Chapter 4 Wiring of Inverter
Shanghai Sigriner STEP Electric Co., Ltd.
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Figure 4-17 Layout of main circuit wiring 2
Generally, the control cable must be shielded and the shielded wire mesh must be connected to the
metal chassis of the inverter through the cable clips at both ends. As in Figure 4-18.
Figure 4-18 Comparison of grounding methods
4.4.4 Better anti-interference measures
The better anti-interference measures are to set noise filters on both the input and output sides of the
inverter, and to place the inverter body also in the iron box to shield it. See Figure 4-19.
Figure 4-19 Better anti-interference measures
4.4.5 Relationship between wiring length and carrier frequency
If the wiring between the inverter and the motor is too long, it will increase the high harmonic
leakage current due to the influence of the distributed capacitance of the wire, which may make the
inverter output over-current protection and have adverse effects on the surrounding equipment and
the motor. Therefore, the length of the wiring between the inverter and the motor should not exceed
100 meters. If the wiring length exceeds 100 meters, please reduce the adjusting carrier frequency
parameter P71.14, and install the output side filter and reactor.
4.5 Wiring of control circuit terminals
4.5.1 Layout of control circuit terminals
The layout of control circuit terminals is shown in Figure 4-21 Control circuit terminals.
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