SIST EN 60893-3-7:2004/A1:2010

SIST EN 60893-3-7:2004/A1:2010 is the Slovenian adoption of a European amendment to the standard for industrial rigid laminated sheets based on thermosetting resins for electrical purposes. It updates the requirements for rigid laminated sheets based on polyimide resins and is used by manufacturers, test laboratories, and specifiers of electrical insulating materials.

What does SIST EN 60893-3-7:2004/A1:2010 specify?

SIST EN 60893-3-7:2004/A1:2010 specifies updated property requirements for rigid laminated sheets based on polyimide resins. It is an amendment to EN 60893-3-7:2004, and the amendment text focuses on the requirements table that links properties to test methods.

The document is organized as a short amendment with a foreword, an introduction, and a replacement for Table 5. Table 5 is the main technical content and ties each property to an IEC 60893-2 test clause.

What are the key requirements of SIST EN 60893-3-7:2004/A1:2010?

The amendment updates the acceptance criteria for the main performance properties of polyimide rigid laminates. In practice, a supplier, purchaser, or test lab uses these criteria to check whether a sheet type matches the specified electrical, mechanical, and flammability performance.

Mechanical performance

SIST EN 60893-3-7:2004/A1:2010 keeps flexural strength as a key requirement, with the test done under room-temperature conditions and after heat conditioning. It also covers CHARPY impact strength or IZOD impact strength parallel to laminations.

For the impact requirement, conformance with either the CHARPY test or the IZOD test is acceptable for this part of the specification. That matters because a laboratory can use the method available in its setup and still demonstrate compliance for the impact property.

Electrical performance

SIST EN 60893-3-7:2004/A1:2010 specifies electric strength in oil perpendicular to laminations and breakdown voltage in oil parallel to laminations. It also requires insulation resistance after immersion in water.

These electrical checks matter because they show how the laminate behaves when it is stressed in an electrical environment and after moisture exposure. For buyers and engineers, they help separate a general plastic sheet from a material suitable for electrical insulation duty.

Thermal, moisture and fire-related behavior

SIST EN 60893-3-7:2004/A1:2010 includes a flammability category of HB from a small-scale laboratory test. The introduction notes that this test is mainly for monitoring production consistency and should not be treated as a full indicator of fire hazard in real use.

The table also covers water absorption. That matters because absorbed moisture can affect electrical insulation performance and dimensional stability, so it is a useful control property for incoming inspection and qualification.

Test method references

SIST EN 60893-3-7:2004/A1:2010 points to IEC 60893-2 for the test methods used in Table 5, with subclauses covering flexural strength, impact strength, electrical strength, breakdown voltage, insulation resistance, flammability, and water absorption. In practice, the standard tells the user not only what to measure, but also which method family to use.

What terms does SIST EN 60893-3-7:2004/A1:2010 define?

• Rigid laminated sheets - Layered insulating sheets made for electrical use, with the laminate structure giving the material its mechanical and electrical properties.
• Polyimide resins - The resin family used for the sheets covered by this part of the series.
• CHARPY impact strength - An impact test property used here as one accepted way to show resistance to sudden mechanical loading.
• IZOD impact strength - An alternative impact test property used for the same purpose as CHARPY in this specification.
• HB - The flammability category assigned by the small-scale laboratory test in this amendment.
• Insulation resistance - The resistance to electrical leakage after water immersion, used here as a moisture-sensitive electrical property.

Who uses SIST EN 60893-3-7:2004/A1:2010?

SIST EN 60893-3-7:2004/A1:2010 is used by manufacturers of electrical insulating laminates, test laboratories, electrical equipment suppliers, and buyers who specify sheet materials for insulating applications. Quality managers use it to define acceptance tests, and engineers use it when selecting materials for design and procurement.

What changed in SIST EN 60893-3-7:2004/A1:2010 from the previous edition?

SIST EN 60893-3-7:2004/A1:2010 is Amendment 1 to EN 60893-3-7:2004. The introduction states that it revises the limits for CHARPY and IZOD impact strengths for all types of rigid laminated sheets based on polyimide resins, based on round-robin testing.

Which standards are used with SIST EN 60893-3-7:2004/A1:2010?

SIST EN 60893-3-7:2004/A1:2010 uses IEC 60893-2 for the test methods named in Table 5. The title also identifies the IEC source document IEC 60893-3-7:2003/A1:2009 as the basis for this amendment.

What does the SIST EN 60893-3-7:2004/A1:2010 document contain?

The document contains the amendment text, a foreword, an introduction, and a replacement Table 5. Table 5 gives the property requirements and the linked test clauses for flexural strength, CHARPY or IZOD impact strength, electric strength in oil, breakdown voltage in oil, insulation resistance after water immersion, flammability category, and water absorption.

It is a practical specification document rather than a design guide. The main task it supports is material qualification and acceptance testing for rigid laminated sheets based on polyimide resins.