Relay protection device with a blocking function for each phase

Details Relay protection device with a blocking function for each phase Relay protection device with a blocking function for each phase

H - Electricity

02

H

317/11

H02H 7/22 (2006.01) H02H 7/26 (2006.01)

Patent

CA 1128984

ABSTRACT OF THE DISCLOSURE: This invention ? to a protection device for electrical components include ? ? electrical power supply networks, such as sections of lines, bus bars, transformers and the like, preferably quick-operating protections of, for example, the type which is based on measuring the extension of transient waves in components in the event of a fault, and which has arrangements for generation of tripping signals and blocking signals, respectively, in dependence on whether the fault lies ahead or behind. The protection device includes a circuit arrangement for dividing blocking signals into phases and for blocking the protection device in each phase against trippings in the event of a fault lying behind. It further comprises a sequence detector consisting of three single phase partial detectors having each one tripping and one blocking input and one tripping and one blocking output, which are arranged in such a way that when a tripping signal occurs on the tripping input, any incoming blocking signals are blocked, whereas when a blocking signal occurs on the blocking input, any incoming tripping signals are blocked.

316824

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