When connecting the leakage switch of the inverter, a special switch that meets the specifications should be used to ensure safety. Due to the high-order harmonics output of the inverter, its leakage current is much larger than that of a conventional leakage switch, so a larger specification or a special leakage switch should be selected. The relationship between the inverter and the distributed capacitor determines its leakage current. When the inverter drives the motor, the leakage current will significantly increase due to the high-frequency pulse width modulation voltage waveform output, which is hundreds of times higher than under normal circumstances.
Requirements for the leakage current switch connection of the inverter
When connecting the leakage switch of the inverter, a special switch that meets the specifications should be used to ensure safety. Due to the high-order harmonics output of the inverter, its leakage current is larger than that of a conventional leakage switch, so a larger specification or a special leakage switch should be selected.
The relationship between inverters and distributed capacitors
The relationship between the inverter and the distributed capacitor determines its leakage current. When the inverter drives the motor, the leakage current will significantly increase due to the high-frequency pulse width modulation voltage waveform of the output, hundreds of times higher than under normal circumstances.
Selection of leakage protection devices
The inverter can be used without the input leakage monitor. It can choose the network-side fuse or circuit breaker as protection. If the leakage switch needs to be adjusted, it can be achieved by adjusting the regulator or replacing the dedicated leakage protector. Increasing the equipment load or short-circuiting the leakage protector can reduce the leakage current at startup.
