Megger PFL22M1500 Series, User Manual

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AVTMPFL22M Rev 1 April 2011
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Description of Impulse Current
Impulse current also known as ICE is probably one of the oldest methods of
fault Prelocation using “transient analysis”. This method allows the prelocation
of high resistance and flashing faults.
In Impulse Current we use an Impulse Generator, Inductive Coupler (C.T.) and
the MTDR100 which acts like a transient recorder. The surge generator creates a
flashover at the point of fault and the resultant transients are reflected back and
forward between the fault and the impulse generator. These transients are
picked-up by the Inductive couple and fed to the MTDR where they are
subsequently displayed.
Typical Trace