Table 4-3: Sirius Overload Relays, Configuration And Functions - Siemens sirius System Manual

3RU11, 3RB10, and 3RB12 overload relays
Overload relay: compar-
ison
4-8
The following table compares the thermal and electronic overload relays in
terms of their configuration and functionality:
Tripping classes
Current range
Permissible operating
temperature
Auxiliary contact ele-
ments
Manual/auto RESET
Electrical remote RESET
Mechan. remote RESET
Stop button
(only effects NC contact)
Test function
Protection of
direct-current machines
Protection of
single-phase motors
Screw-type terminal
Main conductor connec-
tion
Cage Clamp terminal

Table 4-3: SIRIUS overload relays, configuration and functions

1)With 13 % current reduction, up to 60 °C without restrictions
3RU11
CLASS 10 CLASS 10 or 20
0.1 to 100 A 0.1 to 100 A
1)
-20 to +70 °C -20 to +70 °C
derating
1 NO + 1 NC 1 NO + 1 NC
Switchable Switchable
Accessories Accessories
Accessories Accessories
Yes Yes
Yes Yes
Yes No
Yes No
Yes Yes
Screw-type termi- Screw-type termi-
nal nal
Yes (S00) No
S0 to S3: auxiliary
conducting leads
only
3RB10 3RB12
CLASS 5/10/15/20/
25/30
Switchable
1.25 to 820 A
-25 to +70 °C
1 NO + 1 NC over-
load
1 NO + 1 NC
ground fault
Switchable
Integrated
No
No
Yes, electronic
No
Only in the case of
devices without
internal ground
fault protection
Yes
Up to 100 A with
Bar-type trans-
former
No
SIRIUS System Manual
GWA 4NEB 430 0999-02b