MD380 User Manual EMC
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7.5 Solutions to Current Leakage
The output of the AC drive is high-speed pulse voltage, producing high-frequency leakage
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current leakage, it is necessary to install a residual current circuit-breaker for the AC drive.
Each AC drive produces more than 100 mA leakage current. Therefore, the sensitivity
current of the residual current circuit-breaker must be above 100 mA. High-frequency pulse
interference may cause the circuit-breaker to malfunction, and thus the residual current
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If multiple AC drives are required, each AC drive must be installed with a circuit-breaker. The
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AC drive capacity
Carrier frequency
Type and length of motor cable
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Increase the sensitivity current of the circuit-breaker.
Replace the circuit-breaker with a new one with high-frequency suppression function.
Reduce the carrier frequency.
Shorten the length of the output cable.
Install a current leakage suppression device.
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