Which fire extinguishing equipment is better for oil-immersed transformers?

Large indoor oil-immersed transformers are equipped with fire protection systems in accordance with regulatory requirements. Fire extinguishing systems such as gas fire extinguishing, oil discharge and nitrogen filling, water spray, and high-pressure water mist are often used.

Fire extinguishing by draining oil and filling with nitrogen starts from inside the transformer, so the fire extinguishing speed is fast and the loss is small. However, if the transformer explodes instantaneously, a large amount of burning insulating oil will splash around, causing the flow fire to spread. At the same time, most of the burning insulating oil will flow into the oil collection pit and cause a large fire in the oil collection pit. The oil discharge and nitrogen injection fire extinguishing system cannot extinguish fires outside the transformer, oil collection pits, fuel splash fires, and flowing fires. In terms of fire extinguishing mechanism, gas fire extinguishing media mainly include cooling, suffocation and chemical suppression. It has the advantages of high electrical insulation, high fire extinguishing efficiency, no pollution to equipment, and rapid fire extinguishing. It is often used in two forms: total flooding and partial application. However, the gas fire extinguishing system is limited by the number of protected areas, the protection radius corresponding to the gas transmission distance, new safety hazards caused by storing multiple pressure vessels in the building, higher investment costs and other factors. In the indoor oil-immersed transformer fire protection Gas fire extinguishing systems are used less frequently. Water spray and high-pressure water mist fire extinguishing systems are currently the main fire extinguishing systems used for fire protection of oil-immersed transformers.

The mist droplets ejected by the water spray fire extinguishing system are sprayed towards the protected object. The mist droplets evaporate quickly after being heated, cooling, suffocating, diluting, impacting, emulsifying and covering the surface of the protected object. However, water consumption is large, and due to the large particle size of water droplets, there are safety hazards when fighting electrical fires. Moreover, the water supply equipment and pipe network are huge, and the accident oil pool is large, which increases the difficulty and cycle of construction.

However, the high-pressure water mist fire extinguishing system has a small fire extinguishing mist droplet size, and there will be no safety hazards in extinguishing electrical fires. At the same time, the fire suppression effect is better and the water consumption is smaller. Compared with oil discharge and nitrogen injection, gas fire extinguishing, water spray and other fire extinguishing systems, they all have advantages, and in special environments such as indoor main transformer rooms, they have great potential use value, which can be explored and utilized to provide better services. Power Industry.

Oil-immersed transformers, oil-immersed transformers manufacturers, oil-immersed transformer manufacturers, ready-made, welcome new and old customers to call to purchase oil-immersed transformers. Transformer manufacturer’s phone number Whatsapp/Wechat: +86 15824687445
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