. Electric railway journal . chuckert double catenary design with automatic tension take-up devices. The poles on this section are set 64 m (210 ft.) of every station there is set a line-breaker which is bridged bya shunt circuit and horn-type switch. The horn switches areoperated from the ground with insulated rods. Lightning pro-tection devices are installed on the line at all stopping arresters are of the ordinary horn type and are placedin circuit between the trolley and ground; others are narrow-gap horn arresters which are connected to the trolley circuit,through a resistance
. Electric railway journal . chuckert double catenary design with automatic tension take-up devices. The poles on this section are set 64 m (210 ft.) of every station there is set a line-breaker which is bridged bya shunt circuit and horn-type switch. The horn switches areoperated from the ground with insulated rods. Lightning pro-tection devices are installed on the line at all stopping arresters are of the ordinary horn type and are placedin circuit between the trolley and ground; others are narrow-gap horn arresters which are connected to the trolley circuit,through a resistance. Each station is illuminated with no-voltcurrent from a i-kva transformer. 952 ELECTRIC RAILWAY JOURNAL. [Vol. XXXVII. No. 22. The transition from the 4000-volt single-phase suburbanpotential to the 400-volt, single-phase city potential is effectedthrough the medium of a dead running piece 16 m (52 ft. 8 in.)long which is placed between two 4000-volt circuit middle of the dead section has a tripping piece which. Parma Single-Phase Railway—Automatic Tension Take-UpWeights on the Poles effects the change-over of the car circuits. It is at this placealso that the catenary construction is replaced by the ordinaryform of line rolling stock for the suburban lines consists of ten
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