Applicability Analysis of Dry Burning Test Method for Fire Pipe of Water Spray Fire Extinguishing System for UHV Transformer

The fire of UHV transformer has the characteristics of rapid development, high oil temperature and high fire intensity. Firstly, the applicability of the existing dry burning test method to the fire pipe of the water spray fire extinguishing system under the fire scene of UHV transformer is analyzed. Secondly, five kinds of heating curves, such as hydrocarbon (HC) heating curve, outdoor fire heating curve, slow heating curve, electric fire heating curve, tunnel fire RABT-ZTV heating curve, are compared in the existing codes. Finally, some suggestions are put forward to Improvement requirements of the fire resistance of water spray fire extinguishing system in practical engineering and to improve the current test method.