Engineering branch
Electrical Engineering
Electrical engineering entries on AC power, circuit protection, machines, substations, converters, distribution systems, and coordination formulas.
Entries · 45
Topic AC Power Systems AC power systems guide covering RMS values, phasors, active and reactive power, power factor, three-phase and unbalanced circuits, harmonics, grounding, and protection. Topic AI for Power-System Fault Detection Electrical guide to AI-assisted power-system fault detection covering signals, sensors, protection context, machine learning, false alarms, model drift, validation, and deployment. Topic Circuit Analysis and Electrical Protection Electrical circuit analysis guide covering Ohm's law, Kirchhoff laws, Thevenin equivalents, impedance, measurement, insulation, ground faults, breakers, and relays. Topic Electrical Machines and Motor Drive Systems Electrical machines and drives guide covering magnetic flux, AC power, inverters, vector control, harmonics, protection, thermal design, reliability, and validation. Topic Electrical Power Distribution, Substations, and Protection Coordination Electrical guide to power distribution, substations, protection coordination, feeders, grounding, fault studies, arc-flash tradeoffs, transfer schemes, and validation. Topic Power Electronics and Converter Systems Electrical guide to power electronics and converters: rectifiers, DC links, inverters, switching devices, filters, harmonics, thermal design, protection, and validation. Glossary term Admittance The reciprocal of impedance, expressing how easily alternating current flows through a circuit, component, or network. Glossary term Alternating Current Electric current whose magnitude and direction vary periodically with time, most commonly as a sinusoidal waveform in power systems. Glossary term Apparent Power The total power magnitude in an AC circuit, equal to the product of RMS voltage and RMS current regardless of phase angle. Glossary term Capacitance The ability of a component or conductor arrangement to store electric charge for a given voltage difference. Glossary term Circuit Breaker A protective switching device designed to interrupt current under overload, short-circuit, fault, or switching conditions. Glossary term Eddy Current A circulating electric current induced inside a conductor by a changing magnetic field or by motion through a magnetic field. Glossary term Electric Field A vector field describing the force per unit electric charge at a point in space. Glossary term Fault Detection The process of identifying abnormal conditions or faults from measurements, events, models, or diagnostic evidence. Glossary term Grid Stability The ability of an electric power system to remain in synchronism and maintain acceptable voltage and frequency after disturbances. Glossary term Grid-Forming Inverter An inverter control mode or device capability that can establish voltage and frequency for an islanded or weak electric grid. Glossary term Ground Fault An unintended electrical connection between an energized conductor and earth, equipment grounding conductors, or grounded conductive parts. Glossary term Harmonic Distortion Distortion caused by signal or power components at integer multiples of a fundamental frequency. Glossary term Impedance The complex opposition that an electrical circuit presents to alternating current, combining resistance and reactance. Glossary term Inductance The property of an electrical conductor or circuit by which changing current produces magnetic flux and induced voltage. Glossary term Insulation Resistance A measure of how strongly electrical insulation resists leakage current between conductors or between a conductor and ground. Glossary term Joule Heating Heat generation caused by electrical current flowing through a resistive material or conductor. Glossary term Joule Law The law relating electrical current, resistance, time, and heat generated by resistive dissipation. Glossary term Kelvin Bridge A four-terminal resistance bridge used to measure very low resistance while reducing lead and contact resistance error. Glossary term Kirchhoff Laws Two circuit laws expressing conservation of charge at nodes and conservation of energy around closed loops. Glossary term Leakage Current Unwanted or unintended electric current that flows through insulation, devices, or parasitic paths. Glossary term Magnetic Flux The surface integral of magnetic flux density through a defined area, linking magnetic fields to induction and magnetic circuits. Glossary term Multimeter A portable instrument used to measure voltage, current, resistance, and related electrical quantities. Glossary term Ohm Law The relation between voltage, current, and resistance in an ideal linear conductor. Glossary term Overcurrent Protection Protective equipment and coordination used to interrupt current above permitted limits. Glossary term Power The rate at which energy is transferred, converted, delivered, stored, or dissipated in a physical or engineered system. Glossary term Power Factor The ratio of active power to apparent power in an AC circuit, measuring what fraction of the total current-voltage product performs useful work. Glossary term Reactive Power The component of power in an AC circuit associated with energy alternately stored and returned by inductive and capacitive elements, performing no net work. Glossary term Relay An electrically operated switching device used for control, protection, or isolation. Glossary term Surge Impedance The characteristic impedance governing travelling voltage and current waves on a transmission line. Glossary term Thevenin Equivalent A simplified linear circuit model represented by a voltage source and series impedance. Glossary term Uninterruptible Power Supply A power system that maintains electrical supply to a load during short input disturbances or outages. Glossary term Vector Control A motor control method that independently controls magnetic flux and torque-producing current components. Glossary term Wheatstone Bridge A four-resistor bridge circuit used to detect or measure small resistance changes through differential voltage imbalance. Glossary term Wye-Delta Transform A circuit transformation between equivalent three-terminal star and delta networks. Glossary term Y-Parameters The admittance-parameter representation of a linear two-port electrical network. Formula sheet AC Power Formula Sheet AC power formulas for RMS values, phasors, impedance, power factor, energy, three-phase and unbalanced circuits, voltage drop, harmonics, fault current, and correction. Formula sheet Circuit Analysis and Protection Formula Sheet Electrical circuit formulas for Ohm's law, Kirchhoff laws, source equivalents, bridges, transients, impedance, insulation, leakage, fault current, and protection energy. Exercise set AC Power Calculations Exercises Electrical engineering exercises for AC power calculations covering RMS values, impedance, active power, reactive power, apparent power, power factor, and three-phase loads. Guide Beginner's Guide to Electric Circuits A beginner electric circuits guide covering voltage, current, resistance, power, Kirchhoff laws, nodal analysis, sources, capacitors, inductors, AC phasors, protection, grounding, measurement, and validation.