IACDRIVE I5000 Series Operation Manual page 27

current, which is the current passing through the common ground wire, can not only flow into
inverter system but also other devices. It also can make leakage current circuit breaker, relay or
other devices malfunction. The value of line-to-line leakage current, which means the leakage
current passing through distributed capacitors of input output wire, depends on the carrier
frequency of inverter, the length and section areas of motor cables. The higher carrier frequency
of inverter, the longer of the motor cable and/or the bigger cable section area, the larger leakage
current will occur.
Countermeasure:
Decreasing the carrier frequency can effectively decrease the leakage current. In the case of
motor cable is relatively long (longer than 50m), it is necessary to install AC reactor or sinusoidal
wave filter at the output side, and when it is even longer, it is necessary to install one reactor at
every certain distance.
4.7.3.5 EMC Filter
EMC filter has a great effect of electromagnetic decoupling, so it is preferred for customer to
install it.
For inverter, noise filter has following categories:
Noise filter installed at the input side of inverter;
Install noise isolation for other equipment by means of isolation transformer or
power filter
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