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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)
Yes
Yes
No
Test function
Yes
Yes
Yes, electronic
Protection of
direct-current machines
Yes
No
No
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
Содержание SIRIUS
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