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EE0105 Jul - 09 Jul, 2021Live Online$2150Register
EE0104 Oct - 08 Oct, 2021Live Online$2150Register
EE0103 Jan - 07 Jan, 2022Live Online$2150Register
EE0104 Apr - 06 Apr, 2022Live Online$1750Register
EE0104 Jul - 08 Jul, 2022Live Online$2150Register
EE0103 Oct - 07 Oct, 2022Live Online$2150Register

Classroom Training Schedules

EE0120 Sep - 01 Oct, 2021Amsterdam$7850Register
EE0112 Dec - 16 Dec, 2021Dubai$4750Register
EE0102 Jan - 13 Jan, 2022Dubai$6750Register
EE0113 Jun - 01 Jul, 2022Singapore$16250Register
EE0119 Sep - 30 Sep, 2022Amsterdam$7850Register
EE0111 Dec - 15 Dec, 2022Dubai$4750Register

Did you know you can also choose your own preffered dates & location? Customise Schedule

Course Overview

This Switchgear, Circuit Breakers and Power Transformers training course cover about Efficient Operations and Maintenance of it. Switchgear units are critical in the protection and supply of electrical power in the manufacturing sector and in utility distribution systems. Careless maintenance routines can lead to system inefficiencies and loss of system dependability.

There are many tools that are used in the maintenance of on low, medium and high voltage switchgear today, therefore, it is important to know the differences in what to use when. This course is intended to educate its learners with the fundamentals in operating and maintaining switchgear, circuit breakers and power transformers.

Why is the maintenance of circuit breakers important? The maintenance of circuit breakers warrants special attention because of their involvement in regular switching and the protection of other equipment. System failures and equipment damage can occur if a circuit breaker fails to operate simply because of a lack of preventive maintenance.

Overall, this Switchgear, Circuit Breakers and Power Transformers course will enable maintenance managers and technicians to be aware of the importance of effective maintenance schedules for switchgear, circuit breakers and power transformers.

This Zoe training course will empower you with the consciousness of knowing the importance of maintenance procedures for switchgear, circuit breakers and power transformers, as well as how to go about planning and carrying out the maintenance activities efficiently.

Course Objectives

Upon completing this Switchgear, Circuit Breakers and Power Transformers course successfully, participants will be able to:

  • Describe the basics of operating switchgear and circuit breakers
  • Select suitable types and ratings of circuit breakers and switchgear
  • Understand the functions of switchgear components (CTs, VTs, relays and cable terminations)
  • Describe the rules of a power transformer’s operation
  • Recognise and apply different transformer types
  • Set up straightforward transformer protection schemes
  • Specify power transformer testing procedures
  • Rationalise switchgear asset management including the CBM and RCM processes, tripping devices, maintenance and testing
  • Apply load and fault calculations to determine the objectives of protection systems and the operating environments of power systems
  • Explain circuit breaker control circuits, types and applications of protective relays, the structure of control circuits and the use and applications of current and voltage transformers
  • Administer power transformer breakdowns to reduce disruption
  • Deliberate the characteristics of a circuit breaker in relation to protection control circuits, and the selectivity, sensitivity and speed of the control circuits
  • Draw up simple operational policies for safety guidelines
  • Develop realistic maintenance strategies for switchgear and transformers

Training Methodology

This is an interactive Switchgear, Circuit Breakers and Power Transformers training program and will consist of the following training approaches:

  • Lectures
  • Seminars & Presentations
  • Group Discussions
  • Assignments
  • Case Studies & Functional Exercises

Just like all our courses, this program also follows the ‘Do-Review-Learn-Apply’ model.

Organisational Benefits

Companies who send in their employees to participate in this Switchgear, Circuit Breakers and Power Transformers course can benefit in the following ways:

  • Retain workforce: sustain employees who may be considering leaving their jobs for a full-time qualification
  • Less downtime from work: flexible training methods requiring less (or no) time away from work
  • Increase competence: develop your technical employees’ skills and knowledge
  • Lower training costs: the training will be conducted at our own site
  • Broader insight and subject-matter experts: participants will have access to professional instructors and peers to discuss work-related problems

Personal Benefits

Professionals who participate in this Switchgear, Circuit Breakers and Power Transformers course can benefit in the following ways:

  • In-depth course material: deep dive into the technical details of circuit breakers and switchgear and master the areas covered in the course
  • Case studies: gain practical knowledge that will give you an edge in your workplace
  • Professional development: completing this course successfully will give you more confidence in the maintenance of circuit breakers and switchgear, and thereby, you will invariably have a competitive advantage over your peers
  • Cost-effective: you can obtain a professional qualification at a competitive cost if you sign up for this course with Zoe
  • Interactive lessons: interactive sessions let you connect with your instructor and peers to learn from real-world examples that will build your skillset and can be applied in your respective role as well

Who Should Attend?

  • This Switchgear, Circuit Breakers and Power Transformers course is ideal for those who want to study the significant characteristics of circuit breakers and switchgear.
  • The program will especially be useful to engineers, supervisors and other technical individuals who require a thorough understanding of switchgear and circuit breaker design, setup, inspection, testing, maintenance and overhaul.
  • Members of various industries including electricity and utility, Ministry of Power, etc. and even those across geographic locations are encouraged to take advantage of this extremely beneficial and valuable course.
  • Any professional who interacts with switchgear, circuit breakers or power transformers in any manner will benefit from this course.

Course Outline


  • Fundamentals of circuit breakers
  • Types of breakers
  • Single line diagrams
  • Active and passive network modules
  • Voltage convention
  • Fuse switches
  • Primary & back-up relaying
  • Fault calculation
  • System earthing
  • Fuses as alternatives to circuit breakers
  • Auto-reclosers and auto-reclose operation


  • The history of switchgear
  • Principles of current interruption
  • Plain break circuit breakers
  • Bulk and small oil volume circuit breakers
  • Operating mechanisms
  • Transfer earth circuit breakers
  • Fixed and withdraw-able designs
  • Switchgear guidelines
  • Factors affecting switchgear selection


  • Easy and complex protection systems
  • Switchgear ancillaries, measurement CTs, VTs and relays
  • Substation and switch room layouts and design
  • Substation compound
  • Metal-clad switchgear maintenance
  • Symmetrical and asymmetrical breaking
  • Make and break operations
  • Cable terminations
  • Indoor and outdoor operation
  • Interpretation of test oscillograms


  • Overall safety measures and the importance of personal protective equipment (PPE)
  • Values of safety rules
  • Principles of personal authorization
  • Live training for the safe operation of switchgear
  • Isolation in a circuit breaker context
  • Safety documentation
  • Operative and safety locking and danger notices
  • Work safety in a substation environment
  • Safety interlocks
  • Substation alarms
  • Individual study tasks and presentation


  • Principles of time and condition-based asset management
  • Asset registers
  • Asset management systems
  • Case studies (ABB, Siemens, Schneider)


  • Switchgear inspection methodologies
  • Partial discharge measurement and survey
  • Timing tests
  • Mechanisms of deterioration
  • Circuit breaker diagnostic techniques
  • Principles of circuit breaker maintenance
  • Maintaining oil circuit breakers
  • Case study (circuit breaker settings, selectivity, sensitivity, speed)
  • Contact maintenance and contact wipe
  • Oil testing
  • Maintaining vacuum circuit breakers
  • Batteries – condition and monitoring
  • Switchgear defects and defect control systems


  • Construction (shell type and core type)
  • Insulation, windings, cooling systems, voltage levels, sizing and breathing
  • Transformer parts
  • Set up and control high voltage power transformers safely
  • Earthing of HV transformers


  • Electrical values and their role in a power transformer
  • Thermal functioning, loading, paralleling, connections and vectors


  • Surge protection
  • Protective relaying
  • Thermal tools and manoeuvres
  • Design and specifications of auto, generator, unit and station transformers


  • Oil contents: water, acidity and dissolved gas
  • Oil tests: breakdown, humidity, resistivity, interfacial tension, gravity and power factor
  • Recovery voltage measurement test


  • AC Tests (power factor, single-phase excitation current, transformer turns ratio)
  • DC Tests (insulation resistance, dielectric absorption, polarization index, step voltage, hi-pot)
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