60815-2 Pdf | Iec

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.

| Feature | IEC 60815 (1986) | IEC 60815-2 (2008) | |---------|------------------|---------------------| | Pollution classes | 4 (Light to Very Heavy) | 4, but refined ESDD ranges | | USCD guidance | Fixed values (e.g., 25 mm/kV for heavy) | Ranges with correction factors | | Voltage correction | No | Yes | | Shape correction | No | Yes (K₁) | | DC guidance | No | Separate part (60815-3) |

Imagine you are a utility engineer tasked with replacing a failed glass insulator string on a 132 kV line running 8 km from a cement factory and 5 km from the coast.

Step 1 – Classify the pollution (per IEC 60815-2): The combination of cement dust (conductive when wet – high NSDD) and salt spray (high ESDD) pushes the site into Level d – Very Heavy.

Step 2 – Select specific creepage: From Table 2 (Level d → 31–43 mm/kV). Choose 38 mm/kV as a conservative interim value.

Step 3 – Calculate required creepage distance:
System voltage (Um) = 145 kV (max operating voltage for a 132 kV system).
Required creepage = 38 mm/kV × 145 kV = 5,510 mm.

Step 4 – Choose a standard insulator: A common 146 mm/kV cap-and-pin unit has a creepage of ~320 mm. Number of units needed = 5510 / 320 = 17.2 → 18 units. A typical clean-air 132 kV string might use only 9-10 units. Pollution doubles the requirement.

Step 5 – Verify mechanical load: Longer strings add weight and wind load. If the existing tower cannot support 18 units, you either:

Thus, the iec 60815-2 pdf provides the decision matrix, not just a single number.

You can purchase the official IEC 60815-2:2008 PDF from:

Typical cost: ~250–350 CHF (approx. $280–400 USD).

IEC 60815-2 is a technical specification titled "Selection and dimensioning of high-voltage insulators intended for use in polluted conditions – Part 2: Ceramic and glass insulators for a.c. systems". It provides detailed guidance on choosing and sizing porcelain and glass insulators based on the specific pollution levels of their operating environment. Scope and Application

Applicability: Only for outdoor installations using ceramic or glass insulators in AC systems.

Purpose: To translate Site Pollution Severity (SPS) into concrete requirements for insulator profile and creepage distance. iec 60815-2 pdf

Relationship: It complements IEC TS 60815-1, which provides the general principles and overall structure for the entire 60815 series. Key Technical Concepts

RUSCD (Reference Unified Specific Creepage Distance): The baseline creepage distance determined directly from the Site Pollution Severity (SPS) class.

USCD (Unified Specific Creepage Distance): The final required creepage distance calculated after applying correction factors to the RUSCD.

Pollution Severity Classes: The standard refers to five classes (from very light to very heavy) to categorize environments like coastal, industrial, or desert areas. Sizing and Correction Factors

The standard provides formulas and adjustment factors to refine the required dimensions based on:

Insulator Diameter: Larger diameters typically require more creepage. Altitude: Corrections for air density at higher elevations.

Shed Profile: Evaluation of different shapes (standard, anti-fog, open, or alternating sheds) for their effectiveness in specific pollution types.

Installation Position: Adjustments for whether an insulator is mounted horizontally or vertically. Standard Evolution Previous Version: Replaced the older IEC/TR 60815 (1986).

Current Revision: A second edition (IEC TS 60815-2:2025) has been released to simplify profile suitability and update correction factors (e.g., for parallel insulators and altitude).

For official use, you can purchase the full document from the IEC Webstore or through authorized distributors like iTeh Standards and CSA Group.

Informative Report: IEC 60815-2 PDF

Introduction

IEC 60815-2 is a standard published by the International Electrotechnical Commission (IEC) that provides guidelines for the selection and testing of surge arresters for use in power systems. The standard is part of the IEC 60815 series, which deals with surge arresters for use in high-voltage power systems. This report provides an informative overview of the IEC 60815-2 PDF. IEC provides ranges mapping ESDD/NSDD to pollution severity

Scope and Purpose

The scope of IEC 60815-2 is to provide recommendations for the selection and testing of surge arresters for use in power systems with nominal voltages above 1 kV. The standard covers the requirements for surge arresters used to protect power system equipment from overvoltages caused by lightning, switching operations, or other disturbances. The purpose of the standard is to ensure that surge arresters are properly selected and tested to provide reliable protection for power system equipment.

Key Contents

The IEC 60815-2 PDF contains the following key sections:

Key Requirements

Some of the key requirements specified in IEC 60815-2 include:

Benefits and Importance

The IEC 60815-2 standard provides several benefits to power system operators and manufacturers of surge arresters, including:

Conclusion

IEC 60815-2 is an important standard for the selection and testing of surge arresters in power systems. The standard provides guidelines and requirements for ensuring the reliable operation of surge arresters and protecting power system equipment from overvoltages. By following the guidelines and requirements specified in IEC 60815-2, power system operators and manufacturers can ensure the safe and efficient operation of their equipment.

You're looking for a write-up on IEC 60815-2 and a downloadable PDF!

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. Thus, the iec 60815-2 pdf provides the decision

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.

However, I can suggest some possible sources:

It is crucial to note that IEC 60815-2 applies strictly to ceramic and glass insulators.

This is the core of the standard. The IEC 60815-2 PDF provides a systematic method to:

The most valuable asset inside the IEC 60815-2 PDF is Table 1 and Figure 1. These correlate the ESDD (Equivalent Salt Deposit Density) and NSDD (Non-Soluble Deposit Density) to a required Specific Creepage Distance (SCD).

For example:

Without this table, you are under-sizing your insulators by 30-40%, guaranteeing a flashover during the first dry fog season.

The standard includes informative annexes showing: