Training Earthing System in Substations

Training Earthing System in Substations

INTRODUCTION

Substation earthing system is essential not only to provide the protection of people working in the vicinity of earthed facilities and equipment against danger of electric shock but to maintain proper function of electrical system. Reliability and security are to be taken in considerations as well as adherence to statutory obligations (IEEE and Indian standards on electrical safety. Earthing system design, thus, must be easily maintained and future expansion must be taken into account while designing the dimensions of earth mat. This course covers all details of an Earithing System in Substations including design, installation, and maintenance of the system. 

PROGRAMME OBJECTIVES

• Enhancing your knowledge of earthing principles and systems
• Developing your ability to specify earthing system design to current standards
• Reducing the risk of critical system failure through enhanced design
• Enhancing your understanding of the role of earthing systems in safe working practices
• Enhancing your understanding of earthing measurement processes and the analysis of measurement data
• Developing knowledge of managing earthing system design and maintenance projects

WHO SHOULD ATTEND?

• Technicians 
• Engineers
• Plant managers

PROGRAM OUTLINE

• • Introduction to earthing systems in substations 
  • Components of earthing system
  • Fundamental requirements
  • Earthing of substation equipment
  • The points of earthing in an electrical substation
  • Method of earthing

• • Design of earthing system for a substation
  • Data needed for design of earthing
  • Fault clearing time
  • Determination of maximum grid current
  • Selection of electrode material
  • Mathematical description
  • Safe limits and values of potentials
  • design procedure
  • Significance and touch voltage

• • Construction of earthing systems
  • Jointing conductors and equipment connections
  • Above & below ground earthing installations
  • HV cable metallic sheath / armour earthing
  • Light-current equipment associated with external cabling
  • Metal clad and gas insulated (GIS) substations
  • Fault throwing switches, earth switches and disconnectors
  • Operating handles, mechanisms and control kiosks
  • Measurements

• • Safety in grounding
  • Range of tolerable current
  • Accidental ground circuit
  • Criteria of tolerable voltage
  • Design in difficult conditions
  • Risk assessment

• Maintaining & repair of earthing systems
• Frequent visual inspection 
• Infrequent detailed visual inspection
• Detailed visual inspection, testing and analysis
• Procedure for the remaking defective joints