Presumably the potential for coming to grief is very Zs and PSSC dependent, as it should relate to how much the MCB comes to bits or ejects flames and hot metal drops during normal breaking operation - which really should not be that often . (cheese cloth tests)
Mike.
So I think that's the point. At the origin, the full prospective fault current is there. For single-phase supplies up to 100 A, you have 6 kA OCPDs that have been tested for 16 kA conditional short circuit rating by the manufacturer.
Elsewhere in the installation, you select the device with an appropriate prospective fault current rating and things are hunky-dorey.
Presumably the potential for coming to grief is very Zs and PSSC dependent, as it should relate to how much the MCB comes to bits or ejects flames and hot metal drops during normal breaking operation - which really should not be that often . (cheese cloth tests)
Mike.
So I think that's the point. At the origin, the full prospective fault current is there. For single-phase supplies up to 100 A, you have 6 kA OCPDs that have been tested for 16 kA conditional short circuit rating by the manufacturer.
Elsewhere in the installation, you select the device with an appropriate prospective fault current rating and things are hunky-dorey.
