Iec 60815-2 Pdf -

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However, I can provide you with a detailed technical summary and analysis of IEC 60815-2, which you can use as a foundation for your own report. Here is a structured report based on the publicly available scope and known technical content of the standard. iec 60815-2 pdf

2. Scope

  • Applicable to: Ceramic (porcelain) and glass insulators for AC systems > 1,000 V.
  • Frequency: 50 Hz and 60 Hz.
  • Conditions: Naturally polluted environments (industrial, desert, coastal, agricultural dust, etc.).
  • Not covered: DC systems (see IEC 60815-3), polymeric insulators (see IEC 60815-4), or indoor insulators under clean conditions.

Why you can’t rely on "One Size Fits All" creepage distance

Most utilities have a rule of thumb: "Use 25 mm/kV for clean areas, 31 mm/kV for polluted." IEC 60815-2 blows that simplification out of the water. I understand you're looking for a full report

The standard forces you to consider Site Severity Levels (SSL) . Instead of guessing, you categorize your pollution into 5 distinct classes (a to e): Applicable to: Ceramic (porcelain) and glass insulators for

  • a (Light): No industries, low density housing.
  • b (Medium): Areas with non-fertilizer industries or low vehicle density.
  • c (Heavy): High industrial density, coastal areas with salt spray.
  • d (Very Heavy): Desert edges, cement factories, heavy coal dust.
  • e (Extreme): Literally crusted with conductive mud or conductive dust.

8. Practical Application Examples

Example 2: 66 kV substation near heavy industry (Heavy pollution)

  • SPS = Heavy (c)
  • Base USCD = 28 mm/kV
  • Creepage required = 28 × (66 / √3) = 28 × 38.1 = 1,067 mm
  • Standard profile is sufficient.

What it is (short)

IEC 60815-2 is the international standard that gives procedures for selecting and testing insulators used on overhead power lines, focusing on how to evaluate pollution performance and determine the necessary electrical stress (power-frequency withstand, switching impulse, etc.) for long-term service in polluted environments. Part 2 specifically covers laboratory and site test methods and guidance for assessing pollution severity and how to apply those results to insulator selection.

Quick reference — useful terms

  • ESDD: Equivalent salt deposit density (mg/cm²)
  • NSDD: Non-soluble deposit density (mg/cm²)
  • Creepage distance: surface distance along insulator between live parts
  • Flashover: unintended arc across the insulator surface
  • Hydrophobicity: water-repellency rating (recovery behavior matters)

3. Key Terminology (as defined in the standard)

| Term | Meaning | |------|---------| | USCD | Unified Specific Creepage Distance – creepage distance (mm) divided by √3 × nominal line-to-line voltage (kV). Units: mm/kV. | | SPS | Site Pollution Severity – a classification of pollution levels at the installation site. | | DD | Deposit Density (mg/cm²) – Non-soluble deposit density. | | ESDD | Equivalent Salt Deposit Density (mg/cm²) – Soluble pollution converted to equivalent NaCl. | | Creepage distance | Shortest distance along the insulator surface between metal fittings. |