3-6
Make external connections according to the following instruction. Check connections after wiring
to make sure all connections are correct. (Do not use the control circuit buzzer to check connections)
(A) Main circuit’s wiring must be separated from other high voltage or high current power line to
avoid noise interference. Refer to the figures below:
A general noise filter may not provide correct resultsThe inverter uses dedicated power line
~
General
noise
filter
~
General
noise
filter
Add a noise filter or separation transformer when
sharing the power line with other machines.
The inverter shares the power line with other machines
A noise filter in the output of the main circuit can suppress conducted noise.
To prevent radiated noise, the wires should be put in a metal pipe and distance from signal
lines of other control equipment should be more than 30 cm.
Power Supply
MCCB
o
se
Filter
Metal Box
Metal Pipe
Signal Wire
Controller
30 cm above
E310
Noise
Filter
Figure 3-4a) Installation Examples
Figure 3-4b) Installation Examples using a filter and Isolation transformer
Figure 3-4c) Installation Examples with Adjacent Signal Conductors
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