Specifications

JiaXing Jarol Scientific Instrument Co.,Ltd － JR 6 000 series product s

control system should use common pole grounding, and different devices connected by same power

cable should use series-wound grounding.

4.4.3.4

4.4.3.4 Leakage

Leakage

Leakage Current

Current

Leakage current includes line-to-line leakage current and over-ground leakage current. Its value

depends on distributed capacitances and carrier frequency of inverter. The over-ground leakage 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

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.

4.4.3.5

4.4.3.5 EMC

EMC

EMC Filter

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.

4.4.4 The installation complies with following standards: