Siemens SENTRON 3VA1, Руководство пользователя

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Accessories
4.8 Residual current devices
3VA molded case circuit breakers with IEC certificate
Manual, 03/2019, A5E03603177010-03
459
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 RCD820 has been mounted on the 3VA2 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.
Terminals
Note
Cables for the following terminals must be routed separately from the main circuits. Their
maximum cable length is 300 m.
A number of auxiliary contacts which perform a broad range of functions are located
underneath the contact hazard protective cover.