Knowledge

The breakdown voltage of insulating oil is one of the most sensitive indicators of oil condition and of the internal health of a transformer. Because

At what measured value should I stop trending and start planning an outage? There is no universal pass/fail figure, because apparent charge depends on

The plant is full of drives, welding sets and radio traffic. How can I be sure the pulses I see come from the motor? Noise rejection is the core field

My instrument produces a phase-resolved discharge plot. What features distinguish the common defect types? PRPD (Phase-Resolved Partial Discharge) plo

Sensor choice is driven by the frequency range of the discharge, the noise environment and whether the machine can be opened. HFCT (High-Frequency Cur

What is the practical difference between an offline and an online partial discharge test on a motor, and which one should I specify? They answer two d

DC testing is not obsolete everywhere. It remains a valid method for paper-insulated lead-covered (PILC) cable, for some generator and motor insulatio

The table below summarises the four decisive differences between the two methods, followed by the test-parameter differences that follow from them.

FAQ 1: Why is DC Hipot testing considered a "hidden danger" for XLPE cables? Answer: The primary danger is Space Charge accumulation . Under

Why Test Transformer Turns Ratio? The turns ratio test (TTR test) is one of the most fundamental and revealing diagnostic measurements performed on a

FAQ 1: What is the difference between "Pre-commissioning Tests" and "Service Tests" in a substation? Answer: Pre-commissioning Tes

FAQ 1 Q: What is the "Triple Diagnostic" approach for MV cables, and why is a single test not enough? Answer: Medium voltage (MV) distribution cables-