ᐅ Submersible pump trips the residual current device (RCD) when switched on

Hello everyone,
I bought a submersible pump (model 30136). When I switch it on, a residual current device (RCD) always trips. I contacted the manufacturer and received a replacement. The new one has the same issue.
I thought the problem might be with my power supply or wiring. I checked everything again and found no faults.
Then I got another pump (from a different manufacturer) with almost the same power (900W instead of 950W). This one works perfectly.

Could this be a series defect with the pump (manufacturer)?
Does anyone have any advice for me?
THANK YOU all.

You’ve already given yourself that advice. Try other manufacturers.

I just wonder why a submersible pump is protected with a residual current device (RCD).

hanghaus2000 schrieb:

You’ve already given yourself the advice. Try other manufacturers.

I just wonder, why is a submersible pump protected with a residual current device (RCD)?

Well, the outdoor outlet will already be connected through an RCD anyway...

immermehr schrieb:

Would anyone have a tip for me?

RCD installed and the pump’s inrush current too high? Try plugging one or two extension reels between the outlet and the pump and test again.
I can’t imagine a manufacturing defect. It has consistently good reviews.