Hi,
We've got a boat system with 3 parallel Quattro 24/8000 and 40kWh batteries running as single phase.
When we power it from shore and Quattro clutches, the shore side RCD trips.
I've measured the leak current and it is 48mA in total for all 3 devices.
When we switch it off using Cerbo (physical switch stays on ON), then leak current stays at 8mA.
I'd assume 48mA is quite high for a leakage current, but correct me if I'm wrong.
To advance the answer, yes, the output breakers are opened so we only measure Quattro leak current, not the devices behind it.
Earth-relay is set as ON.
Cables are brand new, so I wouldn't expect that to be the cause. Megger test showed no issues.
Any ideas where should we look for the fault?
KR,
Lucas