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Level 3 Engineering Principles - AC Circuits Info and Equations

<br><br><br>https://engineers.academy/product/l3-nd-engineering-principles-exam-preparation/<br><br>Level 3 Engineering Principles - AC Circuits Info and Equations<br><br>

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Level 3 Engineering Principles - AC Circuits Info and Equations

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  1. LEVEL 3 ENGINEERING PRINCIPLES - AC CIRCUITS INFORMATION AND EQUATIONS Waveform Characteristics Waveform Characteristics A = amplitude / peak value P2P = peak to peak value T = periodic time (s) f = frequency (Hz) = 1/T O = offset φ = phase angle (degrees / rads) AC Waveform Average and RMS Values Waveform Average Root Mean Square (RMS) Sinusoidal RMS =Peak Value Ave =2 π× Peak Value √2 Square / Rectangular Ave = Peak Value RMS = Peak Value Saw Tooth RMS =Peak Value Ave =Peak Value 2 √3 Triangular RMS =Peak Value Ave =Peak Value 2 √3

  2. Reactance and Impedance Equations Subject Equation Variables and Units 1 XC = capacitative reactance in Ohms (Ω) Capacitative Reactance (Capacitor) XC= 2πfC f = supply frequency in Hertz (Hz) Inductive Reactance (Inductor) XL= 2πfL C = capacitance in Farads (F) XL = inductive reactance in Ohms (Ω) R =VRMS Passive Resistance - AC (Resistor) IRMS L = inductance in Henries (H) R = resistance in Ohms (Ω) 2+ R2 Z = √XC Total Impedance (Resistor and Capacitor in Series) VRMS = root mean square voltage in Volts (V) ϕ = tan−1(−XC IRMS = root mean square current in Amps (A) R) Z = total impedance in Ohms (Ω) 2+ R2 Z = √XL Total Impedance (Resistor and Inductor in Series) φ =phase angle in degrees / radians ϕ = tan−1(XL R) Z = √(XL− XC)2+ R2 Total Impedance (Resistor, Capacitor and Inductor in Series) ϕ = tan−1(XL− XC ) R

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