Direction of incoming supply As required
Degree of protection
Device In the operating controls area: IP20 (basic degree of protection)
Enclosures With insulating surround: IP40, with door coupling rotary handle: IP66
Terminals Tunnel terminal: IP10
Phase isolator and strip terminal: IP00
Circuit-breakers
Rated impulse withstand voltage Uimp
Main contacts V 6000 6000 6000 6000
Auxiliary contacts V 6000 6000 6000 6000
Rated operational voltage Ue V AC 690 690 690 690
Overvoltage category/pollution degree III/3 III/3 III/3 III/3
Rated insulation voltage Ui V 690 690 690 690
For use in IT electrical power networks V 440 690 690 690