Abstract: Fault detection system (800) for a medium voltage circuit comprising assemblies of an electric power distribution cable (205), a first transformation center (210) comprising a first transformer and a first grounding conductor (603), a first grounding system comprising a first grounding resistor (RPAT1) connected to the first transformer through the first grounding conductor (603), the first transformation center (210) connected to a first end of the cable (205) and a second transformation center (220) comprising a second transformer and a second grounding conductor (603), a second grounding system comprising a second grounding resistor (RPAT2) connected to the second transformer through the second grounding conductor (603), the second transformation center (220) connected to a second end of the cable (205).

Abstract: Procedure for measuring the impedance of a grounding system that comprises a loop, the procedure comprises for each frequency fi of a set of frequencies F of a frequency sweep applied to the loop of the grounding system, generating a modulating signal Ssignal (2) with a fixed frequency fm, generating a carrier signal Scarrier (1) with the frequency fi, and obtaining an amplitude modulated signal Smodulated (3) with frequency components of the frequencies fm and fi and based on Ssignal (2) and Scarrier (1).

Abstract: Fault detection system (800) for a medium voltage circuit comprising assemblies of an electric power distribution cable (205), a first transformation center (210) comprising a first transformer and a first grounding conductor (603), a first grounding system comprising a first grounding resistor (RPAT1) connected to the first transformer through the first grounding conductor (603), the first transformation center (210) connected to a first end of the cable (205) and a second transformation center (220) comprising a second transformer and a second grounding conductor (603), a second grounding system comprising a second grounding resistor (RPAT2) connected to the second transformer through the second grounding conductor (603), the second transformation center (220) connected to a second end of the cable (205).

Abstract: The present invention relates to an ignition device for exothermic welding comprising an electrically conductive metal bushing (1) that can house a pellet of a first welding material (4) in electrical contact with the inner wall of an inner chamber (1c) of the bushing (1), provided with an electrically insulating cap (2) and a bottom base (1b) with an opening (1d) through which the first welding material (4) falls in an incandescent state onto a second welding material (4a) arranged in a weld mold (7) when an exothermic reaction has been triggered in the first welding material (4); an electrode (5) that goes through the cap (2) of the metal bushing (1) and comprises a top contact (5a) connectable to a power output (24) of a voltage generator and a bottom contact in the form of a filament (5b) that can be in electrical contact with the pellet of the first welding material (4), the filament (5b) being made of a material having a melting temperature greater than the ignition temperature of the welding material (

Abstract: The present invention relates to an ignition device for exothermic welding comprising an electrically conductive metal bushing (1) that can house a pellet of a first welding material (4) in electrical contact with the inner wall of an inner chamber (1c) of the bushing (1), provided with an electrically insulating cap (2) and a bottom base (1b) with an opening (1d) through which the first welding material (4) falls in an incandescent state onto a second welding material (4a) arranged in a weld mold (7) when an exothermic reaction has been triggered in the first welding material (4); an electrode (5) that goes through the cap (2) of the metal bushing (1) and comprises a top contact (5a) connectable to a power output (24) of a voltage generator and a bottom contact in the form of a filament (5b) that can be in electrical contact with the pellet of the first welding material (4), the filament (5b) being made of a material having a melting temperature greater than the ignition temperature of the welding material (