User Manual of EM730/EM730E Series Inverter
35
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.
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.
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.
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.
MCCB
Inverter
Noise filter
Control
device
Radio device
Signal lines
IM
Transmission interference
Fig.3-7 Noise Filter Installation on Output Side
