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# Power, reactive and apparent power and power factor calculations

## Explanation of the power calculator programs for Ti84 :ONEPHASE.8XP

### definitions

The calculation of power, power factor, reactive power and current is a very important subject in Electrical Engineering.

4 Different inputs in this Ti program are possible.

Definitions according to electrical network theory.

Formulas : Pc=U.I *= complex power, I*= conjugate, definition conjugate: (a+bi)*=(a-bi)

abs(Pc)=apparent power (Va)=Pa,

Re(Pc)= real power (Watt)=Ptrue,

Im(Pc)=reactive power (Var)= Pr

cos(ϕ) or power factor (pf)= (real power)/(apparent power)=Ptrue/Pa

Download the program

onephase.zip

## Explanation of the Power Calculator Programs for the Ti84 : program P1PHASE.8xp

This program calculates real power, apparent power, cosfi, etc. for different input options of the current. The examples show the options. The difference between positive and negative blind power is accentuated.

Download the program.

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