GB/T 27750-2011
ActiveClassification of insulating liquids
绝缘液体的分类
Catalogue
前言 → 1 范围 → 2 规范性引用文件 → 3 ISO分类系统 → 4 绝缘液体的分类 → 5 概略图 → 参考文献 Foreword → 1 Scope → 2 Normative References → 3 ISO Classification System → 4 Classification of Insulating Liquids → 5 Schematic Diagram → Bibliography
Scope
This standard specifies the detailed classification of products belonging to class L (lubricants, industrial oils and related products) group N (insulating liquids) according to ISO 8681:1986 and GB/T 7631.1—2008. The types of products covered include those derived from petroleum refining, synthetic chemical products, synthetic esters, and natural esters. This standard is applicable to group N (insulating liquid) products.
本标准规定了依据ISO 8681：1986和GB/T 7631.1—2008归属于L类(润滑剂、工业用油和相关产品)N组(绝缘液体)的产品的详细分类，所涉及的产品种类包括由石油精炼衍生的产品、合成化学产品及合成酯、天然酯。本标准适用于N组(绝缘液体)产品。
Normative References
Keywords
Application Summary AI generated
Manufacturers and users of insulating liquids use this standard to uniformly classify and code insulating liquids. It helps select the appropriate insulating liquid for specific electrical equipment such as transformers and capacitors, ensuring product performance and safety. By adopting the international standard IEC 61039 identically, this standard facilitates international trade and technical exchange.
绝缘液体生产商和用户使用本标准对绝缘液体进行统一分类和编码。它帮助选择适合特定电气设备（如变压器、电容器）的绝缘液体，确保产品性能和安全。该标准通过与国际标准IEC 61039等同采用，促进了国际贸易和技术交流。
AI Summary AI generated
This standard, identical to IEC 61039:2008, specifies the classification method for insulating liquids. The classification is based on ISO 8681:1986 and GB/T 7631.1—2008, assigning products to class L, group N. The classification code consists of a class letter, a four-letter variety (indicating group, application area, additive presence, and fire point), and a seven-digit identification number (covering IEC standard reference, net calorific value, lowest cold start temperature, and biodegradability). It applies to petroleum-based, synthetic, and natural ester insulating liquids.
本标准等同采用IEC 61039:2008，规定了绝缘液体的分类方法。分类基于ISO 8681:1986和GB/T 7631.1—2008，将产品归入L类N组。分类代码由类别字母、四个字母的品种（表示组别、应用领域、添加剂和燃点）以及七位数字识别码（涉及IEC标准、低热值、最低冷起动温度和生物降解性）组成。适用于石油基、合成及天然酯类绝缘液体。
Key Sentences extracted from text
本标准规定了依据ISO 8681：1986和GB/T 7631.1—2008归属于L类(润滑剂、工业用油和相关产品)N组(绝缘液体)的产品的详细分类，所涉及的产品种类包括由石油精炼衍生的产品、合成化学产品及合成酯、天然酯。
ISO 8681：1986列出了适用于石油产品、润滑剂及相关产品的分类系统的主要原则。
品种按一组4个字母予以识别，具体含义如下：第一个字母，识别绝缘液体的组别，为N：电气绝缘(表1，GB/T 7631.1—2008)。
为了完善命名，添加了7个数字，具体含义如下：前三个数字对应于IEC相关标准顺序号的后三个数字，若无IEC相关标准，则用数字000代替。
第七个数字依据OECD 301：1992方法c或F识别绝缘液体的可生物降解性，含义如下：——0液体不可生物降解(分解的ThOD≤20％)；——1液体可轻微生物降解(40％≥分解的ThOD>20％)；——2液体可较好地生物降解(70％≥分解的ThOD>40％)；——3液体可完全生物降解(分解的ThOD>70％)。
This standard specifies the detailed classification of products belonging to class L (lubricants, industrial oils and related products) group N (insulating liquids) according to ISO 8681:1986 and GB/T 7631.1—2008. The types of products covered include those derived from petroleum refining, synthetic chemical products, synthetic esters, and natural esters.
ISO 8681:1986 lists the main principles of the classification system applicable to petroleum products, lubricants and related products.
The variety is identified by a group of 4 letters, with the following meanings: the first letter identifies the group of insulating liquids, being N: electrical insulation (Table 1, GB/T 7631.1—2008).
To complete the designation, 7 digits are added, with the following meanings: the first three digits correspond to the last three digits of the relevant IEC standard serial number; if there is no relevant IEC standard, the digits 000 are used instead.
The seventh digit identifies the biodegradability of the insulating liquid according to OECD 301:1992 method C or F, with the following meanings: —0 liquid not biodegradable (degraded ThOD ≤20%); —1 liquid slightly biodegradable (40% ≥ degraded ThOD >20%); —2 liquid fairly biodegradable (70% ≥ degraded ThOD >40%); —3 liquid completely biodegradable (degraded ThOD >70%).