Appendix 1Useful Formulas
Ohm’s law: V (volts) = I (amps) × R (ohms)
Single-phase AC power = V (volts) × I (amps) × Power factor
Three-phase AC power = V (volts) × I (amps) × Power factor × 1.732
Power factor = cosine (phase angle) × 100
= Power (watts) ÷ [V (volts) × I (amps)]
Apparent power (watts) = V (volts) × I (amps)
Vpeak = Vrms × l.414
Vrms = Vpeak × 0.7071
Inductive reactance = XL (ohms) = 2πfL, where XL is the inductive reactance, π is pi (3.14), f is the frequency in hertz, and L is the inductance in henrys
Capacitive reactance = XC = 
, where XC is the capacitive reactance, f is the frequency, and C is the capacitance in farads
Series ...
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