L1+L2 Residual Current Breaker Overload

At present, we have

1.1 Spliced electronic RCBO of L1+L2(2 bimetal +2 coil)
1.2 Electronic & unibody construction RCBO of L1+L2-(2 metal +1 coil)

2. At present, we have the technology to achieve it
2.1. Electronic &unibody construction L1+L2 RCBO

2.2. Electromagnetic & unibody construction L1+L2 RCBO