G305 – Generator Maintenance & Testing

G305 – Generator Maintenance & Testing

2 days - 14 PDH Credits Awarded



There are NO SMALL PROBLEMS when it comes to your GENERATOR!!  Be prepared for your next outage.  Make sure you fully understand Safety, Testing, Inspection/Repair as well as disassembly/reassembly.  Don't be surprised.  Be prepared.  Register for this course today.  This course is designed for plant engineers who have a specific need to better understand generator equipment.  Plant electrical and mechanical maintenance technician’s benefit as well.
  • Corona discharge, what does that mean?
  • How do you repair fused stator punchings?
  • What components should be high potential tested?
  • How can we avoid accidental injury when testing the generator?
  • What are the probable causes of grounded fields?
  • ...And the list of answered questions goes on!!


Upon completion of this course, participants will be able to:
  1. Describe the major activities associated with generator maintenance.
  2. Describe proper generator disassembly and reassembly sequences.
  3. Describe the procedures for cleaning generator components.
  4. Describe the procedures for inspection of generator components.
  5. Given any generator component, describe the types of damage that might be found, and what are probable causes of that damage.
  6. Describe the various repair methods for defective component condition.
  7. List all those electrical tests commonly performed on large AC generators.
  8. For each electrical test listed, describe the purpose of conducting that test; i.e., what are we looking for as a result of the test?
  9. Describe the procedures for the various generator tests.
  10. List and describe safety precautions for the conducting of these electrical tests.

Course Dates / Location / Fee

See www.TurbineGeneratorTraining.com for detail on the course dates / locations / and registration fees. HPC’s 3-4-2 policy applies:  Sign up 3 for the same course/date, pay in advance, and pay for only 2 (the 3rd participant is free)! HPC Technical Services reserves the right to cancel any course/seminar within 10-working days of the scheduled date.  Fees are 100% refunded or credited to another Seminar (clients' choice) if HPC should cancel any Seminar.  HPC is not responsible for non-refundable airline tickets or other travel expenses under any circumstance.


All HPC instructors are educated ‘experts’ on the subjects they teach, with years of relevant hands-on experience (typically 20+ years), and have proven instructional skills. Brief resumes can be looked up on HPC’s website, www.TurbineGeneratorTraining.com.

Registration / Scheduling Note

This course is that last 2 days of HPC Technical Services' course called Utility Generator Technologies, G401.  For information on what is included in the first three days, please consult our website on this course.  We recommend attendance in G401, but recognize there is for some their interests lie in maintenance ONLY, so we offer this option.

Course Outline


  • Generator Components
  • Outage Planning & Scheduling:  Why Maintenance, Preparation, Tooling, Documentation, Pre-Shutdown Maintenance, Decision Making
  • Generator Stator Maintenance Activities:  Why Generators Fail, Special Tools, Spare Parts, Safety Precautions, Disassembly/Reassembly Procedure, Cleaning and Checklists.  Stator Visual Inspection to include; Loose Slot Wedges, Discoloration, Loose Punchings, Bar Vibration, Girth Cracks, Corona, Loose/Broken Ties, Liquid Connections, Air Baffles, Oil Deflectors, and Hydrogen Seals.
  • Generator Rotor Maintenance Activities:Rotor Visual Inspection to include Collector Rings, Rotor Journal Surface, Terminal Studs, Hydrogen Seal areas, Axial Flow Fans, End Turns, Field Slot Wedges, Retaining Rings.


  • Generator Electrical Tests: Safety Considerations, STATOR:  Winding Resistance, Insulation Resistance, Dielectric Absorption, Direct Current Leakage, Dissipation Factor Test, Radio Noise (Corona), High Potential Test, Ring Test, EL-CID and for the ROTOR: Resistance Test, PI, Impedance Testing, Flux Pattern Test, Pole Drop, High Potential Testing, Air Gap Flux Probe Testing.
  • Certification Examination (for those interested).

Frequently Asked Questions

  • Will HPC Technical Services bring this course to our location for our personnel only? YES, call or email Stephen Parker, Stephen@TurbineGeneratorTraining.com for a price quotation.
  • Will HPC Technical Services customize the presentation at our site to suit our particular needs?
  • Is HPC Technical Services' textbook available for purchase as a reference document? Yes our Generator Technologies text, that includes generator maintenance, is available at  $219 + S&H.
  • What is the cost for HPC Technical Service to deliver this course at our location? Well, of course that can vary, but generally speaking, if you're planning on having 6+ attend, when considering your T&L, it is to your advantage to perform the course at your plant (office).  You gain from the customization and price.
  • Can HPC Technical Services provide "Technical Assistance" in the planning and implementation of our outages? Yes we can.  Call or contact Stephen Parker, Stephen@TurbineGeneratorTraining.com for our rate sheets and any further information required.

What you will receive

  1. 1 copy of HPC Technical Services' textbook, Generator Maintenance, a $219 value, as written by Harold Parker, with technical support by via HPC's Advanced Generator Maintenance Seminar personnel, primarily AGT Services. This text contains a significant number of equipment photographs, graphics and data tables.  It is a valuable desktop reference in addition to being able to enhance the learning process.
  2. A Certificate of Completion with 14 PDH
Generator Maintenance Certification There are three levels of certification (All levels require this course):
  1. Engineer
  2. Mechanical Maintenance Technician
  3. Electrical Maintenance Technician
Those who attend this course are automatically qualified to take HPC Technical Services' Certification Examination.  This examination is offered at no additional expense to the participant.  An 80% passing grade is required.  The examination length will not exceed 2-hours.  Those who complete this examination will receive a revised "certificate of completion" that recognizes this accomplishment along with two-copies of a "To Whom It May  concern" letter that states their accomplishment.  (Two copies are provided, one for the participants' employer and one for the participants' personal file.)   Consult HPC's website, www.TurbineGeneratorTraining.com, for detail on this certification program.