Abstract: The aim of the invention is to ensure efficient coolilng in an electric rotary machine (2), in particular in a high-voltage generator. To achieve this, the invention provides a coolant channel (10) which extends in a radial direction and in which a number of high-voltage conductors (14) are located. A coolant gas is preferably used as the coolant. The advantage of positioning the high-voltage cables (14) in the coolant channels (10) is that the coolant comes into direct contact with said high-voltage cables (14), thus ensuring efficient and uniform cooling.

Abstract: The aim of the invention is to ensure efficient coolilng in an electric rotary machine (2), in particular in a high-voltage generator. To achieve this, the invention provides a coolant channel (10) which extends in a radial direction and in which a number of high-voltage conductors (14) are located. A coolant gas is preferably used as the coolant. The advantage of positioning the high-voltage cables (14) in the coolant channels (10) is that the coolant comes into direct contact with said high-voltage cables (14), thus ensuring efficient and uniform cooling.

Abstract: The invention relates to an electric rotary machine (2), especially a high-voltage generator. The aim of the invention is to provide such a machine with a more efficient cooling and a good insulation. To this end, the high voltage conductors (14) are embedded in channels (12) via a special ceramic powder embedding material (20). Said embedding material (20) has a good thermoconductivity, excellent electrical insulation properties and contains especially aluminum oxide and aluminum nitride as the powder components.

Abstract: A process for measuring electric voltages and/or electric fields by the use of a crystal with an electro-optical (Pockels) effect. To this end, in a direction transverse to the direction of propagation (y direction) of a light wave polarized in the z direction, an electric field intensity gradient is generated in the crystal in the direction from which results a corresponding gradient in the refractive index n of the crystal. This produces a deflection of the light wave in the crystal which depends upon the field intensity and on emergence, it is used as a measure for the voltage of field intensity. A suitable sensor for this purpose is also described.

Abstract: In the case of a fiber optics arrangement for measuring the intensity of an electric current while utilizing the Faraday effect in which the magnetic field surrounding the conductor 1 through which the current flows affects the polarization condition of the light, the path of which leads through the core of an optical fiber 2 which surrounds the conductor 1 in the form of a coil, the light coupled out of the optical fiber 2, by means of a beam splitter 9, being divided into two partial light beams, the intensities (I.sub.1, I.sub.2), after passage through one polarizer 12, 11 respectively, being measured by one photodetector 14, 13 respectively, the object of expanding the measuring range of the arrangement is achieved by the fact that the polarizers 12, 11 are rotated symmetrically with respect to one another in comparison to the conventional angle of 45 degrees, the angle (.alpha.