About Our Circuit Breakers & Switchgears (LV/MV/HV) Course

Time Training Center’s 5-day, 30-hour Circuit Breakers & Switchgears (LV/MV/HV) : Design, Testing, Commissioning, Maintenance, Repair & Troubleshooting Course equips you with in-depth knowledge of the critical aspects of circuit breakers and switchgears used in low, medium, and high voltage systems, covering their design, operation, testing, and maintenance.

The course provides participants with a thorough understanding of overcurrent protection devices, including the characteristics and functions of various types of circuit breakers. Emphasis is placed on interpreting time-current curves and selecting appropriate protection relays, especially for medium and high voltage applications. 

The role of power transformers in electrical transmission and distribution systems is also explored, with detailed insights into components, the importance of routine testing, and the use of intelligent diagnostic tools for evaluating transformer health. Special attention is given to the operation of protection relays designed for transformers and their integration into electrical protection schemes. The program also addresses eco-friendly alternatives for both circuit breakers and transformers, aligning with the industry’s shift towards sustainability and efficiency in power systems.

Circuit Breakers & Switchgears (LV/MV/HV) Course Objectives

Upon successful completion of this Circuit Breakers & Switchgears (LV/MV/HV) Course , participants will be able to:

• Understand the various types and characteristics of circuit breakers, including their operational functions and protective roles in electrical systems
• Explain and interpret time-current curves for circuit breakers, focusing on the L, S, I, and G curves
• Analyze and apply appropriate testing methods for circuit breakers and protection devices
• Differentiate between transmission and distribution power transformers, including their designs, applications, and operational principles
• Develop a structured approach to the design, selection, and operation of circuit breakers in line with time-current curves
• Select and apply appropriate protection relays for circuit breakers, ensuring safety and efficiency in power systems
• Gain hands-on experience with routine transformer tests and understand their significance in maintaining system reliability
• Explore the use of digital protection relays and their application in enhancing system protection for circuit breakers and transformers
• Understand the shift towards eco-friendly solutions in circuit breakers and transformers, including SF6 alternatives and green technology
• Operate intelligent testing, measuring, and diagnostic tools for power transformers to ensure optimal performance and early fault detection

Who Should Attend Our Circuit Breakers & Switchgears (LV/MV/HV) Course?

This course is highly beneficial for professionals involved in the planning, operation, design, maintenance, and troubleshooting of circuit breakers and switchgear systems across various voltage levels, including:

• Project Engineers/Managers working on electrical system projects
• Electrical Engineers/Technicians specializing in power distribution and protection systems
• System Operators responsible for managing electrical power systems
• Design Engineers focused on designing electrical systems and components
• Asset Engineers/Managers in charge of the maintenance and management of electrical equipment

Circuit Breakers & Switchgears (LV/MV/HV) Course Training Methodology

We employ a comprehensive and applied learning strategy, integrating theory with real-world implementation:

• 30% Conceptual Learning: Expert-led sessions on catalytic theory and engineering principles
• 20% Interactive Workshops: Group exercises, presentations, and technical discussion forums
• 30% Case-Based Learning: Industry-specific examples and troubleshooting scenarios
• 20% Technology Integration: Digital tools, simulations, and catalyst modeling applications

Note: Instructors may adjust the training approach to fit technical requirements or participant engagement levels.

Circuit Breakers & Switchgears (LV/MV/HV) Course Instructor

Our courses are delivered by highly qualified instructors with extensive experience in both industry and academia. With decades of hands-on expertise across a wide range of technical disciplines, our instructors are dedicated to providing high-quality, impactful training that equips participants with practical knowledge and skills they can immediately apply. Full instructor profiles are available upon request.

Circuit Breakers & Switchgears (LV/MV/HV) Course Fees

The course fee includes the following:

• Course Materials: Comprehensive participant materials, including lecture notes, slides, and case study documents. (Tablet or IPAD)
• Coffee/Tea: Provided on arrival and during morning and afternoon breaks to keep participants refreshed.
• Buffet Lunch: Served daily to ensure participants have an opportunity to network and recharge during lunch breaks.

Circuit Breakers & Switchgears (LV/MV/HV) Course Outline

Module 1: Importance and Merits of Overcurrent Protection Devices

• Pre-test assessment of existing knowledge
• Overview of Overcurrent Protection Devices
• Common Electrical Faults and Their Consequences
• Types and Characteristics of Fuses
• Interpretation of Fuse Operation Sequence and Waveform
• AC and DC Fuse Types and Classifications
• Fuse Charts and Their Applications

Module 2: Introduction to Low Voltage (LV) Circuit Breakers

• Construction and Ratings of Miniature Circuit Breakers (MCB)
• Operation of Molded Case Circuit Breakers (MCCB)
• Characteristics of Air Circuit Breakers (ACB)
• Introduction to Time-Current Curves
• Application and Interpretation of Long-Time, Short-Time, Instantaneous, and Ground Fault Curves
• Electronic Trip Unit Characteristics

Module 3: Medium Voltage Circuit Breakers

• Gas Insulated Vacuum Circuit Breakers
• Arc Quenching Principles in Circuit Breakers
• SF6 Gas Circuit Breaker Interrupters
• SF6 Gas Leakage Detection and Testing
• Dew Point and Purity Testing of SF6 Gas
• Merits and Operation of Vacuum Circuit Breakers
• Testing of Vacuum Circuit Breakers

Module 4: High Voltage Circuit Breakers

• Live Tank vs. Dead Tank Circuit Breakers
• Air Insulated Substation (AIS) High Voltage Circuit Breakers
• Gas Insulated Substation (GIS) Circuit Breaker Designs
• Hybrid Circuit Breakers
• High Voltage Vacuum Circuit Breakers
• Vacuum Interrupter Applications and Testing

Module 5: Instrument Transformers and Numerical Protection Relays

• Types and Ratings of Current Transformers for Protection and Metering
• Voltage Instrument Transformers and Capacitance Voltage Transformers (CVT)
• Non-Conventional Instrument Transformers (NCIT)
• Introduction to Digital Numerical Protection Relays
• Application of Protection Relays in Electrical Equipment
• Understanding IEC 61850 Communication Protocol

Module 6: Eco-Friendly Circuit Breakers and Partial Discharge

• Impact of Greenhouse Gases (GHG) on Circuit Breakers
• Replacement of SF6 Gas with Eco-Friendly Alternatives
• Types of Eco-Friendly Gases and SF6-Free Circuit Breakers
• Construction and Operation of Dry Air Circuit Breakers
• Clean Air Insulation Technology
• Partial Discharge in Circuit Breakers

Module 7: Power Transformers – Types, Construction, and Operation

• Overview of Power Transformer Designs and Components
• Operation of Buchholz Relay
• Conservator and Dehydrating Breathable Components
• Maintenance-Free Dehydrating Breathable Systems
• Cooling Systems for Power Transformers

Module 8: Transmission and Distribution Transformers

• Power Transformer Vector Groups
• Significance of Impedance Percentage
• Characteristics of On-Load Tap Changers
• Sweep Frequency Response Analysis
• Protection Methods for Power Transformers
• Digital Smart Transformers for Transmission and Distribution

Module 9: Eco-Friendly Power Transformers and Relevant Tests

• Eco-Friendly Oils for Power Transformers
• Dissolved Gas Analysis (DGA) and Interpretation
• Breakdown Voltage Testing
• Turn Ratio and Winding Resistance Testing
• Partial Discharge Testing in Power Transformers

Module 10: Intelligent Testing, Measuring, and Diagnostics for Power Transformers

• Remote Monitoring of Power Transformers
• Digital Testers for Power Transformers
• Interpretation of DGA Results Using Duval’s Triangle
• Introduction to Gas Insulated Transformers
• Case Studies and Discussion of Real-World Scenarios

Module 11: Capstone and Assessment

• Review of Core Topics and Key Learnings
• Final Group Discussion and Q&A
• Post-Test Evaluation
• Certificate Presentation

Course Completion Certificate

Upon successfully completing the Circuit Breakers & Switchgears Course at Time Training Center, participants will receive an official Course Completion Certificate. This certificate recognizes their expertise in circuit breaker and switchgear systems across LV, MV, and HV applications, including design, testing, maintenance, protection, and troubleshooting, while demonstrating their commitment to safety, reliability, and global industry standards.