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Hitachi Ltd
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Hitachi Ltd
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Publication date
Application filed by Hitachi LtdfiledCriticalHitachi Ltd
Priority to JP11856576ApriorityCriticalpatent/JPS5344817A/en
Publication of JPS5344817ApublicationCriticalpatent/JPS5344817A/en
PURPOSE: To permit the test to be carried out without operating any generator by connecting a circuit, the voltage from which varies according to a field current on-off signal, in lieu of an AC generator and feeding back the output of the circuit.