DneproEnergoTechnologiya Ltd - DETEC

Iskra-3M in the time domain TDR relectometer <br /> High-voltage oscillographic reflectometer Iskra-3M is designed to prelocation precise cable fault. Without this knowledge pouint fault is not or only known. A good prelocation can determine the fault position within a small percentage of the cable length. Resulting from the defect borders are defined, and the time required for prospecting is reduced to a few minutes. This saves time work, and maintains the level of stress to the cable and its low armor. <br /> The device allows: <br /> · The prelocate and to find the distance to a point of failure in the cable or discontinuity using the Find method (reflectometry) for symmetrical and asymmetrical cables; <br /> · To measure the length of cables (including one in coils and coils) or the distance to the point of rupture or short circuit; <br /> · To save memory, to store and process the measurement results; <br /> · In conjunction with Surge wave generator (SWG / SWGB) or as a van cable test piece to measure the distance to a cable fault in up to 12 km long cables for all types of damage without the use of isolation full per-burning. <br /> The device saves 4 measuring groups (up to 15 reflectograms each) in the built-in non-volatile memory, as well as save them to a computer for further analysis and recording (optional). <br /> Parameter <br /> distance fullest extent of the damage site, 12.3 km <br /> minimum measurement distance to the place of damage, m 3 <br /> measurement resolution, 0.2 meters <br /> Parameter High voltage monitoring pulses at a load of 30 Ohm: · range, 3-25 kV <br /> · Acceleration time, uS, max. 0.15 <br /> · Pulse duration, uS, max. two <br /> Parameters of low voltage monitoring pulses at a load of 30 Ohm: <br /> · Range, V, min. 5 <br /> · Acceleration time, uS, max. 0.02 <br /> · Pulse duration, uS 0.03-10 <br /> Maximum operating voltage pulse voltage sensor, 60 kV <br /> The distance measuring error of the local damage at high voltage depends on the measurement mode and the damaged point of the breakdown voltage. When the distance measuring high voltage "floating collapse", idling, and short circuit modes, the error ranges from + 15 to + 25 meters at a distance of approx. 1 km, and + 20 + 40 meters, a distance greater than 1 km.