Siemens SIRIUS System Manual

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

Siemens SIRIUS Specifications

General

Product brand name	Siemens
Series	SIRIUS
Coil Voltage	24V DC, 110V AC, 230V AC
Switching Capacity	Up to 10A
Mounting Type	DIN rail
Product designation	SIRIUS
Contact Material	Silver alloy
Contact Rating	Varies depending on the specific SIRIUS relay model (e.g., 6 A at 250 V AC, 10 A at 250 V AC)
Switching Voltage	Varies depending on the specific SIRIUS relay model (e.g., 250 V AC, 400 V AC)
Mechanical Life	Up to 10 million operations
Electrical Life	Up to 100, 000 operations
Operating Temperature	-25°C to +55°C
Protection Class	IP20
Size of relay base	Varies depending on the specific SIRIUS relay model