LV and HV Circuit Breakers

Upcoming Sessions

Classroom sessions
Online sessions

Course Introduction

Circuit breakers are essential devices in every electrical installation, providing reliable protection for both equipment and personnel. This LV and HV Circuit Breakers training course offers a detailed overview of the fundamental principles of both low voltage and high voltage circuit breakers. The course focuses on the construction, operation, arc quenching methods, maintenance, and testing of different circuit breaker types. Participants will gain a clear understanding of how circuit breakers work and why they are vital for electrical safety and system stability.

The training also explains how circuit breakers are categorized based on their arc extinction techniques. The course covers a wide range of circuit breaker types including oil, air, gas, and vacuum circuit breakers. It further explores key aspects such as substation layouts, performance characteristics, and the role of protective devices in power systems. With a strong emphasis on practical knowledge, participants will learn how to assess circuit breaker performance and troubleshoot common issues.

To ensure reliable operation, the course introduces condition-based maintenance strategies aligned with IEC standards. Participants will learn how to implement maintenance routines that enhance breaker lifespan and minimize downtime. The course also highlights testing and inspection procedures to ensure circuit breakers function effectively under fault conditions.

Course Highlights:

  • Understanding different types of circuit breakers
  • Operating principles of circuit breaker components
  • Methods of arc quenching in circuit breakers
  • Testing and evaluation of circuit breakers
  • Maintenance practices for circuit breakers

Objectives

By the end of this training course, participants will be able to:

  • Understand the role and importance of circuit breakers in electrical systems.
  • Identify the key components and operating principles of LV and HV circuit breakers.
  • Explain the different types of circuit breakers, including air, oil, gas (SF6), and vacuum breakers.
  • Describe the methods of arc extinction and how they affect circuit breaker performance.
  • Recognize various maintenance and testing procedures for circuit breakers.
  • Apply condition-based maintenance strategies aligned with IEC standards.
  • Learn care and monitoring practices specific to SF6 circuit breakers.
  • Understand the significance of efficient circuit breaker operation for reliable power system protection.

Training Methodology

This LV and HV Circuit Breakers training course uses a balanced mix of theoretical learning and practical insights. The training begins with core concepts of electrical protection and fault currents, helping participants understand the fundamental role of circuit breakers in power systems. Each section is delivered through clear explanations and real-world examples to ensure comprehension of complex concepts such as arc extinction and breaker performance characteristics.

The course also includes detailed discussions on different circuit breaker types including vacuum and SF6 gas breakers. Participants will learn about construction features, insulation principles, and specific maintenance requirements. The training emphasizes practical knowledge for field technicians and engineers, ensuring they can apply learning directly in their workplaces.

Interactive learning methods such as case studies and Q&A sessions are included to encourage engagement and reinforce understanding. Participants will explore testing procedures, routine inspections, and remote monitoring techniques to ensure reliable breaker operation. The training also highlights IEC-aligned maintenance strategies, helping participants develop a proactive approach to circuit breaker management.

Who Should Attend?

This LV and HV Circuit Breakers training course is designed for technical professionals involved in electrical systems, power generation, and maintenance activities. It is ideal for individuals who work with electrical protection systems and need practical knowledge of circuit breaker operation, testing, and maintenance. The course is especially valuable for those responsible for ensuring the safe and reliable operation of power systems.

It is highly recommended for operations and maintenance engineers, supervisors, and technicians who manage circuit breaker assets. Electrical support engineers and maintenance staff will benefit from learning inspection procedures and condition-based maintenance strategies. Power station technicians and electrical superintendents will gain essential skills for handling LV and HV breakers and improving system reliability.

Suitable for:

  • Operations & maintenance engineers, supervisors & technicians
  • Maintenance technicians
  • Electrical Support Engineers – Maintenance Operations
  • Electrical Superintendent – Power Station
  • Power Station Technicians

Course Outline

Day 1: Importance of Electrical Protection and Faults

  • Distinction between load and fault current
  • Sources of short-circuit current
  • Introduction to fault calculations
  • Balanced and unbalanced faults
  • Measurement - voltage and current transformers
  • Types of protection systems
  • The role and importance of the circuit breaker in power systems

Day 2: General Principles of Arc Extinction

  • Air-Break
  • Vacuum
  • Gas
  • Substation layouts
  • Principles of arc extinction
  • General construction principles
  • Performance characteristics
  • Arc chute functions

Day 3: Vacuum

  • History – The early years
  • The vacuum arc – An overview
  • Current interruption in vacuum
  • Methods of keeping the arc diffuse
  • Current chopping – general implications
  • Vacuum interrupters in series
  • Design of vacuum switchgear
  • Maintenance and testing requirements

Day 4: SF6 Gas

  • Properties of SF6
  • Principles of arc extinction
  • Features of construction
  • Insulation principles
  • Gas leak problems
  • Specific supervision requirements
  • Circuit power factor considerations
  • Maintenance and testing requirements

Day 5: Testing and Maintenance

  • Circuit breaker failure and the effects on power system operation
  • Testing instruments for circuit breakers
  • Circuit breaker inspection and routine tests
  • Maintenance strategies
  • Importance of circuit breaker maintenance
  • Remote monitoring of circuit breakers
  • Case studies
  • Wrap up session with Q&A

Providers and Associations

Anderson
Aztech Training
Coventry

Certificate

  • COPEX Certificate of Attendance will be provided to delegates who attend and complete the course

Material published by Copex shown here is copyrighted. All rights reserved. Any unauthorized copying, distribution, use, dissemination, downloading, storing (in any medium), transmission, reproduction or reliance in whole or any part of this course outline is prohibited and will constitute an infringement of copyright.

Whats Makes Copex Courses Unique?

COPEX Training is your gateway to professional growth, with over 20 years of experience turning potential into success. Each year, we deliver over 1,000 courses in 50+ countries, earning a stellar 98% satisfaction rate. Trusted by global giants like BP, the United Nations, and HSBC, we partner with top certification bodies to provide career-focused training that empowers individuals and drives organizational breakthroughs. Our mission? To transform the way professionals learn and grow in today’s fast-changing industries. Through expert insights, cutting-edge methods, and hands-on approaches, we equip you with the skills and confidence to tackle challenges, seize opportunities, and thrive in your career.

Led by a passionate leadership team and supported by a network of world-class trainers, COPEX Training connects professionals worldwide with life-changing opportunities. We are committed to excellence, ensuring every participant leaves with the tools, expertise, and confidence to conquer an ever-evolving world.

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Frequently Asked Questions

This FAQ section provides quick answers to the most common questions about our services, procedures, and policies. We aim to make your experience with us as straightforward as possible. For further assistance, our support team is ready to help.

Yes, and we'd love to make that happen. COPEX  specialises in fully customised in-house training, adapting course content to align with your organisation's unique goals, culture, and industry demands. Get in touch with us directly and we'll craft the right solution for your team.

Yes, the choice is yours. The LV and HV Circuit Breakers Training Course  runs in a traditional classroom setting across various international locations, and it's also available as a live online programme for those who prefer to learn from wherever they are. Pick the format that fits your lifestyle and schedule best.

Not at all. The LV and HV Circuit Breakers Training Course doors are open to everyone, regardless of your background or how many years you've been in the industry. That said, having some familiarity with the subject area can help you get even more out of the experience.

Our team is available around the clock — 24 hours a day, 7 days a week — ready to answer any question you have. Whether you need help choosing the right course, completing your registration, or sorting out logistics, we're here for you.

Expect an engaging, hands-on journey — not a room full of slides and passive listening. COPEX’s delivery blends presentations with group discussions, real-world case studies, practical exercises, and collaborative workshops. The goal is simple: everything you learn, you can use immediately back at work.

You'll be in good hands. COPEX hosts its courses in premium 4-star and 5-star hotels, with professional, fully equipped training spaces designed for focus and comfort. Throughout each day, you'll enjoy refreshment breaks with coffee and snacks, plus a complimentary lunch following every session.

This LV and HV Circuit Breakers Training Course welcomes professionals from all walks of corporate life — whether you're a seasoned manager, an emerging team leader, a subject-matter specialist, or simply someone driven to grow in their field. If you're serious about advancing your career and deepening your expertise, this course was built with you in mind.

Absolutely. Every participant who successfully completes the LV and HV Circuit Breakers Training Course earns an COPEX Certificate of Completion — a recognised mark of professional achievement. Depending on the specific course, it may also qualify for Training credits, which will be clearly noted in the course details.

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