Appendix
9.3
Key terms and definitions for specifying the switching capacity
Rated switching capacity I
Prospective rms value of the short circuit current which an RCCB can make,
carry and break under defined conditions.
Rated switching capacity I
The rated switching capacity of an RCBO is the limit short-circuit breaking capacity
specified by the manufacturer.
Rated residual switching capacity I
Prospective rms value of the residual current which the residual current protective
device can make, carry and break under defined conditions.
Rated conditional short-circuit current I
Prospective current which the RCCB, protected by a short-circuit back-up fuse,
can withstand without suffering functional impairment.
Rated conditional residual short-circuit current I
Prospective residual current which the RCCB, protected by a short-circuit back-up
fuse, can withstand without suffering functional impairment.
84
of the RCCB (EN 61008-1)
m
of an RCBO (EN 61009-1)
cn
(EN 61008-1, EN 61009-1)
Δm
(EN 61008-1)
nc
(EN 61008-1)
Δc