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Control panel designed in consideration of possible influences of noise
Inverters produce high-frequency noise. To avoid influences of noise, measures must be taken
in designing a control panel. Here are some examples of measures against noise.
Separately install the wires of the main circuit and those of the control circuit. Do not install
their wires in the same duct or in parallel with each other, and do not bind them together.
Use shielded wires or twisted wires for the control circuit.
Separate the input wires (on power supply side) of the main circuit from the output wires (on
motor side). Do not install them in the same duct or in parallel with each other, and do not bind
them together.
Be sure to ground the grounding terminal (G/E) of the inverter.
Be sure to connect a surge suppressor to every electromagnetic contactor and every relay
installed near the inverter.
Install noise filters, as required.
Notes on the installation of two or more inverters in a single cabinet
When installing two or more inverters in a single cabinet, take the following precautions:
Leave a clearance of at least 10 cm between inverters placed side by side.
Leave a clearance of at least 20 cm between inverters placed one above another.
Install a deflector, etc., to prevent the upper inverter from being affected by heat produced and
being exhausted by the lower one.
Deflector
Inverter
Inverter
Cooling fun
Installation of Cooling fun