GB/Z 21214-2007Polyester film for fly back transformer (English PDF)
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Issued by
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, China National Standardization Administration
Level / Type
National · Recommended
Issue date
December 3, 2007
Implementation date
May 20, 2008
Scope
GB/Z 21214-2007 (Polyester film for fly back transformer) is available as an English-translated PDF.
GB/Z 21214-2007 — This guidance document specifies the requirements, test methods, inspection rules, marking, packaging, and transportation of polyester film for output transformers.
And storage. This guidance document applies to films made from polyethylene terephthalate through cast slab and biaxially oriented stretching. Line output transformer manufacturing industry.
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Document preview — GB/Z 21214-2007
National Standard of the People's Republic of China
- ICS
- 29.035.99
- Classification
- K 15
Issued by: General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, China National Standardization Administration
Contents
- Foreword
- 1 Scope
- 2 Normative references
- 3 Requirements
- 3.1 Appearance
- 3.2 Film roll, die
- 3.3 Size
Foreword
This guidance document refers to the Japanese Toray S10 polyester film standard and GB 12802.2-2004 "electrical insulation film Part 2. Polyester film for electrical insulation.
This guidance technical document was proposed by the China Electrical Equipment Industry Association.
This guidance document is under the jurisdiction of the National Technical Committee for Standardization of Insulation Materials (SAC/TC51).
This guiding technical document was drafted by. Oriental Insulation Materials Co., Ltd.
1 Scope
This guidance document specifies the requirements, test methods, inspection rules, marking, packaging, and transportation of polyester film for output transformers.
And storage.
This guidance document applies to films made from polyethylene terephthalate through cast slab and biaxially oriented stretching.
Line output transformer manufacturing industry.
2 Normative references
The terms of the following documents are incorporated into the terms of this guidance document by reference to this guidance. Any dated Reference documents, all subsequent amendments (not including errata content) or revisions do not apply to this guidance technical document, however, drums the parties that have reached an agreement under this guidance document will investigate whether the latest versions of these documents are available. Any undated reference the latest version of the document applies to this guidance document.
GB/T 13541-1992 Test method for plastic film for electrical (neqIEC 60674-2.1988) GB/T 13542-1992 General requirements for plastic films for electrical purposes (neq IEC 60674-1. 1980) ANSI/UL94-2001 Combustibility Test for Plastics for Equipment Parts IEC 61074:1999 Determination of melting heat, melting point, crystallization heat and crystallization temperature of electrical insulating materials by differential scanning calorimetry method
3 Requirements
3.1 Appearance
The film is supplied in rolls or in a disk, and the surface of the film is smooth and smooth, free from defects such as wrinkles, tears, particles, bubbles, pinholes and foreign matter.
The edges should be neat and undamaged. When cut into discs, the end faces are neat, the hand feels smooth, no curling, no burrs.
3.2 Film roll, die
Film rolls and dies shall comply with the provisions of 4.2 and 4.4 of GB/T 13542-1992.
3.3 Size
3.3.1 Thickness range and tolerance
The thickness is determined by negotiation between the supplier and the buyer. The recommended nominal thickness is recommended. 75 µm, 100 µm. The thickness tolerance is ± 3% of the nominal thickness.
3.3.2 Number of joints and length of the shortest section
The number of joints per roll is 0, and the shortest length is determined by negotiation between the supplier and the buyer.
3.3.3 Winding diameter, width and limit deviation
The specifications of the roll diameter and width are determined by negotiation between the supplier and the buyer. Recommended width is 26.5mm, 28mm, 32mm, 34mm, 36mm, 38mm, 40mm. The film is processed into a reel according to user requirements. The limit deviation of the winding diameter and width shall comply with the requirements of Table 1.
Table 1 The limit deviation of film winding diameter and width is in millimeters
Width winding diameter limit deviation Width film roll end face film height 15~50 >=180 ±0.2
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 5 pages — is available in the English PDF.
Referenced standards
Normative references
GB/T 13541-1992 · IEC 60674 · IEC 61074
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