Learn how current transformers (CTs) work, including operating principles, clamp-on CTs, Rogowski coils, and safety rules. Understand CT applications in high-voltage systems, metering, and protection.

Learn the difference between hi-pot testers and megohmmeters, how each insulation test works, and when to use them. Understand safety testing vs resistance measurement for electrical equipment.

Learn how transformer TTR testing works, why it matters, and what affects measurement accuracy. Discover step-up vs step-down methods, errors, and best practices for reliable transformer diagnosis.

Discover what a lead acid battery tester is and how it works. Learn key features, testing methods, industry applications, maintenance timing, and how it improves battery performance and lifespan in automotive, industrial, and energy systems.