YASKAWA V1000 Series Technical Manual page 254

6.9 Troubleshooting Without Fault Display
Peripheral Devices Affected by Drive Operation
n
Cause
Radio frequency interference may be generated by drive output PWM
waveform.
Ground Fault Interrupter Activates When Drive is Running
n
Cause
The output of the drive is a series of high frequency pulses (PWM), so
there is a certain amount of leakage current. This may cause the ground
fault interrupter to operate and cut off the drive input power.
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• Change the Carrier Frequency Selection (C6-02) to lower the carrier frequency. This will help to reduce the amount of
transistor switching noise.
• Install an Input Noise Filter at the input power terminals.
• Install an Output Noise Filter at the motor terminals.
• Use conduit. Metal can shield electrical noise.
• Ground the drive and motor.
• Separate main circuit wiring from control wiring.
• Change to a ground fault interrupter with a higher leakage current detection level (such as, a sensitivity current of 200 mA
or greater per Unit, with an operating time of 0.1 s or more), or one that incorporates high-frequency countermeasures.
• Change the Carrier Frequency Selection (C6-02) to lower the carrier frequency. Note: Leakage current increases in
proportion to cable length.
YASKAWA ELECTRIC SIEP C710606 18A YASKAWA AC Drive – V1000 Technical Manual (Preliminary)
Possible Solutions
Possible Solutions