Thank you for this explanation, well, I was only confused by this Board, but this isn't part of my job. One friend of mine toke a job trip to Saudi Arabia and take a picture of this board, sice i was at technic school I'm affascinated by electric world, and I don't understant how to set up this particular kind of board.
During another trip in Dubai my friend understood that this is a split busbar board and it is used for 2 separated circuit:
Split busbar DBs are generally used when it is required to have separate protection for selective circuits.
the new specification for Split bus bar DBs, the circuit will generally be configured as follows.
Primary incomer – 4 pole Isolator ( or MCBs)
Sub incomer – 2 numbers 4P RCCBs.
- One RCCB will be of high sensitivity ( 30 mA ) – this RCCB would be connected to Section one of outgoings (MCBs). These outgoings are connected to “control loads” as it is called, which are basically,the switched sockets, shavers, cooker units etc where human interaction is more and hence the level of protection.
- The other RCCB will be of low sensitivity ( 100/300 mA ) – this RCCB would be connected to Section two of outgoings (MCBs). These outgoings are connected to “lighting loads”. Here since the risk is less, it is considered OK to use RCCBs of low sensitivity.
Outgoings – MCBs
This is the right answer...but thank u too much for your reply