E6581697
A-26
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.
ď‚· 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.
ď‚· Provide shielding and twisted wire for control circuit wiring.
ď‚· 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.
ď‚· Ground the inverter ground terminals ( ).
ď‚· Install surge suppressor on any magnetic contactor and relay coils used around the inverter.
ď‚· Install noise filters if necessary.
ď‚· To comply with the EMC directives, install the optional EMC plate and fix the shield to it.
ď‚· Install EMC plate and use shielded wires.
 Installing more than one unit in a cabinet
When two or more inverters are installed in one cabinet, pay attention to the followings.
ď‚· Inverters may be installed side by side with each other with no space left between them.
 When installing inverters side by side, use them where the ambient temperature will not rise above 40°C.
 When using inverters where the ambient temperature will rise above 40°C, leave a space of 3 cm or
more between them, or operate each inverter at a current lower than the rated one.
ď‚· Ensure a space of at least 20 centimeters on the top and bottom of the inverters.
ď‚· 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
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