標準號：IEEE C 57.121-1998
中文標準名稱：變壓器中不易燃碳氫化合物液體的維護和驗收指南
英文標準名稱：Guide for acceptance and maintenance of less flammable hydrocarbon fluid in transformers
標準類型：K41
發布日期：1998/9/16 12:00:00
實施日期：1999/12/31 12:00:00
中國標準分類號：K41
國際標準分類號：13.220.40;29.180
適用范圍：This guide recommends tests1and evaluation procedures, as well as criteria and methods of maintenance,for less flammable hydrocarbon (LFH) transformer insulating fluids. These liquids are also known as highmolecular weight hydrocarbon (HMWH) fluids. HMWH dielectric fluids are hereby defined as those fluidshaving an ASTM D92 fire point of 300 °C or greater, being primarily composed of, but not restricted to,hydrocarbons. These fluids meet the requirements of the National Electrical Code? (NEC?) (NFPA 70-1999),2Article 450-23, as a less flammable dielectric for use in indoor applications when used in properlydesigned and installed transformers. Ester- and silicone-based fluids are not covered by this guide. Methodsof reconditioning LFH fluids are also described. It is not the intent of this guide to address retrofilling transformerswith LFH fluids. Any such substitution of fluids should be performed only after consultation withthe manufacturers of fluid and equipment. Where instructions given by the transformer or fluid manufacturersdiffer from those given in this guide, the manufacturer’s instructions are to be given preference.