Megger MTO210, Инструкция по эксплуатации

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M
AVTMMTO210 Rev 7 Sept 2013
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built-in. It will automatically initiate when the current source is disconnected
from the transformer. It will also provide visual indication of discharging.
DEMAGNETIZATION FUNCTION
This button, when pushed will perform a transformer
demagnetization. The
Demag Indicator to the right will illuminate
during the demagnetization cycle.
The demagnetization of a transformer after testing is critical for smooth
transformer startup. If there is a large residual flux present in the transformer at
startup, inrush currents on the primary side of the transformer may exceed relay
settings for shutdown, therefore, it is advantageous to perform demagnetization
after a winding resistance test sequence has been run and the transformer is
scheduled back into service.
The MTO demagnetizes the transformer by automatically magnetizing the core
of the transformer in the positive and negative direction with multiple cycles of
reduced current. During the demagnetizations, the unit will display what cycle
the unit is processing.
Demagnetization only needs to be accomplished once after all testing is
complete. CURRENT and VOLTAGE leads should be attached to high side
windings for more effective demagnetization.
The demagnetization cycle will take time for completion. It is equivalent to
taking multiple tests in sequence.
REMOTE TEST FUNCTION
The main purpose of this function is to take sequential data to storage during a
single test. It is useful for tap change testing where multiple resistance values are
to be read in sequence with no test lead movement.
1. Connect Remote Control Cable to the remote connector on the front
panel of the instrument.
2. Power ON (-) the instrument.
The Unit will detect the Remote Switch and display “rnnt 0/1”. The 0 is
when the switch is not pushed; the 1 is when the switch is pushed. This is the