| 摘要 |
An apparatus for locating a fault point having increased conductor resistance in an electric guide loop to which is applied a periodic electrical signal from at least one current generator, the apparatus consisting of one single, completely freely movable unit which in a common housing comprises at least two means for coupling capacitively with the guide loop, which means are spaced a fixed distance apart, a first device which is connected to each one of the two capacitive coupling means for detection of any voltage difference between the capacitive coupling means, and a second device for indication of any changes in the voltage difference detected by the first device, thereby to indicate changes involving increased conductor resistance.
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