Safety Precautions - Omron K7GE-MG User Manual

1 Overview
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Safety Precautions

Be sure to install the contactor in front of the load to be measured.
The K7GE-MG uses the same Megger method as a Megohmmeter for detecting insulation resistance.
The Megger method measures resistance values with a measuring circuit connected between the
charged section and the non-charged section. The charged section is usually connected to the power
line and insulated from the ground. Also, the non-charged section is a grounded section such as a
motor frame. The measurement circuit of K7GE-MG is connected between different insulated circuits.
Therefore, if the charged sections turn ON during measurement, it may result in a ground-fault
accident.
Also, although the voltage is low, applying a Megger voltage to the output circuit of the secondary coil of
the inverter may cause an inverter failure.
Inverter
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Insulation Resistance Monitoring Device User's Manual (N224)
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