User Manual of A90 Series Inverter 3.2.5.2 Prohibition of connection of the power cable to output terminal Never connect the power cable to output terminal. When the voltage is applied on the output terminal, the internal components of the inverter may be damaged. 3.2.5.3 Prohibition of short circuit or grounding of output terminal Do not directly touch the output terminals, or short-circuit the output cable and inverter housing; otherwise, electric shock and short circuit may be caused. In addition, never short-circuit the output cable. 3.2.5.4 Prohibition of use of phase-shifting capacitor output circuit; otherwise, the inverter may be damaged.
Do not connect a phase-shifting advanced electrolytic capacitor or LC/RC filter to the 3.2.5.5 Prohibition of use of electromagnetic switch Do not connect the electromagnetic switch or electromagnetic contactor to output circuit. Otherwise, such devices will enable overcurrent and overvoltage protection and even damage the internal components of the inverter in severe cases. When an electromagnetic contactor is used to switch the PF power supply, make sure that switching is not performed until the inverter and motor are shut down.
3.2.5.6 Installation of noise filter on output side Connect a noise filter on the output side of the inverter to reduce inductive interference and radio interference. Inductive interference: Electromagnetic induction will lead to noise of the signal line and malfunction of controls. Radio interference: The high-frequency electromagnetic waves emitted by the inverter itself and cables will cause interference to nearby radio devices and noise in signal reception. The noise filter installation on the output side is shown in Fig. 3-7. 33