Siemens SIRIUS 3RU - Page 79

Configuration
6.6 Application environment
SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays
Manual, 09/2016, A5E03656507420A/RS-AB/003
79
The following maximum rated operating currents are permissible for device versions with the
setting range 10 to 40 A for size S0:
Table 6- 12 Derating during heavy-duty starting, 3RB30/3RB31 overload relays (size S0)
Trip class
Rated operating current
CLASS 20E
I
e max
= 32 A
CLASS 30E I
e max
= 25 A
The following maximum rated operating currents are permissible for device versions with the
setting range 20 to 80 A for size S2:
Table 6- 13 Derating during heavy-duty starting, 3RB30/3RB31 overload relays (size S2)
Trip class
Rated operating current
CLASS 5E
CLASS 10E
I
e max
= 80 A
CLASS 20E I
e max
= 60 A
CLASS 30E
I
e max
= 50 A
Table 6- 14 Derating during heavy-duty starting, 3RB30/3RB31 overload relays (size S3)
Trip class
Rated operational current
CLASS 5E
CLASS 10E
I
e max
= 115 A
CLASS 20E
CLASS 30E
I
e max
= 100 A
Special application environments
SIRIUS components have been approved by a whole range of bodies for various sectors
(shipbuilding, etc.). Up-to-date information and certificates are available for download on the
Internet (https://support.industry.siemens.com/cs/ww/en/ps/16269/cert).