Honorary Professorship Medium and Low Voltage Engineering
The development in medium- and low-voltage engineering (with the permanent increasing transformer rated power) requires special solutions, for example to withstand the high short-circuit currents and arcing fault stresses. From this arise particular problems, concerning the design of grids, the rating of the electrical equipment and the conceptual design of the selective protection. To meet this particular requirements, the Chair of Power Distribution and High-Voltage Technology exclusively established the honorary professorship “Medium- and Low-voltage engineering”. The field of research includes grids and switchgears of the industrial and public power supply. The students should be enabled to design grids and switchgears for high supply reliability, coevally taking into consideration the minimisation of costs.
Main topics are:
1. Rating concepts
- Grid configuration and reliability of supply
- Protection concept
- Basic principles of design and rating
2. Calculations
- Stress parameters (maximum short-circuit currents, arcing fault stresses)
- Minimum short-circuit currents (arcing short-circuit currents)
- Software for net computation
3. Selective protection in low-voltage switchgears
- Selection of circuit breakers and protective relays
- Determination of the actuator settings
- Proof of selectivity
4. Selection of cables
- Optimisation with additional reference to
- Load characteristics
- Types of switching devices
- Selectivity demands
5. Design of switchgears
- Rating of electrical equipment
- Types and construction
- Operator protection and switchgear protection
6. Short-circuit limitation devices
- Effects on rating of switchgears and electrical equipment as well as selective protection, grid configuration and operation
- Effects on the design of new switchgear types
- New protection concepts and control concepts
