Protection device for a power plant to prevent overloading in th

Details Protection device for a power plant to prevent overloading in th Protection device for a power plant to prevent overloading in th

1975-03-12

1976-08-24

Miller, J D

317 47, H02H 706

Patent

active

039769178

ABSTRACT:
An overload protection device for a turboset including an alternating current generator, a turbine for the drive thereof, and a network supplied from the generator when disconnecting any short circuit within the network comprises a memory connected to the generator for storing a voltage vector corresponding to positive sequence components obtained therefrom prior to the occurrence of a fault in the network, a comparison circuit connected to the memory and to the generator for comparison of of the stored voltage vector with a voltage vector corresponding to positive sequence components obtained from the generator following occurrence of the fault to generate a difference value, and a switch interconnected between the network and the generator for being released upon the difference value exceeding a predetermined value.

REFERENCES:
patent: 2953722 (1960-09-01), Willis
patent: 3405320 (1968-10-01), Schwanenflugel
patent: 3546533 (1970-12-01), Lydick
patent: 3622208 (1971-11-01), Krugler

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