PE Power study guides
One short guide for each knowledge area of the exam. Each covers what the area asks, the methods worth knowing cold and the mistakes that cost points, then points to free sample questions and the calculators that fit.
Circuit Analysis
10–15 questions on the exam
Phasors, three-phase Y and delta, per-unit and change of base, symmetrical components and the power triangle: what to master and how to practise it.
Questions in review
Protection
10–15 questions on the exam
Overcurrent coordination, CTs and saturation, differential and distance relaying, fuses and reclosers, and breaker duty with X/R: a practical study path.
Questions in review
Transmission and Distribution
8–12 questions on the exam
Line models, voltage drop and regulation, power transfer and angle, reactive compensation, fault current and stability: a study path for T&D.
Questions in review
Electric Power Devices
8–12 questions on the exam
Transformer equivalent circuits, percent impedance, regulation, parallel and autotransformer operation, efficiency, and storage and PV ratings explained.
Questions in review
General Applications
8–12 questions on the exam
Demand and load factor, the lumen method, grounding electrodes, surge arrester MCOV and protective margin, and present-worth economics in one study path.
Questions in review
Measurement and Instrumentation
6–9 questions on the exam
Instrument transformer ratios and meter multipliers, accuracy classes, the two-wattmeter method, meter loading and true RMS: how to study measurement.
Questions in review
Rotating Machines
5–8 questions on the exam
Induction motor slip and torque, locked-rotor current and starting methods, synchronous machine power angle and excitation, and DC motor speed control.
Questions in review
Power Electronics
5–8 questions on the exam
Six-pulse rectifiers, inverters and PWM, displacement and distortion power factor, harmonics and THD, and how inverter-based resources behave in faults.
Questions in review
Electrical Safety has no guide yet. Its questions wait for an NEC review by a professional engineer, and the guide follows them.