Fitted a new design Proteus board a few weeks ago, and one of there improvements is that all RCBOs are now biderectional, as well as SPD with built in fuse, no need for upfront MCB….
But is the bidirectional RCBO the way everyone is going now?
I understand for specific circuits, ie PV, battery storage and vehicle based battery storage… but what about regular circuits that are only downstream from the consumer unit?
Say you have a lighting circuit on a 6A RCBO and something develops a fault… Could this fault affect any other bidirectional RCBO as it would be detected coming from the busbar side?
Depending how sensitive the 6A is, that it doesn’t trip first.
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But is the bidirectional RCBO the way everyone is going now?
I understand for specific circuits, ie PV, battery storage and vehicle based battery storage… but what about regular circuits that are only downstream from the consumer unit?
Say you have a lighting circuit on a 6A RCBO and something develops a fault… Could this fault affect any other bidirectional RCBO as it would be detected coming from the busbar side?
Depending how sensitive the 6A is, that it doesn’t trip first.
Continue reading...
