●  In a first step, a TDR.750 does a low voltage reflection
    measurement of the cable, not "seeing" the high resistive fault.

 

●  In a second step the energy of a surge generator is released

    into the faulty cable, passing through the arc stabilising filter

    MIM.7505.

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●  This surge causes a flashover at the weak spot in the cable.

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●  Simultaneously, the MIM triggers the TDR and automatically
    couples a standard TDR reflection measurement onto the HV
    surge.

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●  The TDR can now "see" the low resistive arc at the weak spot
    as a short-circuit. This picture is stored as fault-picture and
    compared with the previously measured reference picture.

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●  The point of separation of the two traces is the fault location
    and the TDR Teleflex will indicate the distance to the fault.

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