Electrical panel wiring

[Salar]

Hi,
I have a main panel in my site and recently I add a sub panel 40M far from the main panel to control the electricity and separate it from upstairs site, my question is:
I have 3 RCD's in main panel (63A 30ma) for each phase and for the sub panel I used a separate 3phase RCD in it which the electricity via cable is coming from ISOLATOR to the 3phase RCD, the problem begins when I want to use the sockets which connected to the sub panel, whenever I want to use a plug, one of the RCD's inside the MAIN panel triggers, but there is no action on the 3phase RCD inside the sub panel!!!
Can someone please help me with this issue ??? if you need more information, just ask.

Thanks you.

[Manon_Chaboud · Accepted solution]

Hello @Salar, this type of question needs to be relayed straight to your country CCC L1.

Thank you!