User Manual of A90 Series Inverter
33
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
Do not connect a phase-shifting advanced electrolytic capacitor or LC/RC filter to the
output circuit; otherwise, the inverter may be damaged.
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.
