SIST EN 60893-3-6:2004/A1:2010

Overview

SIST EN 60893-3-6:2004/A1:2010 is a European Standard developed by the European Committee for Electrotechnical Standardization (CENELEC) that specifies the requirements for industrial rigid laminated sheets based on silicone resins for electrical insulation purposes. These rigid laminated sheets are thermosetting resin-based materials designed mainly for use in electrical and electrotechnical applications where robust insulating properties are essential.

This amendment modifies the original 2004 edition by introducing revised limits for impact strength testing, offering improved reliability and consistency based on extensive interlaboratory testing results. The standard ensures that silicone resin-based laminated sheets meet stringent physical, electrical, and fire safety criteria, supporting the production and application of high-performance insulating materials.

Key Topics

• Material Specifications: Defines the characteristics of rigid laminated sheets made from silicone-based thermosetting resins.
• Mechanical Properties: Sets minimum strength values including flexural strength and impact resistance (Charpy and Izod impact tests) to ensure durability.
• Electrical Properties: Includes requirements for electric strength, dielectric breakdown voltage, permittivity, and dissipation factors under specified conditions.
• Water Absorption: Limits to control moisture intake, maintaining material performance and longevity.
• Flammability Rating: Specifies test procedures and categorizations to monitor fire resistance during production, emphasizing the standard’s scope is limited to consistency rather than overall fire hazard assessment.
• Testing Methods: References IEC 60893-2 for detailed testing methodologies, with specific adaptations for silicone-resin laminates.
• Revised Limits Based on Round-Robin Testing: Amendment A1 introduces updated impact strength limits to reflect improved testing accuracy and material consistency.

Applications

Rigid laminated sheets based on silicone resins conforming to SIST EN 60893-3-6:2004/A1:2010 are primarily used in electrical and electronic equipment where high insulating performance is needed under demanding environmental conditions. Applications include:

• Electrical Insulation Components: Such as barriers, supports, and housings within transformers, switchgear, and circuit breakers.
• Electrical Machines: Insulation parts in motors, generators, and control devices.
• High-Temperature Environments: Materials withstand temperature-induced stress, maintaining electrical integrity.
• Industrial Electronics: Circuit boards and insulating substrates requiring enhanced mechanical strength and electrical resistance.
• Safety-Critical Devices: Components requiring stable fire-retardant properties during operation.

The standard supports manufacturers and engineers in selecting silicone-based laminated sheets that guarantee safety, durability, and performance consistency necessary in modern electrotechnical installations.

Related Standards

• IEC 60893-2: Covers testing methods for industrial laminated sheets, including mechanical, electrical, and physical property assessment.
• EN 60893-3-1 to EN 60893-3-5: Other parts of the EN 60893 series specifying requirements for laminated sheets based on different resin types (e.g., epoxy, phenolic).
• IEC 60335, IEC 61189: Standards related to materials used in electrical insulation and printed circuit boards.
• ISO/IEC 17025: Guidelines for laboratories performing testing described in the standard to ensure reliable and accurate test results.

Summary

SIST EN 60893-3-6:2004/A1:2010 is a vital standard defining requirements for industrial silicone resin laminated sheets used in electrical insulation. By specifying mechanical strengths, electrical performance, water absorption limits, and flammability classes, it ensures high-quality insulating materials suitable for diverse electrotechnical applications. Compliance with this standard helps manufacturers produce consistent, reliable, and safe insulating products that meet stringent European and international regulatory frameworks.

Keywords: insulating materials, silicone resin laminated sheets, electrical insulation, thermosetting resins, impact strength, electrical properties, flammability, industrial laminated sheets, EN 60893-3-6, CENELEC standard, IEC 60893-3-6 amendment, electrical safety materials.