黔南变压器短路试验

黔南变压器短路试验
       短路试验是模拟事故短路，是指黔南变压器一次侧加上额定电压，二次侧由于事故原因，在出线端子上发生的突然短路。在此短路电流的作用下，黔南变压器各部分会产生很大的电动力，使绕组发生畸变或移位崩掉，也产生很大的热量，并使绕组有烧毁的危险。因此，本试验的目的是为了考核黔南变压器的动、热稳定性。即考核绕组、引线、开关、套管和各种紧圈装置的机械强度，及本试验结束时达到的******温度是否超过其导线材料及其外包绝缘耐热等级所能允许的******温度(对铜线为250 ℃，铝线为200 ℃)。由于应力和温升都与短路电流的二次方成正比；因此，容量越大，稳定性越差。
 
Transformer short circuit test
 
    The short circuit test is to simulate the accident short circuit, refers to the primary of the transformer together with the rated voltage, the secondary side due to the cause of the accident, occurred in the outlet terminals sudden short circuit. The role of short-circuit current transformer sections of the great electric power winding distortion or displacement of collapse out great heat, and winding burned. Therefore, the purpose of this test for assessment of the transformer dynamic and thermal stability. Assessment winding mechanical strength of the fuses, switches, casing, and tight ring device and the end of the trial to achieve the maximum temperature is more than the maximum temperature of the wire material and its outsourcing insulation levels can be allowed (for oil immersion copper to 250 ° C, aluminum is 200 ° C). Due to stress and temperature rise is proportional to the short-circuit current of the secondary side; capacity of the greater stability of the worse.