Last year CBI Electric introduced the first three-phase, three-pole 54mm wide RCBO SFRSE7. This year it’s introducing the second three-phase, three-pole 54mm wide RCBO SFRSE4: the SE7.

There were many debates regarding the switching operation so to clarify this here is the excerpt from the standards 2.10.3.4 Orientation and location of fuses and circuit-breakers and 2.10.3.4.1 Orientation of circuit-breakers: “Where two or more circuit-breakers are mounted in the same row, the operating mechanism of each shall cause the circuit to open when the operating means are orientated in one general direction.

“Other arrangements are permitted where the open circuit condition of each device is obvious or where each device is clearly marked to indicate the off position.”

Some contractors have fed back the last point as having been accepted but now with the introduction of the SE4, that cloud of confusion or debate can be simply avoided by using the SE7 or the SE4.

The SE7 is designed to be chassis mounted on CBI QF10 6kA range of RCBOs and MCBs while the SE4 is designed to be chassis mounted with the new SFRSE3 10kA range of RCBOs and MCBs.

Both the SE7 and SE4 can be Din mounted.