Practical HV and LV Switching Operations and Safety Rules

THE WORKSHOP

In this workshop, we will take a look at the theoretical aspects of safety as well as the practical and statutory issues. One of the main causes of electrical accidents is said to be incorrect isolation of the circuits where work is to be done. To ensure safety of operators and maintenance personnel, proper switching procedures are necessary and more so when the circuits have multiple feeds and are complex. The possibility of voltage being fed back from secondary circuits needs to be considered as well. This workshop emphasises on the isolation procedures to ensure proper and safe isolation of HV, LV and secondary circuits.

Electrical safety is not just a technical issue. Accidents can only be prevented if appropriate safety procedures are evolved and enforced. This includes appropriate knowledge of equipment and systems imparted through systematic training to each and every person who operates or maintains the equipment. We will cover all these aspects in detail.

WHAT IS INCLUDED?

  • Receive a certificate of attendance in support of your continuing professional commitment
  • All workshops include the associated hardcopy technical manual
  • Printed workshop handouts
  • Lunch and refreshments
  • Interact and network with workshop attendees and experienced instructors
  • Practical, industry driven content to assist you in your continuing professional development (CPD)
  • Attendees automatically become IDC subscribers and receive exclusive deals and technical content every month

WHO SHOULD ATTEND?

  • Building service designers
  • Consulting engineers
  • Data systems planners and managers
  • Electrical and instrumentation technicians
  • Electrical engineers
  • Instrumentation and control engineers
  • Maintenance engineers
  • Power system protection and control engineers
  • Project engineers

CONTENT SUMMARY

BASIC THEORY OF ELECTRICAL SAFETY

  • Electrical shock - why does it happen?
  • Touch and step potential (voltage)
  • Direct and indirect contact
  • Role of electrical insulation in safety
  • Avoiding electric shock – different approaches
  • Earthing of power supply systems and its safety implications
  • Role of earthing of equipment enclosures (protective earthing) in human safety
  • Earthing in outdoor installations

ARC FLASH HAZARD AND SAFETY MEASURES

  • Arc flash definitions
  • Hazards presented by arc flash
  • Causes of arc flash
  • Arc blast and its consequences
  • Concept of incident thermal energy
  • Arc flash protection program

SAFE OPERATION AND MAINTENANCE OF ELECTRICAL EQUIPMENT

  • Key safety issues in O&M of electrical installations
  • Isolation and earthing of equipment
  • Use of warning signs for operation and maintenance
  • Safety while working in outdoor switchyards and overhead lines
  • Work on underground cable systems
  • Use and upkeep of safety appliances in substations and other electrical premises
  • First-aid for burns and electric shock

COORDINATING PERMIT ACCESS AUTHORITY PROCEDURES

  • Requirements for access to electrical equipment
  • Planning for switching and isolationDocument management
  • Communication in switching and isolation
  • Auditing of switching and isolation procedures

OVERVIEW OF HV SWITCHING OPERATIONS

  • HV equipments - components and apparatus
  • Fundamentals of HV switching operations
  • HV switching operations safety
  • Restriction pertaining to HV switching equipment
  • Isolation of HV transmission and distribution systems
  • Commissioning and maintenance of HV equipments

OVERVIEW OF LV SWITCHING OPERATIONS

  • LV equipments - components and apparatus
  • Fundamentals of LV switching operations
  • LV switching operations safety
  • Commissioning and maintenance of LV equipment

SECONDARY ISOLATION PROCEDURES

  • Fundamentals of secondary isolations
  • Communications for secondary isolations
  • Procedural and technical aspects

APPLICABLE REGULATIONS AND STANDARDS ON SAFETY

  • Necessity of safety rules and standards on safety
  • Acts and regulations dealing with safety at the work place
  • Regulations related to usage of electricity
  • Regulations related to supply of electricity
  • Standards for wiring, design and selection of LV installations

ORGANISATIONAL ASPECTS OF SAFETY

  • Environment, health and safety policy of the organisation
  • Mandatory compliance to statutory requirements
  • Monitoring safety compliances
  • Safety training
  • Role of an organisation in ensuring/improving work safety

DISCUSSION

HV and LV switching operations, specific hazards and safety rules applicable (these can be organisation-specific for on-site courses)

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