COURSE OVERVIEW:

The security of power transformers depends on a coordinated system of electrical and mechanical protections that detect and isolate faults within milliseconds. This course provides a technical exploration of "Protection Philosophy," focusing on the application of differential, overcurrent, and restricted earth fault schemes. Participants will explore the mechanics of "Fault Analysis," learning how to design settings that distinguish between harmless magnetizing inrush and genuine internal winding failures.

The scope of this training addresses the integration of "Mechanical Protections" into the electrical tripping logic, ensuring a comprehensive safety net for the asset. It covers the technical nuances of "Numerical Relays," focusing on the configuration of biased differential characteristics and harmonic restraint. The curriculum provides a detailed focus on "Functional Interlocking," ensuring that participants can design and troubleshoot logic that prevents accidental operation and ensures sequential tripping of HV and LV circuit breakers.

Coverage includes the implementation of "Restricted Earth Fault" (REF) protection for high sensitivity to winding-to-ground faults. Attendees will learn to calculate "Protection Settings" based on transformer impedance and short-circuit levels, utilize "Logic Diagrams" to verify tripping matrices, and manage "Back-up Protection" coordination. By combining advanced protection theory with practical setting applications, the course equips professionals with the expertise required to engineer and maintain robust transformer protection architectures.

COURSE OBJECTIVES:

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

• Define the "Protection Zones" for a power transformer.
• Identify the sources of "Relay Mis-operation" (Inrush, Overfluxing).
• Configure "Biased Differential Protection" (87T) characteristics.
• Implement "Harmonic Restraint" to prevent nuisance tripping.
• Design "Restricted Earth Fault" (REF) schemes for high sensitivity.
• Calculate "Overcurrent" (50/51) and "Earth Fault" (50N/51N) settings.
• Integrate "Buchholz" and "PRD" signals into the tripping logic.
• Develop "Tripping Matrices" for multi-breaker configurations.
• Execute "Fault Analysis" using relay disturbance records.
• Troubleshoot "Control Logic" and inter-relay communications.
• Verify "Interlocking Schemes" for OLTC and cooling control.
• Document "Protection Setting Sheets" and coordination studies.

TARGET AUDIENCE:

This course is intended for Protection Design Engineers, Substation Technicians, Electrical Consultants, and Maintenance Engineers involved in grid protection and control.

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.