Course Details
Course Outline
5 days course
Role of Protection
- Contribution in network design
- Safety requirements
- Principles
Components & Operation
- LV and MV fuses – characteristics and construction
- Time limit fuses and CT release
- Relays, basic principles, Inst, DT, IDMT, O/C & EF
Introduction to Grading
- Current and time grading
- Fuses
- IDMT
- Definite time
- Practical exercise
LV Networks Protection
- Principles
- Walkthrough the LV system
HV Networks Protection
- Principles
- Walkthrough HV network system
Basic Fault Calculation
Fuses
- Construction and operation
- HV and LV fuses
- LV fuse grading
LV ACB Electronic Relays
- Basic principles
- Settings explained
- Plotting characteristics on log-log paper
- Additional features
Role of Protection
- Contribution in network design
- Safety requirements
- Principles
Simple Fault Calculations
- Types of network faults
- Fault Level – what it is and why we need to know it
- How to calculate fault level
- Network reduction
- Calculation of balanced fault levels and fault currents
- Introduction to symmetrical components
Unbalanced Fault Calculations
- Worked examples using symmetrical components
Measuring Transformers
- Why we need measuring transformers
- Principles and specifications CTs and VT
Grading
- Grading Exercises
Electronic Relays
Protection of Radial Networks
- Principles of radial feeder protection
- Urban networks
- Overhead networks
- Distribution transformers
Busbar protection
Arc Suppression Coil Earthed System
Transformer and Transformer-Feeder Protection
- Transformer fault types and characteristics
- Protection applications to transformers and transformer feeders
- Differential protection
Protection of Non-radial Networks
- Directional overcurrent and earth fault protection
- Feeder unit protection and schemes
- Distance protection
MV/LV systems with Generators
- Operating requirements
- System and interface protection
- Generator protection
