An electrical apparatus (200, 500) associable with a safety device, said safety device being suitable to be closed/opened to connect/disconnect, an electrical circuit to/from a power network, respectively, the electrical apparatus comprising: - a reset device connectable to the power network for the automatic closure of the safety device, - a control device supplied by said power network by means of the reset device and connected to said electrical circuit to detect an operative state thereof and control the reset device, the reset device comprising: sectioning means that can be activated during a manual opening of the safety device to be switched from a closed to an opened configuration, in which an inner equipment of the reset device and the control device are disconnected from the power network, an enclosure and an insulating cover coupled with the enclosure such as to be manually moved relative to the enclosure by sliding between a first position and a second position, a rotating body and a rotating bar including a longitudinal channel in which a first drive lever of the safety device can be inserted so that the first drive lever is integral in the rotation with the bar, automatic actuating means coupled to the bar for rotating the bar to cause the safety device to switch from a opened state and a closed state; the insulating cover comprises: a door which allows access to the rotating bar in order to manually rotate the bar and bring the safety device from the opened to the closed state, when the insulating cover is in the first position, a projection to be inserted in a slot of the rotating body, when the insulating cover is caused to slide from the first to the second position, to inhibit the rotation of the bar in the opposite direction, said projection being disengaged from the slot when the insulating cover is caused to slide from the second to the first position, so that the rotating bar can be rotated by the automatic actuating means to close the safety device, wherein, the insulating cover is provided with a through hole for a padlock to be applied in the second position, such that unauthorized users are prevented from causing the insulating cover to slide to the first position. - a reset device connectable to the power network for the automatic closure of the safety device, - a control device supplied by said power network by means of the reset device and connected to said electrical circuit to detect an operative state thereof and control the reset device, sectioning means that can be activated during a manual opening of the safety device to be switched from a closed to an opened configuration, in which an inner equipment of the reset device and the control device are disconnected from the power network, an enclosure and an insulating cover coupled with the enclosure such as to be manually moved relative to the enclosure by sliding between a first position and a second position, a rotating body and a rotating bar including a longitudinal channel in which a first drive lever of the safety device can be inserted so that the first drive lever is integral in the rotation with the bar, automatic actuating means coupled to the bar for rotating the bar to cause the safety device to switch from a opened state and a closed state; the insulating cover comprises: a door which allows access to the rotating bar in order to manually rotate the bar and bring the safety device from the opened to the closed state, when the insulating cover is in the first position, a projection to be inserted in a slot of the rotating body, when the insulating cover is caused to slide from the first to the second position, to inhibit the rotation of the bar in the opposite direction, said projection being disengaged from the slot when the insulating cover is caused to slide from the second to the first position, so that the rotating bar can be rotated by the automatic actuating means to close the safety device, a door which allows access to the rotating bar in order to manually rotate the bar and bring the safety device from the opened to the closed state, when the insulating cover is in the first position, a projection to be inserted in a slot of the rotating body, when the insulating cover is caused to slide from the first to the second position, to inhibit the rotation of the bar in the opposite direction, said projection being disengaged from the slot when the insulating cover is caused to slide from the second to the first position, so that the rotating bar can be rotated by the automatic actuating means to close the safety device, wherein, the insulating cover is provided with a through hole for a padlock to be applied in the second position, such that unauthorized users are prevented from causing the insulating cover to slide to the first position.