Megger SG32-1500M, Руководство пользователя

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Getting to know your MTDR100
SG32-UG-EN-V01 Dec 2016
51
Loop-off / Loop-on
In this method, which uses the standard Current Impulse techniques, two traces
are recorded and compared. For this method to work there must be a 2 or 3
phase circuit available with at least one good core As in standard Current
Impulse a flashover is created using the surge generator (thumper) and recorded
on the MTDR. A bridge or “short” is then connected at the far end between the
faulted core and a good core (for convenience the bridge or short can be placed
at the near end; however the far end is preferred for better clarity). The output
of the surge generator is connected to both the faulted and good core and then a
second flashover is created and the resultant trace recorded on the MTDR.
These two traces are transposed and the point of change (divergence) is an
indication of the fault position.
Display
The display of the MTDR100 is designed to be "user friendly", whereby all
operator selection is via a series of menus and drop-down sub-menus.
Display: XGA 1024 x 768 (10.4” / 26.55mm)
Trace
Status Bar
Left Cursor
Right Cursor
Menu and
Sub-Menus
HV Trace #
TRIGGER ON
LIVE TRACE
Menu and
Sub-Menus
HV Trace #