Abstract: A method for monitoring the operation of an electrical assembly having a plurality of coils disposed electrically in a parallel circuit, includes detecting, off-power, the voltage at each coil by using a tap on a winding, determining the AC component of the detected voltage for each coil, determining the mean value of the voltage at the coils, evaluating the determined AC component for each coil with respect to the determined mean voltage, while applying a weighting, and generating a signal if a weighted deviation of a value describing the AC component of a detected voltage in a coil from a value describing the mean voltage exceeds a specified limiting value. An electrical assembly and a method for operating the assembly are also provided.

Abstract: A compensation block for air-core inductors or transformers is formed as a sandwich structure. The sandwich structure of the compensation block includes an upper insulating material block, a lower insulating material block, and an elastomer block arranged between the upper and lower insulating material blocks. The novel compensation block allows the formation of gaps due to settlement to be reduced.

Abstract: A damping bearing (20) including an inner ball portion (34) attached to an end of a support shaft (32), and an outer collar portion (30) attached to a housing (22) for rotation of the housing relative to the support shaft about a center point. A chamber (28) for a damping fluid such as grease is defined by clearance between the end of the shaft and the housing. The fluid chamber has opposed bounding surfaces (29, 37) that are non-spherical about the center of rotation so that the chamber changes shape upon rotation of the bearing, thus shifting damping fluid across the chamber. The chamber may be a flat cylindrical void normal to a centerline (33) of the shaft. It may provide only enough clearance for less than ±10 of relative rotation between the housing and shaft. A set-screw (26) may pressurize the fluid in the chamber.

Abstract: A damping bearing (20) including an inner ball portion (34) attached to an end of a support shaft (32), and an outer collar portion (30) attached to a housing (22) for rotation of the housing relative to the support shaft about a center point. A chamber (28) for a damping fluid such as grease is defined by clearance between the end of the shaft and the housing. The fluid chamber has opposed bounding surfaces (29, 37) that are non-spherical about the center of rotation so that the chamber changes shape upon rotation of the bearing, thus shifting damping fluid across the chamber. The chamber may be a flat cylindrical void normal to a centerline (33) of the shaft. It may provide only enough clearance for less than ±10 of relative rotation between the housing and shaft. A set-screw (26) may pressurize the fluid in the chamber.

Abstract: An electrostatic shield for an HVDC transmission component, the terminals of which lie at high potential relative to earth during operation, in particular for an HVDC transmission air-core coil, is distinguished by a sheathing, which is provided on at least one end with a collector electrode running substantially over its periphery for connection to one of the terminals of the HVDC transmission component, wherein the sheathing is made from a film composed of electrostatically dissipative material with a surface resistivity in the range of 109 to 1014 ohm/square.

Abstract: An electrostatic shield for an HVDC transmission component, the terminals of which lie at high potential relative to earth during operation, in particular for an HVDC transmission air-core coil, is distinguished by a sheathing, which is provided on at least one end with a collector electrode running substantially over its periphery for connection to one of the terminals of the HVDC transmission component, wherein the sheathing is made from a film composed of electrostatically dissipative material with a surface resistivity in the range of 109 to 1014 ohm/square.

Abstract: A process and apparatus for measuring the wear of a multiple disk brake while a wheel hub is rotationless. A measuring instrument is provided having a screw-like component and a spindle. A plug element located in a predetermined bore of the wheel hub is replaced with the screw-like component. The brakes are actuated, the spindle is moved while the brakes are actuated until the spindle comes into contact with a supporting disk that axially supports the multiple disks. The distance the spindle was moved is ascertained to form a first measured value. The brakes are then released, and the spindle is moved again, until the spindle again comes into contact with the supporting disk. The distance the spindle was moved is ascertained to form a second measured value. The difference between the first measured value and the second measured value is determined to ascertain a piston stroke, and the wear of the multiple disk brakes is ascertained from the piston stroke.