Figure 3-18: 4-Pole Contactor Combination For Reversing (Frame Size S2); Figure 3-19: Nc Contact Interlock (Frame Size S00) - Siemens sirius System Manual

NO contact function
not locked
Mounting and connec-
tion
Conductor cross-sec-
tions
SIRIUS System Manual
GWA 4NEB 430 0999-02b
The following table shows you how to set up the 4-pole contactor combina-
tion for reversing in frame size S2:
Drawing: frame size S2
3RA1932-2G
3
3
1

Figure 3-18: 4-pole contactor combination for reversing (frame size S2)

If contactors are used with 1 NO contact that is intended for an auxiliary
function (e.g. as a signaling device), the wiring module must be separated.
The illustration below shows you the wiring for this function:

Figure 3-19: NC contact interlock (frame size S00)

The contactor combinations for reversing have screw-type connections that
are suitable for both screw-on and snap-on mounting on a 35 mm rail.
The permissible conductor cross-sections of the contactor combinations for
reversing correspond to those of the basic units for the corresponding frame
size.
Step
1/2
3
2
3RA1924-2B
3RT1/3RH1 contactors
Procedure
Mount the mechanical inter-
lock between the two con-
tactors (1/2).
Press the two connecting
clips (3) onto the back of the
two contactors.
3-39