The standard applies universally to any high-voltage asset susceptible to localized dielectric breakdown:
If you are going to purchase the PDF, you need to know what you are buying. The standard is roughly 80-100 pages and covers the following critical aspects: iec 62478 pdf
: Unlike electrical PD measurement (measured in Picocoulombs), EM and acoustic methods often use "sensitivity checks" because absolute calibration is difficult due to signal attenuation. Sensor Specifications The standard applies universally to any high-voltage asset
No. While optical detection of PD (UV light from corona) is a technology, IEC 62478 specifically excludes optical methods. It strictly focuses on Acoustic (vibrations) and Electromagnetic (radio waves). While optical detection of PD (UV light from
| Feature | IEC 60270 | IEC 62478 | | :--- | :--- | :--- | | | Electrical (Coupling capacitor) | Acoustic & Electromagnetic | | Unit of measure | picoCoulombs (pC) – Apparent charge | mV (Acoustic) / dBm (RF) | | Calibration | Direct charge injection (pC) | Signal generator / Ball impact | | Best use case | Factory acceptance tests (Low noise) | On-site field tests (High noise) | | Quantification | Measures severity (charge) | Measures location & presence |
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