SebaKMT’s HVB10 is a highly accurate high-voltage bridge designed to locate cable and sheath faults, perform sheath testing, and pinpoint sheath faults, especially suited also for long HV cables.
With its top resolution, intermittent fault detetion function, and load adaptation for faster cable charging, the HVB10 is an indispensable tool for all utilities that want to reduce downtime and facilitate repair of power and for example pilot and communication cables.
The HVB10 has two different methods for fault location:
- The standard mode, which provides good results for
typical sheath faults faults with fault resistances of up to
some hundreds of kilo Ohms and shield cross sections in
the range of 25 to 50 mm2. This measurement is typically
done in app 30 seconds
- The high accuracy mode, which takes approximately 1 minute for the algorithm to complete, but will utilize the full potential of the measuring and control circuits of the instrument. Thus, it is ideally suited for prelocating difficult, high-resistive faults (e.g. in the inner insulation of PILC cables). An intermittent fault detection algorithm is applied to gain a result under even worse conditions with sparking faults.
- Top measurement and accuracy
- Automatic test sequence
- Bi-polar prelocation for the elimination of external influences
- Detection and indication of wrong connections
- Only one HV connection cable
- Completely independent of the parameters of auxiliary lines
- SebaKMT´s easyGo principle
Why do you need an HV bridge when you have ARM based prelocation?
Because it locates faults where the otherwise perfect reflection based technologies have limits, for example on long cables as subsea cables.
- TDR reflection based technologies have very large reflections on crossbonded cables, which prevent longer ranges
- Reflection measurements are based on an impedance measurement, while the HVB10 measures resistance. Resistance- and impedance values can be completely different while having the same cause.
The HVB10 prelocation measurement and the common prelocation by reflection measurement or ARM Arc Reflection Measurement provide complementary information, which is very helpful in case of difficult faults, where critical decisions have to be done on a reliable base.