Maintenance and Testing of Electrical Machines

Maintenance and testing of electrical machines are critical for ensuring their efficient operation and longevity. Regular inspections, lubrication, and cleaning help prevent breakdowns. Periodic testing involves checks for insulation resistance, winding resistance, and insulation condition to detect any faults early. Load testing assesses performance under operating conditions. Thermal imaging aids in identifying hotspots. Maintenance schedules should be adhered to for optimal machine health and safety.

Syllabus

Weeks Video Title 1 Introduction to transformers Phasor diagram for transformers Equivalent circuit and testing 2 Efficiency and voltage regulation Three phase transformers and applications Auto transformers 3 Instrument Transformers I Instrument Transformers II DC machine and its features 4 EMF and torque equation Motor and generator modes Starting characteristics of DC machine 5 Speed control of DC machines Applications of DC machines I Applications of DC machines II 6 Principles of AC machines Construction and equivalent circuit Speed control of Induction motors 7 Working principles of alternators Working principle of synchronous motors Application of AC machines I 8 Application of AC machines II Installation of electrical utilities Commissioning of electrical utilities 9 Concept of earthing and grounding Earth resistance for different installations Instruments in insulation testing Measurement and testing of insulation oil 10 Concept of preventive maintenance Maintenance of transmission line and cables Preventive measures to control environmental pollution Trouble shooting of equipment 11 Electrical accidents and safety measures Testing of relays Testing of circuit breakers Hot line maintenance 12 Protection of transformers Protection of transmission lines Protection of rotating machines Revision and summary