Course detail

Distribution Equipment

FEKT-MPC-RZBAcad. year: 2023/2024

The first part of course is dedicated to switchgears in electrical substations focusing on their schemes, design and properties, but also on branches equipment and service operations. Practical experience students gain by working on projects, in which they solve examples of switchgear busbar dimensioning or checking of overhead line conductors. The power system protections are discussed in the second part of the course. Working in laboratories where students get familiar with the selected electric protection is a practical experience. In the end the course also deals with an introduction to the high voltage technology, which is related to dielectric strength of distribution equipment.

Language of instruction


Number of ECTS credits


Mode of study

Not applicable.

Entry knowledge

For this course they are primarily required knowledge of these subjects
- Electrical power distribution - parameters of the basic elements of the power system, losses in the line, characteristic values of short-circuit currents,
- Technical Mechanics - mechanics of non-rigid bodies,
- Mathematics of 1st and 2nd year of bachelor study.

Rules for evaluation and completion of the course

The final evaluation of this subject consists of:
- assessment of the final credit test (30%),
- evaluation of laboratory protocols (20%)
- assessment of the final oral exam (50%)
The student needs at least half of the maximum number of points in each activity evaluated to successfully pass the subject.
Labs are compulsory; correctly excused absence can be replaced by arrangment with the teacher.


The aim of the course is to give students basic information about equipment for electrical energy distribution and learn them basic techniques and principles for the design of power lines. Furthermore, students should get familiar with the principles of electrical protection for the protection of power systems devices.
Graduates of this course should be able
- characterize basic types of transmission and distribution networks,
- explain the differences in the arrangement of busbar systems of switchgears,
- list the basic conditions for blocking the apparatus in switchgear branches
- apply the basic aspects of power lines dimensioning,
- explain the principles of the basic types of electrical protection,
- explain the effect of current transformers to the electrical protections.

Study aids

Not applicable.

Prerequisites and corequisites

Not applicable.

Basic literature

Orságová, J. Rozvodná zařízení. Elektronický učební text. VUT v Brně 2017. (CS)
Toman P. a kol. Provoz distribučních soustav. České vysoké učení technické v Praze Praha 2011. ISBN 978-80-01-04935-8. (CS)
Tlustý, J. a kol. Monitorování, řízení a chránění elektrizačních soustav . České vysoké učení technické v Praze Praha 2011. ISBN 978-80-01-04940-2. (CS)

Recommended reading

Not applicable.


Classification of course in study plans

  • Programme MPC-EAK Master's, 1. year of study, winter semester, compulsory-optional

Type of course unit



26 hours, optionally

Teacher / Lecturer


1. Introduction - substations as part of power system, nominal voltages, operation mode of distribution networks, basic electrical schemes and parameters of switchgears.
2. Switchgears bays facilities - features and applications. Operation manipulation in substation.
3. Technology version of HV and MV substation - outdoor and indoor substation, gas-insulated, hybrid.
4. Cables and overhead lines - materials, construction, classification codes
5. Cables and overhead lines accessories.
6. Conductors designing in respect to maximum operating temperature of cable core.
7. Conductors designing in respect to short circuits effects.
8. Mechanical design of overhead lines.
9. State equation - solution methods of state equation.
10. Electrical protection theory - Fundamentals terms and classifications.
11. Types of electrical protection for electrical devices in distribution system.
12. Overvoltage in distribution system and protections against overvoltage.
13. Electrical strength of switchgears and lines, insulation coordination.

Fundamentals seminar

24 hours, compulsory

Teacher / Lecturer


1. Installed capacity of switchgears and group of consumers.
2. Installed transformer station.
3. Dimensioning of power cables and insulatin conductors
4. Dimensioning of flat conductors for busbars.
5. Conductors protection in electric power distribution - overloading and short-circuit protection, assigning of protective elements.
6. Steel reinforced aluminium conductors sizing with respect to current and mechanical load.
7. Excursion in a high voltage switchgear.
8. Excursion in a high voltage laboratory.

Laboratory exercise

15 hours, compulsory

Teacher / Lecturer


1. Overcurrent protection testing.
2. Measuring of distance protection characteristic.
3. Measuring of differential protection.
4. Switchgears apparatus blocking by means of feeder terminal.
5. Replacement laboratory measurement.