G - Physics – 01 – R
Patent
G - Physics
01
R
G01R 31/11 (2006.01) G01R 31/08 (2006.01)
Patent
CA 2118331
PROCESS AND APPARATUS FOR THE LOCATION OF CABLE DEFECTS ABSTRACT OF THE DISCLOSURE A process used to locate cable faults, in particular to locate non-burnout cable faults in the vicinity of branched cables. The pulse reflection method is used and a capacitor is charged and then discharged across a spark gap by mean of spark- over at a fault in the cable. Simultaneously with a main capacitor in an impulse wave generator, a second pulse capacitor is discharged into the cable by means of a short circuit switch. The resulting reflection wave is input via a decoupler into a first channel of a digital storage unit. After opening the short circuit switch, the main capacitor in the impulse wave generator and the second pulse capacitor are again charged and then again discharged into the faulty cable by closing the main switch. The pulse capacitor is discharged by means of a plasma-triggered spark gap. The spark gap is triggered by the charge of the impulse wave generator. As a result of a delay in the formation of the plasma, the discharge pulse of the pulse capacitor reaches the fault location in the cable just after ignition. The resulting reflection wave, with no ignition delay, is input via the decoupler to a second channel of the digital storage unit. The fault location is determined by analyzing the differences between the two recordings.
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Hagenuk Kmt Kabelmesstechnik Gmbh
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