IEC 60695-10-2 Fire Hazard Test - Part 10-2: Abnormal Heat - Ball Pressure Test Method

The IEC 60695-10-2 standard published by the International Electrotechnical Commission (IEC) describes the ball pressure test method as a test method to evaluate the softening temperature and accelerated material flow under load in the abnormal heat resistance abilities of polymeric materials and parts of finished products. This test method is applied to materials used in electrotechnical equipment, subassemblies and components, and to solid electrical insulating materials other than ceramics. The ball pressure test method is not suitable for certain elastomers, foamed materials, and other materials that tend to be soft at room temperature. It is generally recommended to use other test methods for such materials, such as IEC 60695-10-3.

The main changes made in the last update of this standard are:

• By adding an introduction, the user is introduced to the basic guide documents published by TC 89.
• In the scope, reference is made to IEC Guide 104 and ISO/IEC Guide 51.
•  New additional terms and definitions have been added.
• Added new requirements for test sample support to improve repeatability.
• The heating furnace requirements have been clarified to increase repeatability.
• Added minimum resolution specification compatible with method requirements for optical measuring instrument.
• New test procedures have been added that include end product proof testing (Method A) and material performance testing (Method B) methods.
• This standard has been updated to be consistent with other parts of the standard.

The risk of abnormal heat and the potential hazards associated with abnormal heat should be considered in the design of any electrotechnical product. In this context, the purpose of component, circuit and product design, as well as material selection, is to reduce potential risks to acceptable levels during normal operating conditions, reasonably foreseeable abnormal use, failure and failure.

The main goal of the IEC 60695-1-10 standard is to provide guidance on how to:

• Preventing ignition caused by an electrically powered component part
• Occurs in case of ignitioncontainment of any fire within the enclosure limits of the electrotechnical product.

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