User Manual of A90 Series Inverter
31
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
The phase sequence of the input power supply is unrelated to that (R, S, T) of the
terminal block, so that the terminals of the input power supply can be connected arbitrarily.
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.
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