3RU11, 3RB10, and 3RB12 overload relays
SIRIUS System Manual
4-8
GWA 4NEB 430 0999-02b
Overload relay: compar-
ison
The following table compares the thermal and electronic overload relays in
terms of their configuration and functionality:
Table 4-3: SIRIUS overload relays, configuration and functions
1)With 13 % current reduction, up to 60 °C without restrictions
3RU11 3RB10 3RB12
Tripping classes CLASS 10 CLASS 10 or 20 CLASS 5/10/15/20/
25/30
Switchable
Current range 0.1 to 100 A 0.1 to 100 A 1.25 to 820 A
Permissible operating
temperature
-20 to +70 °C
1)
derating
-20 to +70 °C -25 to +70 °C
Auxiliary contact ele-
ments
1 NO + 1 NC 1 NO + 1 NC 1 NO + 1 NC over-
load
1 NO + 1 NC
ground fault
Manual/auto RESET Switchable Switchable Switchable
Electrical remote RESET Accessories Accessories Integrated
Mechan. remote RESET Accessories Accessories No
Stop button
(only effects NC contact)
Ye s Ye s N o
Test function Yes Yes Yes, electronic
Protection of
direct-current machines
Ye s N o N o
Protection of
single-phase motors
Yes No Only in the case of
devices without
internal ground
fault protection
Screw-type terminal Yes Yes Yes
Main conductor connec-
tion
Screw-type termi-
nal
Screw-type termi-
nal
Up to 100 A with
Bar-type trans-
former
Cage Clamp terminal Yes (S00)
S0 to S3: auxiliary
conducting leads
only
No No
To Next Page
Loading...
Need help?
General