Abstract: In a method for operating an electric arc furnace operated with an alternating voltage, a structure-borne sound signal occurring on a wall of the electric arc furnace is detected, from which structure-borne sound signal a parameter characterizing the flicker properties of the electric arc furnace is calculated. At least one process variable of the electric arc furnace is controlled on the basis of the calculated parameter. An electric arc furnace operated according to the method is used in and for a melting plant.

Abstract: A method for the production of a multi-polar shielded electric interface, particularly a plug-in connection, such as a plug, a socket, a Y-part, a T-part, or the like comprising at least one cable (2) connected thereto with a shielding (1), the interface comprising electric contacts (4) and with the cable (2) with the electric contacts (4) comprising conductors (3) to be connected and a shielding (1) surrounding the conductors (3), to be guided from the cable (2) to the interface, wherein to form a shielding element (6) the shielding (1) of the cable (2) and at least an area adjacent to the shielding (1) around the electric contacts (4) is coated by injection molding with an electrically conductive composite material, with the shielding element (6) being distanced from the electric contacts (4) or an isolating body (5) being embedded. An interface is produced accordingly.

Abstract: In a method for determining a state variable of an electric arc furnace, especially for determining the level of the foamed slag (15) in a furnace, the energy supplied to the furnace is determined with the aid of at least one electric sensor while solid-borne noise is measured in the form of oscillations on the furnace. The state variable is determined by a transfer function which is determined by evaluating the measured oscillations and evaluating measured data of the electric sensor. The state of the foamed slag level can thus be reliably recognized and be monitored over time. The foamed slag level is decisive for the effectiveness with which energy is fed into the furnace. Furthermore, losses caused by radiation are reduced by covering the arc with the foamed slag. The improved measuring method allows the foamed slag level to be automatically controlled or regulated in a reliable manner.

Abstract: In a method for operating an electric arc furnace operated with an alternating voltage, a structure-borne sound signal occurring on a wall of the electric arc furnace is detected, from which structure-borne sound signal a parameter characterizing the flicker properties of the electric arc furnace is calculated. At least one process variable of the electric arc furnace is controlled on the basis of the calculated parameter. An electric arc furnace operated according to the method is used in and for a melting plant.

Abstract: A method for the production of a multi-polar shielded electric interface, particularly a plug-in connection, such as a plug, a socket, a Y-part, a T-part, or the like comprising at least one cable (2) connected thereto with a shielding (1), the interface comprising electric contacts (4) and with the cable (2) with the electric contacts (4) comprising conductors (3) to be connected and a shielding (1) surrounding the conductors (3), to be guided from the cable (2) to the interface, wherein to form a shielding element (6) the shielding (1) of the cable (2) and at least an area adjacent to the shielding (1) around the electric contacts (4) is coated by injection molding with an electrically conductive composite material, with the shielding element (6) being distanced from the electric contacts (4) or an isolating body (5) being embedded. An interface is produced accordingly.

Abstract: In a method for determining a state variable of an electric arc furnace, especially for determining the level of the foamed slag (15) in a furnace, the energy supplied to the furnace is determined with the aid of at least one electric sensor while solid-borne noise is measured in the form of oscillations on the furnace. The state variable is determined by a transfer function which is determined by evaluating the measured oscillations and evaluating measured data of the electric sensor. The state of the foamed slag level can thus be reliably recognized and be monitored over time. The foamed slag level is decisive for the effectiveness with which energy is fed into the furnace. Furthermore, losses caused by radiation are reduced by covering the arc with the foamed slag. The improved measuring method allows the foamed slag level to be automatically controlled or regulated in a reliable manner.

Abstract: In a method for determining a state variable of an electric arc furnace, especially for determining the level of the foamed slag (15) in a furnace, the energy supplied to the furnace is determined with the aid of at least one electric sensor while solid-borne noise is measured in the form of oscillations on the furnace. The state variable is determined by a transfer function which is determined by evaluating the measured oscillations and evaluating measured data of the electric sensor. The state of the foamed slag level can thus be reliably recognized and be monitored over time. The foamed slag level is decisive for the effectiveness with which energy is fed into the furnace. Furthermore, losses caused by radiation are reduced by covering the arc with the foamed slag. The improved measuring method allows the foamed slag level to be automatically controlled or regulated in a reliable manner.

Abstract: In a connector, a first connector element, in particular a plug, and a second connector element, in particular a socket or a housing adapter, have a first or second contact insets around the first contact inset of a plug, and a sleeve-shaped latch segment is arranged from which, running along the longitudinal direction of the connector, resilient latch flanges with latch tabs are formed that are appropriate for locking onto a ring-shaped groove formed on the inner side of the second connector element (locking position). The plug includes an outer sleeve-shaped actuation slid, which can be slid back against the spring force along the longitudinal direction of the connector (unlocking position) and is appropriate for actuating one or more unlocking elements, which can be slid along the longitudinal direction of the connector under a section of the latch flanges and are appropriate for supporting the latch flanges (locking position).

Abstract: In a connector, a first connector element, in particular a plug, and a second connector element, in particular a socket or a housing adapter, have a first or second contact insets around the first contact inset of a plug, and a sleeve-shaped latch segment is arranged from which, running along the longitudinal direction of the connector, resilient latch flanges with latch tabs are formed that are appropriate for locking onto a ring-shaped groove formed on the inner side of the second connector element (locking position). The plug includes an outer sleeve-shaped actuation slid, which can be slid back against the spring force along the longitudinal direction of the connector (unlocking position) and is appropriate for actuating one or more unlocking elements, which can be slid along the longitudinal direction of the connector under a section of the latch flanges and are appropriate for supporting the latch flanges (locking position).

Abstract: A process for controlling a multiple stage drawing machine that implements a direct non-sliding drawing process provides for set-up and production to be automatic and for the variables necessary for process control, especially material speed and applied force, to be derived without establishing contact between the stock material and a sensing device.

Abstract: A process for controlling a multiple stage drawing machine that implements a direct non-sliding drawing process provides for set-up and production to be automatic and for the variables necessary for process control, especially material speed and applied force, to be derived without establishing contact between the stock material and a sensing device.