Earth fault factor and the arrester TOV curve, why 0.1 Hz cuts source power by 600, the cycle-count trap below 0.1 Hz, and the full four-hour field campaign.

From loss of hydrophobicity to the carbon track: dry band arcing, the inclined plane test, salt fog at component level, and how to write climatic requirements.

Why a transformer can pass every dielectric test and still carry a silent deformation, and how the frequency signature exposes it when the comparison is valid.

Loss physics, the Schering bridge and its digital successor, choosing the measurement mode, individual temperature correction, and eight cases where the number lies.

Where the quantity came from, how the quasi-peak detector weights repetition rate, which standards still require RIV, and how to read a combined RIV and PD campaign.

Cavity, corona, surface and floating electrode physics; the circuit and its calibration; per-family limits; PRPD reading; and the non-conventional methods.

Mica-epoxy tolerates PD by design. IR and PI minimums by family, surge testing for turn insulation, and the operate-monitor-rewind verdict.

ZnO varistor physics, the five defining voltages, routine and type tests, operating duty and thermal stability, and resistive leakage diagnostics.

Interruption at current zero and transient recovery voltage, micro-ohm and timing routine tests, the T10 to T100a duties, and disconnector classes.

Covered against shielded construction, water and electrical trees, routine PD on every length, VLF and tan delta field diagnostics, fault location.

Accuracy classes and the burden window, the two incompatible knee point definitions, transient sizing and remanence, and CVT ferroresonance.

The full factory routine sequence, ratio and resistance references, loss measurement, applied against induced voltage, IVPD and impulse comparison.

Routine, type and special tests, the ten cross-cutting procedures with their numeric criteria, and why the test sequence protects the evidence.

Traceability chains, approved against reference measuring systems, GUM uncertainty budgets, and the statistics behind U50, U10 and the 15/2 test.

Corona and the Peek criterion, contact resistance and hot spots, stray oscillation, field and harmonic distortion, ground loops and cable routing.

Current impulse parameters and integrals, RLC and pulse forming network generators, shunts against Rogowski coils, and the 1 K per hour rule.

Impulse dividers and step response, cable reflections at 5 ns per metre, digitizer requirements, and telling a real oscillation from an artifact.

Standard impulse waveshapes and virtual parameters, the IEC 60060-1 overshoot treatment, Marx generator arithmetic, and the volt-time curve.

Rectifier columns and peak inverse voltage, ripple design formulas, the Cockcroft-Walton cascade, rod-rod gaps, and leakage current as diagnosis.

Resistive and capacitive dividers, sphere gaps to IEC 60052 with atmospheric corrections, scale factors, and hunting systematic error.