Connection - AEMC 6550 User Manual

4.4.6 Connection

Depending on the measurements to be made, there are three ways of connecting the instrument.
In all cases, disconnect the device to be tested from the supply line.
■ Low Insulation
Connect the red high-voltage lead between earth and the + terminal of the instrument. Connect the black high-
voltage lead between one phase of the motor and the - terminal of the instrument.
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■ High Insulation
For very high insulation values, connect the small blue high-voltage lead between the rear pick-up of the black
lead and the G terminal - in this case the shield of black lead will be connected to the ground of the instrument,
which helps to avoid leakage current and capacitive current effects.
This reduces the influence of the operator's hands on the test leads and gives a more stable measurement.
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