CIRCUITS AND MEASUREMENT VALUE RECEIVER FOR DETECTING AND MEASURING LIGHT SOURCES
A circuit arrangement and a measurement value receiver detect and measure light sources, preferably electric arcs in switching appliances. An optical emitter (1) that continuously or periodically emits a signal during measurement time and an optical receiver (3) are linked by a measurement and checking loop (4) composed of two optical waveguides (7, 8) between which is connected an optical measurement value receiver (9). The measurement value receiver to be connected in the circuit arrangement comprises a cylindrical sleeve (57) in plexiglass pushed on the second end (53) of a first optical waveguide (51) and on the first end (54) of a second optical waveguide (53). The cladding (55, 56) of the optical waveguides is glued to the inner side of the sleeve (57). The ends (53, 54) of the optical waveguides are spaced apart on a common longitudinal axis.