Type 31, for 3 circuit-breakers: Two normal power supplies(A, C) and an emergency network supply (B). When B in Off, A and C can be switched on. B can be switched on only when A and C are in Off. Two sets of cables required in addition.
For use with
IZM20, 32, 40, 63…F IN20, 32, 40, 63…F
Possible switching states ￫ Engineering, Page 66
Design verification as per IEC/EN 61439(Show features)(Hide features)