ICTD International Centre for Training and Development

High Voltage Switching Safety, Operations and Maintenance

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About the course

This course will feature the importance and relevance of switching in High Voltage Power Systems in operation and maintenance. Engineers and technicians will familiarize themselves with relevant safety procedures and practices used for its implementation. General guidance to safety and practical examples of Management Systems will be presented as well as necessity of having procedures during operation and maintenance.

Technical aspects of switching devices as well as their maintenance requirements are briefly included in the seminar in order to understand the risks associated with switchgear operation. Aspects of modern maintenance techniques in asset managements will be covered at the level appropriate for this seminar.

In addition to the procedures for safe switching the seminar will provide examples of incidents following misconducts or equipment failure. Investigation procedures for such incidents will be discussed following the internal actions and fulfilling the legislative aspect.

Course Objectives

At the end of the training, the participants will be able to:

  • Understand what are the hazards associated with switching
  • Correctly select and use of equipment
  • Learn the actions in respect to safety
  • Learn how to assess safe working practices
  • Discuss network operator’s procedures
  • Discuss and understand Set of Distribution Safety Rules through examples

Course Outline

Day 1

  • Switching in Power systems
  • Manual
  • Automatic
  • On protection operation
  • Standards Guides and Code of Practice
  • General guidance to work safely
  • Health and Safety Executive (HSE) booklet entitled Electricity at Work – Safe Working Practices
  • What are the hazards?
  • Correct selection and use of equipment
  • Actions for managers and supervisors
  • Assessing safe working practices

Day 2

  • Management systems
  • Policies and procedures covering the installation, commissioning, operation, maintenance and removal of the equipment;
  • An appropriate system of records;
  • Definition of responsibilities and training requirements;
  • Auditing of the effectiveness of procedures
  • Technical aspect of switchgear
  • Safe switching (operation) of the switchgear
  • Potential problems with switchgear
  • Lack of knowledge
  • Modification
  • Dependent manual operating mechanism
  • Lack of maintenance

### Day 3

  • Earthing
  • Technical Requirements
  • Safety requirements
  • Site Safety Management
  • Safe Isolation
  • Electrical Permits to work
  • Switching operation for maintenance
  • Deciding whether to work dead or live
  • Actions common to both dead and live working
  • Working dead
  • Working live
  • Operational Issues
  • Fault level and ratings
  • Effect of on-site generation and other large rotating machines
  • Precautions for reducing the risk of swg failure and injury

Day 4

  • Switching to enable safe working
  • Equipment isolation
  • Additional precaution
  • Network operator’s procedures
  • Set of Distribution Safety Rules (Example)

### Day 5

  • Typical example of an electrical permit-to-work
  • Records
  • Network diagrams
  • Asset register
  • Maintenance records
  • Maintenance of oil CBs
  • Risks and Hazards associated with CB operation
  • Inspection
  • Condition Monitoring
  • Reliability Centered maintenance
  • Refurbishment and replacement
  • Maintenance of SF6 CBs

Course Methodology

A variety of methodologies will be used during the course that includes:

  • (30%) Based on Case Studies
  • (30%) Techniques
  • (30%) Role Play
  • (10%) Concepts
  • Pre-test and Post-test
  • Variety of Learning Methods
  • Lectures
  • Case Studies and Self Questionaires
  • Group Work
  • Discussion
  • Presentation

Who should attend

This course is designed for engineers, technicians and managers who are likely to be in position to carry on switching or work on parts of the system isolated by switching or manage work under those circumstances. Managers at decision-making positions should also be aware of legal obligations if not complying with procedures and code of practice. This course is also valuable for Operational staff and managers working in industrial and distribution systems, Maintenance engineers and technicians, Site Managers, Site Engineers and Senior Technicians working in Electrical Utility Companies, System and Substation Design Engineers working on Control and Earthing design.

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