A、 the earth wire of the inverter and other electric products shall be well
grounded.
B、 the power input and output power cables on the inverter and weak
current signal cables (e.g. control line) shall not arranged in parallel
and vertical arrangement is preferable.
C、 it is recommended that the output power cables of the inverter employ
shield cables or steel pipe shielded cables ,all of its shielding layer be
grounded reliably, the lead cables of the equipment suffering
interference are recommended to employ twisted –pair shielded
control cables and its shielding layer be grounded reliably.
D、 When the length of motor cable is longer than 100 meters, it needs to
install output filter or reactor
6.3.3 Handing method for the interference of the surrounding equipment on the
inverter
generally these reason for electromagnetic interference on the inverter is that
at some places nearby inverter where plenty of relays, contactors and
electromagnetic brakes shall be installed .when the inverter has error action due to
the interferences ,the following measures ca be taken:
A、 install surge suppressor on the devices generating interference
B、 install filter at the input end of the inverter ,refer to Section 7.3.6 the
specific operations
C、 the control signal cable of the inverter and cable of detection line
shall employ shielded cable and the shielding lays shall be earthed
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