Instructions for testing telegraph lines and the technical arrangements of offices (1878)
Schwendler, Louis, 1838-1882 · London : Trèubner · leaf 203
s are at the disposal of thetestino; officer. The principle of the method is to determine bymeasurement the value of the ratio between the resis-tances of the two sections of the loop included respec-tively between the one end of the loop and the fault,and the fault and the other end of the loop.… … The metallic junction between the two lines at thedistant station should be carefully insulated from theground. We will at first suppose that, except at thefault, the loop is perfectly insulated. AVhen there isbalance in G, we have, with earth on Bridge,^ b~ yFurther X -\- y =W either known from…
Telegraph · Telegraph lines
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