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Masterclass in High Voltage Cable Diagnostics & Fault Location

In-person Training

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This training provides focused theoretical and hands-on instruction on high-voltage cable testing, diagnostics, and fault location, covering cable construction, failure modes, safety requirements, and international standards. Participants will perform and interpret insulation resistance, VLF withstand, Tan δ, and partial discharge (PD) tests in accordance with IEEE and IEC guidelines and apply PD analysis for condition assessment of HV cables and other power assets. The course also develops practical competency in cable fault pre-location and pinpointing using TDR, bridge methods, surge generators, acoustic detection, and sheath fault location, with extensive demonstrations and hands-on exercises using industry-standard diagnostic equipment.

Who Should Attend

Electrical Engineers, Testing & Commissioning Engineers, Substation Technicians, Utility & Power Distribution Teams, Industrial Plant Electricians, EPC Contractors, Asset Management & Condition Monitoring Personnel, Technical Managers, Graduate Engineers, and Testing Labs.

By the end of this 2-day program, the participants will be able to:

  • Understand HV cable construction, failure mechanisms, safety requirements, and applicable IEEE/IEC standards for cable testing and diagnostics.
  • Perform and evaluate insulation resistance, VLF withstand, Tan δ, and partial discharge (PD) tests for accurate cable condition assessment.
  • Analyze PD data, including phase-resolved patterns and interference mitigation, to identify insulation defects and degradation.
  • Apply cable fault pre-location and pinpointing techniques using TDR, bridge methods, surge generators, acoustic detection, and sheath fault location.

Day 1: HV Cable Fundamentals and Field Diagnostic Testing

  • Understand HV cable construction, failure modes, and safety practices directly applicable to field testing operations.
  • Select and apply appropriate IEEE 400.2–based test standards and voltages for different cable types and site conditions.
  • Perform insulation resistance, VLF withstand, and Tan δ tests with correct field set-up, clearances, and test procedures.
  • Interpret test results to assess cable condition, recognizing practical limitations and risks in real-world applications.

Cable Fault Location and On-Site Diagnostics

  • Classify cable fault types and understand their real-world causes and implications.
  • Apply HV safety practices while conducting cable fault location in the field.
  • Perform pre-location and TDR-based fault detection for efficient on-site troubleshooting.
  • Pinpoint faults using acoustic, audio frequency, and sheath detection methods for practical repair planning.


Day 2: Partial Discharge Testing – Fundamentals and Field Application

  • Grasp PD theory and measurement principles for HV cables and power equipment.
  • Perform off-line PD tests using standard detectors and sensors in field settings.
  • Analyze PD results, interpret phase-resolved patterns, and mitigate interference for accurate diagnostics.
  • Conduct hands-on PD mapping to detect insulation defects and assess cable condition practically.

Advanced Partial Discharge Measurement and Field Diagnostics

  • Use advanced PD techniques (RFI, UHF, TEV, acoustic) for HV asset diagnostics.
  • Perform on-line and off-line PD measurements on switchgear, transformers, motors, and cables in the field.
  • Analyze complex PD data for accurate insulation assessment and defect detection.
  • Gain hands-on experience detecting and troubleshooting PD defects using multiple detector types.