Substation maintenance is a key part of any plant’s maintenance program. Failures in key components such as racking mechanisms, meters, relays and busses are the most common cause of unplanned outages. Transmission, distribution and switching substations generally have switching, protection and control equipment and one or more transformers. Having skilled substation maintenance technicians is essential to equipment reliability.

Course Contents:

  • Introduction to Maintenance Strategies
  • Introduction to NETA MTS / NFPA 70B
  • Substation Types (AIS, GIS, Bus bar Types)
  • Substation Components
  • Disconnectors – Overview
  • Periodic maintenance and checks for disconnectors
  • Circuit Breaker Basics
  • OEM Manuals Introduction
  • Maintenance – Inspection, CBM and overhauling
  • SF6 Gas handling
  • CBM methodologies for Substations:
    • Physical Inspection Checklists Formulation
    • Partial Discharge (Using RFI, HFCT, Ultrasound, etc)
    • Thermography
    • UV Camera for Corona
  • Surge Arrestor OEM guidelines
  • Surge Arrestor Basics & Failure Modes
  • Battery 240 VDC: General Operation and Maintenance Guidelines
  • Battery 48 VDC: General Operation and Maintenance Guidelines
  • AC/DC Panels
  • Battery Charger: Basics and O&M Guidelines
  • Transformer Basics
  • OEM Guidelines for maintenance
  • Oil Testing
  • General CT: ratings/types/classes
  • General PT: ratings/types/classes
  • O&M guidelines of OEM for CT
  • O&M guidelines of OEM for PT
  • EPM strategies for CT/PT of 500 KV


Irfan Akhtar (PE, ME, BE) 22+ Years of Experience. Expert in Asset Management, Project Management, Construction, Feasibility Studies, O&M of Power Plants, Condition Assessment of Electrical Equipment, Consultancy Services, Owner Engineer, Project Management, Reliability Centered Maintenance.