Services, Distribution and Three-Phase Systems

Three-phase systems, large services and load calculations, switchboards and switchgear, overcurrent devices and trip units, short-circuit calculations, selective coordination and arc flash, distribution transformers, grounding and bonding, ground-fault protection and high-resistance grounding, feeders and power quality, medium-voltage systems, and testing, commissioning and maintenance.

ELEC-320 12 lessons · 4 h 57 min

Offered by HSM University · Electrician

This is the American version of this course. See the Canadian version.

What you'll learn

Describe three-phase wye and delta systems used for services and distribution, and calculate voltages, currents and power in them
Perform load calculations for large services and select service equipment, conductors and arrangements
Compare switchboards, switchgear, panelboards and motor control centers and select them by rating and application
Explain and apply fuses, molded-case and power circuit breakers, and LSIG electronic trip units
Calculate available short-circuit current with the point-to-point method and verify equipment interrupting and withstand ratings
Interpret time-current curves, achieve selective coordination, and explain arc flash studies, labels and mitigation
Select, connect, protect, ground and test distribution transformers, including taps, inrush and harmonic loads
Design grounding electrode systems and size grounding electrode conductors, bonding jumpers and equipment bonding conductors
Apply ground-fault protection of equipment and compare solidly grounded, ungrounded and high-resistance grounded systems
Size feeders and parallel conductors, calculate voltage drop, address harmonics and correct power factor
Describe medium-voltage distribution, shielded cables, terminations, cable testing, protective relays and safe work practices
Plan acceptance testing, energization, commissioning and maintenance of distribution systems

Course content

12 lessons · 4 h 57 min total · final exam

1 Three-phase systems for services and distribution 26 min · quiz
2 Large services and load calculations 25 min · quiz
3 Switchboards, switchgear, panelboards and motor control centers 24 min · quiz
4 Overcurrent protective devices: fuses, breakers and trip units 24 min · quiz
5 Short-circuit current calculations 24 min · quiz
6 Selective coordination and arc flash hazard 25 min · quiz
7 Transformers in distribution systems 24 min · quiz
8 Grounding and bonding for large services 25 min · quiz
9 Ground-fault protection and system grounding methods 25 min · quiz
10 Feeders, busway and power quality in distribution 26 min · quiz
11 Medium-voltage systems for large facilities 23 min · quiz
12 Testing, commissioning and maintenance of distribution systems 26 min · quiz
E Final exam 20 questions

Requirements

Recommended background. You can start any course at any time.