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phy-transformer
2011-11-26 6:40 am
回答 (1)
2011-11-26 7:23 am
✔ 最佳答案
Turn ratio = 220/12 = 55:3Hence, a step-down transformer of turn ratio 55:3 should be used.
Current in primary = 150/220 A = 0.682 A
收錄日期: 2021-04-20 11:54:01
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20111125000051KK00836