Abstract: In the field of electrical power systems there is provided a method of supervising the operation of a plurality of current transformers that are arranged in respective current transformer within differing protection zones of a multi-phase electrical power system. The method of supervising comprises the steps of: (a) identifying a faulty protection zone within the electrical power system; (b) identifying a faulty current transformer group within the faulty protection zone; and (c) identifying faulty phase(s) within the faulty current transformer group within the faulty protection zone.

Abstract: A device applied to electric connectors of energy provided with unit of detonation incorporated in a button for detonation of cartridge with powder comprising a device for the installation of pressure electrical connectors on two electrical conductors, the tool has three main components the first is called power unit with a piston, the second is the power unit (2) and the third is a cartridge carrier, the power unit (2) and the shooting unit (9) being coupled through a thread (8) that holds them firmly together, therefore forming only one set, on its interior is the cartridge carrier (14) and the metallic cartridge (12) with gunpowder, properly placed, the shooting unit (9) has on its interior a compound system by pins and springs linked to a shooting button (34) that will cause the detonation of the cartridge (12) with gunpowder by the impact of a detonation needle (57) on this cartridge (12), also a piston (11) on the interior of the power unit (2) will be impelled against one of the components of the elect

Abstract: A device coupler of impact to connect aerial handles of electric energy is disclosed, which is the kind that comprises a set of copier with accessories brace for support and connectors parts setting to be applied into the power system between the electrical cables, the copier is made up by a piston with a breech that also has a cover breech provided with a gunpowder cartridge shot needle to be set in the interior of the breech. The improvements are characterized because there's a breech's cover (13) with a shot inner device powered by a trigger (13a), this breech's cover (13) will be adapted for a quick hitch of the breech (12) set in the posterior end (10a) of the copier (10), the latter has a impact piston (11) provided with a radial handle (15) of retention for the return of the piston back-impact (11); in the copier (10) it's also foreseen a radial window (12a) for the liberation of the explosion's gases.