3RU11, 3RB10, and 3RB12 overload relays
SIRIUS System Manual
4-28
GWA 4NEB 430 0999-02b
Removing the device
from the rail
Contactor/overload relay combination
S00/S0:
Push the contactor downward, and swing it forward (without a tool)
S2/S3:
1
Remove the overload relay from the contactor.
2
Use a screwdriver to release the snap-on mounting on the contactor
(this is shown in Section 3.5 on the installation and removal of contac-
tors).
Screw-on mounting
Overload relay with holder for stand-alone installation
The overload relay is screwed on by means of 2 M4 screws in the openings
in the holder for stand-alone installation using the maximum tightening
torque of 1.5 to 2 Nm. The screws are secured with washers and spring lock
washers.
Contactor/overload relay combination
1
Mount the contactor on a flat surface with 2 M4 screws.
2
Mount the overload relay on the contactor.
Minimum clearance
Maintain a minimum clearance from grounded parts at the side of
>6.5mm.
Installation positions
3RU11
The drawings below show the permissible installation positions for the
3RU11 overload relays for mounting on contactors and stand-alone installa-
tion. If the installation position is in the shaded area, an adjustment of 10%
must be made.
Figure 4-22: Permissible installation positions for the 3RU11
3RB10/3RB12
Any installation position is possible for the 3RB10 and 3RB12.
Contactor + overload relay
Overload relay in stand-alone
installation
135°
0°
135°
I
e
x 1.1
NSB01364
45°
45°
90° 90°
0°
e
x 1.1
I
e
x 1.1
135°
0°
135°
I
e
x 1.1
NSB01363
22.5°
22.5°
0°
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