Current injection testing is a diagnostic method used to verify the performance of protective devices like circuit breakers and relays.

A specialized test set injects a controlled electrical current to simulate an overcurrent or fault condition, ensuring the device trips correctly.

Routine electrical testing of transformer bushings is essential for early detection of insulation problems and preventing catastrophic failures. The most commonly used tests are capacitance and tan delta, insulation resistance, and power factor. Advanced diagnostics like DFR and PD testing provide deeper insights and are increasingly used in condition-based maintenance programs.

A gas chromatography machine is essential because it performs Dissolved Gas Analysis (DGA), the single most effective “blood test” for a transformer. It verifies the requirements for carrier gas purity and the machine’s calibration stability for accurate results.

Owning a current injection tester is a strategic investment. The real ROI comes from reduced downtime and operational flexibility, which far outweighs the initial cost and ongoing service fees.

After a substation trip, a portable gas chromatograph is your essential first-response tool. It provides rapid, critical data to ensure safety, protect valuable assets, and guide your next steps effectively.

Dielectric tests, or Hipot tests, are essential for verifying insulation strength. They differ from insulation resistance tests and are a non-destructive way to confirm electrical equipment safety and prevent unexpected failures.

Dissolved gas analysis (DGA) of transformer oil is a technique that measures the types and concentrations of gases dissolved in transformer insulating oil. The cost depends on your method. Sending a sample to a lab costs between $100 and $500 per test. Buying a portable analyzer is a one-time cost of $15,000 to $50,000. An online monitor can cost $25,000 to over $100,000 to install.

An HV test kit is an essential tool for electrical safety and reliability. Understanding the correct procedures for testing different assets like cables and transformers ensures you get accurate results and prevent catastrophic failures.

Testing a 22kV cable properly is crucial for power system reliability. Using a sequence of sheath, insulation resistance testing, and VLF hipot tests ensures your cable is sound and ready for service.