The T-505 (PDF 155kb) Pinpoint Fault Locator is used with the T-602 (PDF 104kb) Audio Frequency Generator to precisely indentify the location of low resistance faults. When used with the T-303 (PDF 508kb) High Voltage Surge Generator it can precisely locate high resistance faults and flash-over faults in power cables. The T-505 is able to calculate distance to fault for:
The instrument has two(2) modes of operation; The LV Pulse Reflection (Time Domain Reflectometry – TDR) and the Impulse Current. The basic technique of either of these modes is that an electrical pulse is transmitted down the cable that is under test. Should the pulse encounter a Fault condition, an echo pulse is reflected back to the initiation point. By timing the period from the release of the initial pulse to the return of the echo pulse, the distance to fault can be calculated. By analyzing the shape of the echo pulse, the type of Fault can be determined.
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