5.8 AC Fault Location with Interruption Measurement
Test Procedure
Select the INTERRUPTION mode and press ENTER and then the
measuring arrangement appears
The far endings of the pair should be open.
• Start the measurement pressing the START/STOP key
Displayed Test Results
• Lx/L relative distance of fault compared to the cable length
• Ca-E wire capacitance between the instrument and fault
• Cb-E ground capacitance of wire b
To save the test result press the SAVE (F1) key
Calculation of DTF when the cable parameters are known
When the cable type is known the length (DTS) and the distance to fault
(DTF) can be calculated of the measured capacitances.
• To enter or change the cable type press the C.LIBR (F6) key
select a cable type and press ESC
Calculation of DTF when the cable length is known
The DTF can be calculated from the Lx/L value when the length is known.
To enter the length of the cable press the LENGTH (F5) key, type in the
length value and press ENTER
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