Shanghai Sigriner STEP Electric Co., Ltd.
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Figure A-12 Schematic Diagram of Electrical Installation of the Inverter
In order to meet EMC requirements, please pay attention to the following aspects during the
installation:
(1) The inverter should be installed in the cabinet, and the baseplate of inverter, the input filter
and other peripheral enclosures should be fixed on the back plate of the control cabinet to
ensure a good electrical contact with the back plate. The distance between the inverter and the
filter should be as short as possible and less than 15 cm, to minimize the high-frequency
impedance between the ground wire of inverter and the ground of input filter and reduce the
high-frequency noise.
(2) A wide grounding bar should be installed at the entrance of the control cabinet (no more than
5 cm away from the exit). The shielding layers of all cables entering and exiting the cabinet
should be fixed on the grounding bar by 360° loop connection to ensure a good electrical
contact.
(3) The shielded cables, preferably the ones with spiral metal belt and wire mesh for double
shielding must be used for motor cables. The shielding layer of the motor cable at the inverter
end must be fixed to the back plate of the cabinet by 360° loop connection (as shown in
Figure A.4) with metal cable clamps. There should be two fixing positions: one point should
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