Course Accreditation Number ICMEESA201/16
Course Overview
This 3-Day Course will focus on design of transmission and distribution protection schemes utilizing advanced and highly reliable technology. This will include fundamentals on protection, relay design and protection schemes for transmission lines, transformers and bus. Additionally the course will focus on settings of feeder and transformer protection schemes, and selection of current and voltage instrument transformers for those protection schemes.
Issues surrounding power quality and their effect on power systems will also be addressed. This will include measurement and modelling techniques to identify power quality problems and mitigating techniques. Impact of electrical overstress on the design and operation of power systems and electronic equipment will be discussed and protection systems will be modeled to eliminate equipment malfunction and damage due to electrical overstress.
Why You Should Attend This Course
- To significantly improve your site’s transmission and distribution reliability while avoiding endangering the lives of workers and the general public, as well as preserving company assets
- Recognize different fault types in electrical power system networks
- Perform more informed decisions on fault and design calculations
- Understand protection system components and Perform simple relay settings
- Choose appropriate protective devices for different equipment
- Interpret the protection systems in your plant, detect any shortcomings and be able to explain any undesired or uncoordinated relay operation
CPD Points
All delegates will EARN 3 CPD POINTS for attending this Course. The Credits can be claimed from ECSA upon completion of the Course.
Day 1
Need for protection
- Selectivity, stability, sensitivity, speed, reliability, dependability, security
Fault types and their effects
- Active, incipient, passive, transient, asymmetrical
- Phase & earth faults
Simple calculation of short circuit currents
- Revision of simple formulae
- Calculation of short circuit MVA & fault currents
- Worked examples
System Earthing
- Solid, impedance, touch potentials
- Effect of electric shock
- Earth leakage protection
Lightning and Lightning Protection
- Physics of Lightning
- Electrical Surges due to Lightning
- Lightning Waveforms
- Lightning Protection Systems (Evaluation and Selection)
- Lightning Protection of Electricity Supply Systems
- Lightning Protection for Buildings
Instrument Transformers
- Current transformers: construction, performance, specification, magnetization, curves
- Voltage transformers: types, accuracy, connections
Day 2
Circuit Breakers
- Purpose & duty, clearance times, types
Tripping Batteries
- Battery types, chargers, maintenance, D.C. circuitry
Relays
- Inverse definite minimum time (IDMT) relay
- Construction principles and setting
- Calculation of settings – practical examples
- New Era – modern numerical relays & future trends
Practical demonstrations and sessions
- Including simple fault calculations and relay
Co-ordination by time grading
- Problems in applying IDMT relays
Low Voltage Networks
- Air & molded circuit breakers
- Construction and installation
- Protection tripping characteristics
- Selective co-ordination (current limiting, earth leakage protection, cascading)
Principles of unit protection
- Differential protection – basic principles
Day 3
Feeder Protection
- Cables
- Pilot Wire Differential
- Overhead Lines
- Distance Protection (basic principles, characteristics, various schemes)
Transformer Protection
- Phase Shift, Magnetising in-rush, inter-turn, core & tank faults
- Differential & Restricted Earth Fault Schemes
- Bucholz Relay, Oil & Winding Temperature
- Oil – Testing & Gas Analysis
Switchgear (Busbar) Protection
- Requirements, Zones, Types
- Frame Leakage
- Reverse Blocking
- High, Medium & Low Impedance Schemes
Motor Protection
- Thermal overload, time constraints, early relays, starting & stalling conditions
- Unbalanced supply voltages, negative sequence currents, de-rating factors
- Phase faults protection
- Earth Faults – core balance, residual stabilizing resistors
Generator Protection
- Stator & rotor faults
- Overload & over-voltage
- Reverse power, unbalanced loading
- Loss of excitation and synchronism
- Typical protection scheme for industrial Generators
Overhead Line Protection
- Basic principles of the distance relay
- Tripping characteristics
- Application onto power lines
- Effect of load current & arc resistance
- Various schemes using power line carrier
Management of Protection
Routine & annual testing, investigation and performance assessment, upgrading
Who should attend?
- Electrical Engineers
- Project Engineers
- Electrical Technicians
- Field Technicians
- Electricians
- Operations Managers
- Maintenance Supervisors
- Plant Engineers
- Plant Operators
- Instrumentation Engineers
- Design Engineers
- Workplace Safety Professionals
