Pdf: Iec 60815-2
IEC 60815-2 defines four main Site Pollution Severity (SPS) classes for AC:
| SPS Class | Typical Environment | ESDD (mg/cm²) | Recommended USCD (mm/kV) | |-----------|---------------------|---------------|--------------------------| | a – Light | No industrial, inland, low density housing | < 0.03 | 16 – 20 | | b – Medium | Industrial areas, moderate coastal | 0.03 – 0.10 | 20 – 25 | | c – Heavy | Heavy industry, high coastal salt, desert with dust | 0.10 – 0.60 | 25 – 31 | | d – Very Heavy | Desert with salt/conductive dust, sea spray, high ESDD | 0.60 – 2.0 | 31 – 43+ |
Note: For very severe cases (>2.0 mg/cm² ESDD), custom dimensioning or mitigation (e.g., washing, coating) is required.
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IEC 60815-2 Overview
IEC 60815-2 is a standard published by the International Electrotechnical Commission (IEC) that provides guidelines for the selection of surge arresters for power systems. Specifically, this part of the standard deals with surge arresters for power systems with voltages above 1 kV.
Title: IEC 60815-2:2018 - Surge arresters - Part 2: Surge arresters for power systems with voltages above 1 kV
Scope: This standard applies to surge arresters designed to protect the insulation of power equipment against overvoltages. It covers metal-oxide surge arresters (MOSAs) without gaps and composite surge arresters.
Key Aspects:
IEC 60815-2 PDF Download
You can purchase the IEC 60815-2 standard from the IEC website or other authorized distributors. Unfortunately, I won't be able to provide a direct PDF download link, as these standards are copyrighted and require purchase or subscription.
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Since I cannot provide a direct PDF download of the copyrighted standard, I have prepared a comprehensive technical report summarizing the key concepts, scope, and methodology defined in IEC 60815-2.
IEC provides ranges mapping ESDD/NSDD to pollution severity levels (light, medium, heavy). These categories inform design choices: higher pollution → larger creepage distance or hydrophobic/recoverable surfaces. IEC 60815-2 defines four main Site Pollution Severity
The core formula provided in IEC 60815-2 for determining the required Unified Specific Creepage Distance ($L_us$) is generally expressed as:
$$L_us \ge L_ref \times K_ad \times K_cs \times \dots$$
Where:
If you work in a substation near a cement plant, along a coastline, or downwind of a chemical factory, you know the struggle. The quiet "crackle" of contamination flashovers is the sound of money burning and unplanned downtime.
While most engineers are familiar with IEC 60815-1 (the general guidelines for insulator selection), many overlook the specific heavy hitter: IEC 60815-2. Note: For very severe cases (>2
Let’s dive into what this specific standard contains, why you need the PDF on your desktop, and how it saves your medium and high voltage lines from failing.
