Accessories
4.8 Residual current devices
3VA molded case circuit breakers with IEC certificate
440 Manual, 03/2019, A5E03603177010-03
Sealable protective covers of the residual current device
Contact hazard protective cover over main current paths and auxiliary contacts
Transparent protective cover over setting buttons
Transparent protective cover over setting buttons
In order to prevent unauthorized access to the settings for I
Δn
, Δt, type B/B+ and
RCD/MONITORING mode, the transparent cover over the settings buttons can be optionally
sealed.
In order to protect personnel, it is necessary to seal the transparent protective cover so that
the 30 mA setting range cannot be changed.
Contact hazard protective cover over main current paths and auxiliary contacts including
sealing option
After the residual current device RCD520B has been mounted on the 3VA11 molded case
circuit breaker, a contact hazard protective cover is installed over the main current paths to
protect against direct contact. This cover can be sealed optionally in order to block any
attempt to dismantle the residual current device from the molded case circuit breaker.
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