Accessories
4.8 Residual current devices
3VA molded case circuit breakers with IEC certificate
422
Manual, 03/2019, A5E03603177010-03
Sealable protective covers of the residual current device
①
Contact hazard protective cover over main current paths and auxiliary contacts
②
Transparent protective cover over setting buttons
Transparent protective cover over setting buttons
In order to prevent unauthorized access to the setting buttons for I
Δn
and Δt, the transparent
cover over the settings buttons can be optionally sealed.
Note
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 RCD320 or RCD520 has been mounted on the 3VA1
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.