1.1本规范描述了一种高燃点矿物油基绝缘液，用作新的和现有的配电电气设备（如变压器和开关设备）中的电介质和冷却介质。 1.2高燃点绝缘油不同于传统矿物绝缘油，其燃点至少为300 ° C、 高燃点矿物绝缘油也称为 “ 易燃性较低 ” 矿物绝缘油。为了符合国家电气规范（第450-23条）或其他机构的某些应用要求，该特性是必要的。本规范中讨论的材料可与其他石油基绝缘油混溶。将高燃点液体与低燃点碳氢绝缘油混合（例如，规范D 3487 矿物油）可能导致燃点低于300 ° C 1.3本规范旨在定义一种高燃点电矿物绝缘油，该绝缘油与现有设备的典型结构材料兼容，并在本应用中令人满意地保持其功能特性。本规范中所述材料不得与非石油来源的电绝缘液体混溶。用户应联系高燃点绝缘油的制造商以获取这方面的指导。 1.4本规范仅适用于任何加工前收到的新绝缘材料油。有关在役维护测试的信息，请参阅相应的指南。如果出现有关推荐特性或维护程序的问题，用户应联系设备或油的制造商。

1.1 This specification describes a high fire-point mineral oil based insulating fluid, for use as a dielectric and cooling medium in new and existing power and distribution electrical apparatus, such as transformers and switchgear. 1.2 High fire-point insulating oil differs from conventional mineral insulating oil by possessing a fire-point of at least 300 ° C. High fire-point mineral insulating oils are also referred to as “ less flammable ” mineral insulating oils.This property is necessary in order to comply with certain application requirements of the National Electrical Code (Article 450-23) or other agencies. The material discussed in this specification is miscible with other petroleum based insulating oils. Mixing high fire-point liquids with lower fire point hydrocarbon insulating oils (for example, Specification D 3487 mineral oil) may result in fire points of less than 300 ° C. 1.3 This specification is intended to define a high fire-point electrical mineral insulating oil that is compatible with typical material of construction of existing apparatus and will satisfactorily maintain its functional characteristic in its application in this application. The material described in this specification may not be miscible with electrical insulating liquids of non-petroleum origin. The user should contact the manufacturer of the high fire-point insulating oil for guidance in this respect. 1.4 This specification applies only to new insulating material oil as received prior to any processing. Information on in-service maintenance testing is available in appropriate guides. The user should contact the manufacturers of the equipment or oil if questions of recommended characteristics or maintenance procedures arise.