NE200/300 Series Drive User Manual
34 Chapter 3 Wiring of Drive
forbidden to switch on/off the output contactor during the running of the
drive; otherwise, there will be large current flowing into the drive,
triggering the drive protection action.
Length of cable between the drive and motor
If the cable between the drive and the motor is too long, the higher order
harmonic leakage current will cause impact on the drive and the peripheral
devices. It is suggested that output AC reactor be installed when the motor
cable is longer than 100m, and that carrier frequency be set as follows:
3.5.3 Grounding Wiring
The drive will produce leakage current. The higher the carrier frequency is,
the larger the leakage current will be. The leakage current of the drive
system is more than 3.5mA, and the exact value of the leakage current is
determined by the site conditions. To ensure the safety, the drive and the
motor must be grounded.
The grounding resistance shall be less than 10ohm. For the grounding
wire diameter requirement, refer to 3.3 Main circuit peripheral devices
guide.
Do not share grounding wire with the welding machine and other power
equipment.
In the applications with more than 2 drives, keep the grounding wire from
forming a loop.
Cable length
between
drive and motor
Less than
50 m
Less than
100 m
More than
100 m
Carrier
frequency(F0.15)
Less than
10kHz
Less than
6kHz
Less than
4kHz
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