3RT1/3RH1 contactors
SIRIUS System Manual
GWA 4NEB 430 0999-02b
3-47
Compensating for dif-
ferent depths
In star-delta combinations with contactors of different frame sizes, it is nec-
essary to compensate for the mounting depth of the smaller contactor.
One frame size is the maximum difference possible.
The following depth compensation must be made for a mechanical interlock
attached at the side:
• S2-S2-S0: K3: 1.5 mm; K2: 0 mm
• S3-S3-S2: K3: 0 mm; K2: 27.5 mm
Mounting and connec-
tion
The star-delta combinations have screw-type connections that are suitable
for both screw-on and snap-on mounting on the 35 mm rail.
Conductor cross-sec-
tions
The permissible conductor cross-sections of the star-delta combinations cor-
respond to those of the basic units for the corresponding frame size.
Circuit diagrams
Main circuit: S00, S0, S2, S3
Figure 3-25: Star-delta combination, main circuit (frame sizes S00 to S3)
L1
L2
L3
F1
K1 K3
M
3
~
NSB00642
U1
V1
W1
F0
K2
135
2
46
W2
U2
V2
135
246
M
U1
V1
W1
W2
U2
V2
3AC 50Hz ...V
3
~
L1
L2
L3
F1
K1 K3
M
3
~
NSB00645
U1
V1
W1
F0
K2
135
2
46
W2
U2
V2
135
246
M
U1
V1
W1
W2
U2
V2
3AC 50Hz ...V
3
~
L1
L2
L3
F1
K1 K3
M
3
~
NSB00648
U1
V1
W1
F0
K2
135
2
46
W2
U2
V2
135
246
M
U1
V1
W1
W2
U2
V2
3AC 50Hz ...V
3
~
F0
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