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[". 동기계 장비의 실제 전력 소비를 통계로 어떻게 집계적으로 계산할 수 있을까요? 전력실에 단일 전력계만 있으므로 각 단위의 실제 전력 소비량을 어떻게 집계적으로 계算中止

2017-08-28View Original

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本人在化工企业。因为配电间只有若干个总电表,我想统计计算一下各单元实际用电量,怎么统计?额定功率计算的话肯定不准,实际运行功率打不到额定功率。比如我一个额定功率110kw的外加变频器的离心泵电机的运行实际功率。是用运行时的实测电流乘以电压380吗?那样和额定功率相差很多。完了测量运行电流时,钳形电流表怎么测能测出来实际电流?麻烦各位不吝赐教。
Reply #22017-08-28
三相交流电机三角形和星形两种接法。 钳表测的是线电流; 星形:线电压=380,相电压=线电压/SQRT(3),线电流=相电流; 三角形:线电压=相电压=380,线电流=SQRT(3)*相电流; 三相对称负载有功功率P=3*相电压*相电流=SQRT(3)*线电压*线电流,然后乘以时间t就接近电能表上的数字。 你少了根号(3)。 回去复*电工课,理工科应该都学过。
Reply #32017-08-28
√3 *U*I*cosφ
Reply #42017-09-04
变电所有补偿柜还用乘以根号三吗?
Reply #52017-09-04
变电所有补偿柜还用乘以根号三吗?
Reply #62017-09-04
变电所有补偿柜还用乘以根号三吗?

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