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vb, taps, tapping or tapped. 1. to strike (something) lightly and usually repeatedly: to tap the table; to tap on the table. 2. (tr) to produce by striking in this way: to tap a rhythm. 3. (tr) to strike lightly with (something): to tap one's finger on the desk.
Tuesday, April 27, 2010. Transformer Tap Changer. A tap changer is a device fitted to power transformers for regulation of the output voltage to required levels. This is normally achieved by changing the ratios of the transformers on the system by altering the number of turns in one winding of the appropriate transformer/s.