Siemens SIRIUS System Manual

3RU11, 3RB10, and 3RB12 overload relays
SIRIUS System Manual
4-18
GWA 4NEB 430 0999-02b
Figure 4-8: Time-current characteristic, chart for the 3RU11
3RB10
Tripping characteristic
The time-current characteristics show the behavior at starting, with a three-
pole load
¿
from a cold state
À
from a warm state
Á
in the event of phase loss or current imbalance (the phase loss protection
function triggers the overload relay after 3 seconds)
Figure 4-9: Time-current characteristics for class 10 and class 20, chart for the 3RB10
10
100
1000
10 000
5000
2000
500
200
50
20
5
2
1
1
2
5
10
40
60
100
0,6
0,81 2 34 6810 20304060
80 x
I
n
A
min
s
15
three-pole
load
two-pole
load
Current
Tripping time
CLASS 10 CLASS 20
10
6
4
6
4
2
124
10x
I
e
smin
NSB00294
0,6
1
6
8
10
50
1
2
20
40
1
2
3
Tripping time
Tripping current (mean values)
10
6
4
6
4
2
124
10x
I
e
smin
NSB00293
0,6
1
6
8
10
50
1
2
20
40
1
2
3
Tripping time
Tripping current (mean values)

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