HV/LV Switching / Safe Isolation of High and Low Voltage Power Systems

Dynamic and highly concentrated, this course places maximum emphasis on safety when working on or near energized electrical equipment.

This training will provide an understanding of industrial high and low voltage power systems, including statutory regulations, safe operation, and protection of power installations. Also to enable candidates to perform HV & LV switching operations on HV & LV networks up to and including 10kV, and to prepare them for HV authorization in accordance with their companies’ safety rules/regulations.

Personnel who are to be responsible as senior authorized electrical persons (SAEP) for isolations, switching, and issue of electrical permits, isolation certificates or other safety documents can participate in this training.


Course content:

Electrical Hazards and Precautions

  • Electric Shock
  • Effect of Electrical Current on the Human Body
  • Arc and Blast
  • Earthing (Or Grounding)

The Electricity at Work Regulations 1989

  • Introduction
  • Summary Check List
  • Provisions of the Regulations
  • The Regulations
  • Regulations Interaction

Operational and Safety Features Of Switchgear

  • Basic Requirements
  • Control
  • Isolation
  • Earthing
  • Awareness when Operating Switchgear

Substation/Switch-Rooms and Safety Requirements

  • Introduction
  • Land-based substations
  • Transmission substations
  • Distribution substations
  • Sub-transmission substations
  • High voltage switchrooms
  • Substation/switchroom equipment
  • Switchgear and control gear
  • Transformers
  • Protection
  • Tripping supplies
  • Earthing
  • Security
  • Access and lighting
  • Equipment identification

BP AZ Operational Safety Rules

Secondary Hazards and Emergency Conditions

  • Secondary Hazards
  • Emergency Conditions

Operational Procedures

  • Introduction to Operational Procedures
  • Use of Operational Procedure, Safe Documents, and Safe Working Procedure
  • Safe Working Procedure to be adopted following
  • Completion of the Isolation Element of Switching Exercise
  • Operational Procedures-Example 1
  • Operational Procedures-Example 2
  • Operational Procedures Tutorial

Key Safe and Multihasp Systems

  • Key Safes
  • Multi-Hasp Systems

Outline of the use of Electrical Protection in Industrial Power Systems

  • Introduction
  • Fault Energy
  • Fuses
  • Current Transformers (CTs)
  • Voltage Transformers (VTs)
  • Relay Protective Devices
  • Protection Schemes
  • Protection Symbols
  • Protection Relay Codes

Questionnaire (45 Questions, not multichoice)

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