E6582233
A-23
1
Panel designing taking into consideration the effects of noise
The inverter generates high frequency noise. When designing the control panel setup, consideration must be
given to that noise. Examples of measures are given below.
Wire so that the main circuit wires and the control circuit wires are separated. Do not place them in the
same conduit, do not run them parallel, and do not bundle them.
Provide shielding and twisted wire for control circuit wiring.
Separate the input (power) and output (motor) wires of the main circuit. Do not place them in the same
conduit, do not run them parallel, and do not bundle them.
Ground the inverter ground terminals (
).
Install surge suppressor on any magnetic contactor and relay coils used around the inverter.
Install noise filters if necessary.
Installing more than one unit in a cabinet
If you are installing two or more inverters in one cabinet, pay attention to the following.
Inverters may be installed side by side with each other with no space left between them.
When installing inverters side by side, detach the caution label on the top surface of each inverter and
use them where the ambient temperature will not rise above 50°C.
When using inverters where the ambient temperature will rise above 50°C, leave a space of 2 cm or
more between them and remove the caution label from the top of each inverter, or operate each inverter
at a current lower than the rated one.
Ensure a space of at least 20 centimeters on the top and bottom of the inverters.
Install an air deflecting plate so that the heat rising up from the inverter on the bottom does not affect the
inverter on the top.
Ventilation fan
Inverter
Air deflecting plate
Inverter
