Abstract: Protective sheath for fusion or adhesive optical waveguide splice. The protective sheath comprises a fusion bonding sleeve surrounding the splice and a shrinkable sleeve surrounding the fusion bonding sleeve. An oblong support is arranged between the fusion bonding sleeve and the shrinkable sleeve to protect the splice. The support has an open channel in which the splice is arranged.

Abstract: Solar power plant, including a tower, a solar heater disposed on the tower, a plurality of reflectors disposed in a given area for irradiating the solar heater, a water-steam circuit connected to the solar heater for conducting working medium thereto, a steam turbine connected in the water-steam circuit, a preheater for the working medium in the form of additional sunlight collectors being disposed outside of the given area and being connected to the water-steam circuit upstream of the solar heater, and means for adjusting the pressure in the water-steam circuit to cause the pressure of the steam in the solar heater to approximate the atmospheric air pressure outside.

Abstract: An overload-protection circuit for an electric motor has a current transformer whose primary winding is connected in series with the windings of the motor to be protected while two secondary windings are provided. The first secondary winding is connected to an actual-value current-monitoring circuit while the second secondary winding forms part of a voltage-supply network for the circuit. The primary winding is subdivided into a plurality of winding sections having respective taps for different nominal values of the overload current. The product of the number of turns of each winding section and the nominal-current value of the respective tap (ampere-turns) is the same for each winding and the respective tap.