Siemens SIRIUS System Manual

3RV1 circuit breakers
SIRIUS System Manual
2-12
GWA 4NEB 430 0999-02b
Frequency sensitivity of
the short-circuit
releases
The characteristics of the short-circuit releases apply to frequencies of 50/
60 Hz. For lower frequencies, such as 16
2
/
3
Hz, for higher frequencies up
to 400 Hz, and for direct current, appropriate correction factors have to be
taken into account.
The following characteristic curve illustrates the frequency sensitivity of the
short-circuit releases (calibrated to 12 times I
u
+20%):
Figure 2-7: Frequency sensitivity of the n-short-circuit releases
The increase in tripping current is approximately 30% for DC voltage.
Frequency converters
The thermal switch disconnectors do not have to be corrected when you
use frequency converters.
40
30
20
10
0
-10
-20
-30
050
100
200 250 300 350 400
Hz150
Tripping current
Change in %

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