 61820-3-2:2023; FAA AC 150/5345-10H |
| Standard review state | Public-scope screened; licensed clause review still pending |
| Scope-screening note | AGL series-circuit power-supply and CCR specification context is relevant. The calculator estimates input power, energy and cost from user-entered efficiency and power factor; it does not model CCR loss curves or metering accuracy. |
| Cross-check test cases | 25 reference vectors (tests/reference_vectors.json) |
| Review date | not recorded |
| Next review date | not recorded |
| Status | Engineering reference |
Needed before this calculator can be marked Verified: reviewer name, qualification and review date; licensed clause-by-clause standard review; exact formula reference; formula source (textbook or standard); next review date.
Formula
Worked example
| Input | Value |
|---|---|
| CCR output load | 3.713 kW |
| CCR efficiency | 0.9 |
| CCR input power factor | 0.9 |
| Hours of operation per year | 4,380 |
| Energy tariff per kWh | 8 |
- Input power = 3.713 kW / 0.9 = 4.126 kW
- Apparent power = 4.126 / 0.9 = 4.584 kVA, reactive = 1.998 kVAR
- Annual energy = 4.126 kW × 4,380 h = 18,070 kWh
- Cost = 18,070 kWh × 8 = 144,559
Assumptions
- Efficiency and power factor are constant at the load entered
- Input power factor is the figure at this load, not at full load
- Hours are for the brightness step entered, so cost each step separately and add them
Regulator efficiency and input power factor both fall at light load and low brightness steps, so use the data sheet figure for the step you are costing. This is energy for the regulator input only.
Inputs and results
| Input | Unit | Allowed or shown | Note |
|---|---|---|---|
| CCR output load | kW | greater than 0 kW | Circuit load from the CCR sizing calculator, at the brightness step you are costing |
| CCR efficiency | (number) | greater than 0.5, up to 1 | From the CCR data sheet at this load and brightness step |
| CCR input power factor | (number) | greater than 0, up to 1 | From the CCR data sheet at this load and brightness step |
| Hours of operation per year | (number) | greater than 0, up to 8,760 | At this brightness step |
| Energy tariff per kWh | (number) | 0 or more | In your own currency |
| Result | Unit | Allowed or shown | Note |
|---|---|---|---|
| CCR input power | kW | Shown to 3 decimal places | |
| CCR input apparent power | kVA | Shown to 3 decimal places | |
| CCR input reactive power | kVAR | Shown to 3 decimal places | |
| Annual energy | kWh | Shown to 0 decimal places | |
| Annual running cost | (number) | Shown to 0 decimal places |
How it is calculated
Each input is converted to the base unit of its quantity, the formula above is applied in the order shown in the worked example, and each result is shown in the unit you choose. Results are held at full precision and rounded only for display, except where a step selects a standard size, as the worked example shows. A value outside its allowed range is refused with a message instead of giving a result.
Typical values
| CCR output load (kW) | CCR input power (kW) | CCR input apparent power (kVA) | Annual energy (kWh) | Annual running cost |
|---|---|---|---|---|
| 4 | 4.444 | 4.938 | 19,467 | 155,733 |
| 7.5 | 8.333 | 9.259 | 36,500 | 292,000 |
| 10 | 11.111 | 12.346 | 48,667 | 389,333 |
| 15 | 16.667 | 18.519 | 73,000 | 584,000 |
| 20 | 22.222 | 24.691 | 97,333 | 778,667 |
| 30 | 33.333 | 37.037 | 146,000 | 1,168,000 |
Other inputs are the same as in the worked example above.
Standards and further reading
- ICAO Annex 14, Volume I (aerodrome design and operations)
- ICAO Doc 9157, Part 5 (aerodrome design manual, electrical systems)
Photometric and circuit requirements come from the edition of Annex 14 and the regulator's rules that apply at your aerodrome, and from the fitting and regulator manufacturers' data. These are named as background reading. Elecmetric does not embed clause text or rating tables, and the reviewer record for this calculator is separate from this list.
Frequently asked questions
What do I need to enter?
Enter cCR output load, cCR efficiency, cCR input power factor, hours of operation per year and energy tariff per kWh. Change the unit of a value with its selector and the result stays the same.
Why cost each brightness step separately?
Output load, efficiency and power factor differ at each step, and the hours at each step differ. Run the calculation once per step and add the results.
What efficiency should I enter?
Use the regulator data sheet figure at the load and brightness step you are costing, not the full-load figure.
Does the result include the lamps and cables?
The output load you enter is what the regulator supplies, so it already includes them. The result adds only the regulator losses.
How accurate are the results?
Every figure comes from the same tested engine as the Elecmetric calculators and is meant for estimating. 25 reference cases, calculated from textbook formulas coded separately from the engine by the same author, agree with this calculator. This is not an independent review. Check design values against the standard and the equipment data you work to.
Formula guides and reference
Longer explanations with worked examples and tables, written for the same topic.
- AGL CCR Input Power and Energy Formulas: AGL CCR energy formulas: the input power, apparent power and reactive power of a constant current regulator
- Power Factor and the Power Triangle: Power factor formulas: kW, kVA and kVAR from the power triangle, capacitor kVAR to raise power factor
- Energy and Cost Formulas: kWh and Payback: Energy and cost formulas for kWh from power and hours, running cost, efficiency and payback of an upgrade
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