Course NumberEE-10-935
PDH Hours10
Power Transformer Protection

Power Transformer Protection

Author: Velimir Lackovic

The advancement of electrical power systems has led to a wide range of power transformers. The rating of these devices ranges from a few kVA to several hundred MVA. The protection provided by a power transformer varies with the application. In the case of a fault within the power transformer it is important to minimize tripping time in order to decrease the impact of thermal stress and electro-dynamic forces. Distribution power transformers can be protected by using fuses or overcurrent protection relays. This leads to time-delayed protection due to downstream co-ordination requirements. However, time delayed short circuit clearance is unacceptable on larger power transformers due to system operation/stability and cost of repair.

This course is suitable for engineers with a desire to understand the fundamentals of power transformer protection. It presents details related to interturn, tank and core faults. Information on over-voltages, magnetizing inrush, overheating is also included. Upon successful completion engineers will be able to address the most important power transformer protection aspects, widely adopted protection schemes and arrangements and their proper application.

Once you complete your course review, you need to take a multiple-choice quiz consisting of fifty (50) questions to earn 10 PDH credits

Learning Objectives

This course is intended to provide you with the following specific knowledge and skills:

  • Power transformer fault background
  • Power transformer differential protection
  • Power transformer restricted earth fault and overcurrent protection
  • Phase correction and filtering of zero sequence currents
  • Overfluxing and tank-earth protection
  • Buchholz protection
  • Earthing transformer protection
  • Autotransformer protection
  • Non unit and unit protection schemes
  • Power transformer condition monitoring

Download the Course to review and begin earning your PDH credits.

We provide technical courses for PDH credits that meet Board requirements for Professional Engineers, Geologists and Land Surveyors. This courses is guaranteed to be accepted in AK, AL, AR, FL, GA, IA, IL, ID, IN, KS, KY, MD, ME, MI, MN, MO, MS, MT, NC, ND, NE, NH, NJ, NM, NV, NY, OH, OK, OR, PA, SC, SD, TN, TX, UT, VA, VT, WI, WV, and WY. Before purchasing this course, please confirm that your state Board is listed above.