The maximum leakage current that can be reduced with the aid of the LeaXield is 1 A (peak value). Care should be taken not to exceed this value. Higher leakage currents can result in malfunctions or destruction of the device. To ensure that the maximum leakage current of 1 A is not exceeded, a leakage current measurement over time is first necessary.
The block diagram shows a typical drive system consisting of EMC filter, inverter and motor. For the analysis, the aggregate current via L1, L2 and L3 shall be measured with a current probe on the line side of the EMC filter. All three phases are to be conducted through the current probe (marked in green in the block diagram). A residual current measuring device should be used for the evaluation. Alternatively, an oscilloscope can also be used.
Important: The residual current must always be measured across all phases and not to ground.
The measurement example below shows the maximum leakage current that flows into the system/machine on the line side. The peak value is about 500 mA and is thus lower than the maximum permissible value of 1 A. In this case it is possible to use the LeaXield.