TU Graz/ Studying and Teaching/ Degree and Certificate Programmes/ Continuing Education/

Electrical Power System Protection

Electrical power and energy are not only an essential part of production in industrial and commercial processes, but are crucial for maintaining the quality of our civilization. Faults in electrical systems lead to inevitable interruptions of the power supply and must therefore be cleared quickly selectively and in the best possible way.

This task is performed by protective devices which are selected, parameterized and operated by specially trained protection engineers.

The main objective of the course is the mastery of the state-of-the-art technology for the operation and testing of protective devices and systems. After clarifying the necessary requirements for a protection system, the main topics of the university course are the fault calculation for single and multi-pole faults, and the presentation of the different protection concepts.

Contents and Focus

  • You will learn the basics of protection technology.
  • You will critically assess the development of faults and the behavior of the protective devices.
  • You will learn how to ensure security of supply.
  • You will learn the basics of network and system protection technology.

The online university course consists of 6 modules:

Module 1: System aspects

  • Systems and Security of Supply
  • Short Circuit Calculations
  • Faults and Network Availability
  • Risk Management
  • Coincidence Probability
  • Protection and Network Reliability Indicators

Module 2: Overcurrent protection

  • Protection Fault Dynamics
  • Overcurrent basics
  • Overcurrent Time Grading
  • Overcurrent ring structures
  • Current Time Grading Transformers
  • Reverse Current Interlocking Scheme
  • Overcurrent Protection Selectivity, Fault Locating
  • Overcurrent Back-up Protection

Module 3: Differential protection

  • Differential Protection Basics

Module 4: Earth fault protection

  • Earth Fault Protection and Neutral Point Treatment
  • Earth Faults - Dynamics and Stationary Characteristics
  • Earth Fault Calculations
  • Earth Fault Relaying - Wattmetric Relays
  • Earth Return Path Factor

Module 5: Distance protection

  • Distance Protection Basics
  • Distance Protection Basic Selectivity and Grading Scheme
  • Signal Comparison

Module 6: Fault behavior

  • Failure Modes and Fault Analysis
  • Transformer Vector Groups
  • Disturbances behind Different Transformer Vector Groups
  • Current Transformers
Source: gjp311 – Fotolia.com

Dates and Deadlines

Next course date: upon request

Teaching and learning concept

The university course is conducted using the technology of e-learning.

Participants are provided with short videos ("nuggets") that cover about 75% of the learning content.

Each video is accompanied by a script that summarises the content in short form. In addition, a detailed script and a questionnaire are available. Self-tests for the individual learning videos provide immediate feedback for the participants. Building on the basic knowledge, the application knowledge is taught in the form of five 2-hour webinar units.

The acquired knowledge is applied in the individual elaboration of four real-life examples. After submitting these, two 2-hour online Q&A sessions are offered, which serve as preparation for the written final examination.

Source: Sissi Furgler Fotografie GmbH
Lothar Fickert, programme director

Only specialised protection ensures the reliability of the networks, consumer systems and energy generation plants!

Programme Director

em.Univ.-Prof. Dipl.-Ing. Dr.techn.
Institute of Electrical Power Systems

Vera Poschauko, Source: sara-sera – TU Graz


TU Graz Life Long Learning
Phone: +43 316 873 4932

Target Groups and Admission Requirements

This course is designed for technicians who have graduated from a technical college (HTL), a university or a university of applied sciences, who are working in the field of electrical energy supply. The programme director uses the qualifications submitted to decide on admission.