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我公司是一家化纤企业公司,生产设备工艺及经济方面对供电可靠性要求较高,属二类负荷用电性质。根据可靠性要求,变压器按照暗备用方式设计选型。由于电力变压器的经济负荷率一般为50％左右,因此,理论上1400kVA的最大负荷选取两台1000kVA容量的变压器(即按70％的最大负荷率选取),正常情况下两台变压器同时参加工作,这时每台变压器均承担50％的最大负荷,变压器在正常情况下的最大负荷率为50％/70％≈70％,满足长期经济运行的要求,在故障情况下由于填充系数α<0.75,所以可以过负荷1.4倍,6h承担全部最大负荷
Our company is a chemical fiber enterprise company. The production equipment process and economic aspects have high requirements for power supply reliability and belong to the second class load power characteristics. According to reliability requirements, the transformer is designed according to the dark standby mode. Since the economical load rate of power transformers is generally around 50%, theoretically, the maximum load of 1400kVA is to select two transformers with a capacity of 1000kVA (that is, a maximum load factor of 70%). Under normal circumstances, the two transformers participate in the work at the same time. At this time, each transformer bears a maximum load of 50%. The maximum load factor of the transformer under normal conditions is 50%/70%≈70%, which satisfies the requirements for long-term economic operation. In the event of a fault, the fill factor α<0.75, So it can overload 1.4 times, 6h bear all the maximum load