| 摘要 |
#CMT# #/CMT# The device (22) has an electric cable network (19) electrically supplying a low voltage to a public lighting element i.e. lighting column (20), of a public lighting system (10) e.g. single phase public lighting system. The network is provided with a connection terminal with an electric input voltage higher than an electric output voltage, a toroidal step-down transformer and an electrical protecting device e.g. electric fuse. The network is placed in an independent case that is molded of insulating material e.g. plastic material and epoxy resin, to ensure electrical protection of the network. #CMT#USE : #/CMT# Low voltage electric device for being fixed on a tower of a public lighting element i.e. lighting column, of a public lighting system e.g. single phase public lighting system and three phase public lighting system (all claimed) that is situated along a highway, using a fixation plate i.e. supporting plate, for supplying electricity to the lighting element. #CMT#ADVANTAGE : #/CMT# The electric device with adjustable height can be fixed on a tower of a public lighting element in a simple, easy, rapid and inexpensive manner, and can be efficiently protected against electricity theft. The network is placed in the independent case that is molded of insulating material for ensuring electrical protection of the network against humidity, and person against danger, and thus preventing badly intentioned person from accessing inner elements of the electric device. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a schematic perspective view of a public lighting system with different lighting columns. 10 : Public lighting system 16 : Transforming station 19 : Electric cable network 20 : Lighting column 21 : Tower 22 : Low voltage electric device. |
