Stationary Engineering Course - 3rd Class Ontario Syllabus


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9. ELECTROTECHNOLOGY:

a. Direct Current Theory:

I. Electron theory; theory of magnetism; magnetic field; force on conductor.

II. Electromagnetic Induction: induced EMF; Faraday’s and Lenz’s Laws of Induction; Fleming’s right-hand rule; self-induction in a coil; mutual induction.

b. Direct Current Machines:

I. Generators: operating principles, construction, commutation, speed and voltage control; types (shunt, series and compound).

II. Motors: principle of operation, torque development and measurement, armature reaction, interpoles, speed control, methods of starting, types (shunt, series and compound), protection devices.

c. Alternating Current Theory:

I. Generation of an alternating EMF; sinusoidal waveforms; phase relationships.

II. Resistance in AC circuits; inductive and capacitive reactance; impedance; power and power factor; single and multi-phase circuits.

d. Alternating Current Machines:

I. Alternators: principle of operation, construction, voltage regulation, excitation methods, parallel operation, synchronizing procedures; automatic synchronizers, taking off the line, switchboard components (meters, breakers, machine protection relays).

II. Motors: principle of operation of induction and synchronous motors; construction; speed and slip; starting methods for induction motors; speed control; variable speed starting, step-starting.

III. Transformers: operating theory; types (design and construction), losses and efficiency; methods of cooling; safety and fire protection.

e. AC Systems, Switchgear, Safety:

I. Components, layout, and operation of a typical industrial AC power system.

II. Components of an AC generator panel.

III. Circuit protective and switching equipment: fuses, safety switches; circuit breakers; circuit protection relays; automatic bus switchover (emergency supply to normal supply); grounding; lightning arresters.

IV. UPS/Inverter Systems: purpose, components, operation; battery design and maintenance.

V. Electrical safety for operators.

10. ELECTRICAL CALCUALTIONS:

Explain theories and perform calculations for:

a. Current, voltage, resistance in series and parallel circuits; using Ohm’s Law and Kirchhoff’s Laws; Wheatstone Bridge.

b. Temperature coefficient of resistance.

c. Work, energy, power: relationship between electrical, mechanical and heat units.

d. Sinusoidal Wave Forms: maximum, average and root mean square root values; frequency; phase.

e. AC Circuits: inductive reactance, capacitive reactance, impedance, KVA; power factor.

f. Relationship between poles, frequency, speed for AC machines. Transformer calculations; step up and step down.

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