A system for remote ignition in aluminothermic welding, comprising: - a mold crucible for aluminothermic welding, comprising a lid with at least one slot for placing an ignition powder; the lid further comprising a housing in which an ignition element can be introduced; - a portable power source; - an ignition device, comprising: - a consumable ignition element comprising: - a substrate, - two first conductive tracks separated and placed over the substrate, and - a resistive element, provided with two ends, each end being connected to one of the first conductive tracks, the resistive element capable of being heated, when an electric current passes through it, to an adequate temperature for igniting the ignition powder; - a portable case comprising: - a central body for housing the power source, - an elongation body and - an ignition switch housed in the elongation body comprising: - a push button for activating the power source, the system being characterized in that it further comprises - a reusable intermediate element comprising: - a first body, - a first cable gland located over the first body, said first cable gland designed to house a first end of a two-wire cable connected by a second end to the portable power source, - two second conductive tracks attached to said first body, each second conductive track being adapted to be connected to one of the wires of the cable, and - a fitting element designed to provide a connection with the ignition element, so that each of the second conductive tracks is in contact with its corresponding first conductive track; - the portable case further comprising: - a first indicator adapted to turn on if the power source is available and - a second indicator adapted to turn on if the contact between the first conductive tracks and the second conductive tracks is correct. - a mold crucible for aluminothermic welding, comprising a lid with at least one slot for placing an ignition powder; the lid further comprising a housing in which an ignition element can be introduced; - a portable power source; - an ignition device, comprising: - a consumable ignition element comprising: - a substrate, - two first conductive tracks separated and placed over the substrate, and - a resistive element, provided with two ends, each end being connected to one of the first conductive tracks, the resistive element capable of being heated, when an electric current passes through it, to an adequate temperature for igniting the ignition powder; - a portable case comprising: - a central body for housing the power source, - an elongation body and - an ignition switch housed in the elongation body comprising: - a push button for activating the power source, - a consumable ignition element comprising: - a substrate, - two first conductive tracks separated and placed over the substrate, and - a resistive element, provided with two ends, each end being connected to one of the first conductive tracks, the resistive element capable of being heated, when an electric current passes through it, to an adequate temperature for igniting the ignition powder; - a substrate, - two first conductive tracks separated and placed over the substrate, and - a resistive element, provided with two ends, each end being connected to one of the first conductive tracks, the resistive element capable of being heated, when an electric current passes through it, to an adequate temperature for igniting the ignition powder; - a portable case comprising: - a central body for housing the power source, - an elongation body and - an ignition switch housed in the elongation body comprising: - a push button for activating the power source, - a central body for housing the power source, - an elongation body and - an ignition switch housed in the elongation body comprising: - a push button for activating the power source, - a push button for activating the power source, - a reusable intermediate element comprising: - a first body, - a first cable gland located over the first body, said first cable gland designed to house a first end of a two-wire cable connected by a second end to the portable power source, - two second conductive tracks attached to said first body, each second conductive track being adapted to be connected to one of the wires of the cable, and - a fitting element designed to provide a connection with the ignition element, so that each of the second conductive tracks is in contact with its corresponding first conductive track; - a first body, - a first cable gland located over the first body, said first cable gland designed to house a first end of a two-wire cable connected by a second end to the portable power source, - two second conductive tracks attached to said first body, each second conductive track being adapted to be connected to one of the wires of the cable, and - a fitting element designed to provide a connection with the ignition element, so that each of the second conductive tracks is in contact with its corresponding first conductive track; - the portable case further comprising: - a first indicator adapted to turn on if the power source is available and - a second indicator adapted to turn on if the contact between the first conductive tracks and the second conductive tracks is correct. - a first indicator adapted to turn on if the power source is available and - a second indicator adapted to turn on if the contact between the first conductive tracks and the second conductive tracks is correct.