Since the current at the input and output of the inverter contains high-frequency components, the leakage current caused by the high-frequency components when driving with the inverter is greater than the leakage current when the grid is powered. Since there are many types of circuit breakers, in some cases, even if there is no problem in the insulation of the inverter wires and the motor, there is a possibility of malfunction due to leakage of high-frequency components. Therefore, the most likely cause is that the leakage current setting value is too small or the harmonic component of the inverter is too large. USB2.0 has USB A USB B
USB B shell plug-in Pin SMT, female 90 degree plug-in, female 180 degree plug-in, male 180 degree shell plug-in,
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We can solve the following countermeasures:
(1) Increase the sensitive current value of the leakage circuit breaker operation to an allowable level.
(2) Use an earth leakage circuit breaker with high harmonic countermeasures.
(3) Set a zero-phase reactor between the power supply and the inverter to suppress zero-phase current.
(4) Try to shorten the length of the wire between the inverter and the motor, and try to keep the wire frame off the ground to reduce the floating capacitance and leakage current.
(5) When the sensitive current value of the leakage circuit breaker operation cannot be changed, an insulation transformer is provided in the branch circuit and the circuit including the frequency converter.
(6) Select a wire with a small electrostatic capacity.
USB A has female housing plug-in pin SMT, female 90 degree plug-in, female 180 degree plug-in, male housing plug-in pin SMT, male 90 degree plug-in, male 180 degree wire bond.