3.13 Decrease Noise
72 YASKAWA SIEPYEULA5001C LA500 Technical Manual
3.13 Decrease Noise
Note:
The main circuit terminal block for the drive and the terminal blocks for the AC and DC reactors come in different shapes. Correctly
prepare the ends of the wiring.
◆ Connect a Noise Filter to the Input Side (Primary Side)
High-speed switching makes noise in the drive output. This noise flows from the drive to the power supply, and
can have an effect on other equipment.
Drive models LA50CxxxxExx have built-in input noise filters. When you use these drives, make sure that the
filter specifications align with the application and applicable regulations. Refer to European Standards on page
112 for more information.
When you use a drive without built-in noise filter, install a noise filter to the input side of the drive to decrease the
quantity of noise that flows to the power supply. A noise filter will also stop noise from entering the drive from
the power supply. Contact Yaskawa for more information.
• Use a noise filter specially designed for drives.
• Install the noise filter as close as possible to the drive.
A - Power supply
B - Input side (primary side) noise filter
C - Drive
D - Other controller
Figure 3.35 Example of Connecting the Noise Filter on the Input Side (Primary Side)
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