SIST EN 61628-2:2001/A1:2007

Overview

SIST EN 61628-2:2001/A1:2007 is a European standard that specifies the methods of test for corrugated pressboard and presspaper used for electrical purposes. This amendment (A1) updates the original EN 61628-2:1999, incorporating changes aligned with the International Electrotechnical Commission (IEC) standard IEC 61628-2:1998/A1:2007. The standard is published under the authority of CENELEC (European Committee for Electrotechnical Standardization) and offers harmonized test procedures critical to assessing the quality and performance of insulating materials in electrical equipment.

The scope of this standard covers pressboard and presspaper materials that are corrugated for use as insulating components in electrical devices. These tests ensure the materials meet stringent operational and safety requirements, facilitating reliability across electrical applications worldwide.

Key Topics

The standard focuses on precise test methods to evaluate various physical and electrical properties of corrugated insulating materials. Key topics include:

• Thickness Measurement
  Utilizes an external screw-type micrometer with a measurement accuracy of ±0.01 mm to determine the board thickness at specified points on the corrugated surface.

• Moisture Content Determination
  Specifies procedures for conditioning and testing specimens according to IEC 60641-2 to accurately measure moisture levels, critical for maintaining insulation performance and longevity.

• Specimen Preparation and Conditioning
  Details sample sizes and conditioning processes prior to testing to ensure consistency and reproducibility of test results, following the referenced IEC 60641-2 standard.

• Mechanical Testing Procedures
  Includes protocols to measure bending and compression resistance by placing specimens between flat plates and applying defined mass to guarantee contact with surfaces.

• Electrical Property Testing
  Particularly the measurement of conductivity of aqueous extracts to assess the electrical purity and insulating capacity of the materials.

• Normative References
  Strong reliance on IEC 60641-2:2004 as the base publication for test methods, highlighting the integration of international standards to ensure universal applicability.

Applications

SIST EN 61628-2:2001/A1:2007 offers critical value for manufacturers, testers, and users of electrical insulating materials, such as:

• Electrical Equipment Manufacturing
  Pressboard and presspaper are essential in transformers, switchgear, and other electrical components for insulation and mechanical support.

• Quality Assurance Laboratories
  Standardized testing methods ensure materials conform to safety and performance benchmarks before deployment in electrical applications.

• Material Development and Certification
  Enhances product development by providing reproducible test methods that aid in certifying materials for industry compliance.

• Maintenance and Safety Compliance
  Enables periodic testing of insulation materials in electrical systems to predict failures and extend equipment service life.

Using this standard supports consistent product performance, reduces electrical hazards, and aligns with regulatory requirements across European and international markets.

Related Standards

SIST EN 61628-2:2001/A1:2007 closely references and works alongside other relevant standards to provide a comprehensive framework for electrical insulating materials:

• IEC 60641-2:2004 – Pressboard and presspaper for electrical purposes – Part 2: Methods of test
  Forms the foundational basis for testing procedures cited throughout SIST EN 61628-2:2001/A1:2007.

• EN 61628-1 – Corrugated pressboard and presspaper for electrical purposes – Part 1: Specifications (related part covering material specifications).

• Additional IEC and CENELEC documents concerning electrical insulating materials and their test methods, ensuring harmonization across product standards.

By following SIST EN 61628-2:2001/A1:2007, stakeholders in the electrical industry can confidently apply uniform, internationally recognized test methods specifically tailored to corrugated pressboard and presspaper insulating materials, ultimately enhancing electrical safety and reliability.