Siemens SIRIUS System Manual

3RT1/3RH1 contactors
SIRIUS System Manual
GWA 4NEB 430 0999-02b
3-97
3.5.4 Changing the contact piece
The contact pieces can be replaced in contactors of frame sizes S2 to S3.
When they are replaced for the third time, the arcing chamber also has to be
replaced.
Frame size S2
Figure 3-77: Replacing the contact piece (frame size S2)
Remove the left identification
label, loosen the 2 screws on
the frontplate of the contactor,
and remove the top section of
the contactor
(1, 2, 3)
.
Remove the movable contact
piece by gently tipping it
upward and then pulling it out
(4, 5)
. Loosen the screws that
attach the two immovable con-
tact pieces
(6)
.
Remove the old contact pieces
(7)
, and screw on the new con-
tact pieces
(8)
. Push in a new
movable contact piece
(9)
.
Replace the top section of the
contactor, and tighten the 2
screws on the frontplate.
Replace the identification label.
3
2
1
2
4
5
6
9
7
8
11
12
10
11

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