變壓器用壓力釋放閥執行行業(yè)標準 JB/T7065-2015 該壓力釋放閥適用于變壓器、電力電容器、有載開(kāi)關(guān)、壓力容器罐等,用來(lái)保護油箱和容器罐。 一, 如何選用壓力釋放閥？how to Selected pressure release valve ? a 、噴油口徑的選用 Selection of Spray oil -caliber : 油箱內油量(Oil mass of oil box)： ＜ 1.5T 1.5T～4.5T 4.5T ～11.5T 11.5T ～ 23T 閥口徑(Effective -caliber of valve)： ∮25 ∮50 ∮80 ∮130 如果油量過(guò) 23T 可按下式選擇：If the oil can be pressed more than 23T Selection ∮130 口徑壓力釋放閥的數量 = 總油量重量 T / 23T ∮130 caliber pressure release valve number = total weight of oil T / 23T b 、壓力釋放閥開(kāi)啟壓力的選擇 Pressure release valve opening pressure of the choice： 開(kāi)啟壓力等級的選擇決定于關(guān)閉壓力的大小,關(guān)閉壓力 PG 按下式計算： The choice of opening pressure level determined by the size of the pressure off, close the pressure of PG determined by the formula: PG = PH + PK + PQ 其中 Among them ： PH = 壓力釋放閥承受靜壓值 Pressure release valve to withstand static pressure values ( V×H ) KPa V 是指變壓器油柱壓 Refers to the transformer oil column pressure 8．9 KPa / m H 是指高油面至閥座底面的距離 Refers to the maximum of oil to the distance from the bottom seat(m) PK 是附加的裕度壓力,一般取 Is an additional margin of safety, the general public to take 5 ～ 7 KPa PQ 是附加的強油、風(fēng)冷裕度壓力,一般取 There is an additional strong oil, air-cooled margin, the general public to take 5 ～ 7 KPa 求得關(guān)閉壓力 PG 后 , 通過(guò)下表（基本技術(shù)參數）可知道開(kāi)啟壓力值。 PG obtained after the closure of the pressure, by the following table (basic technical parameters) can be aware of the value of opening pressure
