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Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
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Filing date
Publication date
Application filed by Toshiba Corp, Tokyo Shibaura Electric Co LtdfiledCriticalToshiba Corp
Priority to JP50114457ApriorityCriticalpatent/JPS5238139A/en
Publication of JPS5238139ApublicationCriticalpatent/JPS5238139A/en
PURPOSE: When an internal trouble in a three-terminal power system occurs whereof the failure current overflows, two series of relay devices shall be operated by using a few number of signals.