OMICRON CPC 100 Primary Testing Course



After completion of this course each learner will have a good understanding of power transformers, current transformers and voltage transformers. The learner will know how to perform test procedures and to run and update pre-prepared test templates on power transformers, current transformers and voltage transformers with the OMICRON primary test equipment hardware and associated software.

Theoretical session

The participants will be familiarised with the important aspects of different types of tests performed on various types of transformers. Participants will also be educated on the different IEC standards governing tests on transformers.

Practical session

The participants will have to apply the gained knowledge. During practical sessions a power transformer and current transformer will be tested. A number of different tasks will have to be performed on each transformer.


  • Basics: Important aspects of primary plant testing in an electrical substation. Safety aspects. CPC 100 and CP TD1 hardware overview. 
  • Basic theory on power transformers, current transformers and voltage transformers. Different types of tests performed on the different transformers, international standards regulating current transformers and testing on power transformers. 
  • CPC 100: Setting up and execution of different tests on power transformers and instrument transformers. 
  • CPC 100 Quick Mode: Injecting voltage and current into a test object. Ratio tests 
  • Current Transformer Testing: Ratio, burden, excitation curve, winding resistance, polarity check and ratio by using the voltage method. Tan delta testing. 
  • Voltage Transformer Testing: Ratio, burden, polarity check and tests on non- conventional VTs. 
  • Power Transformer Testing: Transformer ratio and vector group test, winding resistance test, on load tap changer test. Tan delta and transformer windings test. 
  • CPC Explorer and CPC Editor Software: Communication between the CPC 100 and PC. Upload and download of test results and test templates. 
  • CPC Excel File Loader: Create customized reports and perform specific post- processing of test results.

Pre-requisites for the seminar

  • Basic knowledge and understanding of primary plant (CTs, VTs and power transformers). 
  • Working knowledge of how to operate WindowsTM programs (e.g. WordTM, ExcelTM) and the WindowsTM operating system.

Software used

PTM V4.30 or later