COURSE OVERVIEW:

The effective maintenance of power transformers is essential for maximizing asset life and ensuring grid reliability. This course provides a technical framework for "Preventive and Predictive Maintenance," focusing on the systematic inspection of cooling systems, insulation health, and structural integrity. Participants will explore the mechanics of "Condition Monitoring," learning how to interpret diagnostic data to identify degradation in cellulose insulation and mineral oil before they escalate into functional failures.

The scope of this training addresses the practical workflows required for field interventions, including "On-Load Tap Changer" (OLTC) servicing and "Cooling System" optimization. It covers the technical nuances of "Insulation Drying," focusing on the methods used to remove moisture from the winding structure during major maintenance. The curriculum provides a detailed focus on "Post-Maintenance Verification," ensuring that participants can conduct the necessary tests to validate that the transformer is safe to return to service after a planned or unplanned outage.

Coverage includes the implementation of "Dissolved Gas Analysis" (DGA) as a primary tool for troubleshooting internal faults. Attendees will learn to manage "Power Resuming" sequences, focusing on the coordination between electrical protection clearing and system restoration. By combining mechanical maintenance skills with high-level electrical diagnostics, the course equips professionals with the expertise required to manage transformer fleets with a focus on "Zero-Incident" operations and minimized downtime.

COURSE OBJECTIVES:

After completion of this course, the participants will be able to:

• Define the stages of "Transformer Maintenance" (Daily, Annual, Major).
• Identify the signs of "Insulation Aging" and "Sludge Formation."
• Execute "Oil Sampling" procedures for DGA and chemical analysis.
• Perform "OLTC Maintenance" including contact inspection and timing.
• Troubleshoot "Cooling Fan" and "Oil Pump" failure modes.
• Implement "Moisture Removal" techniques for transformer insulation.
• Analyze "DGA Results" using the Duval Triangle and Rogers Ratios.
• Conduct "Tan-Delta" and "Capacitance" tests for bushing health.
• Verify "Protective Relay" operation before power restoration.
• Execute "Safe Isolation" (LOTO) for transformer maintenance.
• Manage "Power Resuming" protocols after a fault investigation.
• Document "Maintenance History" for asset lifecycle management.

TARGET AUDIENCE:

This course is intended for Maintenance Engineers, Substation Technicians, Asset Reliability Specialists, and Electrical Supervisors responsible for transformer health.

TRAINING COURSE METHODOLOGY:

A highly interactive combination of lectures, discussion sessions, and case studies will be employed to maximize the transfer of information, knowledge, and experience. The course will be intensive, practical, and highly interactive. The sessions will start by raising the most relevant questions and motivating everybody to find the right answers. The attendants will also be encouraged to raise more of their questions and to share in developing the right answers using their analysis and experience. There will also be some indoor experiential activities to enhance the learning experience. Course material will be provided in PowerPoint, with necessary animations, learning videos, and general discussions.

The course participants shall be evaluated before, during, and at the end of the course.

COURSE CERTIFICATE:

National Consultant Centre for Training LLC (NCC) will issue an Attendance Certificate to all participants completing a minimum of 80% of the total attendance time requirement.