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... Graph II: frequency versus time graph for 3 cycles When three phase balanced is imposed on bus three, the effect on frequency is more for 3 cycles as compared to 2 cycles. Therefore, time to clear fault is greater for 3 cycles as compared to 2 cycles as shown in graph I & II above. ...
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Metadyne



A metadyne is a direct current electrical machine with two pairs of brushes. It can be used as an amplifier or rotary transformer. It is similar to a third brush dynamo but has additional regulator or ""variator"" windings. It is also similar to an amplidyne except that the latter has a compensating winding which fully counteracts the effect of the flux produced by the load current. The technical description is ""a cross-field direct current machine designed to utilize armature reaction"". A metadyne can convert a constant-voltage input into a constant-current, variable-voltage output.
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