RCD breaker trip

I installed an RCD circuit breaker in front of a Quattro (24/5000/120-100/100 ), and when the power of the equipment increase , the circuit breaker trips. Does anyone know the reason?
Was the RCD breaker tripping due to Power Assistant mode?

“in front of” is on AC In or AC out side? Is there a generator? Does it have an MEN? MEN on the Quattro AC Out side?
When does the breaker trip relative to the Quattro accepting the generator?

It is on the AC input side. Yes, it has an MEN system, and the MEN is on the generator side. The ground relay is enabled in the Quattro. When the PowerAssist function of the Quattro is active, the AC input side RCD breaker tripped