Operation and Maintenance of Circuit Breakers and Switchgears

Start Date End Date Venue Fees (US $)
24 May 2026 Riyadh, KSA $ 3,900 Register
30 Aug 2026 Kuala Lumpur, Malaysia $ 4,500 Register
13 Dec 2026 Dubai, UAE $ 3,900 Register

Operation and Maintenance of Circuit Breakers and Switchgears

Introduction

The duty of a circuit breaker is to switch on and switch off, once or repeatedly several times different electrical circuits during normal as well as abnormal operating conditions. Circuit breakers and switchgear specification, operation, testing, and maintenance are essential for engineers and technicians. This course designed to provide the participants with technical knowledge, practical experience, and good skills in the field.

Objectives

    By the end of this course the participants will;

    • Understand the arc phenomena and circuit interruption.
    • Know the different types of circuit breakers and industrial switchgears.
    • Be able to select circuit breaker specification.
    • Know the maintenance procedures.
    • Be able to do all tests on circuit breakers.
    • Be able to detect circuit breakers troubleshooting.
    • Be able to use circuit breaker curves and make protection coordination

Training Methodology

This is an interactive course. There will be open question and answer sessions, regular group exercises and activities, videos, case studies, and presentations on best practice. Participants will have the opportunity to share with the facilitator and other participants on what works well and not so well for them, as well as work on issues from their own organizations. The online course is conducted online using MS-Teams/ClickMeeting.

Who Should Attend?

The course is designed to electrical engineers and highly qualified technicians concerned with circuit breakers and switchgears in electrical utilities, electrical distribution and transmission.

Course Outline

Day 1: General Introduction

  • Electrical engineering basic concepts
  • Three phase review and per unit
  • Voltage levels
  • One line and three line diagram
  • Generation system layout
  • Transmission system layout
  • Substation system layout
  • Distribution system layout
  • Review of short circuit current calculation.

Industrial Switchgears

  • Fuses
  • Auto-reclosers
  • Automatic sectionalize
  • Circuit Breakers
  • Isolator switches
  • Load switches
  • Relays
  • Current transformers
  • Voltage transformers

Day 2: Arc Phenomena and Circuit Interruption

  • Arc phenomena
  • Maintenance of the Arc
  • Properties of Arc
  • Arc Interruption theory
  • Circuit Breaker Rating
  • Circuit constants and circuit conditions
  • Conditions of severity
  • Restriking voltage transient
  • Duties of Switchgear

Low Voltage Circuit Breakers

  • Low voltage molded case current limiting circuit breakers
  • Low voltage molded case circuit breakers with high breaking capacity
  • Insulated case circuit breakers
  • Low voltage air circuit breakers
  • Low voltage circuit breakers specification

Day 3: Medium and High Voltage Circuit Breakers

Air Circuit Breakers

  • Method of increasing arc resistance
  • Plan break type
  • Magnetic blow out type
  • Arc splitter type
  • Application
  • Construction and operation

 Oil Circuit Breakers

  • Arc rupture under oil
  • Advantages of oil
  • Disadvantages of oil
  • Plan break oil circuit breakers
  • Arc control circuit oil breakers
  • Minimum oil circuit breakers
  • Construction and operation

SF6 Circuit Breakers

  • Basic Features of SF6 Breakers
  • Dielectric properties of SF6
  • Quenching properties of SF6Construction of SF6 breaker
  • Puffer type breakers 

Vacuum Circuit Breakers

  • The vacuum medium
  • The vacuum arc
  • Vacuum arc stability
  • Vacuum break down
  • Vacuum switch construction
  • Applications of vacuum circuit breakers

Day 4: Other Type of Circuit Breakers

  • Synchronies circuit breakers
  • Dc circuit breakers

Medium and high voltage circuit breakers specification

Circuit Breaker Maintenance and Services

  • Inspection
  • General inspection technical procedure
  • Daily inspection of circuit breakers
  • Monthly inspection of circuit breakers
  • Annual inspection of circuit breakers
  • Disassembly
  • Cleaning
  • Tightening
  • Lubrication
  • Adjustment
  •  Circuit Breakers Testing
  • Classification
  • Description of a simple testing station
  • Equipments used in testing
  • Testing procedure
  • Direct testing
  • Test report
  • Indirect testing

Day 5:

  • Circuit Breaker Troubleshooting
  • Circuit Breakers Curves and Protection Coordination

Accreditation

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