| 摘要 |
<p>A device (16) for locating faults on the lines (18) of electrical power distribution systems (10), including generally a variable impedance means (26) adapted for connection in series with an electrical power line (18), and means for switching (36) such variable impedance means (26) between a first low impedance value when an initial current I1 of predetermined level flows on the power line (18) for a predetermined period of time to enable detection of a fault condition, and a second high impedance value which limits the flow of current to a low level I2. A meter (46) or other indicating device provides a reading of the current I1 to determine if a fault condition exists. In this fashion, the fault locator device (16) limits both the magnitude and the time duration of the current when testing for a fault, so as not to adversely affect any system components.</p> |
