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Application filed by ミドリ電子株式会社filedCriticalミドリ電子株式会社
Priority to JP11866387UpriorityCriticalpatent/JPH0641175Y2/ja
Publication of JPS6423671UpublicationCriticalpatent/JPS6423671U/ja
Application grantedgrantedCritical
Publication of JPH0641175Y2publicationCriticalpatent/JPH0641175Y2/ja
Ground fault detecting apparatus and method for detecting ground fault of field circuit and exciting circuit by detecting ground fault current flowing from ground to neutral pointof exciting circuit