Combined flexible materials for electrical insulation—Part 1: Definitions and general requirements
1Key Takeaways
Standard Name: Combined Flexible Materials for Electrical Insulation - Part 1: Definitions and General Requirements Standard Number: GB/T 5591.1-2017 Scope: This standard specifies the definitions and general requirements for combined flexible materials used in electrical insulation. It applies to these ma…
2Expert Interpretation
Interpretation of GB/T 5591.1-2017 "Flexible composite materials for electrical insulation Part 1: Definitions and general requirements", covering terminology, naming rules and supply conditions, and analyzing technological evolution and application cases.
National Standard of the People's Republic of China GB/T 5591.1-2017
Flexible composite materials for electrical insulation Part 1: Definitions and general requirements
Standard background and technology evolution analysis
GB/T 5591.1-2017 "Flexible composite materials for electrical insulation Part 1: Definitions and general requirements" is a revised version after GB/T 5591.1-2002, which aims to meet the development needs of electrical insulation technology. This standard adopts the technical content of the International Electrotechnical Commission (IEC) 60626-1:2009 and makes necessary adjustments based on my country's actual situation.
Comparison of standard frameworks
| Version comparison dimensions | Contents of the 2002 edition | Improvements of the 2017 edition |
|---|---|---|
| Normative references | - GB/T 5591.3-2008 - IEC 60674-3-2:1992 | - Updated and added nine reference documents, including GB/T 13542.4-2009, GB/T 13542.6-2006, etc. |
| Table 1 Contents | -Six specific components of film | -Reduce to three, add a new "conform to standards" column. |
| Terms and Definitions | -Unclear classification of some composite materials | -Added terms such as "full width material" and "slit material" to standardize the naming rules. |
Explanation of professional terms and practical application cases
1. Full width material: refers to materials supplied according to production width, such as about 1 meter wide according to order requirements. This material is often used in applications that require large-format insulation treatment.
2. Slit material/tape: Material slit from full-width material. In practical applications, slit material is widely used for insulation packaging of electronic components, such as the insulation layer of transformer coils.
3. Duplex material: Material composed of two layers of insulating material. For example, in high-voltage electrical equipment, duplex material is often used to manufacture double-layer insulation structures to improve insulation performance and durability.
General requirements
- Material can be supplied in sheets cut to length or in rolls.
- All materials delivered at any time, each full sheet or roll should be uniform and consistent, and meet the performance within the product standard range.
- The surface should be uniform and smooth, without defects such as bubbles, pinholes, wrinkles and fundus.
Dimensions and joints
Thickness and thickness deviation shall be in accordance with GB/T 5591.3. The number of joints allowed and the structural details of the roll material shall be agreed upon by the supplier and the buyer.
Supply conditions
Roll materials shall be supplied on cardboard tube cores or other suitable tube cores, preferably with a tube diameter of 55mm, 76mm or 150mm. Sheets shall be supplied in stacks and the packaging shall be ensured to protect the materials from damage during transportation and storage.
Implementation suggestions
In order to better implement GB/T 5591.1-2017, it is recommended that:
- Enterprises should strictly screen raw material suppliers according to the standard to ensure that the materials meet the relevant specifications.
- During the production process, strengthen process control, especially the detection of surface quality and dimensional deviation.
- Establish a complete quality traceability system to quickly locate and solve problems.