3-18
The cable between the Inverter and the motor should be as short as possible.
3G3EV
Power supply
Steel box
Noise
Filter
Noise
Filter
Metal pipe
D Cable Length between Inverter and Motor
If the cable between the Inverter and the motor is long, the high-frequency leakage current will increase,
causing the Inverter output current to increase as well. This may affect peripheral devices. To prevent
this, adjust the carrier frequency (set in n37) as shown in the table below.
Cable length between Inverter and motor 20 m max. 100 m max.
Carrier frequency (n37) 10 kHz max. (1, 2, 3, 4) 5 kHz max. (1, 2)
Note When the cable length between Inverter and motor exceeds 20 m, the system must be con-
firmed for conformity to the EMC Directives.
H Ground Wiring
• Always use a ground terminal with the following ground resistance.
200-VAC Class: 100 Ω or less
400-VAC Class: 10 Ω or less
Also connect to the power supply neutral.
• Do not share the ground wire with other devices such as a welder or power tool.
• Always use a ground wire that complies with technical standards on electrical equipment. Route the
ground wire so that the total length is as short as possible.
Design Chapter 3
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