The standard states that IEC 60270 remains the "reference" method when possible. However, when site noise makes electrical measurement impossible (e.g., a 400kV substation next to a radio tower), IEC 62478 is the legally accepted alternative for condition assessment.
You can try searching for the IEC 62478 PDF report on the following websites: iec 62478 pdf
┌───────────────────────────┐ │ Partial Discharge Event │ └─────────────┬─────────────┘ │ ┌───────────────────────┴───────────────────────┐ ▼ ▼ Electromagnetic Emissions Acoustic Shockwaves (HF / VHF / UHF Frequency Bands) (Ultrasonic Signals) │ │ ▼ ▼ Standardized by IEC 62478 Standardized by IEC 62478 Targeted Equipment The standard states that IEC 60270 remains the
The standard states that IEC 60270 remains the "reference" method when possible. However, when site noise makes electrical measurement impossible (e.g., a 400kV substation next to a radio tower), IEC 62478 is the legally accepted alternative for condition assessment.
You can try searching for the IEC 62478 PDF report on the following websites:
┌───────────────────────────┐ │ Partial Discharge Event │ └─────────────┬─────────────┘ │ ┌───────────────────────┴───────────────────────┐ ▼ ▼ Electromagnetic Emissions Acoustic Shockwaves (HF / VHF / UHF Frequency Bands) (Ultrasonic Signals) │ │ ▼ ▼ Standardized by IEC 62478 Standardized by IEC 62478 Targeted Equipment