By means of specially equipped car, made at small expense out of old trolley car, rail bonds of streetcar line can be quickly tested for their electric resistance; within car is small motor-generator set which delivers 300 to 1000 amperes at 5 volts through axle-insulated wheels into rails; millivoltmeter indicates by more or less pronounced deflection relative values of each rail joint passed.
Rail-bond tester
Le controle rapide de l'eclissage electrique dans les reseaux de tramways a l'aide d'un train d'essais
Revue Generale de l'Electricite ; 18 , n 16
1925
5 pages
6 Figs.
Article (Journal)
French
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