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Electrical Operation & Protection
Objectives

 

This course will provide you with excellent knowledge of the principles of protection. You will also gain a better understanding of the possible problems that are likely to arise and know where to look for answers.

Participants attending the program will:

  • Learn the fundamentals of electrical power protection and its applications
  • Understand different fault types
  • Perform simple fault and design calculations
  • Know case studies of protection system components
  • Learn relay settings
  • Increase job satisfaction through informed decision making
  • Improve the safety of your site with the knowledge gained

Outlines

DAY 1:

NEED FOR PROTECTION

  • Selectivity, stability, sensitivity, speed, reliability, dependability and security

 

FAULT TYPES AND THEIR EFFECTS

  • Active, incipient, passive, transient and asymmetrical
  • Phase and earth faults

 

SIMPLE CALCULATION OF SHORT CIRCUIT CURRENTS

  • Revision of simple formulae
  • Calculation of short circuit MVA and fault currents
  • Worked examples

 

DAY 2:

 

SYSTEM EARTHING

  • Solid, impedance and touch potentials
  • Effect of electric shock
  • Earth leakage protection

 

PROTECTION SYSTEM COMPONENTS INCLUDING FUSES

  • History, construction and characteristics
  • Energy let through and applications

 

INSTRUMENT TRANSFORMERS

  • Current transformers: construction, performance, specification and
  • magnetization curves
  • Voltage transformers: types, accuracy and connections

 

CIRCUIT BREAKERS

  • Purpose and duty, clearance times and types

 

DAY 3:

 

TRIPPING BATTERIES

  • Battery types, chargers, maintenance and DC circuitry

 

RELAYS

  • Inverse Definite Minimum Time (IDMT) relay
  • Construction principles and setting
  • Calculation of settings – practical examples
  • New modern numerical relays and future trends

 

CO-ORDINATION BY TIME GRADING

  • Problems in applying IDMT relays

 

 

FEEDER PROTECTION

  • Cables
  • Pilot wire differential
  • Overhead lines
  • Distance protection (basic principles, characteristics and various schemes)

 

DAY 4:

 

TRANSFORMER PROTECTION

  • Phase shift, magnetizing in-rush, inter-turn, core and tank faults
  • Differential and restricted earth fault schemes
  • Bucholz relay, oil and winding temperature
  • Oil - testing and gas analysis

 

SWITCHGEAR (BUSBAR) PROTECTION

  • Requirements, zones and types
  • Frame leakage
  • Reverse blocking
  • High, medium and low impedance schemes

 

 

DAY 5:

GENERATOR PROTECTION

  • Stator and rotor faults
  • Overload and 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 and arc resistance
  • Various schemes using power line carrier

 

MANAGEMENT OF PROTECTION

  • Routine and annual testing, investigation and performance assessment and upgrading

 

SUMMARY, OPEN DISCUSSION AND CLOSING

 

 

Who Should Attend

 

  • Electrical Engineers
  • Project Engineers
  • Design Engineers
  • Instrumentation and Design Engineers
  • Electrical Technicians
  • Field Technicians
  • Electricians
  • Plant Operators

Duration

5 Days

Start Date End Date Country City

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