User Manual of A90 Series Inverter electromagnetic contactor on the incoming line side must not exceed once every 30 min. After the power supply is restored, the inverter will not run automatically. 3.2.4.4 Connection with terminal block terminal block, so that the terminals of the input power supply can be connected arbitrarily. The phase sequence of the input power supply is unrelated to that (R, S, T) of the 3.2.4.5 Installation of AC reactor When a large-capacity (above 600KVA) power transformer is connected, or the input power supply is connected to a capacitive load, a high inrush current will be generated, which will cause damage to the rectifier part of the inverter.
In this case, please connect a three-phase AC reactor (optional) to the input side of the inverter. This will not only suppress the peak current and voltage, but also improve the power factor of the system. 3.2.4.6 Installation of surge suppressor When an inductive load (electromagnetic contactor, solenoid valve, solenoid coil, electromagnetic circuit breaker, etc.) is connected near the inverter, please install a surge suppressor. 3.2.4.7 Installation of noise filter on power supply side The noise filter is used to suppress the noise that invades the inverter from the power cable, and the impact of inverter noise on the power grid. Use a dedicated noise filter for the inverter.
Ordinary noise filters do not have good effects, so they are not used usually. The correct and incorrect installations of the noise filter are shown in Fig. 3-5 and Fig. 3-6. 31