Power Factor Correction Calculation Reference Card
Free download · 85 × 54mm (credit card size)
Power factor correction capacitor sizing is one of the most common calculations in industrial electrical design. This pocket card provides the essential formulas and lookup tables. The front covers the reactive power formula Q = P × (tan φ1 − tan φ2), capacitor current Ic = Q / (√3 × Un) for three-phase, a cos φ correction factor table from 0.70 to 0.95 target PF with kVAr/kW multipliers, and the economic PF target (≥0.90 per most utility tariffs). The reverse covers harmonic derating for capacitors (reduce rating by 10% per 5% THD), anti-resonance rules for 5th/7th harmonic avoidance, and transformer loss reduction with PF improvement. QR links to ECalPro Motor Calculator.
What's Included
How to Print
- ●Recommended paper: 250–300gsm cardstock
- ●Print double-sided, flip on short edge
- ●Cut along crop marks with a paper trimmer
- ●Laminate with 80–125 micron pouches for durability
- ●Fits in wallet, toolbox, or pocket
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Frequently Asked Questions
What paper should I print this on?
Print on 250–300gsm cardstock for durability. Use duplex (double-sided) printing and cut along the crop marks. Laminate with 80–125 micron pouches for long-term site use.
Can I distribute this to my team?
Yes. All ECalPro reference cards are free to download, print, and distribute within your organization. Keep the ECalPro branding and QR code intact.
What standard does this reference?
This card references IEC 60364-8-1 for energy efficiency in electrical installations and IEEE 1459 for power measurement definitions.
How often is this updated?
Updated when power quality or energy efficiency standards are revised. Formulas are fundamental and rarely change.