Electrical Substation Design Course from Basic to Advanced

Discover how National Electrical Code (NFPA 70), IEEE standards, ISO standards, and local regulations shape safe, reliable, efficient substation design with quality and interconnection to the grid.

Compare single phase and polyphase systems in substation design. Single phase uses one livewire with neutral, while polyphase uses three phase voltages 120 degrees apart for balanced loads and efficiency.

Analyze how electricity is generated from diverse sources such as fossil fuels, hydro, nuclear, and renewables, then transmitted, distributed, and utilized by residential, commercial, industrial, and transportation sectors.

Improve power factor with capacitor banks, synchronous condensers, and var compensators to reduce losses and boost voltage regulation. A case study shows factor rising from 0.75 toward 0.95 via correction.

Explore arc quenching phenomena in circuit breakers, including current zero strategy, arc formation, and quenching in air, oil, vacuum, and sf6 media, with arc chutes and magnetic blowouts.

Explore the operating mechanisms of circuit breakers, including manual, motor-operated, hydraulic, pneumatic, spring, and solenoid types, and learn how their efficiency, reliability, and maintenance impact substation design.

Learn the purpose and scope of the component selection table for medium voltage and low voltage switchgear, criteria, type two coordination, and reference documents guiding selection and single line diagrams.

Select circuit breakers for mv switchgear by calculating full load current from three-phase power and voltage, and applying buffers to rated breaking and making current values for short-circuit ratings.

Learn how to select and design current transformers (CTs) using IEC nomenclature, considering transformation ratio, primary voltage, burden in VA, and safety/accuracy factors for metering and protection applications.

Select vt/pt per IEC guidelines, set the C factor (1.9 for non-solid earth, 1.5 for solid earth), use 100√3 or 110√3 secondary, ensure no core saturation and proper metering classes.

Explore analog ammeters and voltmeters, their moving coil or rectified moving coil principles, and direct or CT or voltmeter mounting used for current and voltage measurement in maintenance.

Understand type two coordination and type one coordination for low-voltage switchgear. Ensure motor protection and downstream equipment can be reused after faults while preserving safety.

Explore the main components of a motor feeder, a short circuit protective device, a fuse with a disconnecting link, and a starter with an overload relay to protect the motor.

Select short circuit protective devices (spcd) per IEC 60269 part one, understanding full range versus partial range breaking capacity. Relate to NEC 30-52 and motor protection.

Select contactors and overload relays IEC and NEC guidelines, using utilization categories (AC-1, AC-2, AC-3, AC-4) and NEMA sizes on motor rating and voltage, and size overload by starting time.

Explore type 2 coordination with sdf and mpcb using time-current curves for motor starting and full-load currents, identify crossover point, and ensure the contactor braking capacity exceeds it for protection.

Analyze a type 2 coordination case study for a 50 hp squirrel cage induction motor, covering starting current, contactor selection, overload relay settings, and fuse coordination to protect the drive.

Examine codes and standards for coordination, including the IEEE 141 red book, NDC 2005 handbook, and NEMA x 2.4, plus vendor catalogs and past project data.

Explore high voltage switchgear design and control gear, comparing IEC and IEEE ANSI standards, ratings from 3.6 to 36 kV, 60 Hz operation, and metal clad versus metal enclosed constructions.

Explains HV switchgear compartment design, interlocks and accessibility types, enclosure protection levels, current ratings, lightning arresters, arc classification, and partition types per IEC, NEMA, IEEE standards.

Learn switchyard fundamentals, including indoor and outdoor switchyards, key equipment such as busbars, transformers, circuit breakers, isolators, and earth switches, plus main and backup protection for 132 kV design.

Understand 66 kv gas insulated switchgear (gis) with sf6 insulation in a metal enclosed design, including busbars, circuit breakers, disconnectors, and transformers.

Explore the single line diagram and general arrangement drawing for a GIS substation, detailing bay allocation, metering, protection, 66 kV to 11 kV conversion, and underground cable routing.

Learn IEEE 80 based substation earthing design, including soil resistivity and conductor sizing. Understand step and touch potentials and practical switchyard grid layouts with rods.