Accessories
4.8 Residual current devices
3VA molded case circuit breakers with IEC certificate
Manual, 03/2019, A5E03603177010-03
437
Selecting the operating mode
Selection switch for RCD / MONITORING mode
Two different operating modes can be selected using the selection switch on the RCD520B:
● RCD mode
The device functions as a residual current device in RCD mode. When I
Δ
> I
Δn
, the
residual current device trips the molded case circuit breaker by means of a plunger.