Power transformer fire and environmental risk reduction by using natural esters

Experimental investigation on the suppression characteristics of new natural ester soybean oil transformer fire in room

“…It has become an important alternative to ordinary oil-immersed transformer insulation cooling oil [15]. Researchers have developed oil-immersed transformers using natural ester vegetable oil [16]. Moreover, in recent years, there has been a new demand and development trend for locating transformers indoors in large shopping malls, hospitals, and communities due to the increasing pressure on urban construction land.…”

Fire resistance test of transformers filled with natural ester insulating liquid

“…Compared with the mineral insulating oil, the natural ester insulating oil (NEIO), as a renewable and biodegradable fluid insulating medium [2], can be used as a substitute for the mineral insulating oil [3]. The flash point of the NEIO exceeds 300°C and its ignition point exceeds 330°C [4]. In order to use the transformers filled with NEIO instead of dry‐type transformers for high fire‐resistance applications by making full use of the characteristics of high ignition point of the NEIO [5], it is required to carry out pilot studies on fire‐resistance performance of NEIO transformers so as to eliminate people's worry about the fire‐resistance performance of NEIO transformers [6].…”

Effects of Nanoparticles Materials on Heat Transfer in Electro-Insulating Liquids

“…Recently, however, they are increasingly being used in power transformers [15][16][17][18][19]. This is mainly due to the properties of esters, such as high biodegradability [20][21][22], low toxicity [15,23], and high flash-point and fire-point values [24][25][26][27][28]. These properties allow for the use of esters in places where, previously, they were only used in dry transformers-in densely populated areas, near water reservoirs, or in petrochemical plants or mines [29,30].…”