Appropriate MCB for 3phase and single phase circuits with 400hz frequency

[Kiwigroenie]

I'm trying to find the appropriate mcbs and RCDs to use for high frequency circuits.  Particularly mcbs

[Yarom · Accepted solution]

Hi,

You may look at FAQ to see information regarding the matter.

In general, Vigi version of the RCD is the best option, using the SI type. See page 39 of the RCD Technical guide:

https://www.se.com/ww/en/download/document/CA908066E/

Best regards,

Yarom

[Yarom · Accepted solution]

As for the mcb, acti9 are rated 400HZ as well. However, the magnetic trip increased, thereby longer short circuit protection.

See extract from CA908005E catalog attched.

Best regards,

Yarom

[Kiwigroenie]

Thanks for your help for this one.