COURSE OVERVIEW:

In high-voltage networks, the accurate measurement of voltage is essential for both revenue metering and system protection. This course provides a technical framework for "Voltage Transformers" (VT) and "Capacitor Voltage Transformers" (CVT), focusing on the reduction of primary transmission voltages to standardized levels for relay and meter interface. Participants will explore the mechanics of "Electromagnetic Induction" and "Capacitive Division," learning how to ensure measurement accuracy while maintaining electrical isolation between HV and LV circuits.

The scope of this training addresses the full spectrum of VT applications, from "Indoor MV" cast-resin units to "Outdoor HV" oil-filled CVTs. It covers the technical nuances of "Accuracy Classes" (0.2, 0.5, 3P, 6P), focusing on the impact of "Secondary Burden" and "Voltage Drop" on measurement precision. The curriculum provides a detailed focus on "Diagnostic Testing," ensuring that participants can execute ratio, polarity, and tan-delta tests to verify the health of the insulation and the integrity of the secondary windings.

Coverage includes the implementation of "Ferroresonance" mitigation and the management of "VT Fusing" and protection. Attendees will learn to troubleshoot "Measurement Errors," analyze "Transient Responses" in CVTs during fault conditions, and perform "Phasing-out" checks for new installations. By combining electrical theory with practical testing protocols, the course equips professionals with the expertise required to manage voltage measurement assets that meet international utility standards for reliability and safety.

COURSE OBJECTIVES:

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

• Define the differences between "Inductive VT" and "Capacitive CVT."
• Identify "Accuracy Classes" for metering and protection applications.
• Execute "Voltage Ratio" and "Polarity" verification tests.
• Perform "Insulation Resistance" and "Tan-Delta" for CVT health.
• Calculate "Secondary Burden" and its impact on accuracy.
• Implement "Ferroresonance" damping and suppression schemes.
• Verify "VT Secondary Circuit" continuity and voltage drop.
• Troubleshoot "Phase Shift" and "Magnitude Errors" in measurement.
• Execute "Phasing-out" checks for dual-busbar substations.
• Manage "VT Fusing" and "MCB" coordination for secondary protection.
• Conduct "Oil Level" and "Gas Pressure" (SF6) inspections.
• Document "VT Calibration Reports" and commissioning data.

TARGET AUDIENCE:

This course is intended for Substation Engineers, Protection and Control Technicians, Metering Specialists, and Electrical Inspectors.

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.