Siemens SIRIUS System Manual

3RT1/3RH1 contactors
SIRIUS System Manual
3-92
GWA 4NEB 430 0999-02b
3 3RT1/3RH1 contactors
3.5.3 Changing the magnet coils
4 coil terminals
Contactors of frame sizes S0 to S3 have 4 coil terminals.
The advantages of this are as follows:
• Variable connection, depending on the amount of space and cable routing
• Easier wiring of feeders
The connection options are:
• From above with in fuseless configuration with circuit breakers
connected above
• From below when fuses are used with an overload relay attached directly
below
• Diagonal
Changing the magnet
coils
The magnet coils can be replaced in the case of contactors of frame sizes
S0 to S3.
S0 - AC operation
The following illustration shows the replacement of the magnet coil in frame
size S0 in AC operation:
Figure 3-72: Replacing the magnet coil (frame size S0/AC)
Use screwdrivers to lever up
the release clips between the
rear and front contactor halves
and remove the front part of
the contactor.
Remove the magnet coil from
the rear half of the contactor.
Push in the new magnet coil,
and put the front section of the
contactor back on again.
Important:
Make sure that the springs
between the magnet coil and
the front contactor half sit
straight on the mounting
(4a)
.
1
2
1
3
5
4
4a

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