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1. swinburne's test is economical since power required to test a large machine is very small (i.e.,)no load input power.
2.The efficiency of the machine can be predicted at any load, since constant losses are known.
3.This method enables us to determine the losses and efficiency without actually loading the machine
Wiki User
∙ 11y ago
Wiki User
∙ 11y agowe can predetemine the efficiency of a dc machines working as a motor or generator
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