Baur Sys compact 2000 M pro, Руководство пользователя

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Cable fault pre-location Syscompact 2000 M pro
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Further information:

Chapter Printing measurement data (on page 45)

User manual for IRG 2000
12.5 ICM: Impulse current method
12.5.1 About the ICM method
The impulse current method (ICM) is suitable for pre-location of the following cable faults:

high-resistive faults

wet faults

faults in long cables

faults that cannot be located with the Time Domain Reflectometry due to high pulse
damping
A breakdown is generated at the fault through a HV surge pulse. The breakdown produces a
travelling wave that drifts between the connection point of the surge voltage generator and the
fault with alternating polarity. The current ratio of this transient wave is evaluated and the time
interval between the periodically recurring reflections is measured. The distance of the fault
position from the connection point is calculated from the measured time and the velocity of
propagation in the cable.