G406 – Generator Electrical Testing

G406 – Generator Electrical Testing


This class was created in response to increasing requests for more detail on this subject.  For each electrical test in the course topics the presentation will include:
  • Purpose of the Test, that is, what do we want to accomplish.
  • Safety Considerations
  • Test Device Used
  • Setup
  • Data Collection
  • Data Evaluation
  • Troubleshooting Considerations
Topics include: Generator Theory (Review) • Generator Construction (Review) • STATOR Testing:  RTD, DLRO, Insulation Resistance, Dielectric  Absorption, DC Current Leakage Test, Dissipation Factor Test, Radio Noise Test, High Potential Testing, Ring Test, Bump Test, EL CID, Capacitance Mapping, Partial Discharge •  FIELD Testing: Winding Resistance, Insulation Resistance, Polarization Index, Recurrent Surge Oscillator, AC Impedance, High Potential Testing


Upon completion of this course, participants will be able to:
  1. List all those electrical tests commonly performed on large AC generator stators.
  2. List all those electrical tests commonly performed on a large AC generator field.
  3. 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?
  4. For each electrical test listed, describe safety considerations associated with that test and what should be planned to ensure safety.
  5. For each electrical test listed, describe proper setup of equipment.
  6. For each electrical test listed, describe data collection procedures that will result in meaningful data.
  7. For each electrical test listed, demonstrate the ability to interpret test data (as that data might apply to more common issues).
  8. For each electrical test listed, demonstrate the ability to troubleshoot routine problems.

Course Outline

Day One

  • Generator Theory (Review)
  • Generator Construction (Review): Stator Frame, Core, Windings, End Shield, Rotor Body, Field Windings, Retaining Rings, Collector Rings, Diesel and Hydroelectric Differences
  • Review of Tests Typically Performed: Purpose and Overview

Day Two

  • Stator:  Winding Resistance, Insulation Resistance, Dielectric Absorption, Direct Current Leakage, Dissipation Factor Test, Radio Noise (Corona), High Potential Test, Ring Test, EL-CID

Day Three

  • Rotor: Resistance Test, PI, Impedance Testing, Flux Pattern Test, Pole Drop, High Potential Testing
  • Certification Examination for those who request it

What you will receive

  1. 1 copy of HPC Technical Services' textbook, Generator Electrical Testing, a $195 value, as written by Harold Parker, with technical support by Joe Romeo, John Mitchell and 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 21 PDH

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 and pay for only 2! 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.

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.  Please note, however, you need to have lab facilities.  Our equipment can be transported or labs can be set up with available equipment on-site.
  • 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?   $195 + 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.

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.