Protective relay apparatus

Details Protective relay apparatus Protective relay apparatus

H - Electricity

02

H

348/22

H02H 3/30 (2006.01) H02H 7/26 (2006.01)

Patent

CA 1198201

17 ABSTRACT OF THE DISCLOSURE A protective relay system for providing pilot protection for two and three terminal alternating current transmission lines, which system does not require a con- tinuous metallic circuit between the relaying points. The evaluation circuit develops operating and restraining quantities, modified by a predetermined constant which determines the operating characteristic of the relay system.

418887

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