Category Technical FAQs

Learn best practices for managing high voltage testing teams, including team roles, communication, safety procedures, documentation, and field testing efficiency.

Learn how to perform safe AC high voltage cable testing on site, including preparation, safety steps, test procedures, and result documentation.

Learn common cable installation problems found during high voltage testing, including joint defects, termination issues, insulation damage, and moisture problems.

Learn about cable insulation testing methods before energization, including AC withstand, VLF, DC, and partial discharge tests for power cable systems.

Learn what CT ratio error and phase displacement mean, their causes, effects on measurement and protection, and how engineers evaluate CT accuracy.

Learn what CT accuracy class means and understand the difference between Class 0.2, 0.5, 5P, and 10P for measurement and protection applications.

Learn how to select the right current transformer for metering and protection applications, including CT ratio, burden, accuracy, and application requirements.

Learn how to perform CT saturation testing with a CT analyzer, including excitation tests, knee point tests, result analysis, and testing steps.

Learn the difference between CT saturation and CT accuracy, including accuracy class, protection CT performance, burden, and saturation risks.

Learn how CT saturation affects differential, transformer, busbar, and overcurrent protection systems and why CT performance matters.

Learn the CT commissioning procedure before substation energization, including testing steps, preparation, safety checks, and performance verification.

Learn how CT testing helps prevent protection system failures by identifying ratio errors, polarity issues, saturation risks, and burden problems.