Siemens SIRIUS System Manual

3RT1/3RH1 contactors
SIRIUS System Manual
GWA 4NEB 430 0999-02b
3-13
Coordination type 2
After short-circuit disconnections, there must be no damage to the load
feeder devices. The only exception is if the contactor contacts have been
welded and can be easily separated again without distorting the contact
pieces.
Contactors with over-
load relay
If contactors are combined with an overload relay, a smaller fuse as speci-
fied in the NSK catalog on permissible short-circuit protection fuses for
motor starters should be used.
The information required to ensure unwelded fusing of the contactors is
contained in the NSK catalog.
3.2.3 Operation
3.2.3.1 General information
Ambient temperature
The 3RT10 contactors are designed for use in ambient temperatures of
-25 °C to +60 °C. Some variants can be used in temperatures of -35 °C to
+70 °C.
Degree of protection
The degree of protection of the SIRIUS contactors is IP20.
Warning
When the supply voltage and load are present, the contactor must not be
actuated by pressing the contact support. It is permissible, however, to
carry out tests with an extra-low test voltage (e.g.
≤
24 V).

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